95 lines
2.7 KiB
C++
95 lines
2.7 KiB
C++
/**
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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_vsize.h"
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#include "sql/engine/expr/ob_expr_util.h"
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#include "objit/common/ob_item_type.h"
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#include "share/object/ob_obj_cast.h"
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using namespace oceanbase::common;
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using namespace oceanbase::sql;
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namespace oceanbase
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{
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namespace sql
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{
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}
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}
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ObExprVsize::ObExprVsize(ObIAllocator &alloc)
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:ObFuncExprOperator(alloc, T_FUN_SYS_VSIZE, N_VSIZE, 1, NOT_ROW_DIMENSION)
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{
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}
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ObExprVsize::~ObExprVsize()
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{
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}
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bool ObExprVsize::is_blob_type(const ObObj &input) const
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{
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return input.meta_.is_clob()
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|| input.meta_.is_blob()
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|| input.meta_.is_lob();
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}
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int ObExprVsize::calc_result_type1(ObExprResType &type,
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ObExprResType &type1,
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common::ObExprTypeCtx &type_ctx) const
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{
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UNUSED(type1);
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UNUSED(type_ctx);
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int ret = OB_SUCCESS;
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if (OB_UNLIKELY(type1.is_lob())){
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// consistent to oracle error code;
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ret = OB_ERR_INVALID_TYPE_FOR_OP;
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LOG_WARN("inconsistent datatypes.", K(ret));
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} else {
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type.set_number();
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type.set_scale(common::ObAccuracy::DDL_DEFAULT_ACCURACY[common::ObNumberType].scale_);
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type.set_precision(common::ObAccuracy::DDL_DEFAULT_ACCURACY[common::ObNumberType].precision_);
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type.set_calc_type(common::ObNumberType);
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}
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return ret;
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}
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int ObExprVsize::calc_vsize_expr(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res)
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{
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int ret = OB_SUCCESS;
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ObDatum *arg = NULL;
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if (OB_FAIL(expr.eval_param_value(ctx, arg))) {
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LOG_WARN("eval arg failed", K(ret));
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} else if (arg->is_null()) {
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res.set_null();
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} else {
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number::ObNumber res_nmb;
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ObNumStackOnceAlloc res_alloc;
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ret = res_nmb.from(static_cast<uint64_t>(arg->len_), res_alloc);
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if (OB_FAIL(ret)) {
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LOG_WARN("generator vsize result failed.", K(ret));
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} else {
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res.set_number(res_nmb);
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}
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}
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return ret;
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}
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int ObExprVsize::cg_expr(ObExprCGCtx &expr_cg_ctx, const ObRawExpr &raw_expr,
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ObExpr &rt_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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rt_expr.eval_func_ = calc_vsize_expr;
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return ret;
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}
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