pyflink.table.expression.Expression.try_cast#

Expression.try_cast(data_type: DataType) → Expression[source]#

Like cast, but in case of error, returns NULL rather than failing the job.

E.g. lit(“42”).try_cast(DataTypes.INT()) returns 42; lit(null).try_cast(DataTypes.STRING()) returns NULL of type STRING; lit(“non-number”).cast(DataTypes.INT()) returns NULL of type INT. coalesce(lit(“non-number”).cast(DataTypes.INT()), lit(0)) returns 0 of type INT.