126 lines
4.1 KiB
C++
126 lines
4.1 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_timezone.h"
|
|
#include "sql/engine/ob_exec_context.h"
|
|
#include "sql/session/ob_sql_session_info.h"
|
|
#include "share/system_variable/ob_sys_var_class_type.h"
|
|
|
|
using namespace oceanbase::common;
|
|
namespace oceanbase
|
|
{
|
|
namespace sql
|
|
{
|
|
const int64_t ORACLE_SESSIONTIMEZONE_MAX_LENGTH = 75;
|
|
const int64_t ORACLE_DBTIMEZONE_MAX_LENGTH = 6;//[+|-]TZH:TZM
|
|
|
|
|
|
ObExprBaseTimezone::ObExprBaseTimezone(ObIAllocator &alloc, ObExprOperatorType type,
|
|
const char *name, const bool is_sessiontimezone)
|
|
: ObFuncExprOperator(alloc, type, name, 0, NOT_ROW_DIMENSION), is_sessiontimezone_(is_sessiontimezone)
|
|
{
|
|
}
|
|
|
|
int ObExprBaseTimezone::calc_result_type0(ObExprResType &type, ObExprTypeCtx &type_ctx) const
|
|
{
|
|
type.set_varchar();
|
|
type.set_collation_type(type_ctx.get_coll_type());
|
|
type.set_collation_level(CS_LEVEL_IMPLICIT);
|
|
type.set_length(is_sessiontimezone_ ? ORACLE_SESSIONTIMEZONE_MAX_LENGTH : ORACLE_DBTIMEZONE_MAX_LENGTH);
|
|
type.set_length_semantics(OB_NOT_NULL(type_ctx.get_session()) ? type_ctx.get_session()->get_actual_nls_length_semantics(): LS_BYTE);
|
|
return OB_SUCCESS;
|
|
}
|
|
|
|
|
|
ObExprSessiontimezone::ObExprSessiontimezone(ObIAllocator &alloc)
|
|
: ObExprBaseTimezone(alloc, T_FUN_SYS_SESSIONTIMEZONE, N_SESSIONTIMEZONE, true)
|
|
{
|
|
}
|
|
|
|
int ObExprSessiontimezone::eval_session_timezone(const ObExpr &expr, ObEvalCtx &ctx,
|
|
ObDatum &expr_datum)
|
|
{
|
|
int ret = OB_SUCCESS;
|
|
UNUSED(expr);
|
|
const ObBasicSessionInfo *session_info = NULL;
|
|
if (OB_ISNULL(session_info = ctx.exec_ctx_.get_my_session())) {
|
|
ret = OB_ERR_UNEXPECTED;
|
|
LOG_WARN("session info is null", K(ret));
|
|
} else if (OB_ISNULL(session_info->get_tz_info_wrap().get_time_zone_info())) {
|
|
ret = OB_ERR_UNEXPECTED;
|
|
LOG_WARN("time_zone_info is NULL", KPC(session_info), K(ret));
|
|
} else {
|
|
char tmp_buf[ORACLE_SESSIONTIMEZONE_MAX_LENGTH] = {0};
|
|
int64_t pos = 0;
|
|
if (OB_FAIL(session_info->get_tz_info_wrap().get_time_zone_info()->timezone_to_str(
|
|
tmp_buf, ORACLE_SESSIONTIMEZONE_MAX_LENGTH, pos))) {
|
|
LOG_WARN("failed to timezone_to_str",
|
|
"time_zone_info", *(session_info->get_tz_info_wrap().get_time_zone_info()), K(ret));
|
|
} else {
|
|
char *buf = expr.get_str_res_mem(ctx, pos);
|
|
if (OB_ISNULL(buf)) {
|
|
ret = OB_ERR_UNEXPECTED;
|
|
SERVER_LOG(WARN, "buff is null", K(ret));
|
|
} else {
|
|
MEMCPY(buf, tmp_buf, pos);
|
|
expr_datum.set_string(buf, pos);
|
|
}
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int ObExprSessiontimezone::cg_expr(ObExprCGCtx &op_cg_ctx, const ObRawExpr &raw_expr,
|
|
ObExpr &rt_expr) const
|
|
{
|
|
UNUSED(raw_expr);
|
|
UNUSED(op_cg_ctx);
|
|
rt_expr.eval_func_ = ObExprSessiontimezone::eval_session_timezone;
|
|
return OB_SUCCESS;
|
|
}
|
|
|
|
|
|
ObExprDbtimezone::ObExprDbtimezone(ObIAllocator &alloc)
|
|
: ObExprBaseTimezone(alloc, T_FUN_SYS_DBTIMEZONE, N_DBTIMEZONE, false)
|
|
{
|
|
}
|
|
|
|
int ObExprDbtimezone::eval_db_timezone(const ObExpr &expr, ObEvalCtx &ctx,
|
|
ObDatum &expr_datum)
|
|
{
|
|
int ret = OB_SUCCESS;
|
|
const char const_dbtimezone_str[] = "+00:00";
|
|
const size_t const_size = strlen(const_dbtimezone_str);
|
|
char *buf = expr.get_str_res_mem(ctx, const_size);
|
|
if (OB_ISNULL(buf)) {
|
|
ret = OB_ERR_UNEXPECTED;
|
|
SERVER_LOG(WARN, "buff is null", K(ret));
|
|
} else {
|
|
MEMCPY(buf, const_dbtimezone_str, const_size);
|
|
expr_datum.set_string(buf, const_size);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int ObExprDbtimezone::cg_expr(ObExprCGCtx &op_cg_ctx, const ObRawExpr &raw_expr,
|
|
ObExpr &rt_expr) const
|
|
{
|
|
UNUSED(raw_expr);
|
|
UNUSED(op_cg_ctx);
|
|
rt_expr.eval_func_ = ObExprDbtimezone::eval_db_timezone;
|
|
return OB_SUCCESS;
|
|
}
|
|
|
|
}/* ns sql*/
|
|
}/* ns oceanbase */
|