pggeodb-preprod.nancy.inra.fr/db_onf_gde - db_onf_gde on pggeodb-preprod.nancy.inra.fr

Function: _add_raster_constraint_extent

Schema

public

Owner

postgres

Descriptions

There is no description for function _add_raster_constraint_extent

Options

Definition

CREATE OR REPLACE FUNCTION public._add_raster_constraint_extent (
 rastschema name,
 rasttable name,
 rastcolumn name
)
RETURNS boolean AS
$span$
DECLARE
fqtn text;
cn name;
sql text;
attr text; srid integer;
BEGIN
fqtn := '';
IF length($1) > 0 THEN
fqtn := quote_ident($1) || '.';
END IF;
fqtn := fqtn || quote_ident($2);

sql := 'SELECT public.ST_SRID('
           || quote_ident($3)
     || ') FROM '
           || fqtn
           || ' LIMIT 1;';
   EXECUTE sql INTO srid;
   
cn := 'enforce_max_extent_' || $3;

sql := 'SELECT public.st_ashexewkb( public.st_setsrid( public.st_extent( public.st_envelope('
|| quote_ident($3)
|| ')), ' || srid || ')) FROM '
|| fqtn;
EXECUTE sql INTO attr;

-- NOTE: I put NOT VALID to prevent the costly step of validating the constraint
sql := 'ALTER TABLE ' || fqtn
|| ' ADD CONSTRAINT ' || quote_ident(cn)
|| ' CHECK ( public.st_envelope('
|| quote_ident($3)
|| ') @ ''' || attr || '''::geometry) NOT VALID';
RETURN  public._add_raster_constraint(cn, sql);
END;
$span$
LANGUAGE 'plpgsql'
VOLATILE
RETURNS NULL ON NULL INPUT
SECURITY INVOKER
COST 9000;

This file was generated with SQL Manager for PostgreSQL (www.pgsqlmanager.com) at 07/12/2018 13:23