89 lines
2.4 KiB
C++
89 lines
2.4 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 <string.h>
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#include "sql/engine/expr/ob_expr_to_blob.h"
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#include "sql/session/ob_sql_session_info.h"
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#include "objit/common/ob_item_type.h"
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#include "lib/oblog/ob_log.h"
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namespace oceanbase
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{
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using namespace common;
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namespace sql
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{
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ObExprToBlob::ObExprToBlob(ObIAllocator &alloc)
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: ObStringExprOperator(alloc, T_FUN_SYS_TO_BLOB, N_TO_BLOB, 1)
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{
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}
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ObExprToBlob::~ObExprToBlob()
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{
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}
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int ObExprToBlob::calc_result_type1(ObExprResType &type,
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ObExprResType &text,
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common::ObExprTypeCtx &type_ctx) const
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{
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UNUSED(type_ctx);
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int ret = OB_SUCCESS;
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if (ob_is_null(text.get_type())) {
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type.set_null();
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} else if (ob_is_blob(text.get_type(), text.get_collation_type())
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|| ob_is_raw(text.get_type())
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|| ob_is_string_tc(text.get_type())) {
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type.set_blob();
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type.set_collation_type(CS_TYPE_BINARY);
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if (ob_is_string_tc(text.get_type())) {
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text.set_calc_type(common::ObRawType);
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}
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} else {
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ret = OB_ERR_INVALID_TYPE_FOR_OP;
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LOG_WARN("wrong type of argument in function to_blob", K(ret), K(text));
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}
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return ret;
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}
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int ObExprToBlob::eval_to_blob(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_UNLIKELY(1 != expr.arg_cnt_)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("invalid arg cnt or arg res type", K(ret), K(expr.arg_cnt_));
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} else if (OB_FAIL(expr.eval_param_value(ctx, arg))) {
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LOG_WARN("eval param 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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res.set_datum(*arg);
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}
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return ret;
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}
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int ObExprToBlob::cg_expr(
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ObExprCGCtx &expr_cg_ctx, const ObRawExpr &raw_expr, 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_ = eval_to_blob;
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return ret;
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}
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} // end of sql
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} // end of oceanbase
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