[jira] [Created] (FLINK-12799) Improve expression based TableSchema extraction from DataStream/DataSet

[Shang Yuanchun (Jira)]

Dawid Wysakowicz created FLINK-12799:
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             Summary: Improve expression based TableSchema extraction from DataStream/DataSet
                 Key: FLINK-12799
                 URL: https://issues.apache.org/jira/browse/FLINK-12799
             Project: Flink
          Issue Type: Sub-task
            Reporter: Dawid Wysakowicz
            Assignee: Dawid Wysakowicz
             Fix For: 1.9.0


We should improve the extraction of {{TableSchema}} from {{DataStream/DataSet}}. Currently it is split into two stages:
# We extract types ignoring time attributes via {{FieldInfoUtils#getFieldInfo}}
# We extract rowtime and proctime positions via {{StreamTableEnvImpl#validateAndExtractTimeAttributes}}
# We adjust indices from #1 using information from #2

All that could happen in a single pass. This will also deal with porting/removing few methods from {{StreamTableEnvImpl}}.



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