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Copy pathob_expr_bool.cpp
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233 lines (216 loc) · 7.16 KB
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/**
* Copyright (c) 2021 OceanBase
* OceanBase CE is licensed under Mulan PubL v2.
* You can use this software according to the terms and conditions of the Mulan PubL v2.
* You may obtain a copy of Mulan PubL v2 at:
* http://license.coscl.org.cn/MulanPubL-2.0
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
* See the Mulan PubL v2 for more details.
*/
#define USING_LOG_PREFIX SQL_ENG
#include "sql/engine/expr/ob_expr_bool.h"
#include "sql/engine/expr/ob_expr_json_func_helper.h"
namespace oceanbase
{
namespace sql
{
using namespace oceanbase::common;
ObExprBool::ObExprBool(ObIAllocator &alloc)
: ObLogicalExprOperator(alloc, T_OP_BOOL, N_BOOL, 1, NOT_ROW_DIMENSION) {}
ObExprBool::~ObExprBool() {}
int ObExprBool::calc_result_type1(ObExprResType &type,
ObExprResType &type1,
ObExprTypeCtx &type_ctx) const
{
int ret = OB_SUCCESS;
UNUSED(type_ctx);
if (!lib::is_mysql_mode()) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("bool expr is only for mysql mode", K(ret));
} else if (ob_is_numeric_type(type1.get_type()) || ob_is_json(type1.get_type())) {
type1.set_calc_meta(type1.get_obj_meta());
type1.set_calc_accuracy(type1.get_accuracy());
if (ob_is_json(type1.get_type())) {
type1.set_calc_type(type1.get_type());
}
} else {
const ObObjType &calc_type = ObDoubleType;
type1.set_calc_type(calc_type);
const ObAccuracy &calc_acc = ObAccuracy::DDL_DEFAULT_ACCURACY2[0][calc_type];
type1.set_calc_accuracy(calc_acc);
}
const ObAccuracy &res_acc = ObAccuracy::DDL_DEFAULT_ACCURACY2[0][ObInt32Type];
type.set_type(ObInt32Type);
type.set_accuracy(res_acc);
ObExprOperator::calc_result_flag1(type, type1);
type_ctx.set_cast_mode(type_ctx.get_cast_mode() | CM_NO_RANGE_CHECK);
return ret;
}
#define CHECK_IS_TRUE_FUNC_NAME(type) \
int calc_bool_expr_for_##type(const ObExpr &expr, ObEvalCtx &ctx, \
ObDatum &res_datum)
// ObObjEvaluator::is_true()里面，如果输入obj是null，结果是false
// 但是我们这里需要设置为null
// eg: expr1 and null -> null
// 如果bool expr设置为false，上面结果会变成false
#define EVAL_ARG() \
int ret = OB_SUCCESS; \
ObDatum *child_datum = NULL; \
if (OB_FAIL(expr.args_[0]->eval(ctx, child_datum))) { \
LOG_WARN("eval arg 0 failed", K(ret)); \
} else if (child_datum->is_null()) { \
res_datum.set_null(); \
} else
CHECK_IS_TRUE_FUNC_NAME(integer_type)
{
EVAL_ARG()
{
int32_t res = (0 == child_datum->get_int()) ? 0 : 1;
res_datum.set_int32(res);
}
return ret;
}
CHECK_IS_TRUE_FUNC_NAME(float_type)
{
EVAL_ARG()
{
// 不考虑浮点数和0比较的问题, see ObObj::is_zero()
int32_t res = (0 == child_datum->get_float()) ? 0 : 1;
res_datum.set_int32(res);
}
return ret;
}
CHECK_IS_TRUE_FUNC_NAME(double_type)
{
EVAL_ARG()
{
// 不考虑浮点数和0比较的问题, see ObObj::is_zero()
int32_t res = (0 == child_datum->get_double()) ? 0 : 1;
res_datum.set_int32(res);
}
return ret;
}
CHECK_IS_TRUE_FUNC_NAME(other_type)
{
EVAL_ARG()
{
if (ob_is_json(expr.args_[0]->datum_meta_.type_)) {
int cmp_result = 0;
ObString j_str = child_datum->get_string();
ObLobLocatorV2 loc(j_str, expr.args_[0]->obj_meta_.has_lob_header());
if (OB_FAIL(loc.get_inrow_data(j_str))) {
if (ret != OB_ERR_NULL_VALUE) {
COMMON_LOG(WARN, "get lob inrow data failed", K(ret));
}
cmp_result = 1; // outrow json must not be zero
} else if (OB_FAIL(ObJsonExprHelper::is_json_zero(j_str, cmp_result))) {
LOG_WARN("failed: compare json", K(ret));
} else {
res_datum.set_int32(cmp_result);
}
} else {
int32_t res = child_datum->get_number().is_zero() ? 0 : 1;
res_datum.set_int32(res);
}
}
return ret;
}
CHECK_IS_TRUE_FUNC_NAME(decint_type)
{
EVAL_ARG()
{
bool is_zero = false;
switch (get_decimalint_type(expr.args_[0]->datum_meta_.precision_))
{
case common::DECIMAL_INT_32:
is_zero = (*reinterpret_cast<const int32_t *>(child_datum->get_decimal_int()) == 0);
break;
case common::DECIMAL_INT_64:
is_zero = (*reinterpret_cast<const int64_t *>(child_datum->get_decimal_int()) == 0);
break;
case common::DECIMAL_INT_128:
is_zero = (*reinterpret_cast<const int128_t *>(child_datum->get_decimal_int()) == 0);
break;
case common::DECIMAL_INT_256:
is_zero = (*reinterpret_cast<const int256_t *>(child_datum->get_decimal_int()) == 0);
break;
case common::DECIMAL_INT_512:
is_zero = (*reinterpret_cast<const int512_t *>(child_datum->get_decimal_int()) == 0);
break;
default:
ret = OB_ERR_UNEXPECTED;
LOG_WARN("unexpected precision", K(ret), K(expr.args_[0]->datum_meta_));
}
if (OB_FAIL(ret)) {
} else {
res_datum.set_int32(!is_zero);
}
}
return ret;
}
int ObExprBool::cg_expr(ObExprCGCtx &expr_cg_ctx,
const ObRawExpr &raw_expr,
ObExpr &rt_expr) const
{
int ret = OB_SUCCESS;
// 布尔表达式只会在MySQL模式下出现, Oracle模式下中如果AND表达式两边不是布尔语义的
// 在语法解析阶段会报错, 所以resolve时,不会在Oracle模式下增加bool expr
OB_ASSERT(false == lib::is_oracle_mode());
UNUSED(expr_cg_ctx);
UNUSED(raw_expr);
if (OB_UNLIKELY(1 != rt_expr.arg_cnt_) || OB_ISNULL(rt_expr.args_)) {
ret = OB_INVALID_ARGUMENT;
LOG_WARN("arg cnt is invalid or args_ is NULL", K(ret), K(rt_expr));
} else {
const ObDatumMeta child_res_meta = rt_expr.args_[0]->datum_meta_;
switch (child_res_meta.type_) {
case ObTinyIntType:
case ObSmallIntType:
case ObMediumIntType:
case ObInt32Type:
case ObIntType:
case ObUTinyIntType:
case ObUSmallIntType:
case ObUMediumIntType:
case ObUInt32Type:
case ObUInt64Type:
case ObBitType: {
rt_expr.eval_func_ = calc_bool_expr_for_integer_type;
break;
}
case ObFloatType:
case ObUFloatType:{
rt_expr.eval_func_ = calc_bool_expr_for_float_type;
break;
}
case ObDoubleType:
case ObUDoubleType: {
rt_expr.eval_func_ = calc_bool_expr_for_double_type;
break;
}
case ObJsonType: {
rt_expr.eval_func_ = calc_bool_expr_for_other_type;
break;
}
case ObDecimalIntType: {
rt_expr.eval_func_ = calc_bool_expr_for_decint_type;
break;
}
case ObMaxType: {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("bool expr got unexpected type", K(ret), K(child_res_meta));
break;
}
default: {
rt_expr.eval_func_ = calc_bool_expr_for_other_type;
break;
}
}
}
return ret;
}
} // namespace sql
} // namespace oceanbase
#undef EVAL_ARG