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235
src/sql/engine/expr/ob_expr_tz_offset.cpp
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235
src/sql/engine/expr/ob_expr_tz_offset.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_tz_offset.h"
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#include "sql/engine/expr/ob_expr_util.h"
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#include "lib/time/ob_time_utility.h"
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#include "lib/ob_name_def.h"
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#include "sql/session/ob_sql_session_info.h"
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#include "sql/engine/ob_exec_context.h"
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#include "lib/timezone/ob_time_convert.h"
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namespace oceanbase {
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using namespace common;
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namespace sql {
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const int64_t ORACLE_TZ_OFFSET_MAX_LENGTH = 7; //[+|-]TZH:TZM
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ObExprTzOffset::ObExprTzOffset(ObIAllocator& alloc)
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: ObFuncExprOperator(alloc, T_FUN_SYS_TZ_OFFSET, N_TZ_OFFSET, 1, NOT_ROW_DIMENSION)
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{}
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int ObExprTzOffset::calc_result_type1(ObExprResType& type, ObExprResType& input, common::ObExprTypeCtx& type_ctx) const
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{
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int ret = OB_SUCCESS;
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if (OB_UNLIKELY(!input.is_varchar_or_char() && !input.is_null())) {
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ret = common::OB_ERR_INVALID_TYPE_FOR_ARGUMENT;
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LOG_WARN("invalid type", K(input.get_type()));
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} else {
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CK(OB_NOT_NULL(type_ctx.get_session()));
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if (OB_SUCC(ret)) {
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type.set_varchar();
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type.set_collation_type(type_ctx.get_session()->get_nls_collation());
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type.set_collation_level(CS_LEVEL_IMPLICIT);
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type.set_length(ORACLE_TZ_OFFSET_MAX_LENGTH);
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type.set_length_semantics(type_ctx.get_session()->get_actual_nls_length_semantics());
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input.set_calc_type(ObVarcharType);
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input.set_calc_collation_type(ObCharset::get_system_collation());
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input.set_calc_collation_level(CS_LEVEL_IMPLICIT);
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}
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}
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return ret;
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}
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int ObExprTzOffset::calc_result1(common::ObObj& result, const common::ObObj& input, ObExprCtx& expr_ctx) const
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{
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int ret = OB_SUCCESS;
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if (OB_ISNULL(expr_ctx.my_session_) || OB_ISNULL(expr_ctx.calc_buf_)) {
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ret = OB_INVALID_ARGUMENT;
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LOG_WARN("argument is invalid_", K(expr_ctx.my_session_), K(ret));
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} else if (OB_UNLIKELY(input.is_null())) {
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result.set_null();
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} else if (OB_UNLIKELY(!input.is_varchar())) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("input is not varchar", K(input), K(ret));
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} else if (input.get_varchar().empty()) {
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result.set_null();
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} else {
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ObString input_string = input.get_varchar().trim();
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int32_t offset_sec = 0;
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int32_t offset_min = 0;
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int ret_more = OB_SUCCESS;
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if (OB_FAIL(ObTimeConverter::str_to_offset(input_string, offset_sec, ret_more, is_oracle_mode(), true))) {
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if (ret != OB_ERR_UNKNOWN_TIME_ZONE) {
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LOG_WARN("fail to convert str_to_offset", K(input_string), K(ret));
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} else if (ret_more != OB_SUCCESS) {
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ret = ret_more;
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LOG_WARN("invalid time zone hour or minute", K(input_string), K(ret));
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}
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} else {
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offset_min = offset_sec / SECS_PER_MIN;
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}
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if (OB_ERR_UNKNOWN_TIME_ZONE == ret) {
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ObTime ob_time(DT_TYPE_ORACLE_TTZ);
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MEMCPY(ob_time.tz_name_, input_string.ptr(), input_string.length());
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ob_time.tz_name_[input_string.length()] = '\0';
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ob_time.is_tz_name_valid_ = true;
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int64_t ts_value = ObTimeUtility::current_time();
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ObTimeConvertCtx cvrt_ctx(TZ_INFO(expr_ctx.my_session_), true);
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ObOTimestampData tmp_ot_data;
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tmp_ot_data.time_ctx_.tz_desc_ = 0;
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tmp_ot_data.time_ctx_.store_tz_id_ = 0;
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tmp_ot_data.time_us_ = ObTimeUtility::current_time();
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if (OB_FAIL(ObTimeConverter::otimestamp_to_ob_time(ObTimestampLTZType, tmp_ot_data, NULL, ob_time))) {
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LOG_WARN("failed to convert otimestamp_to_ob_time", K(ret));
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} else if (OB_FAIL(ObTimeConverter::str_to_tz_offset(cvrt_ctx, ob_time))) {
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LOG_WARN("failed to convert string to tz_offset", K(ret));
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} else {
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offset_min = ob_time.parts_[DT_OFFSET_MIN];
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LOG_DEBUG("finish str_to_tz_offset", K(ob_time), K(tmp_ot_data));
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}
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}
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if (OB_SUCC(ret)) {
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char const_dbtimezone_str[ORACLE_TZ_OFFSET_MAX_LENGTH] = {0};
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char* res_ptr = NULL;
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int64_t pos = 0;
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const char* fmt_str = (offset_min < 0 ? "-%02d:%02d" : "+%02d:%02d");
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if (OB_ISNULL(res_ptr = static_cast<char*>(expr_ctx.calc_buf_->alloc(ORACLE_TZ_OFFSET_MAX_LENGTH)))) {
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ret = OB_ALLOCATE_MEMORY_FAILED;
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LOG_WARN("Failed to alloc", "size", ORACLE_TZ_OFFSET_MAX_LENGTH, K(ret));
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} else if (OB_FAIL(databuff_printf(
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res_ptr, ORACLE_TZ_OFFSET_MAX_LENGTH, pos, fmt_str, abs(offset_min) / 60, abs(offset_min) % 60))) {
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LOG_WARN("Failed to databuff_printf", K(offset_min), K(ret));
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} else {
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result.set_varchar(res_ptr, pos);
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result.set_collation(result_type_);
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}
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}
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}
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return ret;
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}
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int ObExprTzOffset::eval_tz_offset_val(
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const ObString& in_tz_str, ObSQLSessionInfo& my_session, ObIAllocator& alloc, ObString& res_str)
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{
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int ret = OB_SUCCESS;
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ObString trimed_tz_str = in_tz_str;
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trimed_tz_str = trimed_tz_str.trim();
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int32_t offset_sec = 0;
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int32_t offset_min = 0;
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int ret_more = OB_SUCCESS;
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if (OB_FAIL(ObTimeConverter::str_to_offset(trimed_tz_str, offset_sec, ret_more, is_oracle_mode(), true))) {
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if (ret != OB_ERR_UNKNOWN_TIME_ZONE) {
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LOG_WARN("fail to convert str_to_offset", K(trimed_tz_str), K(ret));
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} else if (ret_more != OB_SUCCESS) {
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ret = ret_more;
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LOG_WARN("invalid time zone hour or minute", K(trimed_tz_str), K(ret));
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}
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} else {
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offset_min = offset_sec / SECS_PER_MIN;
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}
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if (OB_ERR_UNKNOWN_TIME_ZONE == ret) {
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ObTime ob_time(DT_TYPE_ORACLE_TTZ);
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MEMCPY(ob_time.tz_name_, trimed_tz_str.ptr(), trimed_tz_str.length());
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ob_time.tz_name_[trimed_tz_str.length()] = '\0';
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ob_time.is_tz_name_valid_ = true;
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int64_t ts_value = ObTimeUtility::current_time();
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ObTimeConvertCtx cvrt_ctx(TZ_INFO(&my_session), true);
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ObOTimestampData tmp_ot_data;
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tmp_ot_data.time_ctx_.tz_desc_ = 0;
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tmp_ot_data.time_ctx_.store_tz_id_ = 0;
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tmp_ot_data.time_us_ = ObTimeUtility::current_time();
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if (OB_FAIL(ObTimeConverter::otimestamp_to_ob_time(ObTimestampLTZType, tmp_ot_data, NULL, ob_time))) {
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LOG_WARN("failed to convert otimestamp_to_ob_time", K(ret));
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} else if (OB_FAIL(ObTimeConverter::str_to_tz_offset(cvrt_ctx, ob_time))) {
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LOG_WARN("failed to convert string to tz_offset", K(ret));
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} else {
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offset_min = ob_time.parts_[DT_OFFSET_MIN];
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LOG_DEBUG("finish str_to_tz_offset", K(ob_time), K(tmp_ot_data));
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}
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}
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if (OB_SUCC(ret)) {
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char const_dbtimezone_str[ORACLE_TZ_OFFSET_MAX_LENGTH] = {0};
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char* res_ptr = NULL;
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int64_t pos = 0;
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const char* fmt_str = (offset_min < 0 ? "-%02d:%02d" : "+%02d:%02d");
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if (OB_ISNULL(res_ptr = static_cast<char*>(alloc.alloc(ORACLE_TZ_OFFSET_MAX_LENGTH)))) {
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ret = OB_ALLOCATE_MEMORY_FAILED;
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LOG_WARN("Failed to alloc", "size", ORACLE_TZ_OFFSET_MAX_LENGTH, K(ret));
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} else if (OB_FAIL(databuff_printf(
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res_ptr, ORACLE_TZ_OFFSET_MAX_LENGTH, pos, fmt_str, abs(offset_min) / 60, abs(offset_min) % 60))) {
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LOG_WARN("Failed to databuff_printf", K(offset_min), K(ret));
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} else {
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res_str.assign_ptr(res_ptr, pos);
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}
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}
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return ret;
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}
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int ObExprTzOffset::eval_tz_offset(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& res)
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{
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int ret = OB_SUCCESS;
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ObDatum* tz = NULL;
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if (OB_FAIL(expr.eval_param_value(ctx, tz))) {
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LOG_WARN("eval param_value failed", K(ret));
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} else if (tz->is_null()) {
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res.set_null();
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} else {
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const ObString& tz_str = tz->get_string();
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ObString res_str_utf8;
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ObString res_str;
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ObIAllocator& calc_alloc = ctx.get_reset_tmp_alloc();
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ObExprStrResAlloc res_alloc(expr, ctx);
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const ObCollationType out_cs_type = expr.datum_meta_.cs_type_;
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CK(OB_NOT_NULL(ctx.exec_ctx_.get_my_session()));
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if (OB_FAIL(ret)) {
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} else if (OB_FAIL(eval_tz_offset_val(tz_str, *ctx.exec_ctx_.get_my_session(), calc_alloc, res_str_utf8))) {
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LOG_WARN("eval_tz_offset_val failed", K(ret), K(tz_str));
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} else if (OB_FAIL(ObExprUtil::convert_string_collation(
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res_str_utf8, ObCharset::get_system_collation(), res_str, out_cs_type, calc_alloc))) {
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LOG_WARN("convert string coll failed", K(ret), K(res_str_utf8), K(out_cs_type));
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} else if (ObExprUtil::deep_copy_str(res_str, res_str, res_alloc)) {
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LOG_WARN("copy str failed", K(ret));
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} else {
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res.set_string(res_str);
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}
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}
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return ret;
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}
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int ObExprTzOffset::cg_expr(ObExprCGCtx& expr_cg_ctx, const ObRawExpr& raw_expr, ObExpr& expr) const
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{
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int ret = OB_SUCCESS;
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UNUSED(expr_cg_ctx);
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UNUSED(raw_expr);
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CK(1 == expr.arg_cnt_);
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CK(OB_NOT_NULL(expr.args_) && OB_NOT_NULL(expr.args_[0]));
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CK(ob_is_varchar_or_char(expr.args_[0]->datum_meta_.type_, expr.args_[0]->datum_meta_.cs_type_));
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CK(ob_is_varchar_or_char(expr.datum_meta_.type_, expr.datum_meta_.cs_type_));
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OX(expr.eval_func_ = eval_tz_offset);
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return ret;
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}
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} // namespace sql
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} // namespace oceanbase
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