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oceanbase-admin
446
src/sql/engine/expr/ob_expr_is.cpp
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446
src/sql/engine/expr/ob_expr_is.cpp
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/**
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* Copyright (c) 2021 OceanBase
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* OceanBase CE is licensed under Mulan PubL v2.
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* You can use this software according to the terms and conditions of the Mulan PubL v2.
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* You may obtain a copy of Mulan PubL v2 at:
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||||
* http://license.coscl.org.cn/MulanPubL-2.0
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||||
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PubL v2 for more details.
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*/
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#define USING_LOG_PREFIX SQL_ENG
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#include "sql/engine/expr/ob_expr_is.h"
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#include "share/object/ob_obj_cast.h"
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//#include "sql/engine/expr/ob_expr_promotion_util.h"
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#include "sql/parser/ob_item_type.h"
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#include "sql/session/ob_sql_session_info.h"
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#include "share/config/ob_server_config.h"
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namespace oceanbase {
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using namespace common;
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namespace sql {
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ObExprIsBase::ObExprIsBase(ObIAllocator& alloc, ObExprOperatorType type, const char* name)
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: ObRelationalExprOperator(alloc, type, name, 3){};
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int ObExprIsBase::calc_result_type3(ObExprResType& type, ObExprResType& type1, ObExprResType& type2,
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ObExprResType& type3, ObExprTypeCtx& type_ctx) const
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{
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int ret = OB_SUCCESS;
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const ObSQLSessionInfo* session = static_cast<const ObSQLSessionInfo*>(type_ctx.get_session());
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if (!session->use_static_typing_engine()) {
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ObExprResType tmp_type2;
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if (lib::is_oracle_mode() && type1.is_ext()) {
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type.set_int32(); // not tinyint, compatible with MySQL
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type.set_precision(DEFAULT_PRECISION_FOR_BOOL);
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type.set_scale(DEFAULT_SCALE_FOR_INTEGER);
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type.set_calc_type(type1.get_calc_type());
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type.set_result_flag(OB_MYSQL_NOT_NULL_FLAG);
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type2.set_calc_type(type2.get_type());
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} else {
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if (OB_FAIL(tmp_type2.assign(type2))) {
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LOG_WARN("failed to copy type", K(ret), K(type2));
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} else if (OB_FAIL(ObRelationalExprOperator::calc_result_type2(type, type1, tmp_type2, type_ctx))) {
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LOG_WARN("failed to calc result type", K(ret), K(type1), K(tmp_type2));
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} else {
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// always allow NULL value
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type.set_result_flag(OB_MYSQL_NOT_NULL_FLAG);
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type2.set_calc_type(type2.get_type());
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}
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}
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} else {
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// TODO add collection process for PL
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ObRawExpr* raw_expr = get_raw_expr();
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ObOpRawExpr* op_expr = static_cast<ObOpRawExpr*>(raw_expr);
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if (OB_ISNULL(op_expr) || OB_UNLIKELY(op_expr->get_param_count() != 3)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("op raw expr is null", K(ret), K(op_expr));
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} else {
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// always allow NULL value
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type.set_result_flag(OB_MYSQL_NOT_NULL_FLAG);
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type2.set_calc_type(type2.get_type());
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type3.set_calc_type(type3.get_type());
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ObRawExpr* param2 = op_expr->get_param_expr(1);
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ObConstRawExpr* const_param2 = static_cast<ObConstRawExpr*>(param2);
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ObRawExpr* param3 = op_expr->get_param_expr(2);
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ObConstRawExpr* const_param3 = static_cast<ObConstRawExpr*>(param3);
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if (OB_ISNULL(const_param2) || OB_ISNULL(const_param3)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("second or third child of is expr is null", K(ret), K(const_param2), K(const_param3));
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} else if (!const_param2->get_value().is_null()) { // is true/false
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if (ob_is_numeric_type(type1.get_type())) {
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type1.set_calc_meta(type1.get_obj_meta());
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type1.set_calc_accuracy(type1.get_accuracy());
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} else {
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type1.set_calc_type(ObNumberType);
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const ObAccuracy& calc_acc = ObAccuracy::DDL_DEFAULT_ACCURACY2[0][ObNumberType];
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type1.set_calc_accuracy(calc_acc);
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}
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} else { // is null
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if (const_param3->get_value().is_true()) {
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type1.set_calc_type(ObIntType);
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} else {
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type1.set_calc_type(type1.get_type());
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}
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// query range extract check the calc type of %type.
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type.set_calc_meta(type1.get_calc_meta());
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}
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type.set_type(ObInt32Type);
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type.set_precision(DEFAULT_PRECISION_FOR_BOOL);
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type.set_scale(DEFAULT_SCALE_FOR_INTEGER);
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}
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type_ctx.set_cast_mode(type_ctx.get_cast_mode() | CM_NO_RANGE_CHECK);
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}
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return ret;
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}
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int ObExprIs::calc_with_null(
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common::ObObj& result, const ObObj& obj1, const ObObj& obj2, const ObObj& obj3, ObCastCtx& cast_ctx) const
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{
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int ret = OB_SUCCESS;
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bool ret_bool = false;
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UNUSED(obj2);
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UNUSED(cast_ctx);
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if (obj3.is_true()) {
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if (obj1.is_null()) {
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ret_bool = true;
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} else {
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int64_t int_val = 0;
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EXPR_GET_INT64_V2(obj1, int_val);
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if (OB_SUCC(ret)) {
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if (int_val == 0) {
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ret_bool = true;
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} else {
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ret_bool = false;
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}
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}
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}
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} else {
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if (lib::is_oracle_mode() && obj1.get_meta().is_ext()) {
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ret = OB_NOT_SUPPORTED;
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} else {
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ret_bool = obj1.is_null();
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}
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}
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if (OB_SUCC(ret)) {
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result.set_int32(static_cast<int32_t>(ret_bool));
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}
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return ret;
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}
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int ObExprIsNot::calc_with_null(
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ObObj& result, const ObObj& obj1, const ObObj& obj2, const ObObj& obj3, ObCastCtx& cast_ctx) const
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{
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int ret = OB_SUCCESS;
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UNUSED(obj2);
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UNUSED(obj3);
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UNUSED(cast_ctx);
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bool ret_bool = false;
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if (lib::is_oracle_mode() && obj1.get_meta().is_ext()) {
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ret = OB_NOT_SUPPORTED;
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} else {
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ret_bool = !obj1.is_null();
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}
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result.set_int32(static_cast<int32_t>(ret_bool));
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return ret;
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}
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int ObExprIsBase::calc_with_int_internal(
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ObObj& result, const ObObj& obj1, const ObObj& obj2, ObCastCtx& cast_ctx, bool is_not) const
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{
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int ret = OB_SUCCESS;
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bool ret_bool = false;
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if (obj1.is_null()) {
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ret_bool = is_not;
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} else if (obj1.is_tinyint()) {
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ret_bool = is_not ? obj1.get_bool() != obj2.get_bool() : obj1.get_bool() == obj2.get_bool();
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} else {
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int64_t int_val = 0;
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EXPR_GET_INT64_V2(obj1, int_val);
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if (OB_SUCC(ret)) {
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if ((int_val != 0 && obj2.get_bool() == is_not) || (int_val == 0 && obj2.get_bool() == !is_not)) {
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ret_bool = false;
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} else {
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ret_bool = true;
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}
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} else {
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ret = OB_SUCCESS;
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if (obj2.get_bool() == is_not) {
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ret_bool = true;
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} else {
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ret_bool = false;
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}
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}
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}
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if (OB_SUCC(ret)) {
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result.set_int32(static_cast<int32_t>(ret_bool));
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}
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return ret;
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}
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int ObExprIs::calc_with_int(ObObj& result, const ObObj& obj1, const ObObj& obj2, ObCastCtx& cast_ctx) const
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{
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return calc_with_int_internal(result, obj1, obj2, cast_ctx, false);
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}
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int ObExprIsNot::calc_with_int(ObObj& result, const ObObj& obj1, const ObObj& obj2, ObCastCtx& cast_ctx) const
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{
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return calc_with_int_internal(result, obj1, obj2, cast_ctx, true);
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}
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// is null/true/false
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int ObExprIsBase::calc(
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ObObj& result, const ObObj& obj1, const ObObj& obj2, const ObObj& obj3, ObCastCtx& cast_ctx) const
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{
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int ret = OB_SUCCESS;
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if (OB_UNLIKELY(!obj2.is_null() && !obj2.is_tinyint())) {
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LOG_USER_ERROR(OB_INVALID_ARGUMENT_FOR_IS, to_cstring(obj1));
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ret = OB_INVALID_ARGUMENT_FOR_IS;
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LOG_WARN("invalid type for is operator", K(obj2));
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} else {
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if (obj2.is_null()) {
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ret = calc_with_null(result, obj1, obj2, obj3, cast_ctx);
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} else if (obj2.is_tinyint()) {
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ret = calc_with_int(result, obj1, obj2, cast_ctx);
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} // end else
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}
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return ret;
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}
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// the 3rd obj is used for this special case:
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// 'select * from t1 where c1 is null' can get rows with c1 is '0000-00-00' in mysql mode.
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int ObExprIsBase::calc_result3(
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ObObj& result, const ObObj& obj1, const ObObj& obj2, const ObObj& obj3, common::ObExprCtx& expr_ctx) const
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{
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EXPR_DEFINE_CAST_CTX(expr_ctx, CM_WARN_ON_FAIL);
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return calc(result, obj1, obj2, obj3, cast_ctx);
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}
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int ObExprIsBase::cg_expr_internal(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr,
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const ObConstRawExpr*& const_param2, const ObConstRawExpr*& const_param3) const
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{
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UNUSED(op_cg_ctx);
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int ret = OB_SUCCESS;
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const ObOpRawExpr* op_raw_expr = static_cast<const ObOpRawExpr*>(&raw_expr);
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if (rt_expr.arg_cnt_ != 3) {
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ret = OB_INVALID_ARGUMENT;
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LOG_WARN("isnot expr should have 3 params", K(ret), K(rt_expr.arg_cnt_));
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} else if (OB_ISNULL(rt_expr.args_) || OB_ISNULL(rt_expr.args_[0]) || OB_ISNULL(rt_expr.args_[1]) ||
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OB_ISNULL(rt_expr.args_[2])) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("children of isnot expr is null", K(ret), K(rt_expr.args_));
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} else {
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const ObRawExpr* param2 = op_raw_expr->get_param_expr(1);
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const ObRawExpr* param3 = op_raw_expr->get_param_expr(2);
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const_param2 = static_cast<const ObConstRawExpr*>(param2);
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const_param3 = static_cast<const ObConstRawExpr*>(param3);
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}
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return ret;
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}
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#define EVAL_FUNC(type) \
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if (is_not && is_true) { \
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eval_func = ObExprIsNot::type##_is_not_true; \
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} else if (is_not && !is_true) { \
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eval_func = ObExprIsNot::type##_is_not_false; \
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} else if (!is_not && is_true) { \
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eval_func = ObExprIs::type##_is_true; \
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} else if (!is_not && !is_true) { \
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eval_func = ObExprIs::type##_is_false; \
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}
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int ObExprIsBase::cg_result_type_class(ObObjType type, ObExpr::EvalFunc& eval_func, bool is_not, bool is_true) const
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{
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int ret = OB_SUCCESS;
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switch (type) {
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case ObTinyIntType:
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case ObSmallIntType:
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case ObMediumIntType:
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case ObInt32Type:
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case ObIntType:
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case ObUTinyIntType:
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case ObUSmallIntType:
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case ObUMediumIntType:
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case ObUInt32Type:
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case ObUInt64Type:
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case ObBitType: {
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EVAL_FUNC(int);
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break;
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}
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case ObFloatType:
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case ObUFloatType: {
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EVAL_FUNC(float);
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break;
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}
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case ObDoubleType:
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case ObUDoubleType: {
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EVAL_FUNC(double);
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break;
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}
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case ObMaxType: {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("is expr got unexpected type param", K(ret), K(type));
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break;
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}
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default: {
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EVAL_FUNC(number);
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break;
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}
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}
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return ret;
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}
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int ObExprIs::cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const
|
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{
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int ret = OB_SUCCESS;
|
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const ObConstRawExpr* param2 = NULL;
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const ObConstRawExpr* param3 = NULL;
|
||||
ObObjType param1_type = ObMaxType;
|
||||
if (OB_FAIL(cg_expr_internal(op_cg_ctx, raw_expr, rt_expr, param2, param3))) {
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LOG_WARN("cg_expr_inner failed", K(ret));
|
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} else if (OB_ISNULL(param2) || OB_ISNULL(param3)) {
|
||||
ret = OB_ERR_UNEXPECTED;
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LOG_WARN("const raw expr param2 or param3 is null", K(param2), K(param3));
|
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} else if (FALSE_IT(param1_type = rt_expr.args_[0]->datum_meta_.type_)) {
|
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} else if (param3->get_value().is_true()) { // special case: date value is '0000-00-00'.
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rt_expr.eval_func_ = ObExprIs::calc_is_date_int_null;
|
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} else if (param2->get_value().is_null()) { // c1 is null
|
||||
rt_expr.eval_func_ = ObExprIs::calc_is_null;
|
||||
} else if (param2->get_value().is_true()) {
|
||||
if (OB_FAIL(cg_result_type_class(param1_type, rt_expr.eval_func_, false, true))) {
|
||||
LOG_WARN("is expr got unexpected type param", K(ret));
|
||||
}
|
||||
} else if (param2->get_value().is_false()) {
|
||||
if (OB_FAIL(cg_result_type_class(param1_type, rt_expr.eval_func_, false, false))) {
|
||||
LOG_WARN("is expr got unexpected type param", K(ret));
|
||||
}
|
||||
} else {
|
||||
ret = OB_ERR_UNEXPECTED;
|
||||
LOG_WARN("second param of is expr is not null, true or false", K(ret), K(param2->get_value()));
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
int ObExprIsNot::cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const
|
||||
{
|
||||
int ret = OB_SUCCESS;
|
||||
const ObConstRawExpr* param2 = NULL;
|
||||
const ObConstRawExpr* param3 = NULL;
|
||||
ObObjType param1_type = ObMaxType;
|
||||
if (OB_FAIL(cg_expr_internal(op_cg_ctx, raw_expr, rt_expr, param2, param3))) {
|
||||
LOG_WARN("cg_expr_inner failed", K(ret));
|
||||
} else if (OB_ISNULL(param2) || OB_ISNULL(param3)) {
|
||||
ret = OB_ERR_UNEXPECTED;
|
||||
LOG_WARN("const raw expr param2 or param3 is null", K(param2), K(param3));
|
||||
} else if (FALSE_IT(param1_type = rt_expr.args_[0]->datum_meta_.type_)) {
|
||||
} else if (param2->get_value().is_null()) { // c1 is null
|
||||
rt_expr.eval_func_ = ObExprIsNot::calc_is_not_null;
|
||||
} else if (param2->get_value().is_true()) {
|
||||
if (OB_FAIL(cg_result_type_class(param1_type, rt_expr.eval_func_, true, true))) {
|
||||
LOG_WARN("is expr got unexpected type param", K(ret));
|
||||
}
|
||||
} else if (param2->get_value().is_false()) {
|
||||
if (OB_FAIL(cg_result_type_class(param1_type, rt_expr.eval_func_, true, false))) {
|
||||
LOG_WARN("is expr got unexpected type param", K(ret));
|
||||
}
|
||||
} else {
|
||||
ret = OB_ERR_UNEXPECTED;
|
||||
LOG_WARN("second param of is expr is not null, true or false", K(ret), K(param2->get_value()));
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
int ObExprIs::calc_is_date_int_null(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum)
|
||||
{
|
||||
int ret = OB_SUCCESS;
|
||||
ObDatum* param1 = NULL;
|
||||
if (OB_FAIL(expr.args_[0]->eval(ctx, param1))) {
|
||||
LOG_WARN("eval first param failed", K(ret));
|
||||
} else {
|
||||
bool ret_bool = param1->is_null() || param1->get_int() == 0;
|
||||
expr_datum.set_int32(static_cast<int32_t>(ret_bool));
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
int ObExprIs::calc_is_null(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum)
|
||||
{
|
||||
int ret = OB_SUCCESS;
|
||||
ObDatum* param1 = NULL;
|
||||
if (OB_FAIL(expr.args_[0]->eval(ctx, param1))) {
|
||||
LOG_WARN("eval first param failed", K(ret));
|
||||
} else {
|
||||
bool ret_bool = param1->is_null();
|
||||
expr_datum.set_int32(static_cast<int32_t>(ret_bool));
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
int ObExprIsNot::calc_is_not_null(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum)
|
||||
{
|
||||
int ret = OB_SUCCESS;
|
||||
ObDatum* param1 = NULL;
|
||||
if (OB_FAIL(expr.args_[0]->eval(ctx, param1))) {
|
||||
LOG_WARN("eval first param failed", K(ret));
|
||||
} else {
|
||||
bool ret_bool = !param1->is_null();
|
||||
expr_datum.set_int32(static_cast<int32_t>(ret_bool));
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
template <typename T>
|
||||
int ObExprIsBase::is_zero(T number)
|
||||
{
|
||||
return 0 == number;
|
||||
}
|
||||
template <>
|
||||
int ObExprIsBase::is_zero<number::ObCompactNumber>(number::ObCompactNumber number)
|
||||
{
|
||||
return number.is_zero();
|
||||
}
|
||||
|
||||
#define NUMERIC_CALC_FUNC(type, func_name, bool_is_not, is_true, str_is_not) \
|
||||
int func_name::type##_##str_is_not##_##is_true(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum) \
|
||||
{ \
|
||||
int ret = OB_SUCCESS; \
|
||||
ObDatum* param1 = NULL; \
|
||||
bool ret_bool = false; \
|
||||
if (OB_FAIL(expr.args_[0]->eval(ctx, param1))) { \
|
||||
LOG_WARN("eval first param failed", K(ret)); \
|
||||
} else if (param1->is_null()) { \
|
||||
ret_bool = bool_is_not; \
|
||||
} else { \
|
||||
ret_bool = bool_is_not == is_true ? is_zero(param1->get_##type()) : !is_zero(param1->get_##type()); \
|
||||
} \
|
||||
if (OB_SUCC(ret)) { \
|
||||
expr_datum.set_int32(static_cast<int32_t>(ret_bool)); \
|
||||
} \
|
||||
return ret; \
|
||||
}
|
||||
|
||||
NUMERIC_CALC_FUNC(int, ObExprIsNot, true, true, is_not)
|
||||
NUMERIC_CALC_FUNC(float, ObExprIsNot, true, true, is_not)
|
||||
NUMERIC_CALC_FUNC(double, ObExprIsNot, true, true, is_not)
|
||||
NUMERIC_CALC_FUNC(number, ObExprIsNot, true, true, is_not)
|
||||
|
||||
NUMERIC_CALC_FUNC(int, ObExprIsNot, true, false, is_not)
|
||||
NUMERIC_CALC_FUNC(float, ObExprIsNot, true, false, is_not)
|
||||
NUMERIC_CALC_FUNC(double, ObExprIsNot, true, false, is_not)
|
||||
NUMERIC_CALC_FUNC(number, ObExprIsNot, true, false, is_not)
|
||||
|
||||
NUMERIC_CALC_FUNC(int, ObExprIs, false, true, is)
|
||||
NUMERIC_CALC_FUNC(float, ObExprIs, false, true, is)
|
||||
NUMERIC_CALC_FUNC(double, ObExprIs, false, true, is)
|
||||
NUMERIC_CALC_FUNC(number, ObExprIs, false, true, is)
|
||||
|
||||
NUMERIC_CALC_FUNC(int, ObExprIs, false, false, is)
|
||||
NUMERIC_CALC_FUNC(float, ObExprIs, false, false, is)
|
||||
NUMERIC_CALC_FUNC(double, ObExprIs, false, false, is)
|
||||
NUMERIC_CALC_FUNC(number, ObExprIs, false, false, is)
|
||||
} // namespace sql
|
||||
} // namespace oceanbase
|
||||
Reference in New Issue
Block a user