st_aswkb

Importante

Esta característica está en versión preliminar pública.

Devuelve el valor Geography o Geometry de entrada en formato WKB.

Para obtener la función SQL de Databricks correspondiente, consulte st_aswkb function.

Syntax

from pyspark.databricks.sql import functions as dbf

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

Parámetros

Parámetro	Tipo	Description
col1	pyspark.sql.Column o str	Un valor geoespacial, ya sea Geografía o Geometría.
col2	pyspark.sql.Column o str, opcional	La endianidad opcional del WKB de salida, NDR para little-endian (valor predeterminado) o XDR para big-endian.

Examples

from pyspark.databricks.sql import functions as dbf
from pyspark.sql.functions import hex
df = spark.createDataFrame([('LINESTRING(1 2,3 4)',)], ['wkt'])
df.select(hex(dbf.st_aswkb(dbf.st_geogfromtext('wkt'))).alias('result')).collect()

[Row(result='010200000002000000000000000000F03F000000000000004000000000000008400000000000001040')]

from pyspark.databricks.sql import functions as dbf
from pyspark.sql.functions import hex
df = spark.createDataFrame([('LINESTRING(1 2,3 4)', 'NDR',)], ['wkt', 'e'])
df.select(hex(dbf.st_aswkb(dbf.st_geogfromtext('wkt'), df.e)).alias('result')).collect()

[Row(result='010200000002000000000000000000F03F000000000000004000000000000008400000000000001040')]

from pyspark.databricks.sql import functions as dbf
from pyspark.sql.functions import hex
df = spark.createDataFrame([('LINESTRING(1 2,3 4)',)], ['wkt'])
df.select(hex(dbf.st_aswkb(dbf.st_geogfromtext('wkt'), 'XDR')).alias('result')).collect()

[Row(result='0000000002000000023FF0000000000000400000000000000040080000000000004010000000000000')]