90 lines
3.0 KiB
C++
90 lines
3.0 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_nvl2_oracle.h"
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namespace oceanbase
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{
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namespace sql
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{
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using namespace oceanbase::common;
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ObExprNvl2Oracle::ObExprNvl2Oracle(ObIAllocator &alloc)
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: ObFuncExprOperator(alloc, T_FUN_NVL2, N_NVL2, 3, VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
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{
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}
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ObExprNvl2Oracle::~ObExprNvl2Oracle()
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{}
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int ObExprNvl2Oracle::calc_result_type3(ObExprResType &type,
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ObExprResType &type1,
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ObExprResType &type2,
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ObExprResType &type3,
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common::ObExprTypeCtx &type_ctx) const
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{
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UNUSED(type1);
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// nvl2 reference: https://docs.oracle.com/database/121/SQLRF/functions132.htm#SQLRF00685
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// the expr1 can have any data type
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// the type of expr1 and expr2 can't be LONG, but now ob doesn't support the LONG type.
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return ObExprOracleNvl::calc_nvl_oralce_result_type(type, type2, type3, type_ctx);
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}
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int ObExprNvl2Oracle::calc_nvl2_oracle_expr_batch(const ObExpr &expr,
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ObEvalCtx &ctx,
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const ObBitVector &skip,
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const int64_t batch_size) {
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LOG_DEBUG("eval nvl2 oracle batch mode", K(batch_size));
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int ret = OB_SUCCESS;
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ObDatum* results = expr.locate_batch_datums(ctx);
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ObBitVector &eval_flags = expr.get_evaluated_flags(ctx);
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ObDatumVector args0;
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ObDatumVector args1;
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ObDatumVector args2;
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if (OB_FAIL(expr.eval_batch_param_value(ctx, skip, batch_size, args0,
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args1, args2))) {
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LOG_WARN("eval batch args failed", K(ret));
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} else {
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for (int64_t i = 0; OB_SUCC(ret) && i < batch_size; ++i) {
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if (skip.at(i) || eval_flags.at(i)) {
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continue;
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}
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eval_flags.set(i);
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ObDatum *arg0 = args0.at(i);
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ObDatum *arg1 = args1.at(i);
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ObDatum *arg2 = args2.at(i);
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if (!(arg0->is_null())) {
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results[i].set_datum(*arg1);
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} else {
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results[i].set_datum(*arg2);
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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 ObExprNvl2Oracle::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_ = ObExprNvlUtil::calc_nvl_expr2;
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rt_expr.eval_batch_func_ = calc_nvl2_oracle_expr_batch;
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return ret;
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}
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} // namespace sql
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} // namespqce oceanbase
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