255 lines
8.2 KiB
C++
255 lines
8.2 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_and.h"
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#include "lib/oblog/ob_log.h"
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#include "share/object/ob_obj_cast.h"
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#include "common/object/ob_obj_compare.h"
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#include "sql/session/ob_sql_session_info.h"
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#include "sql/resolver/expr/ob_raw_expr_deduce_type.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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ObExprAnd::ObExprAnd(ObIAllocator &alloc):
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ObLogicalExprOperator(alloc, T_OP_AND, N_AND, PARAM_NUM_UNKNOWN, NOT_ROW_DIMENSION)
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{
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param_lazy_eval_ = true;
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};
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// scale以及precision也统一下
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int ObExprAnd::calc_result_typeN(ObExprResType &type,
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ObExprResType *types_stack,
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int64_t param_num,
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ObExprTypeCtx &type_ctx) const
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{
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UNUSED(type_ctx);
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UNUSED(types_stack);
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UNUSED(param_num);
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int ret = OB_SUCCESS;
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type.set_type(ObInt32Type);
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type.set_precision(DEFAULT_PRECISION_FOR_BOOL);
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type.set_scale(DEFAULT_SCALE_FOR_INTEGER);
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return ret;
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}
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static int calc_and_expr2(const ObDatum &left, const ObDatum &right,
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ObDatum &res)
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{
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int ret = OB_SUCCESS;
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if (left.is_false() || right.is_false()) {
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res.set_false();
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} else if (left.is_null() || right.is_null()) {
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res.set_null();
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} else {
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res.set_true();
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}
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return ret;
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}
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int calc_and_exprN(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res_datum)
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{
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LOG_DEBUG("calc and common mode");
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int ret = OB_SUCCESS;
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ObDatum *tmp_res = NULL;
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ObDatum *child_res = NULL;
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if (OB_FAIL(expr.args_[0]->eval(ctx, tmp_res))) {
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LOG_WARN("eval arg 0 failed", K(ret));
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} else if (tmp_res->is_null()) {
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res_datum.set_null();
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} else {
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res_datum.set_bool(tmp_res->get_bool());
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}
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if (OB_SUCC(ret) && !res_datum.is_false()) {
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for (int64_t i = 1; OB_SUCC(ret) && i < expr.arg_cnt_; ++i) {
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if (OB_FAIL(expr.args_[i]->eval(ctx, child_res))) {
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LOG_WARN("eval arg failed", K(ret), K(i));
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}
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if (OB_SUCC(ret)) {
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if (OB_FAIL(calc_and_expr2(res_datum, *child_res, res_datum))) {
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LOG_WARN("calc_and_expr2 failed", K(ret), K(i));
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} else if (res_datum.is_false()) {
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break;
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}
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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 ObExprAnd::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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if (OB_ISNULL(rt_expr.args_) || OB_UNLIKELY(2 > rt_expr.arg_cnt_) ||
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OB_UNLIKELY(rt_expr.arg_cnt_ != raw_expr.get_param_count())) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("args_ is NULL or arg_cnt_ is invalid or raw_expr is invalid",
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K(ret), K(rt_expr), K(raw_expr));
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} else {
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rt_expr.eval_func_ = calc_and_exprN;
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rt_expr.eval_batch_func_ = eval_and_batch_exprN;
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}
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return ret;
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}
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int ObExprAnd::eval_and_batch_exprN(const ObExpr &expr, ObEvalCtx &ctx,
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const ObBitVector &skip, const int64_t batch_size)
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{
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LOG_DEBUG("eval and 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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if (OB_ISNULL(results)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("expr results frame is not init", K(ret));
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} else {
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ObBitVector &eval_flags = expr.get_evaluated_flags(ctx);
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ObBitVector &my_skip = expr.get_pvt_skip(ctx);
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my_skip.deep_copy(skip, batch_size);
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const int64_t real_param = batch_size - my_skip.accumulate_bit_cnt(batch_size);
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int64_t skip_cnt = 0; //记录一个batch中skip的数量， 所有参数被skip即可结束
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/*为省略对results的初始化操作以及减少对my_skip的写入，分成3段求值
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*args_[first]需要设置eval flags，设置初始值，为false设置skip
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*args_[middle]需要设置非true的result，和false的skip
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*args_[last]只需要设置非true的result
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*/
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//eval first
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if (real_param == skip_cnt) {
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} else if (OB_FAIL(expr.args_[0]->eval_batch(ctx, my_skip, batch_size))) {
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LOG_WARN("failed to eval batch result args0", K(ret));
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} else if (expr.args_[0]->is_batch_result()) {
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ObDatum *curr_datum = nullptr;
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ObDatum *datum_array = expr.args_[0]->locate_batch_datums(ctx);
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for (int64_t j = 0; OB_SUCC(ret) && j < batch_size; ++j) {
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if (my_skip.at(j)) {
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continue;
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}
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curr_datum = &datum_array[j];
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if (curr_datum->is_null()) {
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results[j].set_null();
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} else if (false == curr_datum->get_bool()) {
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results[j].set_bool(false);
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my_skip.set(j);
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++skip_cnt;
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} else {
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results[j].set_bool(true);
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}
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eval_flags.set(j);
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}
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} else {
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ObDatum *curr_datum = &expr.args_[0]->locate_expr_datum(ctx);
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for (int64_t j = 0; OB_SUCC(ret) && j < batch_size; ++j) {
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if (my_skip.at(j)) {
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continue;
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}
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if (curr_datum->is_null()) {
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results[j].set_null();
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} else if (false == curr_datum->get_bool()) {
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results[j].set_bool(false);
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my_skip.set(j);
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++skip_cnt;
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} else {
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results[j].set_bool(true);
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}
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eval_flags.set(j);
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}
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}
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//eval middle
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int64_t arg_idx = 1;
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for (; OB_SUCC(ret) && arg_idx < expr.arg_cnt_ - 1 && skip_cnt < real_param; ++arg_idx) {
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if (OB_FAIL(expr.args_[arg_idx]->eval_batch(ctx, my_skip, batch_size))) {
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LOG_WARN("failed to eval batch result", K(ret), K(arg_idx));
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} else if (expr.args_[arg_idx]->is_batch_result()) {
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ObDatum *curr_datum = nullptr;
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ObDatum *datum_array = expr.args_[arg_idx]->locate_batch_datums(ctx);
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for (int64_t j = 0; OB_SUCC(ret) && j < batch_size; ++j) {
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if (my_skip.at(j)) {
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continue;
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}
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curr_datum = &datum_array[j];
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if (curr_datum->is_null()) {
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results[j].set_null();
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} else if (false == curr_datum->get_bool()) {
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results[j].set_bool(false);
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my_skip.set(j);
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} else {
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//do nothing
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}
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}
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} else {
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ObDatum *curr_datum = &expr.args_[arg_idx]->locate_expr_datum(ctx);
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for (int64_t j = 0; OB_SUCC(ret) && j < batch_size; ++j) {
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if (my_skip.at(j)) {
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continue;
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}
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if (curr_datum->is_null()) {
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results[j].set_null();
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} else if (false == curr_datum->get_bool()) {
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results[j].set_bool(false);
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my_skip.set(j);
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} else {
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//do nothing
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}
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}
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}
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}
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//eval last
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if (OB_FAIL(ret)) {
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} else if (real_param == skip_cnt) {
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} else if (OB_FAIL(expr.args_[arg_idx]->eval_batch(ctx, my_skip, batch_size))) {
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LOG_WARN("failed to eval batch result args0", K(ret));
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} else if (expr.args_[arg_idx]->is_batch_result()) {
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ObDatum *curr_datum = nullptr;
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ObDatum *datum_array = expr.args_[arg_idx]->locate_batch_datums(ctx);
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for (int64_t j = 0; OB_SUCC(ret) && j < batch_size; ++j) {
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if (my_skip.at(j)) {
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continue;
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}
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curr_datum = &datum_array[j];
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if (curr_datum->is_null()) {
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results[j].set_null();
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} else if (false == curr_datum->get_bool()) {
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results[j].set_bool(false);
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} else {
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//do nothing
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}
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}
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} else {
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ObDatum *curr_datum = &expr.args_[arg_idx]->locate_expr_datum(ctx);
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for (int64_t j = 0; OB_SUCC(ret) && j < batch_size; ++j) {
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if (my_skip.at(j)) {
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continue;
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}
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if (curr_datum->is_null()) {
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results[j].set_null();
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} else if (false == curr_datum->get_bool()) {
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results[j].set_bool(false);
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} else {
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//do nothing
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}
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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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}
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}
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