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
