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266 lines (253 loc) · 8.54 KB
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/**
* Copyright (c) 2021 OceanBase
* OceanBase CE is licensed under Mulan PubL v2.
* You can use this software according to the terms and conditions of the Mulan PubL v2.
* You may obtain a copy of Mulan PubL v2 at:
* http://license.coscl.org.cn/MulanPubL-2.0
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
* See the Mulan PubL v2 for more details.
*/
#define USING_LOG_PREFIX SQL_ENG
#include "sql/engine/expr/ob_expr_and.h"
#include "lib/oblog/ob_log.h"
#include "share/object/ob_obj_cast.h"
#include "common/object/ob_obj_compare.h"
#include "sql/session/ob_sql_session_info.h"
#include "sql/resolver/expr/ob_raw_expr_deduce_type.h"
namespace oceanbase
{
using namespace common;
namespace sql
{
ObExprAnd::ObExprAnd(ObIAllocator &alloc):
ObLogicalExprOperator(alloc, T_OP_AND, N_AND, PARAM_NUM_UNKNOWN, NOT_ROW_DIMENSION)
{
param_lazy_eval_ = true;
};
// scale以及precision也统一下
int ObExprAnd::calc_result_typeN(ObExprResType &type,
ObExprResType *types_stack,
int64_t param_num,
ObExprTypeCtx &type_ctx) const
{
UNUSED(type_ctx);
int ret = OB_SUCCESS;
if (OB_ISNULL(types_stack)) {
ret = OB_INVALID_ARGUMENT;
LOG_WARN("null types", K(ret));
} else {
for (int64_t i = 0; OB_SUCC(ret) && i < param_num; i++) {
if (types_stack[i].is_ext()) {
ret = OB_ERR_EXPRESSION_WRONG_TYPE;
LOG_WARN("PLS-00382: expression is of wrong type", K(ret), K(types_stack[i].get_type()));
}
}
}
if (OB_SUCC(ret)) {
type.set_type(ObInt32Type);
type.set_precision(DEFAULT_PRECISION_FOR_BOOL);
type.set_scale(DEFAULT_SCALE_FOR_INTEGER);
}
return ret;
}
static int calc_and_expr2(const ObDatum &left, const ObDatum &right,
ObDatum &res)
{
int ret = OB_SUCCESS;
if (left.is_false() || right.is_false()) {
res.set_false();
} else if (left.is_null() || right.is_null()) {
res.set_null();
} else {
res.set_true();
}
return ret;
}
int calc_and_exprN(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res_datum)
{
LOG_DEBUG("calc and common mode");
int ret = OB_SUCCESS;
ObDatum *tmp_res = NULL;
ObDatum *child_res = NULL;
if (OB_FAIL(expr.args_[0]->eval(ctx, tmp_res))) {
LOG_WARN("eval arg 0 failed", K(ret));
} else if (tmp_res->is_null()) {
res_datum.set_null();
} else {
res_datum.set_bool(tmp_res->get_bool());
}
if (OB_SUCC(ret) && !res_datum.is_false()) {
for (int64_t i = 1; OB_SUCC(ret) && i < expr.arg_cnt_; ++i) {
if (OB_FAIL(expr.args_[i]->eval(ctx, child_res))) {
LOG_WARN("eval arg failed", K(ret), K(i));
}
if (OB_SUCC(ret)) {
if (OB_FAIL(calc_and_expr2(res_datum, *child_res, res_datum))) {
LOG_WARN("calc_and_expr2 failed", K(ret), K(i));
} else if (res_datum.is_false()) {
break;
}
}
}
}
return ret;
}
int ObExprAnd::cg_expr(ObExprCGCtx &expr_cg_ctx, const ObRawExpr &raw_expr,
ObExpr &rt_expr) const
{
int ret = OB_SUCCESS;
UNUSED(expr_cg_ctx);
if (OB_ISNULL(rt_expr.args_) || OB_UNLIKELY(2 > rt_expr.arg_cnt_) ||
OB_UNLIKELY(rt_expr.arg_cnt_ != raw_expr.get_param_count())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("args_ is NULL or arg_cnt_ is invalid or raw_expr is invalid",
K(ret), K(rt_expr), K(raw_expr));
} else {
rt_expr.eval_func_ = calc_and_exprN;
rt_expr.eval_batch_func_ = eval_and_batch_exprN;
}
return ret;
}
int ObExprAnd::eval_and_batch_exprN(const ObExpr &expr, ObEvalCtx &ctx,
const ObBitVector &skip, const int64_t batch_size)
{
LOG_DEBUG("eval and batch mode", K(batch_size));
int ret = OB_SUCCESS;
ObDatum* results = expr.locate_batch_datums(ctx);
if (OB_ISNULL(results)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("expr results frame is not init", K(ret));
} else {
ObBitVector &eval_flags = expr.get_evaluated_flags(ctx);
ObBitVector &my_skip = expr.get_pvt_skip(ctx);
my_skip.deep_copy(skip, batch_size);
const int64_t real_param = batch_size - my_skip.accumulate_bit_cnt(batch_size);
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
/*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
*args_[first]需要设置eval flags，设置初始值，为false设置skip
*args_[middle]需要设置非true的result，和false的skip
*args_[last]只需要设置非true的result
*/
//eval first
if (real_param == skip_cnt) {
} else if (OB_FAIL(expr.args_[0]->eval_batch(ctx, my_skip, batch_size))) {
LOG_WARN("failed to eval batch result args0", K(ret));
} else if (expr.args_[0]->is_batch_result()) {
ObDatum *curr_datum = nullptr;
ObDatum *datum_array = expr.args_[0]->locate_batch_datums(ctx);
for (int64_t j = 0; OB_SUCC(ret) && j < batch_size; ++j) {
if (my_skip.at(j)) {
continue;
}
curr_datum = &datum_array[j];
if (curr_datum->is_null()) {
results[j].set_null();
} else if (false == curr_datum->get_bool()) {
results[j].set_bool(false);
my_skip.set(j);
++skip_cnt;
} else {
results[j].set_bool(true);
}
eval_flags.set(j);
}
} else {
ObDatum *curr_datum = &expr.args_[0]->locate_expr_datum(ctx);
for (int64_t j = 0; OB_SUCC(ret) && j < batch_size; ++j) {
if (my_skip.at(j)) {
continue;
}
if (curr_datum->is_null()) {
results[j].set_null();
} else if (false == curr_datum->get_bool()) {
results[j].set_bool(false);
my_skip.set(j);
++skip_cnt;
} else {
results[j].set_bool(true);
}
eval_flags.set(j);
}
}
//eval middle
int64_t arg_idx = 1;
for (; OB_SUCC(ret) && arg_idx < expr.arg_cnt_ - 1 && skip_cnt < real_param; ++arg_idx) {
if (OB_FAIL(expr.args_[arg_idx]->eval_batch(ctx, my_skip, batch_size))) {
LOG_WARN("failed to eval batch result", K(ret), K(arg_idx));
} else if (expr.args_[arg_idx]->is_batch_result()) {
ObDatum *curr_datum = nullptr;
ObDatum *datum_array = expr.args_[arg_idx]->locate_batch_datums(ctx);
for (int64_t j = 0; OB_SUCC(ret) && j < batch_size; ++j) {
if (my_skip.at(j)) {
continue;
}
curr_datum = &datum_array[j];
if (curr_datum->is_null()) {
results[j].set_null();
} else if (false == curr_datum->get_bool()) {
results[j].set_bool(false);
my_skip.set(j);
} else {
//do nothing
}
}
} else {
ObDatum *curr_datum = &expr.args_[arg_idx]->locate_expr_datum(ctx);
for (int64_t j = 0; OB_SUCC(ret) && j < batch_size; ++j) {
if (my_skip.at(j)) {
continue;
}
if (curr_datum->is_null()) {
results[j].set_null();
} else if (false == curr_datum->get_bool()) {
results[j].set_bool(false);
my_skip.set(j);
} else {
//do nothing
}
}
}
}
//eval last
if (OB_FAIL(ret)) {
} else if (real_param == skip_cnt) {
} else if (OB_FAIL(expr.args_[arg_idx]->eval_batch(ctx, my_skip, batch_size))) {
LOG_WARN("failed to eval batch result args0", K(ret));
} else if (expr.args_[arg_idx]->is_batch_result()) {
ObDatum *curr_datum = nullptr;
ObDatum *datum_array = expr.args_[arg_idx]->locate_batch_datums(ctx);
for (int64_t j = 0; OB_SUCC(ret) && j < batch_size; ++j) {
if (my_skip.at(j)) {
continue;
}
curr_datum = &datum_array[j];
if (curr_datum->is_null()) {
results[j].set_null();
} else if (false == curr_datum->get_bool()) {
results[j].set_bool(false);
} else {
//do nothing
}
}
} else {
ObDatum *curr_datum = &expr.args_[arg_idx]->locate_expr_datum(ctx);
for (int64_t j = 0; OB_SUCC(ret) && j < batch_size; ++j) {
if (my_skip.at(j)) {
continue;
}
if (curr_datum->is_null()) {
results[j].set_null();
} else if (false == curr_datum->get_bool()) {
results[j].set_bool(false);
} else {
//do nothing
}
}
}
}
return ret;
}
}
}