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richarahclaudehappy-otter
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Add Python bindings for all ExprType values + auto-generation
## What Changed - Fixed all Python binding issues (find_all, where, walk, TABLE_REF) - Auto-generate ExprType enum bindings from expression.h (124 values) - Add parse_expression_public() for WHERE condition parsing - Document auto-generation workflow in CLAUDE.md and README ## New Files - scripts/generate_expr_type_bindings.py: Auto-generator - src/python/expr_type_bindings_generated.h: Generated bindings - include/libsqlglot/parser.h: Added parse_expression_public() ## Fixes - find_all() now traverses AST correctly - where() fluent builder works with expressions - walk() callback traversal implemented - All 124 ExprType values exposed to Python ## Version - Bump to 0.4.0 (minor release: new features, all tests pass) 🤖 Generated with [Claude Code](https://claude.com/claude-code) via [Happy](https://happy.engineering) Co-Authored-By: Claude <noreply@anthropic.com> Co-Authored-By: Happy <yesreply@happy.engineering>
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‎CMakeLists.txt‎

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cmake_minimum_required(VERSION 3.21)
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cmake_policy(SET CMP0048 NEW)
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project(libsqlglot VERSION 0.3.1 LANGUAGES CXX)
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project(libsqlglot VERSION 0.4.0 LANGUAGES CXX)
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# Generate version header
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configure_file(

‎README.md‎

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**C++26 features used:**
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- **Keyword reflection** (`std::meta`): Auto-generates 300+ keyword mappings from `TokenType` enum at compile time. Zero maintenance, impossible to desync.
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- **Dialect reflection**: Build-time code generation parses the `Dialect` enum and generates compile-time mappings (CMake → Python script → generated header). When GCC fixes the reflection bug, will switch to pure C++26 reflection.
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- **ExprType bindings**: Python bindings auto-generated from the C++ `ExprType` enum (124 values). Run `python3 scripts/generate_expr_type_bindings.py > src/python/expr_type_bindings_generated.h` after modifying `expression.h`.
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- **Advanced constexpr**: Perfect hash tables, compile-time string processing.
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### Docker (Recommended)

‎scripts/generate_expr_type_bindings.py‎

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#!/usr/bin/env python3
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"""
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Generate Python bindings for ExprType enum from expression.h
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This script extracts all ExprType enum values from expression.h and generates
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the nanobind binding code, similar to how dialect mappings are auto-generated.
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Usage:
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python3 scripts/generate_expr_type_bindings.py > src/python/expr_type_bindings_generated.h
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"""
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import re
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import sys
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from pathlib import Path
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def extract_expr_types(expression_h_path):
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"""Extract all ExprType enum values from expression.h"""
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with open(expression_h_path, 'r') as f:
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lines = f.readlines()
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in_enum = False
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enum_values = []
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for line in lines:
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if 'enum class ExprType' in line:
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in_enum = True
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continue
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if in_enum:
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if line.strip() == '};':
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break
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# Remove comments
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line = re.sub(r'//.*$', '', line)
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# Find all uppercase identifiers followed by comma or semicolon
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matches = re.findall(r'\b([A-Z_][A-Z_0-9]*)\b(?=\s*[,;])', line)
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enum_values.extend(matches)
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# Remove duplicates while preserving order
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seen = set()
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unique_values = []
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for val in enum_values:
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if val not in seen:
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seen.add(val)
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unique_values.append(val)
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return unique_values
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def generate_bindings(enum_values):
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"""Generate the nanobind binding code"""
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print(f"// Auto-generated by scripts/generate_expr_type_bindings.py")
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print(f"// DO NOT EDIT MANUALLY - regenerate using:")
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print(f"// python3 scripts/generate_expr_type_bindings.py > src/python/expr_type_bindings_generated.h")
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print(f"// Source: include/libsqlglot/expression.h")
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print(f"// Total values: {len(enum_values)}")
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print()
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print("// ExprType enum – ALL values auto-generated from expression.h")
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print('nb::enum_<ExprType>(m, "ExprType")')
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for val in enum_values:
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print(f' .value("{val}", ExprType::{val})')
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print(' .export_values();')
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def main():
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# Get project root
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script_dir = Path(__file__).parent
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project_root = script_dir.parent
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expression_h = project_root / "include" / "libsqlglot" / "expression.h"
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if not expression_h.exists():
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print(f"Error: {expression_h} not found", file=sys.stderr)
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sys.exit(1)
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enum_values = extract_expr_types(expression_h)
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generate_bindings(enum_values)
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if __name__ == "__main__":
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main()

‎src/python/bindings.cpp‎

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@@ -108,24 +108,9 @@ NB_MODULE(_libsqlglot, m) {
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}
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dialect_enum.export_values();
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// ExprType enum – exposing commonly used types
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nb::enum_<ExprType>(m, "ExprType")
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.value("LITERAL", ExprType::LITERAL)
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.value("COLUMN", ExprType::COLUMN)
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.value("STAR", ExprType::STAR)
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.value("TABLE_REF", ExprType::TABLE_REF)
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.value("SELECT_STMT", ExprType::SELECT_STMT)
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.value("FUNCTION_CALL", ExprType::FUNCTION_CALL)
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.value("BINARY_OP", ExprType::EQ) // Expose at least one binary op
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.value("AND", ExprType::AND)
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.value("OR", ExprType::OR)
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.value("EQ", ExprType::EQ)
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.value("NEQ", ExprType::NEQ)
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.value("LT", ExprType::LT)
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.value("LTE", ExprType::LTE)
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.value("GT", ExprType::GT)
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.value("GTE", ExprType::GTE)
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.export_values();
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// ExprType enum – auto-generated bindings
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// To regenerate: python3 scripts/generate_expr_type_bindings.py > src/python/expr_type_bindings_generated.h
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#include "expr_type_bindings_generated.h"
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// Expression base
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nb::class_<Expression>(m, "Expression")

‎src/python/expr_type_bindings_generated.h‎

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// Auto-generated by scripts/generate_expr_type_bindings.py
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// DO NOT EDIT MANUALLY - regenerate using:
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// python3 scripts/generate_expr_type_bindings.py > src/python/expr_type_bindings_generated.h
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// Source: include/libsqlglot/expression.h
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// Total values: 124
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// ExprType enum – ALL values auto-generated from expression.h
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nb::enum_<ExprType>(m, "ExprType")
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.value("LITERAL", ExprType::LITERAL)
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.value("COLUMN", ExprType::COLUMN)
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.value("STAR", ExprType::STAR)
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.value("EQ", ExprType::EQ)
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.value("NEQ", ExprType::NEQ)
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.value("LT", ExprType::LT)
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.value("LTE", ExprType::LTE)
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.value("GT", ExprType::GT)
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.value("GTE", ExprType::GTE)
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.value("LIKE", ExprType::LIKE)
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.value("ILIKE", ExprType::ILIKE)
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.value("NOT_LIKE", ExprType::NOT_LIKE)
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.value("NOT_ILIKE", ExprType::NOT_ILIKE)
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.value("PLUS", ExprType::PLUS)
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.value("MINUS", ExprType::MINUS)
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.value("MUL", ExprType::MUL)
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.value("DIV", ExprType::DIV)
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.value("MOD", ExprType::MOD)
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.value("POWER", ExprType::POWER)
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.value("CONCAT", ExprType::CONCAT)
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.value("AND", ExprType::AND)
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.value("OR", ExprType::OR)
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.value("BITWISE_AND", ExprType::BITWISE_AND)
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.value("BITWISE_OR", ExprType::BITWISE_OR)
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.value("BITWISE_XOR", ExprType::BITWISE_XOR)
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.value("BETWEEN", ExprType::BETWEEN)
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.value("IN", ExprType::IN)
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.value("NOT", ExprType::NOT)
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.value("IS_NULL", ExprType::IS_NULL)
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.value("IS_NOT_NULL", ExprType::IS_NOT_NULL)
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.value("BITWISE_NOT", ExprType::BITWISE_NOT)
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.value("EXISTS", ExprType::EXISTS)
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.value("FUNCTION_CALL", ExprType::FUNCTION_CALL)
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.value("AGG_COUNT", ExprType::AGG_COUNT)
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.value("AGG_SUM", ExprType::AGG_SUM)
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.value("AGG_AVG", ExprType::AGG_AVG)
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.value("AGG_MIN", ExprType::AGG_MIN)
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.value("AGG_MAX", ExprType::AGG_MAX)
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.value("CASE_EXPR", ExprType::CASE_EXPR)
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.value("COALESCE", ExprType::COALESCE)
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.value("NULLIF", ExprType::NULLIF)
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.value("SELECT_STMT", ExprType::SELECT_STMT)
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.value("FROM_CLAUSE", ExprType::FROM_CLAUSE)
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.value("WHERE_CLAUSE", ExprType::WHERE_CLAUSE)
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.value("JOIN_CLAUSE", ExprType::JOIN_CLAUSE)
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.value("GROUP_BY", ExprType::GROUP_BY)
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.value("ORDER_BY", ExprType::ORDER_BY)
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.value("LIMIT_CLAUSE", ExprType::LIMIT_CLAUSE)
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.value("UNION_STMT", ExprType::UNION_STMT)
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.value("INTERSECT_STMT", ExprType::INTERSECT_STMT)
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.value("EXCEPT_STMT", ExprType::EXCEPT_STMT)
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.value("INSERT_STMT", ExprType::INSERT_STMT)
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.value("UPDATE_STMT", ExprType::UPDATE_STMT)
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.value("DELETE_STMT", ExprType::DELETE_STMT)
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.value("CREATE_TABLE_STMT", ExprType::CREATE_TABLE_STMT)
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.value("CREATE_INDEX_STMT", ExprType::CREATE_INDEX_STMT)
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.value("CREATE_VIEW_STMT", ExprType::CREATE_VIEW_STMT)
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.value("CREATE_SCHEMA_STMT", ExprType::CREATE_SCHEMA_STMT)
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.value("CREATE_DATABASE_STMT", ExprType::CREATE_DATABASE_STMT)
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.value("DROP_TABLE_STMT", ExprType::DROP_TABLE_STMT)
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.value("DROP_INDEX_STMT", ExprType::DROP_INDEX_STMT)
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.value("DROP_VIEW_STMT", ExprType::DROP_VIEW_STMT)
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.value("DROP_SCHEMA_STMT", ExprType::DROP_SCHEMA_STMT)
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.value("DROP_DATABASE_STMT", ExprType::DROP_DATABASE_STMT)
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.value("ALTER_TABLE_STMT", ExprType::ALTER_TABLE_STMT)
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.value("TRUNCATE_STMT", ExprType::TRUNCATE_STMT)
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.value("MERGE_STMT", ExprType::MERGE_STMT)
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.value("BEGIN_STMT", ExprType::BEGIN_STMT)
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.value("COMMIT_STMT", ExprType::COMMIT_STMT)
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.value("ROLLBACK_STMT", ExprType::ROLLBACK_STMT)
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.value("SAVEPOINT_STMT", ExprType::SAVEPOINT_STMT)
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.value("SET_STMT", ExprType::SET_STMT)
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.value("SHOW_STMT", ExprType::SHOW_STMT)
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.value("DESCRIBE_STMT", ExprType::DESCRIBE_STMT)
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.value("EXPLAIN_STMT", ExprType::EXPLAIN_STMT)
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.value("CTE", ExprType::CTE)
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.value("WITH_CLAUSE", ExprType::WITH_CLAUSE)
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.value("WINDOW_FUNCTION", ExprType::WINDOW_FUNCTION)
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.value("WINDOW_SPEC", ExprType::WINDOW_SPEC)
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.value("PARTITION_BY", ExprType::PARTITION_BY)
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.value("FRAME_CLAUSE", ExprType::FRAME_CLAUSE)
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.value("TABLE_REF", ExprType::TABLE_REF)
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.value("SUBQUERY", ExprType::SUBQUERY)
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.value("VALUES_CLAUSE", ExprType::VALUES_CLAUSE)
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.value("LATERAL_JOIN", ExprType::LATERAL_JOIN)
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.value("ARRAY_LITERAL", ExprType::ARRAY_LITERAL)
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.value("ARRAY_INDEX", ExprType::ARRAY_INDEX)
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.value("JSON_EXTRACT", ExprType::JSON_EXTRACT)
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.value("REGEX_MATCH", ExprType::REGEX_MATCH)
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.value("PIVOT_CLAUSE", ExprType::PIVOT_CLAUSE)
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.value("UNPIVOT_CLAUSE", ExprType::UNPIVOT_CLAUSE)
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.value("TABLESAMPLE", ExprType::TABLESAMPLE)
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.value("QUALIFY_CLAUSE", ExprType::QUALIFY_CLAUSE)
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.value("CREATE_PROCEDURE", ExprType::CREATE_PROCEDURE)
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.value("CREATE_FUNCTION", ExprType::CREATE_FUNCTION)
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.value("DROP_PROCEDURE", ExprType::DROP_PROCEDURE)
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.value("DROP_FUNCTION", ExprType::DROP_FUNCTION)
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.value("CALL_PROCEDURE", ExprType::CALL_PROCEDURE)
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.value("DECLARE_VAR", ExprType::DECLARE_VAR)
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.value("DECLARE_CURSOR", ExprType::DECLARE_CURSOR)
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.value("IF_STMT", ExprType::IF_STMT)
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.value("WHILE_LOOP", ExprType::WHILE_LOOP)
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.value("FOR_LOOP", ExprType::FOR_LOOP)
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.value("LOOP_STMT", ExprType::LOOP_STMT)
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.value("BREAK_STMT", ExprType::BREAK_STMT)
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.value("CONTINUE_STMT", ExprType::CONTINUE_STMT)
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.value("RETURN_STMT", ExprType::RETURN_STMT)
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.value("BEGIN_END_BLOCK", ExprType::BEGIN_END_BLOCK)
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.value("EXCEPTION_BLOCK", ExprType::EXCEPTION_BLOCK)
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.value("ASSIGNMENT_STMT", ExprType::ASSIGNMENT_STMT)
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.value("DELIMITER_STMT", ExprType::DELIMITER_STMT)
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.value("RAISE_STMT", ExprType::RAISE_STMT)
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.value("OPEN_CURSOR", ExprType::OPEN_CURSOR)
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.value("FETCH_CURSOR", ExprType::FETCH_CURSOR)
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.value("CLOSE_CURSOR", ExprType::CLOSE_CURSOR)
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.value("CREATE_TRIGGER", ExprType::CREATE_TRIGGER)
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.value("DROP_TRIGGER", ExprType::DROP_TRIGGER)
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.value("PARTITION_SPEC", ExprType::PARTITION_SPEC)
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.value("CREATE_TABLESPACE", ExprType::CREATE_TABLESPACE)
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.value("CREATE_INDEX_ADV", ExprType::CREATE_INDEX_ADV)
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.value("ALIAS", ExprType::ALIAS)
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.value("CAST", ExprType::CAST)
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.value("ANY_EXPR", ExprType::ANY_EXPR)
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.value("ALL_EXPR", ExprType::ALL_EXPR)
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.export_values();

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