Rui Wang created BEAM-9969:
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Summary: Beam ZetaSQL supports pure SQL user-defined table
functions
Key: BEAM-9969
URL: https://issues.apache.org/jira/browse/BEAM-9969
Project: Beam
Issue Type: Task
Components: dsl-sql-zetasql
Reporter: Rui Wang
There are three types of implementation of table-valued function:
1. FixedSchemaOutput. The output of the TVF is pre-defined.
2. InputSchemaForwardToOutput. The output schema of the TVF is the same as
input schema.
3. InputSchemaForwardToOutputWithAppendedColumns. The output schema of the TVF
is the same as input schema plus columns appended.
4. TemplatedTVF. Parameters of TVF are templated. (e.g. ANY TYPE, ANY TABLE,
etc.)
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