Frank Chen created CALCITE-7810:
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Summary: Write Rex string literal digests directly
Key: CALCITE-7810
URL: https://issues.apache.org/jira/browse/CALCITE-7810
Project: Calcite
Issue Type: Sub-task
Reporter: Frank Chen
String RexLiteral digest generation currently asks NlsString to build a
complete SQL string and then copies that temporary string into the destination
StringBuilder. Large literal ARRAYs repeat this allocation for every element.
Add NlsString.asSql overloads that append the escaped SQL representation
directly to a caller-provided StringBuilder, while preserving ANSI dialect
selection, charset-prefix handling, quote escaping, and existing output
behavior.
The isolated Druid benchmark reduced allocation by 2.46% at 100,000 string
literals and 1.31% at 1,000,000 string literals.
Pull request: [PR #5284|https://github.com/apache/calcite/pull/5284]
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