wuchong commented on a change in pull request #11538: [FLINK-16813][jdbc]
JDBCInputFormat doesn't correctly map Short
URL: https://github.com/apache/flink/pull/11538#discussion_r401435369
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File path:
flink-connectors/flink-jdbc/src/main/java/org/apache/flink/api/java/io/jdbc/JDBCInputFormat.java
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@@ -127,7 +134,7 @@ public JDBCInputFormat() {
@Override
public RowTypeInfo getProducedType() {
- return rowTypeInfo;
+ return (RowTypeInfo)
fromDataTypeToLegacyInfo(fromLogicalToDataType(rowType));
Review comment:
Yes. They are orthogonal. The reason we should use `TypeInformation` instead
of `RowType` is `InputFormat` only works with `TypeInformation` and `RowType`
is a concept of table world.
The community is trying to reuse runtime implementation as much as possible.
So a better design is that `JDBCInputFormat` accepts result `TypeInformation`
and `JDBCConverter` as constructor parameters. So that, we can easily support
generic type for DataStream users in the futrue. We already refactored JDBC
sink function to support generic type (see `JdbcBatchingOutputFormat`), and
will refactor JDBC source soon.
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