ST_CoordDim retorna as dimensões coordenadas do valor ST_Geometry. Para obter uma explicação sobre as dimensões coordenadas, consulte o Pontos.
Sintaxe
db2gse.ST_CoordDim(g1 db2gse.ST_Geometry)
Tipo de retorno
Inteiro
Exemplos
A tabela coorddim_test é criada com as colunas geotype e g1. A coluna geotype armazena o nome da subclasse de figura geométrica armazenada na coluna de figura geométrica g1.
CREATE TABLE coorddim_test (geotype varchar(20), g1 db2gse.ST_Geometry)
As instruções INSERT inserem uma subclasse de amostra na tabela coorddim_test.
INSERT INTO coorddim_test VALUES( 'Point', db2gse.ST_PointFromText('point (10.02 20.01)', db2gse.coordref()..srid(0)) ) INSERT INTO coorddim_test VALUES( 'Linestring', db2gse.ST_LineFromText('linestring (10.02 20.01,10.32 23.98,11.92 25.64)', db2gse.coordref()..srid(0)) ) INSERT INTO coorddim_test VALUES( 'Polygon', db2gse.ST_PolyFromText('polygon ((10.02 20.01,11.92 35.64, 25.02 34.15, 19.15 33.94,10.02 20.01))', db2gse.coordref()..srid(0)) ) INSERT INTO coorddim_test VALUES( 'Multipoint', db2gse.ST_MPointFromText('multipoint (10.02 20.01,10.32 23.98, 11.92 25.64)', db2gse.coordref()..srid(0)) ) INSERT INTO coorddim_test VALUES( 'Multilinestring', db2gse.ST_MLineFromText('multilinestring ((10.02 20.01, 10.32 23.98,11.92 25.64),(9.55 23.75,15.36 30.11))', db2gse.coordref()..srid(0)) ) INSERT INTO coorddim_test VALUES( 'Multipolygon', MPolyFromText('multipolygon (((10.02 20.01,11.92 35.64,25.02 34.15, 19.15 33.94,10.02 20.01)),((51.71 21.73,73.36 27.04,71.52 32.87, 52.43 31.90,51.71 21.73)))', db2gse.coordref()..srid(0)) )
A instrução SELECT relaciona o nome da subclasse armazenada na coluna geotype à dimensão coordenada desse geotype.
SELECT geotype, db2gse.ST_coordDim(g1)' coordinate_dimension' FROM coorddim_test GEOTYPE coordinate_dimension -------------------- -------------------------- ST_Point 2 ST_Linestring 2 ST_Polygon 2 ST_Multipoint 2 ST_Multilinestring 2 ST_Multipolygon 2 6 record(s) selected.