pggeodb.nancy.inra.fr/db_robot - db_robot on pggeodb.nancy.inra.fr

Function: _add_raster_constraint_num_bands

Schema

public

Owner

albenard

Descriptions

There is no description for function _add_raster_constraint_num_bands

Options

Definition

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

cn := 'enforce_num_bands_' || $3;

sql := 'SELECT public.st_numbands(' || quote_ident($3)
|| ') FROM ' || fqtn
|| ' LIMIT 1';
BEGIN
EXECUTE sql INTO attr;
EXCEPTION WHEN OTHERS THEN
RAISE NOTICE 'Unable to get the number of bands of a sample raster: % (%)',
       SQLERRM, SQLSTATE;
RETURN FALSE;
END;

sql := 'ALTER TABLE ' || fqtn
|| ' ADD CONSTRAINT ' || quote_ident(cn)
|| ' CHECK (public.st_numbands(' || quote_ident($3)
|| ') = ' || attr
|| ')';
RETURN  public._add_raster_constraint(cn, sql);
END;
$span$
LANGUAGE 'plpgsql'
VOLATILE
RETURNS NULL ON NULL INPUT
SECURITY INVOKER
COST 100;

This file was generated with SQL Manager for PostgreSQL (www.pgsqlmanager.com) at 26/02/2014 11:51