map_contains_key

Haritada anahtar varsa true döner.

Sözdizimi

from pyspark.sql import functions as sf

sf.map_contains_key(col, value)

Parametreler

Parametre	Türü	Description
col	pyspark.sql.Column veya str	Sütunun adı veya eşlemeyi temsil eden bir ifade.
value	Herhangi biri	Değişmez değer veya Sütun ifadesi.

İade

pyspark.sql.Column: Anahtar haritadaysa true, aksi takdirde False.

Örnekler

Örnek 1: Anahtar haritadadır

from pyspark.sql import functions as sf
df = spark.sql("SELECT map(1, 'a', 2, 'b') as data")
df.select(sf.map_contains_key("data", 1)).show()

+-------------------------+
|map_contains_key(data, 1)|
+-------------------------+
|                     true|
+-------------------------+

Örnek 2: Anahtar haritada değil

from pyspark.sql import functions as sf
df = spark.sql("SELECT map(1, 'a', 2, 'b') as data")
df.select(sf.map_contains_key("data", -1)).show()

+--------------------------+
|map_contains_key(data, -1)|
+--------------------------+
|                     false|
+--------------------------+

Örnek 3: Sütun kullanarak anahtarı denetleme

from pyspark.sql import functions as sf
df = spark.sql("SELECT map(1, 'a', 2, 'b') as data, 1 as key")
df.select(sf.map_contains_key("data", sf.col("key"))).show()

+---------------------------+
|map_contains_key(data, key)|
+---------------------------+
|                       true|
+---------------------------+