[SPARK-59405][SQL] XSD Validation improvements - #58698
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Validators used for rowValidationXSDPath are now created through ValidatorUtil.newValidator, which disables external DTD and schema access and enables secure processing on the validator. A JDK-default validator resolves external DTDs and entities found in record data during validate(), before the record parser, which rejects DTDs, sees the record. Records containing such references now fail validation and are handled per parse mode. StaxXMLRecordReader creates a fresh validator per record instead of reusing one through Validator.reset(), which does not retain configuration applied after creation. A validator whose JAXP implementation cannot disable external access now fails the query uniformly instead of marking records corrupt. Co-authored-by: Cursor <cursoragent@cursor.com> Co-Authored-By: Holden Karau <holden@pigscanfly.ca>
StaxXMLRecordReader now keeps one Validator for the lifetime of the reader and re-applies the record-validation configuration after each Validator.reset(), instead of allocating a fresh Validator per record. Validator.reset() does not retain configuration applied after construction, so the secure-processing settings must be re-applied on every reset; ValidatorUtil.reset factors that out so construction and per-record reset share one code path. Reusing the Validator avoids the per-record allocation cost of Schema.newValidator(). Co-authored-by: Cursor <cursoragent@cursor.com> Co-Authored-By: Holden Karau <holden@pigscanfly.ca>
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What changes were proposed in this pull request?
Change validation when using rowValidationXSDPath to match the regular validation flow path and re-use
Why are the changes needed?
Current XSD validation is too slow when using rowValidationXSDPath.
Does this PR introduce any user-facing change?
Maybe slight performance improvement
How was this patch tested?
Existing unit tests + new unit test.
Was this patch authored or co-authored using generative AI tooling?
Claude and Cursor