Jesus Camacho Rodriguez created CALCITE-2673:
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Summary: SqlDialect supports pushing of all functions by default
Key: CALCITE-2673
URL: https://issues.apache.org/jira/browse/CALCITE-2673
Project: Calcite
Issue Type: Improvement
Components: core
Reporter: Jesus Camacho Rodriguez
Assignee: Jesus Camacho Rodriguez
Fix For: 1.18.0
SqlDialect contains a 'supportsFunction' that can be used by rules to know
whether a certain function is supported in the given dialect, e.g., to choose
whether to push a Filter expression to JDBC, etc.
The default implementation of 'supportsFunction' always returns true.
I believe a better idea would be to support in the default implementation for
the method the most common SQL functions. Then each dialect can override that
behavior and expand/limit the supported functions, e.g., JethroDataDialect
already does that.
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