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https://issues.apache.org/jira/browse/CALCITE-2670?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hongze Zhang updated CALCITE-2670:
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Issue Type: Sub-task (was: Improvement)
Parent: CALCITE-2867
> Combine similar JSON aggregate functions in operator table
> ----------------------------------------------------------
>
> Key: CALCITE-2670
> URL: https://issues.apache.org/jira/browse/CALCITE-2670
> Project: Calcite
> Issue Type: Sub-task
> Components: core
> Reporter: Hongze Zhang
> Assignee: Julian Hyde
> Priority: Major
> Fix For: 1.18.0
>
>
> In current code master of Calcite, operator *JSON_ARRAYAGG* and
> *JSON_OBJECTAGG* are separated to *JSON_ARRAYAGG_NULL_ON_NULL*,
> *JSON_ARRAYAGG_ABSENT_ON_NULL*, *JSON_OBJECTAGG_NULL_ON_NULL* and
> *JSON_OBJECTAGG_ABSENT_ON_NULL* in SqlStdOperatorTable.java. This is OK for
> now, but may deliver more difficulty on extending syntax of *JSON_ARRAYAGG*
> and *JSON_OBJECTAGG* and on implementing logical plan by adapters.
> This is basically to combine the 4 operators to 2, this is a improvement list:
> # Combine *JSON_ARRAYAGG_NULL_ON_NULL* and *JSON_ARRAYAGG_ABSENT_ON_NULL;*
> # Combine *JSON_OBJECTAGG_NULL_ON_NULL* and *JSON_OBJECTAGG_ABSENT_ON_NULL;*
> # *SYMBOL* type Support for *JavaTypeFactoryImpl#getJavaClass* This is to
> generate *Enum* java type for *SYMBOL;*
> # Add SQL-to-Rel test cases for JSON functions.
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