[SPARK-49543][SQL] Add SHOW COLLATIONS command#55099

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Commits on Mar 30, 2026

[SPARK-49543][SQL] Add SHOW COLLATIONS command

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Commits on Mar 31, 2026

[SPARK-49543][SQL] Update keyword golden files and tests for COLLATIONS token

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[SPARK-49543][SQL] Fix keyword golden files and documentation for COLLATIONS

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[SPARK-49543][SQL] Fix SHOW COLLATIONS LIKE pattern to use * wildcard

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[SPARK-49543][SQL] Support % wildcard in SHOW COLLATIONS LIKE pattern

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Revert "[SPARK-49543][SQL] Support % wildcard in SHOW COLLATIONS LIKE pattern"
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[SPARK-49543][DOCS] Add documentation for SHOW COLLATIONS

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[SPARK-49543][SQL] Fix SHOW COLLATIONS parser test to use * wildcard

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