st_geometryn

Penting

Fitur ini ada di Pratinjau Umum.

Mengembalikan elemen n-th berbasis 1 dari multi geometri input, atau None jika tidak ada.

Untuk fungsi Databricks SQL yang sesuai, lihat st_geometryn fungsi.

Syntax

from pyspark.databricks.sql import functions as dbf

dbf.st_geometryn(col1=<col1>, col2=<col2>)

Parameter-parameternya

Pengaturan	Tipe	Description
col1	pyspark.sql.Column atau str	Nilai Geometri.
col2	pyspark.sql.Column atau int	Indeks berbasis 1 geometri yang akan dikembalikan.

Examples

from pyspark.databricks.sql import functions as dbf
df = spark.createDataFrame([('GEOMETRYCOLLECTION(POINT(4 5),LINESTRING(10 3,24 37,44 85))',)], ['wkt'])
df.select(dbf.st_asewkt(dbf.st_geometryn(dbf.st_geomfromtext('wkt', 4326), 2)).alias('result')).collect()

[Row(result='SRID=4326;LINESTRING(10 3,24 37,44 85)')]

from pyspark.databricks.sql import functions as dbf
df = spark.createDataFrame([('MULTIPOLYGON(EMPTY,((0 0,10 0,0 10,0 0),(1 1,9 1,1 9,1 1)))',)], ['wkt'])
df.select(dbf.st_asewkt(dbf.st_geometryn(dbf.st_geomfromtext('wkt'), 2)).alias('result')).collect()

[Row(result='POLYGON((0 0,10 0,0 10,0 0),(1 1,9 1,1 9,1 1))')]

from pyspark.databricks.sql import functions as dbf
df = spark.createDataFrame([('POINT(1 2)',)], ['wkt'])
df.select(dbf.st_asewkt(dbf.st_geometryn(dbf.st_geomfromtext('wkt'), 1)).alias('result')).collect()

[Row(result='POINT(1 2)')]