471 lines
14 KiB
C++
471 lines
14 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_RESV
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#include "ob_raw_expr_replacer.h"
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using namespace oceanbase::sql;
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using namespace oceanbase::common;
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namespace oceanbase
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{
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namespace sql
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{
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ObRawExprReplacer::ObRawExprReplacer()
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: replace_happened_(false), skip_bool_param_mysql_(false)
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{}
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ObRawExprReplacer::~ObRawExprReplacer()
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{}
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void ObRawExprReplacer::destroy()
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{
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if (to_exprs_.created()) {
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to_exprs_.destroy();
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}
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if (expr_replace_map_.created()) {
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expr_replace_map_.destroy();
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}
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}
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int ObRawExprReplacer::replace(ObRawExpr *&expr)
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{
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int ret = OB_SUCCESS;
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ObRawExpr *new_expr = NULL;
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bool need_replace = false;
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if (OB_ISNULL(expr)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("unexpected null expr", K(ret));
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} else if (OB_FAIL(check_need_replace(expr, new_expr, need_replace))) {
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LOG_WARN("failed to check need replace", K(ret));
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} else if (need_replace) {
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expr = new_expr;
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replace_happened_ = true;
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} else if (OB_FAIL(expr->preorder_accept(*this))) {
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LOG_WARN("failed to preorder accept expr", K(ret));
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}
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return ret;
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}
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int ObRawExprReplacer::visit(ObConstRawExpr &expr)
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{
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UNUSED(expr);
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return OB_SUCCESS;
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}
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int ObRawExprReplacer::visit(ObExecParamRawExpr &expr)
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{
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UNUSED(expr);
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return OB_SUCCESS;
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}
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int ObRawExprReplacer::visit(ObVarRawExpr &expr)
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{
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UNUSED(expr);
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return OB_SUCCESS;
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}
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int ObRawExprReplacer::visit(ObOpPseudoColumnRawExpr &expr)
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{
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UNUSED(expr);
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return OB_SUCCESS;
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}
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int ObRawExprReplacer::visit(ObQueryRefRawExpr &expr)
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{
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int ret = OB_SUCCESS;
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bool skip_expr = false;
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if (OB_FAIL(check_skip_expr(expr, skip_expr))) {
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LOG_WARN("failed to check skip expr");
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} else if (!skip_expr) {
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ObRawExpr *new_expr = NULL;
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bool need_replace = false;
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int64_t count = expr.get_param_count();
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for (int64_t i = 0; OB_SUCC(ret) && i < count; ++i) {
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if (OB_FAIL(check_need_replace(expr.get_param_expr(i), new_expr, need_replace))) {
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LOG_WARN("failed to check need replace", K(ret));
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} else if (need_replace) {
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expr.get_param_expr(i) = new_expr;
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replace_happened_ = true;
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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 ObRawExprReplacer::visit(ObPlQueryRefRawExpr &expr)
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{
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UNUSED(expr);
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return OB_SUCCESS;
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}
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int ObRawExprReplacer::visit(ObColumnRefRawExpr &expr)
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{
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UNUSED(expr);
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return OB_SUCCESS;
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}
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int ObRawExprReplacer::visit(ObOpRawExpr &expr)
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{
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int ret = OB_SUCCESS;
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bool skip_expr = false;
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if (OB_FAIL(check_skip_expr(expr, skip_expr))) {
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LOG_WARN("failed to check skip expr");
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} else if (!skip_expr) {
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ObRawExpr *new_expr = NULL;
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bool need_replace = false;
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int64_t count = expr.get_param_count();
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for (int64_t i = 0; OB_SUCC(ret) && i < count; ++i) {
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if (OB_FAIL(check_need_replace(expr.get_param_expr(i), new_expr, need_replace))) {
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LOG_WARN("failed to check need replace", K(ret));
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} else if (is_skip_bool_param_mysql()) {
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if (T_OP_IS == expr.get_expr_type() && i == 1) {
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//do nothing
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} else if (T_OP_IS_NOT == expr.get_expr_type() && i == 1) {
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//do nothing
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} else if (need_replace) {
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ret = expr.replace_param_expr(i, new_expr);
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replace_happened_ = true;
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}
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} else if (need_replace) {
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ret = expr.replace_param_expr(i, new_expr);
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replace_happened_ = true;
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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 ObRawExprReplacer::visit(ObAliasRefRawExpr &expr)
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{
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int ret = OB_SUCCESS;
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bool skip_expr = false;
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if (OB_FAIL(check_skip_expr(expr, skip_expr))) {
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LOG_WARN("failed to check skip expr");
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} else if (!skip_expr) {
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ObRawExpr *new_expr = NULL;
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bool need_replace = false;
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if (OB_FAIL(check_need_replace(expr.get_ref_expr(), new_expr, need_replace))) {
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LOG_WARN("failed to check need replace", K(ret));
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} else if (need_replace) {
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expr.set_ref_expr(new_expr);
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replace_happened_ = true;
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}
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}
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return ret;
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}
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int ObRawExprReplacer::visit(ObPseudoColumnRawExpr &expr)
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{
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UNUSED(expr);
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return OB_SUCCESS;
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}
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int ObRawExprReplacer::visit(ObCaseOpRawExpr &expr)
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{
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int ret = OB_SUCCESS;
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bool skip_expr = false;
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if (expr.get_when_expr_size() != expr.get_then_expr_size()) {
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ret = OB_ERR_UNEXPECTED;
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} else if (OB_FAIL(check_skip_expr(expr, skip_expr))) {
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LOG_WARN("failed to check skip expr");
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} else if (!skip_expr) {
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ObRawExpr *new_expr = NULL;
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bool need_replace = false;
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if (OB_FAIL(check_need_replace(expr.get_arg_param_expr(), new_expr, need_replace))) {
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LOG_WARN("failed to check need replace", K(ret));
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} else if (need_replace) {
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expr.set_arg_param_expr(new_expr);
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replace_happened_ = true;
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}
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int64_t count = expr.get_when_expr_size();
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for (int32_t i = 0; OB_SUCC(ret) && i < count; ++i) {
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if (OB_FAIL(check_need_replace(expr.get_when_param_expr(i), new_expr, need_replace))) {
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LOG_WARN("failed to check need replace", K(ret));
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} else if (need_replace) {
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expr.replace_when_param_expr(i, new_expr);
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replace_happened_ = true;
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}
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if (OB_FAIL(ret)) {
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} else if (OB_FAIL(check_need_replace(expr.get_then_param_expr(i), new_expr, need_replace))) {
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LOG_WARN("failed to check need replace", K(ret));
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} else if (need_replace) {
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expr.replace_then_param_expr(i, new_expr);
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replace_happened_ = true;
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}
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}
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if (OB_SUCC(ret)) {
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if (OB_FAIL(check_need_replace(expr.get_default_param_expr(), new_expr, need_replace))) {
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LOG_WARN("failed to check need replace", K(ret));
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} else if (need_replace) {
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expr.set_default_param_expr(new_expr);
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replace_happened_ = true;
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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 ObRawExprReplacer::visit(ObAggFunRawExpr &expr)
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{
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int ret = OB_SUCCESS;
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bool skip_expr = false;
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if (OB_FAIL(check_skip_expr(expr, skip_expr))) {
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LOG_WARN("failed to check skip expr");
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} else if (!skip_expr) {
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ObRawExpr *new_expr = NULL;
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bool need_replace = false;
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ObIArray<ObRawExpr*> &real_param_exprs = expr.get_real_param_exprs_for_update();
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for (int64_t i = 0; OB_SUCC(ret) && i < real_param_exprs.count(); ++i) {
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if (OB_FAIL(check_need_replace(real_param_exprs.at(i), new_expr, need_replace))) {
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LOG_WARN("failed to check need replace", K(ret));
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} else if (need_replace) {
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real_param_exprs.at(i) = new_expr;
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replace_happened_ = true;
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}
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}
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if (OB_SUCC(ret)) {
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ObIArray<OrderItem> &order_items = expr.get_order_items_for_update();
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for (int64_t i = 0; OB_SUCC(ret) && i < order_items.count(); ++i) {
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if (OB_FAIL(check_need_replace(order_items.at(i).expr_, new_expr, need_replace))) {
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LOG_WARN("failed to check need replace", K(ret));
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} else if (need_replace) {
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order_items.at(i).expr_ = new_expr;
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replace_happened_ = true;
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}
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}
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}
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if (OB_SUCC(ret)) {
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if (OB_FAIL(check_need_replace(expr.get_pl_agg_udf_expr(), new_expr, need_replace))) {
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LOG_WARN("failed to check need replace", K(ret));
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} else if (need_replace) {
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expr.set_pl_agg_udf_expr(new_expr);
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replace_happened_ = true;
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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 ObRawExprReplacer::visit(ObSysFunRawExpr &expr)
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{
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int ret = OB_SUCCESS;
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bool skip_expr = false;
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if (OB_FAIL(check_skip_expr(expr, skip_expr))) {
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LOG_WARN("failed to check skip expr");
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} else if (!skip_expr) {
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ObRawExpr *new_expr = NULL;
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bool need_replace = false;
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int64_t count = expr.get_param_count();
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for (int32_t i = 0; OB_SUCC(ret) && i < count; ++i) {
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if (OB_FAIL(check_need_replace(expr.get_param_expr(i), new_expr, need_replace))) {
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LOG_WARN("failed to check need replace", K(ret));
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} else if (need_replace) {
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ret = expr.replace_param_expr(i, new_expr);
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replace_happened_ = true;
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}
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}
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}
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return OB_SUCCESS;
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}
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int ObRawExprReplacer::visit(ObSetOpRawExpr &expr)
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{
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UNUSED(expr);
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return OB_SUCCESS;
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}
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int ObRawExprReplacer::visit(ObWinFunRawExpr &expr)
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{
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int ret = OB_SUCCESS;
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bool skip_expr = false;
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if (OB_FAIL(check_skip_expr(expr, skip_expr))) {
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LOG_WARN("failed to check skip expr");
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} else if (!skip_expr) {
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ObRawExpr *new_expr = NULL;
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bool need_replace = false;
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int64_t count = expr.get_param_count();
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for (int64_t i = 0; OB_SUCC(ret) && i < count; ++i) {
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if (OB_FAIL(check_need_replace(expr.get_param_expr(i), new_expr, need_replace))) {
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LOG_WARN("failed to check need replace", K(ret));
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} else if (need_replace) {
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expr.get_param_expr(i) = new_expr;
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replace_happened_ = true;
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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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bool ObRawExprReplacer::skip_child(ObRawExpr &expr)
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{
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bool bret = false;
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int ret = OB_SUCCESS;
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if (OB_FAIL(check_skip_expr(expr, bret))) {
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LOG_WARN("failed to check skip expr", K(ret));
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}
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return bret;
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}
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int ObRawExprReplacer::add_replace_expr(ObRawExpr *from_expr,
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ObRawExpr *to_expr,
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bool overwrite /*false*/)
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{
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int ret = OB_SUCCESS;
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bool is_existed = false;
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if (OB_ISNULL(from_expr) || OB_ISNULL(to_expr)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("unexpected null expr", KP(from_expr), KP(to_expr), K(ret));
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} else if (OB_FAIL(try_init_expr_map(DEFAULT_BUCKET_SIZE))) {
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LOG_WARN("failed to init expr map", K(ret));
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} else if (OB_FAIL(check_from_expr_existed(from_expr, to_expr, overwrite, is_existed))) {
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LOG_WARN("failed to check from expr existed", K(ret));
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} else if (is_existed) {
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// do not add duplicated replace expr
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} else if (OB_FAIL(expr_replace_map_.set_refactored(reinterpret_cast<uint64_t>(from_expr),
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reinterpret_cast<uint64_t>(to_expr),
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overwrite))) {
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LOG_WARN("failed to add replace expr into map", K(ret));
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} else if (OB_FAIL(to_exprs_.set_refactored(reinterpret_cast<uint64_t>(to_expr)))) {
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LOG_WARN("failed to add replace expr into set", K(ret));
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}
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return ret;
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}
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int ObRawExprReplacer::add_replace_exprs(const ObIArray<ObRawExpr *> &from_exprs,
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const ObIArray<ObRawExpr *> &to_exprs)
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{
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int ret = OB_SUCCESS;
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if (OB_UNLIKELY(from_exprs.count() != to_exprs.count())) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("expr size mismatch", K(from_exprs.count()), K(to_exprs.count()), K(ret));
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} else if (OB_FAIL(try_init_expr_map(from_exprs.count()))) {
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LOG_WARN("failed to init expr map", K(ret));
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}
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for (int64_t i = 0; OB_SUCC(ret) && i < from_exprs.count(); ++i) {
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if (OB_FAIL(add_replace_expr(from_exprs.at(i), to_exprs.at(i)))) {
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LOG_WARN("failed to add replace expr", K(ret));
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}
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}
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return ret;
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}
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int ObRawExprReplacer::add_replace_exprs(
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const ObIArray<std::pair<ObRawExpr *, ObRawExpr *>> &to_replace_exprs)
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{
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int ret = OB_SUCCESS;
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if (OB_FAIL(try_init_expr_map(to_replace_exprs.count()))) {
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LOG_WARN("failed to init expr map", K(ret));
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}
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for (int64_t i = 0; OB_SUCC(ret) && i < to_replace_exprs.count(); ++i) {
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if (OB_FAIL(add_replace_expr(to_replace_exprs.at(i).first, to_replace_exprs.at(i).second))) {
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LOG_WARN("failed to add replace expr", K(ret));
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}
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}
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return ret;
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}
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int ObRawExprReplacer::append_replace_exprs(const ObRawExprReplacer &other)
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{
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int ret = OB_SUCCESS;
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if (OB_FAIL(try_init_expr_map(other.expr_replace_map_.size()))) {
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LOG_WARN("failed to init expr map", K(ret));
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}
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for (auto it = other.expr_replace_map_.begin();
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OB_SUCC(ret) && it != other.expr_replace_map_.end(); ++it) {
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if (OB_FAIL(add_replace_expr(reinterpret_cast<ObRawExpr *>(it->first),
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reinterpret_cast<ObRawExpr *>(it->second)))) {
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LOG_WARN("failed to push back from to expr", K(ret));
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}
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}
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return ret;
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}
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int ObRawExprReplacer::try_init_expr_map(int64_t bucket_size)
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{
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int ret = OB_SUCCESS;
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if (OB_UNLIKELY(!expr_replace_map_.created())) {
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bucket_size = MAX(bucket_size, DEFAULT_BUCKET_SIZE);
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if (OB_FAIL(expr_replace_map_.create(bucket_size, ObModIds::OB_SQL_COMPILE))) {
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LOG_WARN("failed to create expr map", K(ret));
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} else if (OB_FAIL(to_exprs_.create(bucket_size))) {
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LOG_WARN("failed to create expr set", K(ret));
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}
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}
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return ret;
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}
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int ObRawExprReplacer::check_from_expr_existed(const ObRawExpr *from_expr,
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const ObRawExpr *to_expr,
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const bool overwrite,
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bool &is_existed)
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{
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int ret = OB_SUCCESS;
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ObRawExpr *old_expr = NULL;
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if (OB_FAIL(check_need_replace(from_expr, old_expr, is_existed))) {
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LOG_WARN("failed to check need replace", K(ret));
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} else if (!is_existed) {
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// do nothing
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} else if (OB_UNLIKELY(old_expr != to_expr)) {
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if (overwrite) {
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is_existed = false;
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}
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}
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return ret;
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}
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int ObRawExprReplacer::check_skip_expr(const ObRawExpr &expr, bool &skip_expr)
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{
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int ret = OB_SUCCESS;
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int tmp_ret = OB_SUCCESS;
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skip_expr = false;
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uint64_t key = reinterpret_cast<uint64_t>(&expr);
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if (OB_UNLIKELY(!to_exprs_.created())) {
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skip_expr = true;
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} else if (OB_HASH_EXIST == (tmp_ret = to_exprs_.exist_refactored(key))) {
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skip_expr = true;
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} else if (OB_UNLIKELY(OB_HASH_NOT_EXIST != tmp_ret)) {
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ret = tmp_ret;
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LOG_WARN("failed to get expr from set", K(ret));
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}
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return ret;
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}
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int ObRawExprReplacer::check_need_replace(const ObRawExpr *old_expr,
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ObRawExpr *&new_expr,
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bool &need_replace)
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{
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int ret = OB_SUCCESS;
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uint64_t key = reinterpret_cast<uint64_t>(old_expr);
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uint64_t val = 0;
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need_replace = false;
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if (OB_UNLIKELY(!expr_replace_map_.created())) {
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// do nothing
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} else if (OB_FAIL(expr_replace_map_.get_refactored(key, val))) {
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if (OB_HASH_NOT_EXIST == ret) {
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ret = OB_SUCCESS;
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} else {
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LOG_WARN("failed to get expr from hash map", K(ret));
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}
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} else {
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need_replace = true;
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new_expr = reinterpret_cast<ObRawExpr *>(val);
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}
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return ret;
|
|
}
|
|
|
|
}//end of namespace sql
|
|
}//end of namespace oceanbase
|