try_subtract

Mengembalikan left-right dan hasilnya null pada overflow. Jenis input yang dapat diterima sama dengan - operator. Mendukung Spark Connect.

Untuk fungsi Databricks SQL yang sesuai, lihat try_subtract fungsi.

Syntax

from pyspark.databricks.sql import functions as dbf

dbf.try_subtract(left=<left>, right=<right>)

Parameter-parameternya

Pengaturan	Tipe	Description
left	pyspark.sql.Column or column name
right	pyspark.sql.Column or column name

Examples

from pyspark.databricks.sql import functions as dbf
spark.createDataFrame(
    [(1982, 15), (1990, 2)], ["birth", "age"]
).select("*", dbf.try_subtract("birth", "age")).show()

+-----+---+------------------------+
|birth|age|try_subtract(birth, age)|
+-----+---+------------------------+
| 1982| 15|                    1967|
| 1990|  2|                    1988|
+-----+---+------------------------+

from pyspark.databricks.sql import functions as dbf
spark.sql(
    "SELECT * FROM VALUES (DATE('2015-10-01')) AS TAB(date)"
).select("*", dbf.try_subtract("date", dbf.lit(1))).show()

+----------+---------------------+
|      date|try_subtract(date, 1)|
+----------+---------------------+
|2015-10-01|           2015-09-30|
+----------+---------------------+