139 lines
4.4 KiB
C++
139 lines
4.4 KiB
C++
/**
|
|
* 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_lengthb.h"
|
|
#include "sql/engine/expr/ob_expr_util.h"
|
|
#include <string.h>
|
|
#include "lib/oblog/ob_log.h"
|
|
#include "share/object/ob_obj_cast.h"
|
|
#include "objit/common/ob_item_type.h"
|
|
//#include "sql/engine/expr/ob_expr_promotion_util.h"
|
|
#include "sql/session/ob_sql_session_info.h"
|
|
|
|
namespace oceanbase
|
|
{
|
|
using namespace common;
|
|
namespace sql
|
|
{
|
|
|
|
ObExprLengthb::ObExprLengthb(ObIAllocator &alloc)
|
|
: ObFuncExprOperator(alloc, T_FUN_SYS_LENGTHB, N_LENGTHB, 1, VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
|
|
{
|
|
}
|
|
|
|
ObExprLengthb::~ObExprLengthb()
|
|
{
|
|
}
|
|
|
|
int ObExprLengthb::calc_result_type1(ObExprResType &type, ObExprResType &text,
|
|
ObExprTypeCtx &type_ctx) const
|
|
{
|
|
int ret = OB_SUCCESS;
|
|
const ObSQLSessionInfo *session = type_ctx.get_session();
|
|
if (OB_ISNULL(session)) {
|
|
ret = OB_ERR_UNEXPECTED;
|
|
LOG_WARN("session is NULL", K(ret));
|
|
} else {
|
|
const ObAccuracy &acc =
|
|
ObAccuracy::DDL_DEFAULT_ACCURACY2[common::ORACLE_MODE][common::ObNumberType];
|
|
type.set_number();
|
|
type.set_scale(acc.get_scale());
|
|
type.set_precision(acc.get_precision());
|
|
if (!text.is_string_type()) {
|
|
text.set_calc_type(ObVarcharType);
|
|
text.set_calc_collation_type(session->get_nls_collation());
|
|
text.set_calc_collation_level(CS_LEVEL_IMPLICIT);
|
|
}
|
|
if (text.get_calc_meta().is_text()) {
|
|
ret = OB_CLOB_ONLY_SUPPORT_WITH_MULTIBYTE_FUN;
|
|
LOG_WARN("CLOB or NCLOB in multibyte character set not supported", K(text), K(ret));
|
|
LOG_USER_ERROR(OB_CLOB_ONLY_SUPPORT_WITH_MULTIBYTE_FUN);
|
|
}
|
|
OX(ObExprOperator::calc_result_flag1(type, text));
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int ObExprLengthb::calc(ObObj &result, const ObObj &text, ObExprCtx &expr_ctx)
|
|
{
|
|
int ret = OB_SUCCESS;
|
|
ObObjTypeClass type_class = ob_obj_type_class(text.get_type());
|
|
if (text.is_text()) {
|
|
ret = OB_CLOB_ONLY_SUPPORT_WITH_MULTIBYTE_FUN;
|
|
LOG_WARN("CLOB or NCLOB in multibyte character set not supported", K(text), K(ret));
|
|
LOG_USER_ERROR(OB_CLOB_ONLY_SUPPORT_WITH_MULTIBYTE_FUN);
|
|
result.set_null();
|
|
} else if (!ob_is_castable_type_class(type_class)) {
|
|
result.set_null();
|
|
} else {
|
|
ObString m_text = text.get_string();
|
|
number::ObNumber num;
|
|
if (OB_FAIL(num.from(static_cast<int64_t>(m_text.length()), *(expr_ctx.calc_buf_)))) {
|
|
LOG_WARN("copy number fail", K(ret));
|
|
} else {
|
|
result.set_number(num);
|
|
}
|
|
}
|
|
UNUSED(expr_ctx);
|
|
return ret;
|
|
}
|
|
|
|
int ObExprLengthb::calc_lengthb_expr(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res_datum)
|
|
{
|
|
int ret = OB_SUCCESS;
|
|
if (OB_UNLIKELY(1 != expr.arg_cnt_)) {
|
|
ret = OB_ERR_UNEXPECTED;
|
|
LOG_WARN("unexpected arg cnt", K(ret), K(expr.arg_cnt_));
|
|
} else {
|
|
ObDatum *arg0 = NULL;
|
|
ObObjTypeClass type_class = ob_obj_type_class(expr.args_[0]->datum_meta_.type_);
|
|
if (OB_FAIL(expr.eval_param_value(ctx, arg0))) {
|
|
LOG_WARN("eval_param_value failed", K(ret));
|
|
} else if (arg0->is_null() || !ob_is_castable_type_class(type_class)) {
|
|
res_datum.set_null();
|
|
} else {
|
|
int64_t byte_len = static_cast<int64_t>(arg0->len_);
|
|
if (ob_is_text_tc(expr.args_[0]->datum_meta_.type_)) {
|
|
ObLobLocatorV2 locator(arg0->get_string(), expr.args_[0]->obj_meta_.has_lob_header());
|
|
if (OB_FAIL(locator.get_lob_data_byte_len(byte_len))) {
|
|
LOG_WARN("get lob data byte length failed", K(ret));
|
|
}
|
|
}
|
|
number::ObNumber num;
|
|
ObNumStackOnceAlloc tmp_alloc;
|
|
if (OB_FAIL(ret)) {
|
|
} else if (OB_FAIL(num.from(byte_len, tmp_alloc))) {
|
|
LOG_WARN("copy number fail", K(ret));
|
|
} else {
|
|
res_datum.set_number(num);
|
|
}
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int ObExprLengthb::cg_expr(ObExprCGCtx &expr_cg_ctx, const ObRawExpr &raw_expr,
|
|
ObExpr &rt_expr) const
|
|
{
|
|
int ret = OB_SUCCESS;
|
|
UNUSED(expr_cg_ctx);
|
|
UNUSED(raw_expr);
|
|
rt_expr.eval_func_ = calc_lengthb_expr;
|
|
return ret;
|
|
}
|
|
|
|
}
|
|
}
|