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st_asewkb

Importante

Esse recurso está em Visualização Pública.

Retorna o valor de entrada Geometry no formato EWKB.

Para consultar a função SQL correspondente do Databricks, veja st_asewkb função.

Sintaxe

from pyspark.databricks.sql import functions as dbf

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

Parâmetros

Parâmetro Tipo Description
col1 pyspark.sql.Column ou str Um valor de Geometry.
col2 pyspark.sql.Column ou str, opcional A endianidade opcional do EWKB de saída, NDR para little-endian (padrão) ou XDR para big-endian.

Exemplos

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_asewkb(dbf.st_geomfromtext('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_asewkb(dbf.st_geomfromtext('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_asewkb(dbf.st_geomfromtext('wkt'), 'XDR')).alias('result')).collect()

[Row(result='0000000002000000023FF0000000000000400000000000000040080000000000004010000000000000')]
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