Frank Chen created CALCITE-7806:
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Summary: Avoid resolving generated CAST calls during ARRAY
validation
Key: CALCITE-7806
URL: https://issues.apache.org/jira/browse/CALCITE-7806
Project: Calcite
Issue Type: Sub-task
Reporter: Frank Chen
Large string ARRAY validation creates generated CAST calls for operands whose
inferred type differs from the common element type. These calls already use the
built-in CAST operator, but the normal validation path resolves the operator
again by name for every operand.
Validate each generated CAST directly through its existing operator before
replacing the operand. This preserves operand checks and validated-node type
registration while avoiding repeated function lookup.
The isolated Druid benchmark reduced allocation by 19.95% at 100,000 string
literals and 20.48% at 1,000,000 string literals.
Pull request: [PR #5280|https://github.com/apache/calcite/pull/5280]
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