hcq/oceanbase
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

init push

Browse Source
This commit is contained in:
oceanbase-admin
2021-05-31 22:56:52 +08:00
commit cea7de1475
7020 changed files with 5689869 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

168
src/sql/engine/expr/ob_expr_timezone.cpp Normal file
View File

@ -0,0 +1,168 @@
/**
* 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::calc_result0(ObObj& result, ObExprCtx& expr_ctx) const
{
int ret = OB_SUCCESS;
const ObSQLSessionInfo* session_info = NULL;
char tmp_buf[ORACLE_SESSIONTIMEZONE_MAX_LENGTH] = {0};
char* res_ptr = NULL;
int64_t pos = 0;
if (OB_ISNULL(session_info = expr_ctx.my_session_) || OB_ISNULL(expr_ctx.calc_buf_)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("ObSQLSessionInfo or calc_buf_ is NULL", KP(expr_ctx.calc_buf_), 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 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 if (OB_ISNULL(res_ptr = static_cast<char*>(expr_ctx.calc_buf_->alloc(pos)))) {
ret = OB_ALLOCATE_MEMORY_FAILED;
LOG_WARN("Failed to alloc", K(pos), K(ret));
} else {
MEMCPY(res_ptr, tmp_buf, pos);
result.set_varchar(res_ptr, pos);
result.set_collation(result_type_);
}
return OB_SUCCESS;
}
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::calc_result0(ObObj& result, ObExprCtx& expr_ctx) const
{
int ret = OB_SUCCESS;
const ObSQLSessionInfo* session_info = NULL;
const char const_dbtimezone_str[] = "+00:00";
const size_t const_size = strlen(const_dbtimezone_str);
char* res_ptr = NULL;
if (OB_ISNULL(expr_ctx.calc_buf_)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("calc_buf_ is NULL", K(ret));
} else if (OB_ISNULL(res_ptr = static_cast<char*>(expr_ctx.calc_buf_->alloc(const_size)))) {
ret = OB_ALLOCATE_MEMORY_FAILED;
LOG_WARN("Failed to alloc", K(const_size), K(ret));
} else {
MEMCPY(res_ptr, const_dbtimezone_str, const_size);
result.set_varchar(res_ptr, const_size);
result.set_collation(result_type_);
}
return OB_SUCCESS;
}
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);
int32_t pos = 0;
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;
}
} // namespace sql
} // namespace oceanbase