Function AST_PrepareUpdateOp

src/ast/ast_build_op_contexts.c:401–427

//------------------------------------------------------------------------------

rax *AST_PrepareUpdateOp
(
	GraphContext *gc,
	const cypher_astnode_t *clause
) {
	cypher_astnode_type_t type = cypher_astnode_type(clause);
	ASSERT(type == CYPHER_AST_SET || type == CYPHER_AST_REMOVE);

	rax *updates = raxNew(); // entity alias -> EntityUpdateEvalCtx
	if(type == CYPHER_AST_SET) {
		uint nitems = cypher_ast_set_nitems(clause);
		for(uint i = 0; i < nitems; i++) {
			const cypher_astnode_t *set_item =
				cypher_ast_set_get_item(clause, i);
			_ConvertUpdateItem(gc, updates, set_item);
		}
	} else {
		uint nitems = cypher_ast_remove_nitems(clause);
		for(uint i = 0; i < nitems; i++) {
			const cypher_astnode_t *remove_item =
				cypher_ast_remove_get_item(clause, i);
			_ConvertUpdateItem(gc, updates, remove_item);
		}
	}

	return updates;
}

//------------------------------------------------------------------------------
// CREATE operation