Function _AST_MapExpression

src/ast/ast_build_reference_map.c:31–53

Map identifiers within an expression.

// Map identifiers within an expression.
static void _AST_MapExpression(AST *ast, const cypher_astnode_t *exp) {
	cypher_astnode_type_t type = cypher_astnode_type(exp);

	// In case of identifier.
	if(type == CYPHER_AST_IDENTIFIER) {
		const char *identifier_name = cypher_ast_identifier_get_name(exp);
		_AST_UpdateRefMap(ast, identifier_name);
	} else if(type == CYPHER_AST_PATTERN_PATH) {
		// In case of pattern filter or path projection.
		_AST_MapReferencedEntitiesInPath(ast, exp, true);
	} else if(type == CYPHER_AST_SHORTEST_PATH) {
		// Reference all entity names in a shortest path.
		_AST_MapReferencedEntitiesInPath(ast, exp, true);
	} else {
		// Recurse over children.
		uint child_count = cypher_astnode_nchildren(exp);
		for(uint i = 0; i < child_count; i++) {
			const cypher_astnode_t *child = cypher_astnode_get_child(exp, i);
			// Recursively continue mapping.
			_AST_MapExpression(ast, child);
		}
	}
}

// Maps the RHS of "AS" projected entities.
static inline void _AST_MapProjectionAlias(AST *ast, const cypher_astnode_t *projection) {