[SPARK-52929][SQL] Support MySQL and SQLServer connector for DSv2 Join pushdown#51637
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PetarVasiljevic-DB wants to merge 1 commit intoapache:masterfrom
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[SPARK-52929][SQL] Support MySQL and SQLServer connector for DSv2 Join pushdown#51637PetarVasiljevic-DB wants to merge 1 commit intoapache:masterfrom
PetarVasiljevic-DB wants to merge 1 commit intoapache:masterfrom
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cloud-fan
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thanks, merging to master! |
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What changes were proposed in this pull request?
Similar to #51594, I am enabling the join pushdown for MySQL and SQLServer connectors.
Additionally, I am moving
JoinPushdownAliasGeneratortoJdbcSQLQueryBuilderand using it there as well to generate new subquery alias used for full join subquery (previously, subqueries were generated only for left and right side, but now the whole thing needs to be subqueried). This is needed for these 2 dialects. H2, Oracle and Postgres didn't hit this issue, but they also still work with this, so there is no need for specialization.Why are the changes needed?
MySQL and SQLServer connectors don't support join pushdown.
Does this PR introduce any user-facing change?
No, since the flag
spark.sql.optimizer.datasourceV2JoinPushdownis disabled. If enabled, it will be attempted to push down to join directly to the scan node.How was this patch tested?
New tests.
Was this patch authored or co-authored using generative AI tooling?