Hi Steve,
Thanks for reaching out to the Flink community. I am pulling in Timo who
might be able to help you with this question.
Best,
Jark
On Mon, 26 Oct 2020 at 23:10, Steve Whelan <swhe...@jwplayer.com> wrote:
> Hi,
>
> I have a column of type *RAW('java.util.Map', ?)* that I want to pass to
> a scalar function UDF. I'm using DataTypeHints but hitting an exception.
> What would be the proper DataTypeHint and data type param to achieve this?
>
> @FunctionHint(
> input = {@DataTypeHint("RAW"), @DataTypeHint("STRING")},
> output = @DataTypeHint("STRING")
> )
> public static String eval(final Object map, final String key) {
> // business logic
> }
>
>
> *Exception:*
>
> Caused by: org.apache.flink.table.api.ValidationException: Invalid input
> arguments. Expected signatures are:
> MAP_VALUE(RAW('java.lang.Object', '...'), STRING)
> at
> org.apache.flink.table.types.inference.TypeInferenceUtil.createInvalidInputException(TypeInferenceUtil.java:190)
> at
> org.apache.flink.table.planner.functions.inference.TypeInferenceOperandChecker.checkOperandTypesOrError(TypeInferenceOperandChecker.java:131)
> at
> org.apache.flink.table.planner.functions.inference.TypeInferenceOperandChecker.checkOperandTypes(TypeInferenceOperandChecker.java:89)
> ... 50 more
> Caused by: org.apache.flink.table.api.ValidationException: Invalid
> argument type at position 0. Data type RAW('java.lang.Object', '...')
> expected but RAW('java.util.Map', ?) passed.
> at
> org.apache.flink.table.types.inference.TypeInferenceUtil.adaptArguments(TypeInferenceUtil.java:137)
> at
> org.apache.flink.table.types.inference.TypeInferenceUtil.adaptArguments(TypeInferenceUtil.java:102)
> at
> org.apache.flink.table.planner.functions.inference.TypeInferenceOperandChecker.checkOperandTypesOrError(TypeInferenceOperandChecker.java:126)
> ... 51 more
>
>
> Thank you,
>
> Steve
>
