Add ExpressionAnalyzer for pluggable expression-level statistics estimation#21122

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asolimando wants to merge 15 commits intoapache:mainfrom

asolimando:asolimando/ndv-expression-analyzer

Commits on Apr 15, 2026

Add ExpressionAnalyzer for pluggable expression-level statistics
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Fix CI: update config docs, sqllogictest, and doc links
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Fix doc placement, import path, extract helper, defer selectivity computation
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Snapshot column stats for analyzer to avoid ordering dependency
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Use registry NDV for equality/inequality selectivity on expressions
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Narrow injective arithmetic to addition and subtraction only
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Make resolve_ndv symmetric: use max NDV across both operands
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Clarify enable_expression_analyzer scope in config and doc comments
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Inject ExpressionAnalyzerRegistry into exec nodes and re-inject via optimizer loop
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test(filter): verify ExpressionAnalyzer inclusion-exclusion selectivity for OR predicates
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refactor(expression_analyzer): delegate when no NDV statistics are available
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test(expression_analyzer): add StatisticsTable and end-to-end SLT for OR selectivity
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fix: cargo fmt, clippy clone_on_ref_ptr, update configs.md
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fix(slt): update information_schema.slt config description to match shortened use_expression_analyzer doc
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fix(doc): remove broken intra-doc link for Statistics in StatisticsTable
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