Jingsong Lee created FLINK-15038:
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Summary: Get field DataType of TableSchema should return DataType
with default conversion class
Key: FLINK-15038
URL: https://issues.apache.org/jira/browse/FLINK-15038
Project: Flink
Issue Type: Bug
Components: Table SQL / API
Reporter: Jingsong Lee
Fix For: 1.10.0
Now, the user and planner construct TableSchema with various DataTypes, them
maybe have various conversion classes.
For example, return DataType of Functions maybe with various TypeInformations
and lead to various conversion classes.
TableSchema should only have logical informations instead of various conversion
classes.
This ticket want to clean the field DataType in TableSchema and return a
consistent conversion classes to users.
Modify:
getFieldDataTypes/getFieldDataType/toRowDataType in TableSchema.
Before return, we can bridgeTo default conversion class using
TypeConversions.fromLogicalToDataType(type.getLogicalType()).
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