Fix_max_query_size_for_kql_compound_operator:

[kashwy]

Changelog category (leave one):

• Bug Fix (user-visible misbehavior in an official stable release)

Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md):

Fix the issue of max_query_size for KQL compound operator like mv-expand. Related to #59626.

[kashwy]

Hi @antaljanosbenjamin , can you review this PR, this fixed another use case for kql operators like mv-expand (for #59626)

Thanks

[robot-clickhouse]

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Check name	Description	Status
AST fuzzer	Runs randomly generated queries to catch program errors. The build type is optionally given in parenthesis. If it fails, ask a maintainer for help	❌ failure
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[antaljanosbenjamin]

The changes looks great, only a tiny change for better readability.

[antaljanosbenjamin]

Tests:

• test_storage_azure_blob_storage/test.py::test_union_schema_inference_mode test_storage_azure_blob_storage/test.py::test_union_schema_inference_mode: Data race in registerStorageAzureBlob #60347
• 02908_many_requests_to_system_replicas 02908_many_requests_to_system_replicas is flaky #57443
• AST fuzzer is a tricky one. I am 99% sure the issue coming from KQL, but I couldn't reproduce it. Based on CI DB the same issue pops up on other PRs too. So my hypothesis is we still have some issues in KQL parsers, but this PR definitely fixes one and don't introduce another one. Therefore I will merge this PR.