[FLINK-20862] Add a converter from TypeInformation to DataType

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.13.0
• Component/s: Table SQL / API
• Labels: pull-request-available
• Assignee: Timo Walther
• Reporter: Timo Walther
• Created: 06/Jan/21 09:00
• Updated: 28/May/21 07:10
• Resolved: 18/Jan/21 14:21

Description

Implement a new TypeInfoDataTypeConverter that will no longer produce LegacyTypeInformationType.

As mentioned in the FLIP:

• All types from DataStream API should be supported by this converter.
• TupleTypeInfoBase will be translated into a proper RowType or StructuredType.
• BigDecimals will be converted to DECIMAL(38,18) by default.
• Composite types (tuples, POJOs, rows) will be flattened by default if they are used as top-level records (similar to the old behavior).
• The order of POJO field's is determined by the DataTypeExtractor and must not be defined manually anymore.
• GenericTypeInfo is converted to RawType immediately by considering the current configuration.
• A DataStream that originated from Table API will keep its DataType information due to ExternalTypeInfo implementing DataTypeQueryable.

Issue Links

• links to: GitHub Pull Request #14619