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[SPARK-57515][SQL] Surface MALFORMED_CSV_RECORD instead of ArrayIndexOutOfBoundsException when CSV header exceeds maxColumns#56581

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[SPARK-57515][SQL] Surface MALFORMED_CSV_RECORD instead of ArrayIndexOutOfBoundsException when CSV header exceeds maxColumns#56581
jubins wants to merge 3 commits into
apache:masterfrom
jubins:j-SPARK-57515-csv-header-maxcolumn

Use UnivocityParser.parseLine for header parsing; update tests

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succeeded Jun 19, 2026 in 9s