Kirill Tkalenko created IGNITE-29015:
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Summary: SQL Calcite: Provide a unified mechanism for fine-grained
SQL semantics customization
Key: IGNITE-29015
URL: https://issues.apache.org/jira/browse/IGNITE-29015
Project: Ignite
Issue Type: Improvement
Reporter: Kirill Tkalenko
Assignee: Kirill Tkalenko
Calcite may require fine-grained settings that affect SQL validation, planning,
and execution. Currently, *{{IgniteSqlPaginationPolicy}}* is an example of such
a setting.
Adding more independent policies may complicate their propagation through the
query pipeline.
Consider introducing an immutable *{{IgniteSqlSemantics}}* object that:
* contains fine-grained SQL settings;
* is passed through Calcite {*}{{Context}}{*};
* can be provided by a plugin through {*}{{FrameworkConfig}}{*};
* has default values preserving existing behavior.
Initially, it can contain the pagination rounding mode. Later, it can support
other settings, such as Oracle-compatible handling of {{''}} as {{{}NULL{}}}.
The initial change should not introduce public configuration or change existing
SQL behavior.
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