WHERE condition parser

Author: lmangani

CMakeLists.txt

@@ -12,6 +12,7 @@ include_directories(src/include)
 set(EXTENSION_SOURCES 
   src/parser_tools_extension.cpp
   src/parse_tables.cpp
+  src/parse_where.cpp
 )
 
 build_static_extension(${TARGET_NAME} ${EXTENSION_SOURCES})

src/include/parse_where.hpp

@@ -0,0 +1,30 @@
+#pragma once
+
+#include "duckdb.hpp"
+#include <string>
+#include <vector>
+
+namespace duckdb {
+
+// Forward declarations
+class DatabaseInstance;
+
+struct WhereConditionResult {
+    std::string condition;
+    std::string table_name;  // The table this condition applies to (if determinable)
+    std::string context;     // The context where this condition appears (WHERE, HAVING, etc.)
+};
+
+struct DetailedWhereConditionResult {
+    std::string column_name;     // The column being compared
+    std::string operator_type;   // The comparison operator (>, <, =, etc.)
+    std::string value;          // The value being compared against
+    std::string table_name;     // The table this condition applies to (if determinable)
+    std::string context;        // The context where this condition appears (WHERE, HAVING, etc.)
+};
+
+void RegisterParseWhereFunction(DatabaseInstance &db);
+void RegisterParseWhereScalarFunction(DatabaseInstance &db);
+void RegisterParseWhereDetailedFunction(DatabaseInstance &db);
+
+} // namespace duckdb