substr (Column)

Return a substring of the column.

Syntax

substr(startPos, length)

Parameters

Returns

Column

Examples

Example 1: Using integers for the input arguments.

df = spark.createDataFrame(
     [(2, "Alice"), (5, "Bob")], ["age", "name"])
df.select(df.name.substr(1, 3).alias("col")).collect()

# [Row(col='Ali'), Row(col='Bob')]

Example 2: Using columns for the input arguments.

df = spark.createDataFrame(
     [(3, 4, "Alice"), (2, 3, "Bob")], ["sidx", "eidx", "name"])
df.select(df.name.substr(df.sidx, df.eidx).alias("col")).collect()

# [Row(col='ice'), Row(col='ob')]