- With this, invalid combinations of the FindAny/FindAnyIndex bools are
no longer possible and we can remove the corresponding check
- Also makes the instantiations more readable.
- The patterns are not used in hashing, there should not be a performance
impact when we use stuff from the standard library instead.
- added forgotten .reserve() in FunctionsMultiStringPosition.h
This commit migrates ClickHouse to Vectorscan. The first 10 min of
[0] explain the reasons for it.
(*) Addresses (but does not resolve) #38046
(*) Config parameter names (e.g. "max_hyperscan_regexp_length") are
preserved for compatibility. Likewise, error codes (e.g.
"ErrorCodes::HYPERSCAN_CANNOT_SCAN_TEXT") and function/class names (e.g.
"HyperscanDeleter") are preserved as vectorscan aims to be a drop-in
replacement.
[0] https://www.youtube.com/watch?v=KlZWmmflW6M
