Fix allow_experimental_projection_optimization with enable_global_with_statement #34650
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Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md):
Fix
allow_experimental_projection_optimization
withenable_global_with_statement
(before it may lead toStack size too large
error in case of multiple expressions inWITH
clause, and also it executes scalar subqueries again and again, so not it will be more optimal).allow_experimental_projection_optimization requires one more
InterpreterSelectQuery, which with enable_global_with_statement will
apply ApplyWithAliasVisitor if the query is not subquery.
But this should not be done for queries from
MergeTreeData::getQueryProcessingStage()/getQueryProcessingStageWithAggregateProjections()
since this will duplicate WITH statements over and over.
This will also fix scalar.xml perf tests, that leads to the following
error now:
And since it has very long query in the log, this leads to the following
perf test error:
Cc: @amosbird
Refs: #34456