st_aswkb

info

Visualização

Este recurso está em Pré-visualização Pública.

Retorna o valor de Geografia ou Geometria inserido no formato WKB.

Para a função Databricks SQL correspondente, consulte a funçãost_aswkb.

Sintaxe

Python

from pyspark.databricks.sql import functions as dbf

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

Parâmetros

Parâmetro	Tipo	Descrição
col1	pyspark.sql.Column ou str	Um valor geoespacial, seja Geografia ou Geometria.
col2	pyspark.sql.Column ou str, opcional	A ordem dos bytes (endianness) opcional do WKB de saída, NDR para little-endian (default) ou XDR para big-endian.

Exemplos

Python

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()

Output

[Row(result='010200000002000000000000000000F03F000000000000004000000000000008400000000000001040')]

Python

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()

Output

[Row(result='010200000002000000000000000000F03F000000000000004000000000000008400000000000001040')]

Python

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()

Output

[Row(result='0000000002000000023FF0000000000000400000000000000040080000000000004010000000000000')]