Hi Dawid,
I added `*bridgedTo = Map.class*` as you suggested and got a slightly
different exception. I also tried passing a rawSerializer (an
implementation similar to MapSerializer[1] with String type key and value)
but got the same exception as without it. I am using Flink v1.11 for
reference.
@FunctionHint(
input = {
@DataTypeHint(value="RAW", bridgedTo=Map.class,
rawSerializer=MyMapSerializer.class),
@DataTypeHint("STRING")
},
output = @DataTypeHint("STRING")
)
public static String eval(final Object map, final String key)
*Exception:*
Caused by: org.apache.flink.table.api.ValidationException: Invalid input
arguments. Expected signatures are:
MAP_VALUE(RAW('java.util.Map', '...'), 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)
... 49 more
Caused by: org.apache.flink.table.api.ValidationException: Invalid argument
type at position 0. Data type RAW('java.util.Map', '...') 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)
... 50 more
[1]
https://github.com/apache/flink/blob/release-1.11.0/flink-core/src/main/java/org/apache/flink/api/common/typeutils/base/MapSerializer.java
On Tue, Oct 27, 2020 at 6:13 AM Dawid Wysakowicz <dwysakow...@apache.org>
wrote:
> Hey Steve,
>
> You should be able to do via the bridgedTo parameter. You can additionally
> specify a serializer you want to use via rawSerializer parameter:
>
> @FunctionHint(
> input = {
> @DataTypeHint(value = "RAW", bridgedTo =
> Map.class[, rawSerializer = ... ]),
> @DataTypeHint("STRING")},
> output = @DataTypeHint("STRING")
> )
> public static String eval(final Object map, final String key)
>
> Best,
>
> Dawid
> On 26/10/2020 16:10, Steve Whelan 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
>
>
