[SQL] Retry compiling a query with CTEs by converting CTEs to local views - #6836
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…iews Signed-off-by: Mihai Budiu <mbudiu@feldera.com>
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Aug 10, 2026
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A query containing CTEs such as
Is compiled by Calcite into a single complex plan, which sometimes can stump the decorrelator.
This PR introduces a retry phase: if decorrelation of this plan fails, the query is rewritten as
This is compiled into TWO separate queries, which are decorrelated and optimized separately. Sometimes the decorrelator can cope with the simpler queries.