Add SQL parser foundation: core types, arena, tokenizer, classifier#4

Merged

renecannao merged 44 commits intomainfrom

feat/sql-parser-foundation

Mar 24, 2026

Commits on Mar 24, 2026

Add SQL parser design spec for ProxySQL integration
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Address spec review findings: arena growth, AstNode layout, multi-statement support
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Fix implementation plan issues from review
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feat: add new build system and test infrastructure for sql_parser
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feat: add core types — StringRef, Dialect, StmtType, NodeType enums
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feat: add arena allocator with block chaining and max size
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feat: add AstNode (32-byte) and ParseResult structs
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feat: add token types and keyword lookup tables for MySQL and PostgreSQL
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feat: add dialect-templated tokenizer with MySQL and PostgreSQL support
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feat: add classifier and Tier 2 extractors for all statement types
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chore: update .gitignore for new parser build artifacts
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fix: suppress unused parameter warnings, add doubled single-quote escaping
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Add expression parser + SET deep parser implementation plan
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feat: add Pratt expression parser with literals, identifiers, and operators
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feat: add SET deep parser with full AST for all SET variants
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test: add extensive SET parser tests from ProxySQL test corpus
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ci: add GitHub Actions workflow for build and test
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Add SELECT deep parser implementation plan
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feat: add SELECT deep parser with FROM, JOIN, WHERE, GROUP BY, ORDER BY, LIMIT, locking
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Add query emitter implementation plan
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feat: add query emitter with round-trip support for SET and SELECT
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Add prepared statement cache and benchmarks implementation plans
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feat: add prepared statement cache with parse_and_cache, execute, and bindings-aware emitter
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feat: add Google Benchmark performance tests for parser operations
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Add design spec for Tier 1 promotions (INSERT/UPDATE/DELETE), UNION, and query digest
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Fix spec review issues: shared TableRefParser, compound query layering, UPDATE AST
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Add implementation plans 7-11: INSERT, UPDATE, DELETE, UNION, digest
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Extract TableRefParser from SelectParser for shared table ref parsing
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Add INSERT-related tokens, node types, and keyword table entries
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Add INSERT/REPLACE deep parser with emitter and classifier integration
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Add comprehensive INSERT parser tests with round-trip verification
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Add NODE_UPDATE_STMT and NODE_UPDATE_SET_CLAUSE to NodeType enum
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Add UpdateParser<D> header-only template for UPDATE deep parsing
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Integrate UPDATE deep parser with emitter and classifier
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Add comprehensive UPDATE parser tests with round-trip verification
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Add DELETE node types (NODE_DELETE_STMT, NODE_DELETE_USING_CLAUSE)
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Add DELETE deep parser for MySQL and PostgreSQL
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Integrate DELETE parser with emitter and classifier
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Add comprehensive DELETE parser tests
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Add TK_INTERSECT, TK_EXCEPT tokens and NODE_COMPOUND_QUERY, NODE_SET_OPERATION node types
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Add CompoundQueryParser for UNION/INTERSECT/EXCEPT with precedence
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Integrate CompoundQueryParser into parser and add emitter support
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Add compound query tests and fix SelectParser compound mode
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Add query digest/normalization module (Plan 11)
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