1 | -- |
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2 | -- pgdijkstra postgis related functions |
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3 | -- |
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4 | -- |
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5 | -- Copyright (c) 2005 Sylvain Pasche, |
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6 | -- 2006-2007 Anton A. Patrushev, Orkney, Inc. |
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7 | -- |
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8 | -- This program is free software; you can redistribute it and/or modify |
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9 | -- it under the terms of the GNU General Public License as published by |
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10 | -- the Free Software Foundation; either version 2 of the License, or |
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11 | -- (at your option) any later version. |
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12 | -- |
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13 | -- This program is distributed in the hope that it will be useful, |
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14 | -- but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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16 | -- GNU General Public License for more details. |
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17 | -- |
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18 | -- You should have received a copy of the GNU General Public License |
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19 | -- along with this program; if not, write to the Free Software |
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20 | -- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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21 | |
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22 | |
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23 | -- TODO: use spatial index when possible |
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24 | -- TODO: make variable names more consistent |
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25 | |
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26 | -- Geometry schema description: |
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27 | -- gid |
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28 | -- source_id |
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29 | -- target_id |
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30 | -- edge_id |
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31 | |
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32 | -- BEGIN; |
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33 | |
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34 | ----------------------------------------------------------------------- |
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35 | -- For each vertex in the vertices table, set a point geometry which is |
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36 | -- the corresponding line start or line end point |
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37 | ----------------------------------------------------------------------- |
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38 | CREATE OR REPLACE FUNCTION add_vertices_geometry(geom_table varchar) |
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39 | RETURNS VOID AS |
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40 | $$ |
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41 | DECLARE |
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42 | vertices_table varchar := quote_ident(geom_table) || '_vertices'; |
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43 | BEGIN |
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44 | |
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45 | BEGIN |
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46 | EXECUTE 'SELECT addGeometryColumn(''' || |
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47 | quote_ident(vertices_table) || |
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48 | ''', ''the_geom'', -1, ''POINT'', 2)'; |
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49 | EXCEPTION |
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50 | WHEN DUPLICATE_COLUMN THEN |
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51 | END; |
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52 | |
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53 | EXECUTE 'UPDATE ' || quote_ident(vertices_table) || |
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54 | ' SET the_geom = NULL'; |
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55 | |
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56 | EXECUTE 'UPDATE ' || quote_ident(vertices_table) || |
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57 | ' SET the_geom = startPoint(geometryn(m.the_geom, 1)) FROM ' || |
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58 | quote_ident(geom_table) || |
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59 | ' m where geom_id = m.source_id'; |
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60 | |
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61 | EXECUTE 'UPDATE ' || quote_ident(vertices_table) || |
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62 | ' set the_geom = endPoint(geometryn(m.the_geom, 1)) FROM ' || |
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63 | quote_ident(geom_table) || |
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64 | ' m where geom_id = m.target_id AND ' || |
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65 | quote_ident(vertices_table) || |
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66 | '.the_geom IS NULL'; |
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67 | |
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68 | RETURN; |
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69 | END; |
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70 | $$ |
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71 | LANGUAGE 'plpgsql' VOLATILE STRICT; |
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72 | |
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73 | ----------------------------------------------------------------------- |
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74 | -- This function should not be used directly. Use assign_vertex_id instead |
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75 | -- |
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76 | -- Inserts a point into a temporary vertices table, and return an id |
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77 | -- of a new point or an existing point. Tolerance is the minimal distance |
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78 | -- between existing points and the new point to create a new point. |
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79 | ----------------------------------------------------------------------- |
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80 | CREATE OR REPLACE FUNCTION point_to_id(point geometry, |
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81 | tolerance double precision) |
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82 | RETURNS INT AS |
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83 | $$ |
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84 | DECLARE |
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85 | row record; |
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86 | point_id int; |
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87 | BEGIN |
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88 | LOOP |
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89 | -- TODO: use && and index |
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90 | SELECT INTO row id, the_geom FROM vertices_tmp WHERE |
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91 | distance(the_geom, point) < tolerance; |
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92 | |
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93 | point_id := row.id; |
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94 | |
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95 | IF NOT FOUND THEN |
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96 | INSERT INTO vertices_tmp (the_geom) VALUES (point); |
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97 | ELSE |
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98 | EXIT; |
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99 | END IF; |
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100 | END LOOP; |
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101 | RETURN point_id; |
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102 | END; |
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103 | $$ |
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104 | LANGUAGE 'plpgsql' VOLATILE STRICT; |
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105 | |
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106 | |
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107 | ----------------------------------------------------------------------- |
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108 | -- Fill the source_id and target_id column for all lines. All line ends |
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109 | -- with a distance less than tolerance, are assigned the same id |
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110 | ----------------------------------------------------------------------- |
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111 | CREATE OR REPLACE FUNCTION assign_vertex_id(geom_table varchar, |
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112 | tolerance double precision, |
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113 | geo_cname varchar, |
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114 | gid_cname varchar) |
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115 | RETURNS VARCHAR AS |
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116 | $$ |
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117 | DECLARE |
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118 | points record; |
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119 | i record; |
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120 | source_id int; |
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121 | target_id int; |
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122 | pre varchar; |
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123 | post varchar; |
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124 | |
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125 | BEGIN |
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126 | |
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127 | BEGIN |
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128 | DROP TABLE vertices_tmp; |
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129 | EXCEPTION |
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130 | WHEN UNDEFINED_TABLE THEN |
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131 | END; |
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132 | |
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133 | CREATE TABLE vertices_tmp ( id serial ); |
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134 | |
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135 | EXECUTE $q$ SELECT addGeometryColumn('vertices_tmp', 'the_geom', |
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136 | (SELECT srid FROM geometry_columns WHERE f_table_name='$q$ || quote_ident(geom_table) || $q$') , 'POINT', 2) $q$; |
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137 | |
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138 | CREATE INDEX vertices_tmp_idx ON vertices_tmp USING GIST (the_geom); |
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139 | |
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140 | pre = ''; |
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141 | post = ''; |
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142 | |
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143 | FOR i in EXECUTE 'SELECT count(*) as t from ' || quote_ident(geom_table) || ' WHERE NumGeometries(' || quote_ident(geo_cname) || ') is not null' loop |
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144 | IF (i.t > 0) THEN |
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145 | pre = 'geometryN('; |
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146 | post = ' , 1)'; |
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147 | END IF; |
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148 | END LOOP; |
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149 | |
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150 | FOR points IN EXECUTE 'SELECT ' || quote_ident(gid_cname) || ' AS id,' |
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151 | || ' startPoint(' || pre || quote_ident(geo_cname) || post || ') AS source,' |
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152 | || ' endPoint(' || pre || quote_ident(geo_cname) || post || ') as target' |
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153 | || ' FROM ' || quote_ident(geom_table) loop |
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154 | |
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155 | source_id := point_to_id(points.source, tolerance); |
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156 | target_id := point_to_id(points.target, tolerance); |
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157 | |
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158 | EXECUTE 'update ' || quote_ident(geom_table) || |
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159 | ' SET source_id = ' || source_id || |
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160 | ', target_id = ' || target_id || |
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161 | ' WHERE ' || quote_ident(gid_cname) || ' = ' || points.id; |
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162 | END LOOP; |
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163 | |
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164 | RETURN 'OK'; |
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165 | |
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166 | END; |
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167 | $$ |
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168 | LANGUAGE 'plpgsql' VOLATILE STRICT; |
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169 | |
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170 | ----------------------------------------------------------------------- |
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171 | -- Update the cost column from the edges table, from the length of |
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172 | -- all lines which belong to an edge. |
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173 | ----------------------------------------------------------------------- |
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174 | -- FIXME: directed or not ? |
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175 | CREATE OR REPLACE FUNCTION update_cost_from_distance(geom_table varchar) |
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176 | RETURNS VOID AS |
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177 | $$ |
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178 | DECLARE |
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179 | BEGIN |
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180 | BEGIN |
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181 | EXECUTE 'CREATE INDEX ' || quote_ident(geom_table) || |
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182 | '_edge_id_idx ON ' || quote_ident(geom_table) || |
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183 | ' (edge_id)'; |
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184 | EXCEPTION |
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185 | WHEN DUPLICATE_TABLE THEN |
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186 | RAISE NOTICE 'Not creating index, already there'; |
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187 | END; |
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188 | |
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189 | EXECUTE 'UPDATE ' || quote_ident(geom_table) || |
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190 | '_edges SET cost = (SELECT sum( length( g.the_geom ) ) FROM ' || |
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191 | quote_ident(geom_table) || |
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192 | ' g WHERE g.edge_id = id GROUP BY id)'; |
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193 | |
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194 | RETURN; |
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195 | END; |
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196 | $$ |
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197 | LANGUAGE 'plpgsql' VOLATILE STRICT; |
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198 | |
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199 | |
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200 | CREATE TYPE geoms AS |
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201 | ( |
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202 | gid int4, |
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203 | the_geom geometry |
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204 | ); |
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205 | |
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206 | ----------------------------------------------------------------------- |
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207 | -- Compute the shortest path using edges and vertices table, and return |
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208 | -- the result as a set of (gid integer, the_geom gemoetry) records. |
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209 | -- This function uses the internal vertices identifiers. |
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210 | ----------------------------------------------------------------------- |
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211 | CREATE OR REPLACE FUNCTION shortest_path_as_geometry_internal_id( |
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212 | geom_table varchar, source int4, target int4) |
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213 | RETURNS SETOF GEOMS AS |
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214 | $$ |
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215 | DECLARE |
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216 | r record; |
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217 | path_result record; |
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218 | v_id integer; |
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219 | e_id integer; |
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220 | geom geoms; |
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221 | BEGIN |
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222 | |
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223 | FOR path_result IN EXECUTE 'SELECT gid,the_geom FROM ' || |
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224 | 'shortest_path(''SELECT gid as id, source::integer, target::integer, ' || |
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225 | 'length::double precision as cost FROM ' || |
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226 | quote_ident(geom_table) || ''', ' || quote_literal(source) || |
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227 | ' , ' || quote_literal(target) || ' , false, false), ' || |
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228 | quote_ident(geom_table) || ' where edge_id = gid ' |
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229 | LOOP |
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230 | |
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231 | geom.gid := path_result.gid; |
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232 | geom.the_geom := path_result.the_geom; |
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233 | |
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234 | RETURN NEXT geom; |
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235 | |
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236 | END LOOP; |
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237 | RETURN; |
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238 | END; |
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239 | $$ |
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240 | LANGUAGE 'plpgsql' VOLATILE STRICT; |
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241 | |
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242 | CREATE OR REPLACE FUNCTION shortest_path_as_geometry_internal_id_directed( |
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243 | geom_table varchar, source int4, target int4, dir boolean, rc boolean) |
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244 | RETURNS SETOF GEOMS AS |
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245 | $$ |
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246 | DECLARE |
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247 | r record; |
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248 | path_result record; |
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249 | v_id integer; |
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250 | e_id integer; |
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251 | geom geoms; |
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252 | query text; |
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253 | BEGIN |
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254 | |
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255 | query := 'SELECT gid,the_geom FROM ' || |
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256 | 'shortest_path(''SELECT gid as id, source::integer, target::integer, ' || |
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257 | 'length::double precision as cost '; |
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258 | |
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259 | IF rc THEN query := query || ', reverse_cost '; |
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260 | END IF; |
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261 | |
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262 | query := query || 'FROM ' || quote_ident(geom_table) || ''', ' || quote_literal(source) || |
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263 | ' , ' || quote_literal(target) || ' , '''||dir||''', '''||rc||'''), ' || |
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264 | quote_ident(geom_table) || ' where edge_id = gid '; |
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265 | |
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266 | FOR path_result IN EXECUTE query |
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267 | LOOP |
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268 | |
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269 | geom.gid := path_result.gid; |
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270 | geom.the_geom := path_result.the_geom; |
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271 | |
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272 | RETURN NEXT geom; |
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273 | |
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274 | END LOOP; |
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275 | RETURN; |
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276 | END; |
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277 | $$ |
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278 | LANGUAGE 'plpgsql' VOLATILE STRICT; |
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279 | |
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280 | ----------------------------------------------------------------------- |
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281 | -- Compute the shortest path using edges and vertices table, and return |
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282 | -- the result as a set of (gid integer, the_geom gemoetry) records. |
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283 | ----------------------------------------------------------------------- |
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284 | CREATE OR REPLACE FUNCTION shortest_path_as_geometry(geom_table varchar, |
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285 | geom_source anyelement,geom_target anyelement) |
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286 | RETURNS SETOF GEOMS AS |
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287 | $$ |
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288 | DECLARE |
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289 | r record; |
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290 | source int4; |
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291 | target int4; |
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292 | path_result record; |
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293 | v_id integer; |
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294 | e_id integer; |
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295 | geom geoms; |
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296 | BEGIN |
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297 | FOR r IN EXECUTE 'SELECT id FROM ' || quote_ident(geom_table) || |
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298 | '_vertices WHERE geom_id = ' || quote_literal(geom_source) LOOP |
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299 | |
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300 | source = r.id; |
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301 | |
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302 | END LOOP; |
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303 | |
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304 | IF source IS NULL THEN |
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305 | RAISE EXCEPTION 'Can''t find source edge'; |
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306 | END IF; |
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307 | |
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308 | FOR r IN EXECUTE 'SELECT id FROM ' || quote_ident(geom_table) || |
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309 | '_vertices WHERE geom_id = ' || quote_literal(geom_target) LOOP |
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310 | target = r.id; |
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311 | END LOOP; |
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312 | |
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313 | IF target IS NULL THEN |
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314 | RAISE EXCEPTION 'Can''t find target edge'; |
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315 | END IF; |
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316 | |
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317 | FOR geom IN SELECT * FROM |
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318 | shortest_path_as_geometry_internal_id(geom_table, |
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319 | source, target) LOOP |
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320 | RETURN NEXT geom; |
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321 | END LOOP; |
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322 | |
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323 | RETURN; |
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324 | END; |
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325 | $$ |
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326 | LANGUAGE 'plpgsql' VOLATILE STRICT; |
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327 | |
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328 | |
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329 | ----------------------------------------------------------------------- |
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330 | -- Compute the shortest path using edges and vertices table, and return |
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331 | -- the result as a set of (gid integer, the_geom gemoetry) records. |
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332 | -- This function uses the internal vertices identifiers. |
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333 | -- Also data clipping added to improve function performance. |
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334 | ----------------------------------------------------------------------- |
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335 | CREATE OR REPLACE FUNCTION shortest_path_astar1_as_geometry_internal_id( |
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336 | varchar,int4, int4, float8) |
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337 | RETURNS SETOF GEOMS AS |
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338 | $$ |
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339 | DECLARE |
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340 | geom_table ALIAS FOR $1; |
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341 | sourceid ALIAS FOR $2; |
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342 | targetid ALIAS FOR $3; |
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343 | delta ALIAS FOR $4; |
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344 | |
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345 | rec record; |
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346 | r record; |
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347 | path_result record; |
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348 | v_id integer; |
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349 | e_id integer; |
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350 | geom geoms; |
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351 | |
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352 | BEGIN |
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353 | FOR path_result IN EXECUTE 'SELECT gid,the_geom FROM ' || |
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354 | 'shortest_path_astar1_as_geometry_internal_id_directed(''' || |
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355 | quote_ident(geom_table) || ''', ' || quote_literal(sourceid) || ', ' || |
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356 | quote_literal(targetid) || ', ' || delta || ', false, false)' |
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357 | LOOP |
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358 | |
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359 | geom.gid := path_result.gid; |
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360 | geom.the_geom := path_result.the_geom; |
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361 | |
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362 | RETURN NEXT geom; |
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363 | -- |
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364 | -- v_id = path_result.vertex_id; |
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365 | -- e_id = path_result.edge_id; |
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366 | |
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367 | -- FOR r IN EXECUTE 'SELECT gid, the_geom FROM ' || |
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368 | -- quote_ident(geom_table) || ' WHERE gid = ' || |
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369 | -- quote_literal(e_id) LOOP |
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370 | -- geom.gid := r.gid; |
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371 | -- geom.the_geom := r.the_geom; |
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372 | -- RETURN NEXT geom; |
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373 | -- END LOOP; |
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374 | |
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375 | END LOOP; |
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376 | RETURN; |
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377 | END; |
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378 | $$ |
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379 | LANGUAGE 'plpgsql' VOLATILE STRICT; |
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380 | |
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381 | CREATE OR REPLACE FUNCTION shortest_path_astar1_as_geometry_internal_id_directed( |
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382 | varchar,int4, int4, float8, boolean, boolean) |
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383 | RETURNS SETOF GEOMS AS |
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384 | $$ |
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385 | DECLARE |
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386 | geom_table ALIAS FOR $1; |
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387 | sourceid ALIAS FOR $2; |
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388 | targetid ALIAS FOR $3; |
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389 | delta ALIAS FOR $4; |
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390 | dir ALIAS FOR $5; |
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391 | rc ALIAS FOR $6; |
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392 | |
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393 | rec record; |
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394 | r record; |
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395 | path_result record; |
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396 | v_id integer; |
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397 | e_id integer; |
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398 | geom geoms; |
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399 | |
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400 | srid integer; |
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401 | |
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402 | source_x float8; |
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403 | source_y float8; |
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404 | target_x float8; |
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405 | target_y float8; |
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406 | |
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407 | ll_x float8; |
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408 | ll_y float8; |
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409 | ur_x float8; |
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410 | ur_y float8; |
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411 | |
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412 | query text; |
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413 | |
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414 | BEGIN |
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415 | FOR rec IN EXECUTE |
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416 | 'select srid(the_geom) from ' || |
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417 | quote_ident(geom_table) || ' limit 1' |
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418 | LOOP |
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419 | END LOOP; |
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420 | srid := rec.srid; |
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421 | |
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422 | FOR rec IN EXECUTE |
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423 | 'select x(startpoint(the_geom)) as source_x from ' || |
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424 | quote_ident(geom_table) || ' where source = ' || |
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425 | sourceid || ' or target='||sourceid||' limit 1' |
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426 | LOOP |
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427 | END LOOP; |
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428 | source_x := rec.source_x; |
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429 | |
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430 | FOR rec IN EXECUTE |
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431 | 'select y(startpoint(the_geom)) as source_y from ' || |
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432 | quote_ident(geom_table) || ' where source = ' || |
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433 | sourceid || ' or target='||sourceid||' limit 1' |
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434 | LOOP |
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435 | END LOOP; |
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436 | |
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437 | source_y := rec.source_y; |
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438 | |
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439 | FOR rec IN EXECUTE |
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440 | 'select x(startpoint(the_geom)) as target_x from ' || |
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441 | quote_ident(geom_table) || ' where source = ' || |
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442 | targetid || ' or target='||targetid||' limit 1' |
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443 | LOOP |
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444 | END LOOP; |
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445 | |
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446 | target_x := rec.target_x; |
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447 | |
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448 | FOR rec IN EXECUTE |
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449 | 'select y(startpoint(the_geom)) as target_y from ' || |
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450 | quote_ident(geom_table) || ' where source = ' || |
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451 | targetid || ' or target='||targetid||' limit 1' |
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452 | LOOP |
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453 | END LOOP; |
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454 | target_y := rec.target_y; |
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455 | |
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456 | FOR rec IN EXECUTE 'SELECT CASE WHEN '||source_x||'<'||target_x|| |
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457 | ' THEN '||source_x||' ELSE '||target_x|| |
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458 | ' END as ll_x, CASE WHEN '||source_x||'>'||target_x|| |
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459 | ' THEN '||source_x||' ELSE '||target_x||' END as ur_x' |
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460 | LOOP |
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461 | END LOOP; |
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462 | |
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463 | ll_x := rec.ll_x; |
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464 | ur_x := rec.ur_x; |
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465 | |
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466 | FOR rec IN EXECUTE 'SELECT CASE WHEN '||source_y||'<'|| |
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467 | target_y||' THEN '||source_y||' ELSE '|| |
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468 | target_y||' END as ll_y, CASE WHEN '|| |
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469 | source_y||'>'||target_y||' THEN '|| |
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470 | source_y||' ELSE '||target_y||' END as ur_y' |
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471 | LOOP |
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472 | END LOOP; |
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473 | |
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474 | ll_y := rec.ll_y; |
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475 | ur_y := rec.ur_y; |
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476 | |
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477 | query := 'SELECT gid,the_geom FROM ' || |
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478 | 'shortest_path_astar(''SELECT gid as id, source::integer, ' || |
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479 | 'target::integer, length::double precision as cost, ' || |
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480 | 'x1::double precision, y1::double precision, x2::double ' || |
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481 | 'precision, y2::double precision '; |
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482 | |
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483 | IF rc THEN query := query || ' , reverse_cost '; |
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484 | END IF; |
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485 | |
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486 | query := query || 'FROM ' || quote_ident(geom_table) || ' where setSRID(''''BOX3D('|| |
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487 | ll_x-delta||' '||ll_y-delta||','||ur_x+delta||' '|| |
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488 | ur_y+delta||')''''::BOX3D, ' || srid || ') && the_geom'', ' || |
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489 | quote_literal(sourceid) || ' , ' || |
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490 | quote_literal(targetid) || ' , '''||dir||''', '''||rc||''' ),' || |
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491 | quote_ident(geom_table) || ' where edge_id = gid '; |
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492 | |
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493 | FOR path_result IN EXECUTE query |
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494 | LOOP |
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495 | geom.gid := path_result.gid; |
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496 | geom.the_geom := path_result.the_geom; |
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497 | |
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498 | RETURN NEXT geom; |
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499 | -- |
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500 | -- v_id = path_result.vertex_id; |
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501 | -- e_id = path_result.edge_id; |
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502 | |
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503 | -- FOR r IN EXECUTE 'SELECT gid, the_geom FROM ' || |
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504 | -- quote_ident(geom_table) || ' WHERE gid = ' || |
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505 | -- quote_literal(e_id) LOOP |
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506 | -- geom.gid := r.gid; |
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507 | -- geom.the_geom := r.the_geom; |
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508 | -- RETURN NEXT geom; |
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509 | -- END LOOP; |
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510 | |
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511 | END LOOP; |
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512 | RETURN; |
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513 | END; |
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514 | $$ |
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515 | LANGUAGE 'plpgsql' VOLATILE STRICT; |
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516 | |
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517 | |
---|
518 | CREATE OR REPLACE FUNCTION shortest_path_astar3_as_geometry_internal_id( |
---|
519 | varchar,int4, int4, float8, varchar) |
---|
520 | RETURNS SETOF GEOMS AS |
---|
521 | $$ |
---|
522 | DECLARE |
---|
523 | geom_table ALIAS FOR $1; |
---|
524 | sourceid ALIAS FOR $2; |
---|
525 | targetid ALIAS FOR $3; |
---|
526 | delta ALIAS FOR $4; |
---|
527 | cost_column ALIAS FOR $5; |
---|
528 | |
---|
529 | rec record; |
---|
530 | r record; |
---|
531 | path_result record; |
---|
532 | v_id integer; |
---|
533 | e_id integer; |
---|
534 | geom geoms; |
---|
535 | |
---|
536 | BEGIN |
---|
537 | FOR path_result IN EXECUTE 'SELECT gid,the_geom FROM ' || |
---|
538 | 'shortest_path_astar3_as_geometry_internal_id_directed(''' || |
---|
539 | quote_ident(geom_table) || ''', ' || quote_literal(sourceid) || ', ' || |
---|
540 | quote_literal(targetid) || ', ' || delta || ',' || |
---|
541 | quote_literal(cost_column) || ', false, false)' |
---|
542 | LOOP |
---|
543 | |
---|
544 | geom.gid := path_result.gid; |
---|
545 | geom.the_geom := path_result.the_geom; |
---|
546 | |
---|
547 | RETURN NEXT geom; |
---|
548 | |
---|
549 | END LOOP; |
---|
550 | RETURN; |
---|
551 | END; |
---|
552 | $$ |
---|
553 | LANGUAGE 'plpgsql' VOLATILE STRICT; |
---|
554 | |
---|
555 | CREATE OR REPLACE FUNCTION shortest_path_astar3_as_geometry_internal_id_directed( |
---|
556 | varchar,int4, int4, float8, varchar, boolean, boolean) |
---|
557 | RETURNS SETOF GEOMS AS |
---|
558 | $$ |
---|
559 | DECLARE |
---|
560 | geom_table ALIAS FOR $1; |
---|
561 | sourceid ALIAS FOR $2; |
---|
562 | targetid ALIAS FOR $3; |
---|
563 | delta ALIAS FOR $4; |
---|
564 | cost_column ALIAS FOR $5; |
---|
565 | dir ALIAS FOR $6; |
---|
566 | rc ALIAS FOR $7; |
---|
567 | |
---|
568 | rec record; |
---|
569 | r record; |
---|
570 | path_result record; |
---|
571 | v_id integer; |
---|
572 | e_id integer; |
---|
573 | geom geoms; |
---|
574 | |
---|
575 | srid integer; |
---|
576 | |
---|
577 | source_x float8; |
---|
578 | source_y float8; |
---|
579 | target_x float8; |
---|
580 | target_y float8; |
---|
581 | |
---|
582 | ll_x float8; |
---|
583 | ll_y float8; |
---|
584 | ur_x float8; |
---|
585 | ur_y float8; |
---|
586 | |
---|
587 | query text; |
---|
588 | |
---|
589 | BEGIN |
---|
590 | FOR rec IN EXECUTE |
---|
591 | 'select srid(the_geom) from ' || |
---|
592 | quote_ident(geom_table) || ' limit 1' |
---|
593 | LOOP |
---|
594 | END LOOP; |
---|
595 | srid := rec.srid; |
---|
596 | |
---|
597 | FOR rec IN EXECUTE |
---|
598 | 'select x(startpoint(the_geom)) as source_x from ' || |
---|
599 | quote_ident(geom_table) || ' where source = ' || |
---|
600 | sourceid || ' or target='||sourceid||' limit 1' |
---|
601 | LOOP |
---|
602 | END LOOP; |
---|
603 | source_x := rec.source_x; |
---|
604 | |
---|
605 | FOR rec IN EXECUTE |
---|
606 | 'select y(startpoint(the_geom)) as source_y from ' || |
---|
607 | quote_ident(geom_table) || ' where source = ' || |
---|
608 | sourceid || ' or target='||sourceid||' limit 1' |
---|
609 | LOOP |
---|
610 | END LOOP; |
---|
611 | |
---|
612 | source_y := rec.source_y; |
---|
613 | |
---|
614 | FOR rec IN EXECUTE |
---|
615 | 'select x(startpoint(the_geom)) as target_x from ' || |
---|
616 | quote_ident(geom_table) || ' where source = ' || |
---|
617 | targetid || ' or target='||targetid||' limit 1' |
---|
618 | LOOP |
---|
619 | END LOOP; |
---|
620 | |
---|
621 | target_x := rec.target_x; |
---|
622 | |
---|
623 | FOR rec IN EXECUTE |
---|
624 | 'select y(startpoint(the_geom)) as target_y from ' || |
---|
625 | quote_ident(geom_table) || ' where source = ' || |
---|
626 | targetid || ' or target='||targetid||' limit 1' |
---|
627 | LOOP |
---|
628 | END LOOP; |
---|
629 | target_y := rec.target_y; |
---|
630 | |
---|
631 | |
---|
632 | FOR rec IN EXECUTE 'SELECT CASE WHEN '||source_x||'<'||target_x|| |
---|
633 | ' THEN '||source_x||' ELSE '||target_x|| |
---|
634 | ' END as ll_x, CASE WHEN '||source_x||'>'||target_x|| |
---|
635 | ' THEN '||source_x||' ELSE '||target_x||' END as ur_x' |
---|
636 | LOOP |
---|
637 | END LOOP; |
---|
638 | |
---|
639 | ll_x := rec.ll_x; |
---|
640 | ur_x := rec.ur_x; |
---|
641 | |
---|
642 | FOR rec IN EXECUTE 'SELECT CASE WHEN '||source_y||'<'|| |
---|
643 | target_y||' THEN '||source_y||' ELSE '|| |
---|
644 | target_y||' END as ll_y, CASE WHEN '|| |
---|
645 | source_y||'>'||target_y||' THEN '|| |
---|
646 | source_y||' ELSE '||target_y||' END as ur_y' |
---|
647 | LOOP |
---|
648 | END LOOP; |
---|
649 | |
---|
650 | ll_y := rec.ll_y; |
---|
651 | ur_y := rec.ur_y; |
---|
652 | |
---|
653 | query := 'SELECT gid,the_geom FROM ' || |
---|
654 | 'shortest_path_astar(''SELECT gid as id, source::integer, ' || |
---|
655 | 'target::integer, '||cost_column||'::double precision as cost, ' || |
---|
656 | 'x1::double precision, y1::double precision, x2::double ' || |
---|
657 | 'precision, y2::double precision '; |
---|
658 | |
---|
659 | IF rc THEN query := query || ' , reverse_cost '; |
---|
660 | END IF; |
---|
661 | |
---|
662 | query := query || 'FROM ' || quote_ident(geom_table) || ' where setSRID(''''BOX3D('|| |
---|
663 | ll_x-delta||' '||ll_y-delta||','||ur_x+delta||' '|| |
---|
664 | ur_y+delta||')''''::BOX3D, ' || srid || ') && the_geom'', ' || |
---|
665 | quote_literal(sourceid) || ' , ' || |
---|
666 | quote_literal(targetid) || ' , '''||dir||''', '''||rc||''' ),' || |
---|
667 | quote_ident(geom_table) || ' where edge_id = gid '; |
---|
668 | |
---|
669 | FOR path_result IN EXECUTE query |
---|
670 | LOOP |
---|
671 | |
---|
672 | geom.gid := path_result.gid; |
---|
673 | geom.the_geom := path_result.the_geom; |
---|
674 | |
---|
675 | RETURN NEXT geom; |
---|
676 | |
---|
677 | END LOOP; |
---|
678 | RETURN; |
---|
679 | END; |
---|
680 | $$ |
---|
681 | LANGUAGE 'plpgsql' VOLATILE STRICT; |
---|
682 | |
---|
683 | |
---|
684 | CREATE OR REPLACE FUNCTION shortest_path_dijkstra1_as_geometry_internal_id( |
---|
685 | varchar,int4, int4, float8) |
---|
686 | RETURNS SETOF GEOMS AS |
---|
687 | $$ |
---|
688 | DECLARE |
---|
689 | geom_table ALIAS FOR $1; |
---|
690 | sourceid ALIAS FOR $2; |
---|
691 | targetid ALIAS FOR $3; |
---|
692 | delta ALIAS FOR $4; |
---|
693 | |
---|
694 | rec record; |
---|
695 | r record; |
---|
696 | path_result record; |
---|
697 | v_id integer; |
---|
698 | e_id integer; |
---|
699 | geom geoms; |
---|
700 | |
---|
701 | BEGIN |
---|
702 | FOR path_result IN EXECUTE 'SELECT gid,the_geom FROM ' || |
---|
703 | 'shortest_path_dijkstra1_as_geometry_internal_id_directed(''' || |
---|
704 | quote_ident(geom_table) || ''', ' || quote_literal(sourceid) || ', ' || |
---|
705 | quote_literal(targetid) || ', ' || delta || ', false, false)' |
---|
706 | LOOP |
---|
707 | geom.gid := path_result.gid; |
---|
708 | geom.the_geom := path_result.the_geom; |
---|
709 | |
---|
710 | RETURN NEXT geom; |
---|
711 | |
---|
712 | END LOOP; |
---|
713 | RETURN; |
---|
714 | END; |
---|
715 | $$ |
---|
716 | LANGUAGE 'plpgsql' VOLATILE STRICT; |
---|
717 | |
---|
718 | CREATE OR REPLACE FUNCTION shortest_path_dijkstra1_as_geometry_internal_id_directed( |
---|
719 | varchar,int4, int4, float8, boolean, boolean) |
---|
720 | RETURNS SETOF GEOMS AS |
---|
721 | $$ |
---|
722 | DECLARE |
---|
723 | geom_table ALIAS FOR $1; |
---|
724 | sourceid ALIAS FOR $2; |
---|
725 | targetid ALIAS FOR $3; |
---|
726 | delta ALIAS FOR $4; |
---|
727 | dir ALIAS FOR $5; |
---|
728 | rc ALIAS FOR $6; |
---|
729 | |
---|
730 | rec record; |
---|
731 | r record; |
---|
732 | path_result record; |
---|
733 | v_id integer; |
---|
734 | e_id integer; |
---|
735 | geom geoms; |
---|
736 | |
---|
737 | srid integer; |
---|
738 | |
---|
739 | source_x float8; |
---|
740 | source_y float8; |
---|
741 | target_x float8; |
---|
742 | target_y float8; |
---|
743 | |
---|
744 | ll_x float8; |
---|
745 | ll_y float8; |
---|
746 | ur_x float8; |
---|
747 | ur_y float8; |
---|
748 | |
---|
749 | query text; |
---|
750 | BEGIN |
---|
751 | FOR rec IN EXECUTE |
---|
752 | 'select srid(the_geom) from ' || |
---|
753 | quote_ident(geom_table) || ' limit 1' |
---|
754 | LOOP |
---|
755 | END LOOP; |
---|
756 | srid := rec.srid; |
---|
757 | |
---|
758 | FOR rec IN EXECUTE |
---|
759 | 'select x(startpoint(the_geom)) as source_x from ' || |
---|
760 | quote_ident(geom_table) || ' where source = ' || |
---|
761 | sourceid || ' or target='||sourceid||' limit 1' |
---|
762 | LOOP |
---|
763 | END LOOP; |
---|
764 | source_x := rec.source_x; |
---|
765 | |
---|
766 | FOR rec IN EXECUTE |
---|
767 | 'select y(startpoint(the_geom)) as source_y from ' || |
---|
768 | quote_ident(geom_table) || ' where source = ' || |
---|
769 | sourceid || ' or target='||sourceid||' limit 1' |
---|
770 | LOOP |
---|
771 | END LOOP; |
---|
772 | |
---|
773 | source_y := rec.source_y; |
---|
774 | |
---|
775 | FOR rec IN EXECUTE |
---|
776 | 'select x(startpoint(the_geom)) as target_x from ' || |
---|
777 | quote_ident(geom_table) || ' where source = ' || |
---|
778 | targetid || ' or target='||targetid||' limit 1' |
---|
779 | LOOP |
---|
780 | END LOOP; |
---|
781 | |
---|
782 | target_x := rec.target_x; |
---|
783 | |
---|
784 | FOR rec IN EXECUTE |
---|
785 | 'select y(startpoint(the_geom)) as target_y from ' || |
---|
786 | quote_ident(geom_table) || ' where source = ' || |
---|
787 | targetid || ' or target='||targetid||' limit 1' |
---|
788 | LOOP |
---|
789 | END LOOP; |
---|
790 | target_y := rec.target_y; |
---|
791 | |
---|
792 | |
---|
793 | FOR rec IN EXECUTE 'SELECT CASE WHEN '||source_x||'<'||target_x|| |
---|
794 | ' THEN '||source_x||' ELSE '||target_x|| |
---|
795 | ' END as ll_x, CASE WHEN '||source_x||'>'||target_x|| |
---|
796 | ' THEN '||source_x||' ELSE '||target_x||' END as ur_x' |
---|
797 | LOOP |
---|
798 | END LOOP; |
---|
799 | |
---|
800 | ll_x := rec.ll_x; |
---|
801 | ur_x := rec.ur_x; |
---|
802 | |
---|
803 | FOR rec IN EXECUTE 'SELECT CASE WHEN '||source_y||'<'|| |
---|
804 | target_y||' THEN '||source_y||' ELSE '|| |
---|
805 | target_y||' END as ll_y, CASE WHEN '|| |
---|
806 | source_y||'>'||target_y||' THEN '|| |
---|
807 | source_y||' ELSE '||target_y||' END as ur_y' |
---|
808 | LOOP |
---|
809 | END LOOP; |
---|
810 | |
---|
811 | ll_y := rec.ll_y; |
---|
812 | ur_y := rec.ur_y; |
---|
813 | |
---|
814 | query := 'SELECT gid,the_geom FROM ' || |
---|
815 | 'shortest_path(''SELECT gid as id, source::integer, target::integer, ' || |
---|
816 | 'length::double precision as cost '; |
---|
817 | |
---|
818 | IF rc THEN query := query || ' , reverse_cost '; |
---|
819 | END IF; |
---|
820 | |
---|
821 | query := query || ' FROM ' || quote_ident(geom_table) || ' where setSRID(''''BOX3D('|| |
---|
822 | ll_x-delta||' '||ll_y-delta||','||ur_x+delta||' '|| |
---|
823 | ur_y+delta||')''''::BOX3D, ' || srid || ') && the_geom'', ' || |
---|
824 | quote_literal(sourceid) || ' , ' || |
---|
825 | quote_literal(targetid) || ' , '''||dir||''', '''||rc||''' ), ' || |
---|
826 | quote_ident(geom_table) || ' where edge_id = gid '; |
---|
827 | |
---|
828 | FOR path_result IN EXECUTE query |
---|
829 | LOOP |
---|
830 | geom.gid := path_result.gid; |
---|
831 | geom.the_geom := path_result.the_geom; |
---|
832 | |
---|
833 | RETURN NEXT geom; |
---|
834 | |
---|
835 | END LOOP; |
---|
836 | RETURN; |
---|
837 | END; |
---|
838 | $$ |
---|
839 | LANGUAGE 'plpgsql' VOLATILE STRICT; |
---|
840 | |
---|
841 | |
---|
842 | CREATE OR REPLACE FUNCTION shortest_path_astar2_as_geometry_internal_id( |
---|
843 | varchar,int4, int4, float8, float8, float8, float8) |
---|
844 | RETURNS SETOF GEOMS AS |
---|
845 | $$ |
---|
846 | DECLARE |
---|
847 | geom_table ALIAS FOR $1; |
---|
848 | sourceid ALIAS FOR $2; |
---|
849 | targetid ALIAS FOR $3; |
---|
850 | ll_x ALIAS FOR $4; |
---|
851 | ll_y ALIAS FOR $5; |
---|
852 | ur_x ALIAS FOR $6; |
---|
853 | ur_y ALIAS FOR $7; |
---|
854 | |
---|
855 | rec record; |
---|
856 | r record; |
---|
857 | path_result record; |
---|
858 | v_id integer; |
---|
859 | e_id integer; |
---|
860 | geom geoms; |
---|
861 | |
---|
862 | srid integer; |
---|
863 | |
---|
864 | |
---|
865 | BEGIN |
---|
866 | FOR path_result IN EXECUTE 'SELECT gid,the_geom FROM ' || |
---|
867 | 'shortest_path_astar2_as_geometry_internal_id_directed(''' || |
---|
868 | quote_ident(geom_table) || ''', ' || quote_literal(sourceid) || ', ' || |
---|
869 | quote_literal(targetid) || ', ' || ll_x || ', ' || ll_y || ', ' || |
---|
870 | ur_x || ', ' || ur_y || ', false, false)' |
---|
871 | LOOP |
---|
872 | |
---|
873 | geom.gid := path_result.gid; |
---|
874 | geom.the_geom := path_result.the_geom; |
---|
875 | |
---|
876 | RETURN NEXT geom; |
---|
877 | |
---|
878 | END LOOP; |
---|
879 | RETURN; |
---|
880 | END; |
---|
881 | $$ |
---|
882 | LANGUAGE 'plpgsql' VOLATILE STRICT; |
---|
883 | |
---|
884 | CREATE OR REPLACE FUNCTION shortest_path_astar2_as_geometry_internal_id_directed( |
---|
885 | varchar,int4, int4, float8, float8, float8, float8, boolean, boolean) |
---|
886 | RETURNS SETOF GEOMS AS |
---|
887 | $$ |
---|
888 | DECLARE |
---|
889 | geom_table ALIAS FOR $1; |
---|
890 | sourceid ALIAS FOR $2; |
---|
891 | targetid ALIAS FOR $3; |
---|
892 | ll_x ALIAS FOR $4; |
---|
893 | ll_y ALIAS FOR $5; |
---|
894 | ur_x ALIAS FOR $6; |
---|
895 | ur_y ALIAS FOR $7; |
---|
896 | dir ALIAS FOR $8; |
---|
897 | rc ALIAS FOR $9; |
---|
898 | |
---|
899 | rec record; |
---|
900 | r record; |
---|
901 | path_result record; |
---|
902 | v_id integer; |
---|
903 | e_id integer; |
---|
904 | geom geoms; |
---|
905 | |
---|
906 | srid integer; |
---|
907 | |
---|
908 | query text; |
---|
909 | |
---|
910 | BEGIN |
---|
911 | FOR rec IN EXECUTE |
---|
912 | 'select srid(the_geom) from ' || |
---|
913 | quote_ident(geom_table) || ' limit 1' |
---|
914 | LOOP |
---|
915 | END LOOP; |
---|
916 | srid := rec.srid; |
---|
917 | |
---|
918 | query := 'SELECT gid,the_geom FROM ' || |
---|
919 | 'shortest_path_astar(''SELECT gid as id, source::integer, ' || |
---|
920 | 'target::integer, length::double precision as cost, ' || |
---|
921 | 'x1::double precision, y1::double precision, ' || |
---|
922 | 'x2::double precision, y2::double precision '; |
---|
923 | |
---|
924 | IF rc THEN query := query || ' , reverse_cost '; |
---|
925 | END IF; |
---|
926 | |
---|
927 | query := query || 'FROM ' || |
---|
928 | quote_ident(geom_table) || ' where setSRID(''''BOX3D('||ll_x||' '|| |
---|
929 | ll_y||','||ur_x||' '||ur_y||')''''::BOX3D, ' || srid || |
---|
930 | ') && the_geom'', ' || quote_literal(sourceid) || ' , ' || |
---|
931 | quote_literal(targetid) || ' , '''||dir||''', '''||rc||''' ),' || |
---|
932 | quote_ident(geom_table) || ' where edge_id = gid '; |
---|
933 | |
---|
934 | FOR path_result IN EXECUTE query |
---|
935 | LOOP |
---|
936 | geom.gid := path_result.gid; |
---|
937 | geom.the_geom := path_result.the_geom; |
---|
938 | |
---|
939 | RETURN NEXT geom; |
---|
940 | |
---|
941 | END LOOP; |
---|
942 | RETURN; |
---|
943 | END; |
---|
944 | $$ |
---|
945 | LANGUAGE 'plpgsql' VOLATILE STRICT; |
---|
946 | |
---|
947 | |
---|
948 | CREATE OR REPLACE FUNCTION shortest_path_astar_as_geometry_internal_id( |
---|
949 | geom_table varchar, source int4, target int4) |
---|
950 | RETURNS SETOF GEOMS AS |
---|
951 | $$ |
---|
952 | DECLARE |
---|
953 | r record; |
---|
954 | path_result record; |
---|
955 | v_id integer; |
---|
956 | e_id integer; |
---|
957 | geom geoms; |
---|
958 | |
---|
959 | BEGIN |
---|
960 | FOR path_result IN EXECUTE 'SELECT gid,the_geom FROM ' || |
---|
961 | 'shortest_path_astar_as_geometry_internal_id_directed(''' || |
---|
962 | quote_ident(geom_table) || ''', ' || quote_literal(source) || ', ' || |
---|
963 | quote_literal(target) || ', false, false)' |
---|
964 | LOOP |
---|
965 | |
---|
966 | geom.gid := path_result.gid; |
---|
967 | geom.the_geom := path_result.the_geom; |
---|
968 | |
---|
969 | RETURN NEXT geom; |
---|
970 | |
---|
971 | END LOOP; |
---|
972 | RETURN; |
---|
973 | END; |
---|
974 | $$ |
---|
975 | LANGUAGE 'plpgsql' VOLATILE STRICT; |
---|
976 | |
---|
977 | CREATE OR REPLACE FUNCTION shortest_path_astar_as_geometry_internal_id_directed( |
---|
978 | geom_table varchar, source int4, target int4, dir boolean, rc boolean) |
---|
979 | RETURNS SETOF GEOMS AS |
---|
980 | $$ |
---|
981 | DECLARE |
---|
982 | r record; |
---|
983 | path_result record; |
---|
984 | v_id integer; |
---|
985 | e_id integer; |
---|
986 | geom geoms; |
---|
987 | |
---|
988 | query text; |
---|
989 | |
---|
990 | BEGIN |
---|
991 | query := 'SELECT gid,the_geom FROM ' || |
---|
992 | 'shortest_path_astar(''SELECT gid as id, source::integer, ' || |
---|
993 | 'target::integer, length::double precision as cost, ' || |
---|
994 | 'x1::double precision, y1::double precision, ' || |
---|
995 | 'x2::double precision, y2::double precision '; |
---|
996 | |
---|
997 | IF rc THEN query := query || ' , reverse_cost '; |
---|
998 | END IF; |
---|
999 | |
---|
1000 | query := query || 'FROM ' || quote_ident(geom_table) || ' '', ' || |
---|
1001 | quote_literal(source) || ' , ' || |
---|
1002 | quote_literal(target) || ' , '''||dir||''', '''||rc||'''), ' || |
---|
1003 | quote_ident(geom_table) || ' where edge_id = gid '; |
---|
1004 | |
---|
1005 | FOR path_result IN EXECUTE query |
---|
1006 | LOOP |
---|
1007 | |
---|
1008 | geom.gid := path_result.gid; |
---|
1009 | geom.the_geom := path_result.the_geom; |
---|
1010 | |
---|
1011 | RETURN NEXT geom; |
---|
1012 | |
---|
1013 | END LOOP; |
---|
1014 | RETURN; |
---|
1015 | END; |
---|
1016 | $$ |
---|
1017 | LANGUAGE 'plpgsql' VOLATILE STRICT; |
---|
1018 | |
---|
1019 | ----------------------------------------------------------------------- |
---|
1020 | -- Set of function for TSP solving. |
---|
1021 | ----------------------------------------------------------------------- |
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1022 | CREATE OR REPLACE FUNCTION tsp_as_geometry_internal_id(geom_table varchar, |
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1023 | ids varchar, source integer) |
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1024 | RETURNS SETOF integer AS |
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1025 | $$ |
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1026 | DECLARE |
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1027 | r record; |
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1028 | path_result record; |
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1029 | v_id integer; |
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1030 | prev integer; |
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1031 | |
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1032 | BEGIN |
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1033 | prev := -1; |
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1034 | FOR path_result IN EXECUTE 'SELECT vertex_id FROM tsp(''select distinct source::integer as source_id, x(startpoint(the_geom)), y(startpoint(the_geom)) from ' || |
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1035 | quote_ident(geom_table) || ' where source in (' || |
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1036 | ids || ')'', '''|| ids ||''', '|| source ||')' LOOP |
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1037 | |
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1038 | v_id = path_result.vertex_id; |
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1039 | RETURN NEXT v_id; |
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1040 | END LOOP; |
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1041 | |
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1042 | RETURN; |
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1043 | END; |
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1044 | $$ |
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1045 | LANGUAGE 'plpgsql' VOLATILE STRICT; |
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1046 | |
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1047 | |
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1048 | CREATE OR REPLACE FUNCTION tsp_astar_as_geometry_internal_id( |
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1049 | geom_table varchar,ids varchar, source integer) |
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1050 | RETURNS SETOF GEOMS AS |
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1051 | $$ |
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1052 | DECLARE |
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1053 | r record; |
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1054 | path_result record; |
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1055 | v_id integer; |
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1056 | prev integer; |
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1057 | geom geoms; |
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1058 | |
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1059 | BEGIN |
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1060 | prev := source; |
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1061 | FOR path_result IN EXECUTE 'SELECT vertex_id FROM tsp(''select distinct source::integer as source_id, x1::double precision as x, y1::double precision as y from ' || |
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1062 | quote_ident(geom_table) || ' where source in (' || |
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1063 | ids || ')'', '''|| ids ||''', '|| source ||')' LOOP |
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1064 | |
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1065 | v_id = path_result.vertex_id; |
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1066 | |
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1067 | FOR r IN EXECUTE 'SELECT gid, the_geom FROM shortest_path_astar1_as_geometry_internal_id( ''' || |
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1068 | quote_ident(geom_table) ||''', '|| v_id ||', '|| |
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1069 | prev ||',0.03)' LOOP |
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1070 | geom.gid := r.gid; |
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1071 | geom.the_geom := r.the_geom; |
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1072 | RETURN NEXT geom; |
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1073 | END LOOP; |
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1074 | |
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1075 | prev = v_id; |
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1076 | END LOOP; |
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1077 | RETURN; |
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1078 | END; |
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1079 | $$ |
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1080 | LANGUAGE 'plpgsql' VOLATILE STRICT; |
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1081 | |
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1082 | CREATE OR REPLACE FUNCTION tsp_astar_as_geometry_internal_id_directed( |
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1083 | geom_table varchar,ids varchar, source integer, delta float8, dir boolean, rc boolean) |
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1084 | RETURNS SETOF GEOMS AS |
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1085 | $$ |
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1086 | DECLARE |
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1087 | r record; |
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1088 | path_result record; |
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1089 | v_id integer; |
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1090 | prev integer; |
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1091 | geom geoms; |
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1092 | |
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1093 | query text; |
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1094 | |
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1095 | BEGIN |
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1096 | prev := source; |
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1097 | query := 'SELECT vertex_id FROM tsp(''select distinct source::integer '|| |
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1098 | 'as source_id, x1::double precision as x, y1::double precision as y'; |
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1099 | |
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1100 | IF rc THEN query := query || ' , reverse_cost '; |
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1101 | END IF; |
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1102 | |
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1103 | query := query || 'from ' || quote_ident(geom_table) || ' where source in (' || |
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1104 | ids || ')'', '''|| ids ||''', '|| source ||')'; |
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1105 | |
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1106 | FOR path_result IN EXECUTE query |
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1107 | LOOP |
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1108 | |
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1109 | v_id = path_result.vertex_id; |
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1110 | |
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1111 | FOR r IN EXECUTE 'SELECT gid, the_geom FROM shortest_path_astar1_as_geometry_internal_id_directed( ''' || |
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1112 | quote_ident(geom_table) ||''', '|| v_id ||', '|| |
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1113 | prev ||','||delta||', '''||dir||''', '''||rc||''')' LOOP |
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1114 | geom.gid := r.gid; |
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1115 | geom.the_geom := r.the_geom; |
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1116 | RETURN NEXT geom; |
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1117 | END LOOP; |
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1118 | |
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1119 | prev = v_id; |
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1120 | END LOOP; |
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1121 | RETURN; |
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1122 | END; |
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1123 | $$ |
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1124 | LANGUAGE 'plpgsql' VOLATILE STRICT; |
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1125 | |
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1126 | |
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1127 | CREATE OR REPLACE FUNCTION tsp_dijkstra_as_geometry_internal_id( |
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1128 | geom_table varchar,ids varchar, source integer) |
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1129 | RETURNS SETOF GEOMS AS |
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1130 | $$ |
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1131 | DECLARE |
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1132 | r record; |
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1133 | path_result record; |
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1134 | v_id integer; |
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1135 | prev integer; |
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1136 | geom geoms; |
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1137 | |
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1138 | BEGIN |
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1139 | prev := source; |
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1140 | FOR path_result IN EXECUTE 'SELECT vertex_id FROM tsp(''select distinct source::integer as source_id, x(startpoint(the_geom)), y(startpoint(the_geom)) from ' || |
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1141 | quote_ident(geom_table) || ' where source in (' || |
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1142 | ids || ')'', '''|| ids ||''', '|| source ||')' LOOP |
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1143 | |
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1144 | v_id = path_result.vertex_id; |
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1145 | |
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1146 | |
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1147 | FOR r IN EXECUTE 'SELECT gid, the_geom FROM shortest_path_dijkstra1_as_geometry_internal_id( ''' || |
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1148 | quote_ident(geom_table) ||''', '|| v_id ||', '|| |
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1149 | prev ||',0.03)' LOOP |
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1150 | geom.gid := r.gid; |
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1151 | geom.the_geom := r.the_geom; |
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1152 | RETURN NEXT geom; |
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1153 | END LOOP; |
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1154 | |
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1155 | prev = v_id; |
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1156 | END LOOP; |
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1157 | RETURN; |
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1158 | END; |
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1159 | $$ |
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1160 | LANGUAGE 'plpgsql' VOLATILE STRICT; |
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1161 | |
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1162 | CREATE OR REPLACE FUNCTION tsp_dijkstra_as_geometry_internal_id_directed( |
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1163 | geom_table varchar,ids varchar, source integer, delta float8, dir boolean, rc boolean) |
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1164 | RETURNS SETOF GEOMS AS |
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1165 | $$ |
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1166 | DECLARE |
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1167 | r record; |
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1168 | path_result record; |
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1169 | v_id integer; |
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1170 | prev integer; |
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1171 | geom geoms; |
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1172 | |
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1173 | query text; |
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1174 | |
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1175 | BEGIN |
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1176 | prev := source; |
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1177 | |
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1178 | query := 'SELECT vertex_id FROM tsp(''select distinct source::integer as source_id, '|| |
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1179 | 'x(startpoint(the_geom)), y(startpoint(the_geom))'; |
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1180 | |
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1181 | IF rc THEN query := query || ' , reverse_cost '; |
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1182 | END IF; |
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1183 | |
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1184 | query := 'from ' || quote_ident(geom_table) || ' where source in (' || |
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1185 | ids || ')'', '''|| ids ||''', '|| source ||')'; |
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1186 | |
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1187 | FOR path_result IN EXECUTE query |
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1188 | LOOP |
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1189 | |
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1190 | v_id = path_result.vertex_id; |
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1191 | |
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1192 | |
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1193 | FOR r IN EXECUTE 'SELECT gid, the_geom FROM shortest_path_dijkstra1_as_geometry_internal_id_directed( ''' || |
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1194 | quote_ident(geom_table) ||''', '|| v_id ||', '|| |
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1195 | prev ||','||delta||', '''||dir||''', '''||rc||''')' LOOP |
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1196 | geom.gid := r.gid; |
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1197 | geom.the_geom := r.the_geom; |
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1198 | RETURN NEXT geom; |
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1199 | END LOOP; |
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1200 | |
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1201 | prev = v_id; |
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1202 | END LOOP; |
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1203 | RETURN; |
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1204 | END; |
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1205 | $$ |
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1206 | LANGUAGE 'plpgsql' VOLATILE STRICT; |
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1207 | |
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1208 | |
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1209 | CREATE OR REPLACE FUNCTION points_as_polygon(query varchar) |
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1210 | RETURNS SETOF GEOMS AS |
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1211 | $$ |
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1212 | DECLARE |
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1213 | r record; |
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1214 | path_result record; |
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1215 | i int; |
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1216 | q text; |
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1217 | x float8[]; |
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1218 | y float8[]; |
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1219 | geom geoms; |
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1220 | BEGIN |
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1221 | |
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1222 | i := 1; |
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1223 | q := 'select 1 as gid, GeometryFromText(''POLYGON(('; |
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1224 | |
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1225 | FOR path_result IN EXECUTE 'select x, y from alphashape('''|| |
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1226 | query || ''')' LOOP |
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1227 | x[i] = path_result.x; |
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1228 | y[i] = path_result.y; |
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1229 | i := i+1; |
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1230 | END LOOP; |
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1231 | |
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1232 | q := q || x[1] || ' ' || y[1]; |
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1233 | i := 2; |
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1234 | |
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1235 | WHILE x[i] IS NOT NULL LOOP |
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1236 | q := q || ', ' || x[i] || ' ' || y[i]; |
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1237 | i := i + 1; |
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1238 | END LOOP; |
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1239 | |
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1240 | q := q || ', ' || x[1] || ' ' || y[1]; |
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1241 | q := q || '))'',-1) as the_geom'; |
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1242 | |
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1243 | FOR r in EXECUTE q LOOP |
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1244 | geom.gid=r.gid; |
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1245 | geom.the_geom=r.the_geom; |
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1246 | RETURN NEXT geom; |
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1247 | END LOOP; |
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1248 | |
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1249 | RETURN; |
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1250 | END; |
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1251 | $$ |
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1252 | |
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1253 | LANGUAGE 'plpgsql' VOLATILE STRICT; |
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1254 | |
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1255 | CREATE OR REPLACE FUNCTION shooting_star_route( |
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1256 | varchar,int4, int4, float8, varchar, boolean, boolean) |
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1257 | RETURNS SETOF GEOMS AS |
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1258 | $$ |
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1259 | DECLARE |
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1260 | geom_table ALIAS FOR $1; |
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1261 | sourceid ALIAS FOR $2; |
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1262 | targetid ALIAS FOR $3; |
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1263 | delta ALIAS FOR $4; |
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1264 | cost_column ALIAS FOR $5; |
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1265 | dir ALIAS FOR $6; |
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1266 | rc ALIAS FOR $7; |
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1267 | |
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1268 | rec record; |
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1269 | r record; |
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1270 | path_result record; |
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1271 | v_id integer; |
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1272 | e_id integer; |
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1273 | geom geoms; |
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1274 | |
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1275 | srid integer; |
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1276 | |
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1277 | source_x float8; |
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1278 | source_y float8; |
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1279 | target_x float8; |
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1280 | target_y float8; |
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1281 | |
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1282 | ll_x float8; |
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1283 | ll_y float8; |
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1284 | ur_x float8; |
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1285 | ur_y float8; |
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1286 | |
---|
1287 | query text; |
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1288 | |
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1289 | BEGIN |
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1290 | FOR rec IN EXECUTE |
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1291 | 'select srid(the_geom) from ' || |
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1292 | quote_ident(geom_table) || ' limit 1' |
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1293 | LOOP |
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1294 | END LOOP; |
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1295 | srid := rec.srid; |
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1296 | |
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1297 | FOR rec IN EXECUTE |
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1298 | 'select x(startpoint(the_geom)) as source_x from ' || |
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1299 | quote_ident(geom_table) || ' where gid = '||sourceid |
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1300 | LOOP |
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1301 | END LOOP; |
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1302 | source_x := rec.source_x; |
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1303 | |
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1304 | FOR rec IN EXECUTE |
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1305 | 'select y(startpoint(the_geom)) as source_y from ' || |
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1306 | quote_ident(geom_table) || ' where gid = ' ||sourceid |
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1307 | LOOP |
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1308 | END LOOP; |
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1309 | |
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1310 | source_y := rec.source_y; |
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1311 | |
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1312 | FOR rec IN EXECUTE |
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1313 | 'select x(startpoint(the_geom)) as target_x from ' || |
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1314 | quote_ident(geom_table) || ' where gid = ' ||targetid |
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1315 | LOOP |
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1316 | END LOOP; |
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1317 | |
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1318 | target_x := rec.target_x; |
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1319 | |
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1320 | FOR rec IN EXECUTE |
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1321 | 'select y(startpoint(the_geom)) as target_y from ' || |
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1322 | quote_ident(geom_table) || ' where gid = ' ||targetid |
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1323 | LOOP |
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1324 | END LOOP; |
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1325 | target_y := rec.target_y; |
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1326 | |
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1327 | FOR rec IN EXECUTE 'SELECT CASE WHEN '||source_x||'<'||target_x|| |
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1328 | ' THEN '||source_x||' ELSE '||target_x|| |
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1329 | ' END as ll_x, CASE WHEN '||source_x||'>'||target_x|| |
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1330 | ' THEN '||source_x||' ELSE '||target_x||' END as ur_x' |
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1331 | LOOP |
---|
1332 | END LOOP; |
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1333 | |
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1334 | ll_x := rec.ll_x; |
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1335 | ur_x := rec.ur_x; |
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1336 | |
---|
1337 | FOR rec IN EXECUTE 'SELECT CASE WHEN '||source_y||'<'|| |
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1338 | target_y||' THEN '||source_y||' ELSE '|| |
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1339 | target_y||' END as ll_y, CASE WHEN '|| |
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1340 | source_y||'>'||target_y||' THEN '|| |
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1341 | source_y||' ELSE '||target_y||' END as ur_y' |
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1342 | LOOP |
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1343 | END LOOP; |
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1344 | |
---|
1345 | ll_y := rec.ll_y; |
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1346 | ur_y := rec.ur_y; |
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1347 | |
---|
1348 | query := 'SELECT gid,the_geom FROM ' || |
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1349 | 'shortest_path_shooting_star(''SELECT gid as id, source::integer, ' || |
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1350 | 'target::integer, '||cost_column||'::double precision as cost, ' || |
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1351 | 'x1::double precision, y1::double precision, x2::double ' || |
---|
1352 | 'precision, y2::double precision, rule::varchar, ' || |
---|
1353 | 'to_cost::double precision '; |
---|
1354 | |
---|
1355 | IF rc THEN query := query || ' , reverse_cost '; |
---|
1356 | END IF; |
---|
1357 | |
---|
1358 | query := query || 'FROM ' || quote_ident(geom_table) || ' where setSRID(''''BOX3D('|| |
---|
1359 | ll_x-delta||' '||ll_y-delta||','||ur_x+delta||' '|| |
---|
1360 | ur_y+delta||')''''::BOX3D, ' || srid || ') && the_geom'', ' || |
---|
1361 | quote_literal(sourceid) || ' , ' || |
---|
1362 | quote_literal(targetid) || ' , '''||dir||''', '''||rc||''' ),' || |
---|
1363 | quote_ident(geom_table) || ' where edge_id = gid '; |
---|
1364 | |
---|
1365 | FOR path_result IN EXECUTE query |
---|
1366 | LOOP |
---|
1367 | geom.gid := path_result.gid; |
---|
1368 | geom.the_geom := path_result.the_geom; |
---|
1369 | |
---|
1370 | RETURN NEXT geom; |
---|
1371 | |
---|
1372 | END LOOP; |
---|
1373 | RETURN; |
---|
1374 | END; |
---|
1375 | $$ |
---|
1376 | LANGUAGE 'plpgsql' VOLATILE STRICT; |
---|
1377 | |
---|
1378 | -- COMMIT; |
---|