pyspark.sql.functions.array_join¶
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pyspark.sql.functions.array_join(col: ColumnOrName, delimiter: str, null_replacement: Optional[str] = None) → pyspark.sql.column.Column¶ Concatenates the elements of column using the delimiter. Null values are replaced with null_replacement if set, otherwise they are ignored.
Examples
>>> df = spark.createDataFrame([(["a", "b", "c"],), (["a", None],)], ['data']) >>> df.select(array_join(df.data, ",").alias("joined")).collect() [Row(joined='a,b,c'), Row(joined='a')] >>> df.select(array_join(df.data, ",", "NULL").alias("joined")).collect() [Row(joined='a,b,c'), Row(joined='a,NULL')]