Supported versions: latest (3.8) 3.7 3.6 3.5 3.4 3.3 3.2 3.1 3.0 main dev
Unsupported versions:2.6 2.5 2.4 2.3 2.2 2.1 2.0

pgr_analyzeGraph – Deprecated since 3.8.0

pgr_analyzeGraph — Analyzes the network topology.

Availability

  • Version 3.8.0

    • Deprecated function.

  • Version 2.0.0

    • Official function.

Migration of pgr_analyzeGraph

Starting from v3.8.0

Before Deprecation: The following was calculated:

  • Number of isolated segments.

  • Number of dead ends.

  • Number of potential gaps found near dead ends.

  • Number of intersections. (between 2 edges)

WHERE

Graph component:

A connected subgraph that is not part of any larger connected subgraph.

Isolated segment:

A graph component with only one segment.

Dead ends:

A vertex that participates in only one edge.

gaps:

Space between two geometries.

Intersection:

Is a topological relationship between two geometries.

Migration.

Components.

Instead of counting only isolated segments, determine all the components of the graph.

Depending of the final application requirements use:

For example:

SELECT *
FROM pgr_connectedComponents(
  'SELECT id, source, target, cost, reverse_cost FROM edges'
);
 seq | component | node
-----+-----------+------
   1 |         1 |    1
   2 |         1 |    3
   3 |         1 |    5
   4 |         1 |    6
   5 |         1 |    7
   6 |         1 |    8
   7 |         1 |    9
   8 |         1 |   10
   9 |         1 |   11
  10 |         1 |   12
  11 |         1 |   15
  12 |         1 |   16
  13 |         1 |   17
  14 |         2 |    2
  15 |         2 |    4
  16 |        13 |   13
  17 |        13 |   14
(17 rows)

Dead ends.

Instead of counting the dead ends, determine all the dead ends of the graph using pgr_degree.

For example:

SELECT *
FROM pgr_degree($$SELECT id, source, target FROM edges$$)
WHERE degree = 1;
 node | degree
------+--------
    9 |      1
    5 |      1
    4 |      1
   14 |      1
   13 |      1
    2 |      1
    1 |      1
(7 rows)

Potential gaps near dead ends.

Instead of counting potential gaps between geometries, determine the geometric gaps in the graph using pgr_findCloseEdges.

For example:

WITH
deadends AS (
  SELECT id,geom, (in_edges || out_edges)[1] as inhere
  FROM vertices where array_length(in_edges || out_edges, 1) = 1),
results AS (
  SELECT (pgr_findCloseEdges('SELECT id, geom FROM edges WHERE id != ' || inhere , geom, 0.001)).*
  FROM deadends)
SELECT d.id, edge_id, distance, st_AsText(geom) AS point, st_asText(edge) edge
FROM results JOIN deadends d USING (geom);
 id | edge_id |     distance      |           point           |                 edge
----+---------+-------------------+---------------------------+--------------------------------------
  4 |      14 | 1.00008890058e-12 | POINT(1.999999999999 3.5) | LINESTRING(1.999999999999 3.5,2 3.5)
(1 row)

Topological relationships.

Instead of counting intersections, determine topological relationships between geometries.

Several PostGIS functions can be used: ST_Intersects, ST_Crosses, ST_Overlaps, etc.

For example:

SELECT e1.id AS id1, e2.id AS id2
FROM edges e1, edges e2 WHERE e1 < e2 AND st_crosses(e1.geom, e2.geom);
 id1 | id2
-----+-----
  13 |  18
(1 row)

Description

The function returns:

  • OK after the analysis has finished.

  • FAIL when the analysis was not completed due to an error.

pgr_analyzeGraph(edge_table, tolerance, [options])
options: [the_geom, id, source, target, rows_where]
RETURNS VARCHAR

Prerequisites

The edge table to be analyzed must contain a source column and a target column filled with id’s of the vertices of the segments and the corresponding vertices table <edge_table>_vertices_pgr that stores the vertices information.

Parameters

The analyze graph function accepts the following parameters:

edge_table:

text Network table name. (may contain the schema name as well)

tolerance:

float8 Snapping tolerance of disconnected edges. (in projection unit)

the_geom:

text Geometry column name of the network table. Default value is the_geom.

id:

text Primary key column name of the network table. Default value is id.

source:

text Source column name of the network table. Default value is source.

target:

text Target column name of the network table. Default value is target.

rows_where:

text Condition to select a subset or rows. Default value is true to indicate all rows.

The function returns:

  • OK after the analysis has finished.

    • Uses the vertices table: <edge_table>_vertices_pgr.

    • Fills completely the cnt and chk columns of the vertices table.

    • Returns the analysis of the section of the network defined by rows_where

  • FAIL when the analysis was not completed due to an error.

    • The vertices table is not found.

    • A required column of the Network table is not found or is not of the appropriate type.

    • The condition is not well formed.

    • The names of source , target or id are the same.

    • The SRID of the geometry could not be determined.

The Vertices Table

The structure of the vertices table is:

id:

bigint Identifier of the vertex.

cnt:

integer Number of vertices in the edge_table that reference this vertex.

chk:

integer Indicator that the vertex might have a problem.

ein:

integer Number of vertices in the edge_table that reference this vertex as incoming.

eout:

integer Number of vertices in the edge_table that reference this vertex as outgoing.

the_geom:

geometry Point geometry of the vertex.

Usage when the edge table’s columns MATCH the default values:

The simplest way to use pgr_analyzeGraph is:

SELECT id, geom AS the_geom, 0 AS cnt, 0 AS chk INTO edges_vertices_pgr FROM vertices;
SELECT 17
SELECT  pgr_analyzeGraph('edges',0.001,'geom');
WARNING:  pgr_analyzegraph(text,double precision,text,text,text,text,text) deprecated function on v3.8.0
NOTICE:  PROCESSING:
NOTICE:  pgr_analyzeGraph('edges',0.001,'geom','id','source','target','true')
NOTICE:  Performing checks, please wait ...
NOTICE:  Analyzing for dead ends. Please wait...
NOTICE:  Analyzing for gaps. Please wait...
NOTICE:  Analyzing for isolated edges. Please wait...
NOTICE:  Analyzing for ring geometries. Please wait...
NOTICE:  Analyzing for intersections. Please wait...
NOTICE:              ANALYSIS RESULTS FOR SELECTED EDGES:
NOTICE:                    Isolated segments: 2
NOTICE:                            Dead ends: 7
NOTICE:  Potential gaps found near dead ends: 1
NOTICE:               Intersections detected: 1
NOTICE:                      Ring geometries: 0
 pgr_analyzegraph
------------------
 OK
(1 row)

Arguments are given in the order described in the parameters:

SELECT  pgr_analyzeGraph('edges',0.001,'geom','id','source','target');
WARNING:  pgr_analyzegraph(text,double precision,text,text,text,text,text) deprecated function on v3.8.0
NOTICE:  PROCESSING:
NOTICE:  pgr_analyzeGraph('edges',0.001,'geom','id','source','target','true')
NOTICE:  Performing checks, please wait ...
NOTICE:  Analyzing for dead ends. Please wait...
NOTICE:  Analyzing for gaps. Please wait...
NOTICE:  Analyzing for isolated edges. Please wait...
NOTICE:  Analyzing for ring geometries. Please wait...
NOTICE:  Analyzing for intersections. Please wait...
NOTICE:              ANALYSIS RESULTS FOR SELECTED EDGES:
NOTICE:                    Isolated segments: 2
NOTICE:                            Dead ends: 7
NOTICE:  Potential gaps found near dead ends: 1
NOTICE:               Intersections detected: 1
NOTICE:                      Ring geometries: 0
 pgr_analyzegraph
------------------
 OK
(1 row)

We get the same result as the simplest way to use the function.

Warning

An error would occur when

the arguments are not given in the appropriate order:

In this example, the column id of the table mytable is passed to the function as the geometry column, and the geometry column the_geom is passed to the function as the id column.

SELECT  pgr_analyzeGraph('edges',0.001,'id','geom','source','target');
WARNING:  pgr_analyzegraph(text,double precision,text,text,text,text,text) deprecated function on v3.8.0
NOTICE:  PROCESSING:
NOTICE:  pgr_analyzeGraph('edges',0.001,'id','geom','source','target','true')
NOTICE:  Performing checks, please wait ...
NOTICE:  Got function st_srid(bigint) does not exist
NOTICE:  ERROR: something went wrong when checking for SRID of id in table public.edges
 pgr_analyzegraph
------------------
 FAIL
(1 row)

When using the named notation

The order of the parameters do not matter:

SELECT  pgr_analyzeGraph('edges',0.001,the_geom:='geom',id:='id',source:='source',target:='target');
WARNING:  pgr_analyzegraph(text,double precision,text,text,text,text,text) deprecated function on v3.8.0
NOTICE:  PROCESSING:
NOTICE:  pgr_analyzeGraph('edges',0.001,'geom','id','source','target','true')
NOTICE:  Performing checks, please wait ...
NOTICE:  Analyzing for dead ends. Please wait...
NOTICE:  Analyzing for gaps. Please wait...
NOTICE:  Analyzing for isolated edges. Please wait...
NOTICE:  Analyzing for ring geometries. Please wait...
NOTICE:  Analyzing for intersections. Please wait...
NOTICE:              ANALYSIS RESULTS FOR SELECTED EDGES:
NOTICE:                    Isolated segments: 2
NOTICE:                            Dead ends: 7
NOTICE:  Potential gaps found near dead ends: 1
NOTICE:               Intersections detected: 1
NOTICE:                      Ring geometries: 0
 pgr_analyzegraph
------------------
 OK
(1 row)


SELECT  pgr_analyzeGraph('edges',0.001,source:='source',id:='id',target:='target',the_geom:='geom');
WARNING:  pgr_analyzegraph(text,double precision,text,text,text,text,text) deprecated function on v3.8.0
NOTICE:  PROCESSING:
NOTICE:  pgr_analyzeGraph('edges',0.001,'geom','id','source','target','true')
NOTICE:  Performing checks, please wait ...
NOTICE:  Analyzing for dead ends. Please wait...
NOTICE:  Analyzing for gaps. Please wait...
NOTICE:  Analyzing for isolated edges. Please wait...
NOTICE:  Analyzing for ring geometries. Please wait...
NOTICE:  Analyzing for intersections. Please wait...
NOTICE:              ANALYSIS RESULTS FOR SELECTED EDGES:
NOTICE:                    Isolated segments: 2
NOTICE:                            Dead ends: 7
NOTICE:  Potential gaps found near dead ends: 1
NOTICE:               Intersections detected: 1
NOTICE:                      Ring geometries: 0
 pgr_analyzegraph
------------------
 OK
(1 row)

Parameters defined with a default value can be omitted, as long as the value matches the default:

SELECT  pgr_analyzeGraph('edges',0.001, 'geom', source:='source');
WARNING:  pgr_analyzegraph(text,double precision,text,text,text,text,text) deprecated function on v3.8.0
NOTICE:  PROCESSING:
NOTICE:  pgr_analyzeGraph('edges',0.001,'geom','id','source','target','true')
NOTICE:  Performing checks, please wait ...
NOTICE:  Analyzing for dead ends. Please wait...
NOTICE:  Analyzing for gaps. Please wait...
NOTICE:  Analyzing for isolated edges. Please wait...
NOTICE:  Analyzing for ring geometries. Please wait...
NOTICE:  Analyzing for intersections. Please wait...
NOTICE:              ANALYSIS RESULTS FOR SELECTED EDGES:
NOTICE:                    Isolated segments: 2
NOTICE:                            Dead ends: 7
NOTICE:  Potential gaps found near dead ends: 1
NOTICE:               Intersections detected: 1
NOTICE:                      Ring geometries: 0
 pgr_analyzegraph
------------------
 OK
(1 row)

Selecting rows using rows_where parameter

Selecting rows based on the id. Displays the analysis a the section of the network.

SELECT  pgr_analyzeGraph('edges',0.001, 'geom', rows_where:='id < 10');
WARNING:  pgr_analyzegraph(text,double precision,text,text,text,text,text) deprecated function on v3.8.0
NOTICE:  PROCESSING:
NOTICE:  pgr_analyzeGraph('edges',0.001,'geom','id','source','target','id < 10')
NOTICE:  Performing checks, please wait ...
NOTICE:  Analyzing for dead ends. Please wait...
NOTICE:  Analyzing for gaps. Please wait...
NOTICE:  Analyzing for isolated edges. Please wait...
NOTICE:  Analyzing for ring geometries. Please wait...
NOTICE:  Analyzing for intersections. Please wait...
NOTICE:              ANALYSIS RESULTS FOR SELECTED EDGES:
NOTICE:                    Isolated segments: 0
NOTICE:                            Dead ends: 4
NOTICE:  Potential gaps found near dead ends: 0
NOTICE:               Intersections detected: 0
NOTICE:                      Ring geometries: 0
 pgr_analyzegraph
------------------
 OK
(1 row)

Selecting the rows where the geometry is near the geometry of row with id = 5

SELECT  pgr_analyzeGraph('edges',0.001, 'geom', rows_where:='geom && (SELECT st_buffer(geom,0.05) FROM edge_table WHERE id=5)');
WARNING:  pgr_analyzegraph(text,double precision,text,text,text,text,text) deprecated function on v3.8.0
NOTICE:  PROCESSING:
NOTICE:  pgr_analyzeGraph('edges',0.001,'geom','id','source','target','geom && (SELECT st_buffer(geom,0.05) FROM edge_table WHERE id=5)')
NOTICE:  Performing checks, please wait ...
NOTICE:  Got relation "edge_table" does not exist
NOTICE:  ERROR: Condition is not correct. Please execute the following query to test your condition
NOTICE:  select count(*) from public.edges WHERE true   AND (geom && (SELECT st_buffer(geom,0.05) FROM edge_table WHERE id=5))
 pgr_analyzegraph
------------------
 FAIL
(1 row)

Selecting the rows where the geometry is near the geometry of the row with gid =100 of the table othertable.

CREATE TABLE otherTable AS  (SELECT 100 AS gid, st_point(2.5,2.5) AS other_geom) ;
SELECT 1
SELECT  pgr_analyzeGraph('edges',0.001, 'geom', rows_where:='geom && (SELECT st_buffer(geom,1) FROM otherTable WHERE gid=100)');
WARNING:  pgr_analyzegraph(text,double precision,text,text,text,text,text) deprecated function on v3.8.0
NOTICE:  PROCESSING:
NOTICE:  pgr_analyzeGraph('edges',0.001,'geom','id','source','target','geom && (SELECT st_buffer(geom,1) FROM otherTable WHERE gid=100)')
NOTICE:  Performing checks, please wait ...
NOTICE:  Analyzing for dead ends. Please wait...
NOTICE:  Analyzing for gaps. Please wait...
NOTICE:  Analyzing for isolated edges. Please wait...
NOTICE:  Analyzing for ring geometries. Please wait...
NOTICE:  Analyzing for intersections. Please wait...
NOTICE:              ANALYSIS RESULTS FOR SELECTED EDGES:
NOTICE:                    Isolated segments: 2
NOTICE:                            Dead ends: 7
NOTICE:  Potential gaps found near dead ends: 1
NOTICE:               Intersections detected: 1
NOTICE:                      Ring geometries: 0
 pgr_analyzegraph
------------------
 OK
(1 row)

Usage when the edge table’s columns DO NOT MATCH the default values:

For the following table

CREATE TABLE mytable AS (SELECT id AS gid, source AS src ,target AS tgt , geom AS mygeom FROM edges);
SELECT 18
SELECT id, geom AS the_geom, 0 AS cnt, 0 AS chk INTO mytable_vertices_pgr FROM vertices;
SELECT 17

Using positional notation:

The arguments need to be given in the order described in the parameters:

SELECT  pgr_analyzeGraph('mytable',0.001,'mygeom','gid','src','tgt');
WARNING:  pgr_analyzegraph(text,double precision,text,text,text,text,text) deprecated function on v3.8.0
NOTICE:  PROCESSING:
NOTICE:  pgr_analyzeGraph('mytable',0.001,'mygeom','gid','src','tgt','true')
NOTICE:  Performing checks, please wait ...
NOTICE:  Analyzing for dead ends. Please wait...
NOTICE:  Analyzing for gaps. Please wait...
NOTICE:  Analyzing for isolated edges. Please wait...
NOTICE:  Analyzing for ring geometries. Please wait...
NOTICE:  Analyzing for intersections. Please wait...
NOTICE:              ANALYSIS RESULTS FOR SELECTED EDGES:
NOTICE:                    Isolated segments: 2
NOTICE:                            Dead ends: 7
NOTICE:  Potential gaps found near dead ends: 1
NOTICE:               Intersections detected: 1
NOTICE:                      Ring geometries: 0
 pgr_analyzegraph
------------------
 OK
(1 row)

Warning

An error would occur when the arguments are not given in the appropriate order: In this example, the column gid of the table mytable is passed to the function as the geometry column, and the geometry column mygeom is passed to the function as the id column.

SELECT  pgr_analyzeGraph('mytable',0.0001,'gid','mygeom','src','tgt');
WARNING:  pgr_analyzegraph(text,double precision,text,text,text,text,text) deprecated function on v3.8.0
NOTICE:  PROCESSING:
NOTICE:  pgr_analyzeGraph('mytable',0.0001,'gid','mygeom','src','tgt','true')
NOTICE:  Performing checks, please wait ...
NOTICE:  Got function st_srid(bigint) does not exist
NOTICE:  ERROR: something went wrong when checking for SRID of gid in table public.mytable
 pgr_analyzegraph
------------------
 FAIL
(1 row)

When using the named notation

The order of the parameters do not matter:

SELECT  pgr_analyzeGraph('mytable',0.001,the_geom:='mygeom',id:='gid',source:='src',target:='tgt');
WARNING:  pgr_analyzegraph(text,double precision,text,text,text,text,text) deprecated function on v3.8.0
NOTICE:  PROCESSING:
NOTICE:  pgr_analyzeGraph('mytable',0.001,'mygeom','gid','src','tgt','true')
NOTICE:  Performing checks, please wait ...
NOTICE:  Analyzing for dead ends. Please wait...
NOTICE:  Analyzing for gaps. Please wait...
NOTICE:  Analyzing for isolated edges. Please wait...
NOTICE:  Analyzing for ring geometries. Please wait...
NOTICE:  Analyzing for intersections. Please wait...
NOTICE:              ANALYSIS RESULTS FOR SELECTED EDGES:
NOTICE:                    Isolated segments: 2
NOTICE:                            Dead ends: 7
NOTICE:  Potential gaps found near dead ends: 1
NOTICE:               Intersections detected: 1
NOTICE:                      Ring geometries: 0
 pgr_analyzegraph
------------------
 OK
(1 row)


SELECT  pgr_analyzeGraph('mytable',0.001,source:='src',id:='gid',target:='tgt',the_geom:='mygeom');
WARNING:  pgr_analyzegraph(text,double precision,text,text,text,text,text) deprecated function on v3.8.0
NOTICE:  PROCESSING:
NOTICE:  pgr_analyzeGraph('mytable',0.001,'mygeom','gid','src','tgt','true')
NOTICE:  Performing checks, please wait ...
NOTICE:  Analyzing for dead ends. Please wait...
NOTICE:  Analyzing for gaps. Please wait...
NOTICE:  Analyzing for isolated edges. Please wait...
NOTICE:  Analyzing for ring geometries. Please wait...
NOTICE:  Analyzing for intersections. Please wait...
NOTICE:              ANALYSIS RESULTS FOR SELECTED EDGES:
NOTICE:                    Isolated segments: 2
NOTICE:                            Dead ends: 7
NOTICE:  Potential gaps found near dead ends: 1
NOTICE:               Intersections detected: 1
NOTICE:                      Ring geometries: 0
 pgr_analyzegraph
------------------
 OK
(1 row)

In this scenario omitting a parameter would create an error because the default values for the column names do not match the column names of the table.

Selecting rows using rows_where parameter

Selecting rows based on the id.

SELECT  pgr_analyzeGraph('mytable',0.001,'mygeom','gid','src','tgt',rows_where:='gid < 10');
WARNING:  pgr_analyzegraph(text,double precision,text,text,text,text,text) deprecated function on v3.8.0
NOTICE:  PROCESSING:
NOTICE:  pgr_analyzeGraph('mytable',0.001,'mygeom','gid','src','tgt','gid < 10')
NOTICE:  Performing checks, please wait ...
NOTICE:  Analyzing for dead ends. Please wait...
NOTICE:  Analyzing for gaps. Please wait...
NOTICE:  Analyzing for isolated edges. Please wait...
NOTICE:  Analyzing for ring geometries. Please wait...
NOTICE:  Analyzing for intersections. Please wait...
NOTICE:              ANALYSIS RESULTS FOR SELECTED EDGES:
NOTICE:                    Isolated segments: 0
NOTICE:                            Dead ends: 4
NOTICE:  Potential gaps found near dead ends: 0
NOTICE:               Intersections detected: 0
NOTICE:                      Ring geometries: 0
 pgr_analyzegraph
------------------
 OK
(1 row)


SELECT  pgr_analyzeGraph('mytable',0.001,source:='src',id:='gid',target:='tgt',the_geom:='mygeom',rows_where:='gid < 10');
WARNING:  pgr_analyzegraph(text,double precision,text,text,text,text,text) deprecated function on v3.8.0
NOTICE:  PROCESSING:
NOTICE:  pgr_analyzeGraph('mytable',0.001,'mygeom','gid','src','tgt','gid < 10')
NOTICE:  Performing checks, please wait ...
NOTICE:  Analyzing for dead ends. Please wait...
NOTICE:  Analyzing for gaps. Please wait...
NOTICE:  Analyzing for isolated edges. Please wait...
NOTICE:  Analyzing for ring geometries. Please wait...
NOTICE:  Analyzing for intersections. Please wait...
NOTICE:              ANALYSIS RESULTS FOR SELECTED EDGES:
NOTICE:                    Isolated segments: 0
NOTICE:                            Dead ends: 4
NOTICE:  Potential gaps found near dead ends: 0
NOTICE:               Intersections detected: 0
NOTICE:                      Ring geometries: 0
 pgr_analyzegraph
------------------
 OK
(1 row)

Selecting the rows WHERE the geometry is near the geometry of row with id =5 .

SELECT  pgr_analyzeGraph('mytable',0.001,'mygeom','gid','src','tgt',
    rows_where:='mygeom && (SELECT st_buffer(mygeom,1) FROM mytable WHERE gid=5)');
WARNING:  pgr_analyzegraph(text,double precision,text,text,text,text,text) deprecated function on v3.8.0
NOTICE:  PROCESSING:
NOTICE:  pgr_analyzeGraph('mytable',0.001,'mygeom','gid','src','tgt','mygeom && (SELECT st_buffer(mygeom,1) FROM mytable WHERE gid=5)')
NOTICE:  Performing checks, please wait ...
NOTICE:  Analyzing for dead ends. Please wait...
NOTICE:  Analyzing for gaps. Please wait...
NOTICE:  Analyzing for isolated edges. Please wait...
NOTICE:  Analyzing for ring geometries. Please wait...
NOTICE:  Analyzing for intersections. Please wait...
NOTICE:              ANALYSIS RESULTS FOR SELECTED EDGES:
NOTICE:                    Isolated segments: 1
NOTICE:                            Dead ends: 5
NOTICE:  Potential gaps found near dead ends: 0
NOTICE:               Intersections detected: 1
NOTICE:                      Ring geometries: 0
 pgr_analyzegraph
------------------
 OK
(1 row)


SELECT  pgr_analyzeGraph('mytable',0.001,source:='src',id:='gid',target:='tgt',the_geom:='mygeom',
    rows_where:='mygeom && (SELECT st_buffer(mygeom,1) FROM mytable WHERE gid=5)');
WARNING:  pgr_analyzegraph(text,double precision,text,text,text,text,text) deprecated function on v3.8.0
NOTICE:  PROCESSING:
NOTICE:  pgr_analyzeGraph('mytable',0.001,'mygeom','gid','src','tgt','mygeom && (SELECT st_buffer(mygeom,1) FROM mytable WHERE gid=5)')
NOTICE:  Performing checks, please wait ...
NOTICE:  Analyzing for dead ends. Please wait...
NOTICE:  Analyzing for gaps. Please wait...
NOTICE:  Analyzing for isolated edges. Please wait...
NOTICE:  Analyzing for ring geometries. Please wait...
NOTICE:  Analyzing for intersections. Please wait...
NOTICE:              ANALYSIS RESULTS FOR SELECTED EDGES:
NOTICE:                    Isolated segments: 1
NOTICE:                            Dead ends: 5
NOTICE:  Potential gaps found near dead ends: 0
NOTICE:               Intersections detected: 1
NOTICE:                      Ring geometries: 0
 pgr_analyzegraph
------------------
 OK
(1 row)

Selecting the rows WHERE the geometry is near the place=’myhouse’ of the table othertable. (note the use of quote_literal)

DROP TABLE IF EXISTS otherTable;
DROP TABLE
CREATE TABLE otherTable AS  (SELECT 'myhouse'::text AS place, st_point(2.5,2.5) AS other_geom) ;
SELECT 1
SELECT  pgr_analyzeGraph('mytable',0.001,'mygeom','gid','src','tgt',
    rows_where:='mygeom && (SELECT st_buffer(other_geom,1) FROM otherTable WHERE place='||quote_literal('myhouse')||')');
WARNING:  pgr_analyzegraph(text,double precision,text,text,text,text,text) deprecated function on v3.8.0
NOTICE:  PROCESSING:
NOTICE:  pgr_analyzeGraph('mytable',0.001,'mygeom','gid','src','tgt','mygeom && (SELECT st_buffer(other_geom,1) FROM otherTable WHERE place='myhouse')')
NOTICE:  Performing checks, please wait ...
NOTICE:  Analyzing for dead ends. Please wait...
NOTICE:  Analyzing for gaps. Please wait...
NOTICE:  Analyzing for isolated edges. Please wait...
NOTICE:  Analyzing for ring geometries. Please wait...
NOTICE:  Analyzing for intersections. Please wait...
NOTICE:              ANALYSIS RESULTS FOR SELECTED EDGES:
NOTICE:                    Isolated segments: 2
NOTICE:                            Dead ends: 10
NOTICE:  Potential gaps found near dead ends: 1
NOTICE:               Intersections detected: 1
NOTICE:                      Ring geometries: 0
 pgr_analyzegraph
------------------
 OK
(1 row)


SELECT  pgr_analyzeGraph('mytable',0.001,source:='src',id:='gid',target:='tgt',the_geom:='mygeom',
    rows_where:='mygeom && (SELECT st_buffer(other_geom,1) FROM otherTable WHERE place='||quote_literal('myhouse')||')');
WARNING:  pgr_analyzegraph(text,double precision,text,text,text,text,text) deprecated function on v3.8.0
NOTICE:  PROCESSING:
NOTICE:  pgr_analyzeGraph('mytable',0.001,'mygeom','gid','src','tgt','mygeom && (SELECT st_buffer(other_geom,1) FROM otherTable WHERE place='myhouse')')
NOTICE:  Performing checks, please wait ...
NOTICE:  Analyzing for dead ends. Please wait...
NOTICE:  Analyzing for gaps. Please wait...
NOTICE:  Analyzing for isolated edges. Please wait...
NOTICE:  Analyzing for ring geometries. Please wait...
NOTICE:  Analyzing for intersections. Please wait...
NOTICE:              ANALYSIS RESULTS FOR SELECTED EDGES:
NOTICE:                    Isolated segments: 2
NOTICE:                            Dead ends: 10
NOTICE:  Potential gaps found near dead ends: 1
NOTICE:               Intersections detected: 1
NOTICE:                      Ring geometries: 0
 pgr_analyzegraph
------------------
 OK
(1 row)

Additional Examples

UPDATE edges_vertices_pgr SET (cnt,chk) = (0,0);
UPDATE 17
SELECT pgr_analyzeGraph('edges', 0.001, 'geom');
WARNING:  pgr_analyzegraph(text,double precision,text,text,text,text,text) deprecated function on v3.8.0
NOTICE:  PROCESSING:
NOTICE:  pgr_analyzeGraph('edges',0.001,'geom','id','source','target','true')
NOTICE:  Performing checks, please wait ...
NOTICE:  Analyzing for dead ends. Please wait...
NOTICE:  Analyzing for gaps. Please wait...
NOTICE:  Analyzing for isolated edges. Please wait...
NOTICE:  Analyzing for ring geometries. Please wait...
NOTICE:  Analyzing for intersections. Please wait...
NOTICE:              ANALYSIS RESULTS FOR SELECTED EDGES:
NOTICE:                    Isolated segments: 2
NOTICE:                            Dead ends: 7
NOTICE:  Potential gaps found near dead ends: 1
NOTICE:               Intersections detected: 1
NOTICE:                      Ring geometries: 0
 pgr_analyzegraph
------------------
 OK
(1 row)


SELECT  pgr_analyzeGraph('edges',0.001,'geom', rows_where:='id < 10');
WARNING:  pgr_analyzegraph(text,double precision,text,text,text,text,text) deprecated function on v3.8.0
NOTICE:  PROCESSING:
NOTICE:  pgr_analyzeGraph('edges',0.001,'geom','id','source','target','id < 10')
NOTICE:  Performing checks, please wait ...
NOTICE:  Analyzing for dead ends. Please wait...
NOTICE:  Analyzing for gaps. Please wait...
NOTICE:  Analyzing for isolated edges. Please wait...
NOTICE:  Analyzing for ring geometries. Please wait...
NOTICE:  Analyzing for intersections. Please wait...
NOTICE:              ANALYSIS RESULTS FOR SELECTED EDGES:
NOTICE:                    Isolated segments: 0
NOTICE:                            Dead ends: 4
NOTICE:  Potential gaps found near dead ends: 0
NOTICE:               Intersections detected: 0
NOTICE:                      Ring geometries: 0
 pgr_analyzegraph
------------------
 OK
(1 row)


SELECT  pgr_analyzeGraph('edges',0.001,'geom', rows_where:='id >= 10');
WARNING:  pgr_analyzegraph(text,double precision,text,text,text,text,text) deprecated function on v3.8.0
NOTICE:  PROCESSING:
NOTICE:  pgr_analyzeGraph('edges',0.001,'geom','id','source','target','id >= 10')
NOTICE:  Performing checks, please wait ...
NOTICE:  Analyzing for dead ends. Please wait...
NOTICE:  Analyzing for gaps. Please wait...
NOTICE:  Analyzing for isolated edges. Please wait...
NOTICE:  Analyzing for ring geometries. Please wait...
NOTICE:  Analyzing for intersections. Please wait...
NOTICE:              ANALYSIS RESULTS FOR SELECTED EDGES:
NOTICE:                    Isolated segments: 2
NOTICE:                            Dead ends: 8
NOTICE:  Potential gaps found near dead ends: 1
NOTICE:               Intersections detected: 1
NOTICE:                      Ring geometries: 0
 pgr_analyzegraph
------------------
 OK
(1 row)


SELECT  pgr_analyzeGraph('edges',0.001,'geom', rows_where:='id < 17');
WARNING:  pgr_analyzegraph(text,double precision,text,text,text,text,text) deprecated function on v3.8.0
NOTICE:  PROCESSING:
NOTICE:  pgr_analyzeGraph('edges',0.001,'geom','id','source','target','id < 17')
NOTICE:  Performing checks, please wait ...
NOTICE:  Analyzing for dead ends. Please wait...
NOTICE:  Analyzing for gaps. Please wait...
NOTICE:  Analyzing for isolated edges. Please wait...
NOTICE:  Analyzing for ring geometries. Please wait...
NOTICE:  Analyzing for intersections. Please wait...
NOTICE:              ANALYSIS RESULTS FOR SELECTED EDGES:
NOTICE:                    Isolated segments: 0
NOTICE:                            Dead ends: 3
NOTICE:  Potential gaps found near dead ends: 0
NOTICE:               Intersections detected: 0
NOTICE:                      Ring geometries: 0
 pgr_analyzegraph
------------------
 OK
(1 row)


DELETE FROM edges WHERE id >= 17;
DELETE 2
UPDATE edges_vertices_pgr SET (cnt,chk) = (0,0);
UPDATE 17

SELECT pgr_analyzeGraph('edges', 0.001, 'geom');
WARNING:  pgr_analyzegraph(text,double precision,text,text,text,text,text) deprecated function on v3.8.0
NOTICE:  PROCESSING:
NOTICE:  pgr_analyzeGraph('edges',0.001,'geom','id','source','target','true')
NOTICE:  Performing checks, please wait ...
NOTICE:  Analyzing for dead ends. Please wait...
NOTICE:  Analyzing for gaps. Please wait...
NOTICE:  Analyzing for isolated edges. Please wait...
NOTICE:  Analyzing for ring geometries. Please wait...
NOTICE:  Analyzing for intersections. Please wait...
NOTICE:              ANALYSIS RESULTS FOR SELECTED EDGES:
NOTICE:                    Isolated segments: 0
NOTICE:                            Dead ends: 3
NOTICE:  Potential gaps found near dead ends: 0
NOTICE:               Intersections detected: 0
NOTICE:                      Ring geometries: 0
 pgr_analyzegraph
------------------
 OK
(1 row)

See Also

Indices and tables