Jark Wu created FLINK-14321:
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Summary: Support to parse watermark statement in SQL DDL
Key: FLINK-14321
URL: https://issues.apache.org/jira/browse/FLINK-14321
Project: Flink
Issue Type: Sub-task
Components: Table SQL / API
Reporter: Jark Wu
Assignee: Jark Wu
Support to parse watermark syntax in SQL DDL. This can implemented in
{{flink-sql-parser}} module.
The watermark syntax is as following:
{{WATERMARK FOR columnName AS <watermark_strategy_expression>}}
We should also do some validation during parsing, for example, whether the
referenced rowtime field exist. We should also support to reference a nested
field as the rowtime field.
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