131 lines
4.4 KiB
C++
131 lines
4.4 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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#include "observer/virtual_table/ob_all_virtual_engine_table.h"
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namespace oceanbase
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{
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using namespace common;
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namespace observer
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{
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ObAllVirtualEngineTable::ObAllVirtualEngineTable() :
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ObVirtualTableScannerIterator()
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{
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}
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ObAllVirtualEngineTable::~ObAllVirtualEngineTable()
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{
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}
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int ObAllVirtualEngineTable::inner_get_next_row(common::ObNewRow *&row)
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{
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int ret = OB_SUCCESS;
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if (OB_ISNULL(allocator_)) {
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ret = OB_NOT_INIT;
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SERVER_LOG(WARN, "allocator is NULL", K(ret));
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} else {
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if (!start_to_read_) {
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ObObj *cells = NULL;
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const int64_t col_count = output_column_ids_.count();
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if (OB_ISNULL(cells = cur_row_.cells_)) {
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ret = OB_ERR_UNEXPECTED;
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SERVER_LOG(WARN, "cur row cell is NULL", K(ret));
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} else if (OB_UNLIKELY(col_count < 0 || col_count > ENGINE_COLUMN_COUNT)) {
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ret = OB_ERR_UNEXPECTED;
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SERVER_LOG(WARN, "column count error ", K(ret), K(col_count));
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} else if (OB_UNLIKELY(col_count > reserved_column_cnt_)) {
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ret = OB_ERR_UNEXPECTED;
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SERVER_LOG(WARN, "cells count error", K(ret), K(col_count),
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K(reserved_column_cnt_));
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} else {
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uint64_t cell_idx = 0;
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for (int64_t k = 0; OB_SUCC(ret) && k < col_count; ++k) {
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uint64_t col_id = output_column_ids_.at(k);
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switch (col_id) {
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case ENGINE: {
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cells[cell_idx].set_varchar("OceanBase");
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cells[cell_idx].set_collation_type(ObCharset::get_default_collation(
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ObCharset::get_default_charset()));
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break;
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}
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case SUPPORT: {
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cells[cell_idx].set_varchar("YES");
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cells[cell_idx].set_collation_type(ObCharset::get_default_collation(
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ObCharset::get_default_charset()));
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break;
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}
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case COMMENT: {
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cells[cell_idx].set_varchar("Supports transactions");
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cells[cell_idx].set_collation_type(ObCharset::get_default_collation(
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ObCharset::get_default_charset()));
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break;
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}
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case TRANSACTIONS: {
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cells[cell_idx].set_varchar("YES");
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cells[cell_idx].set_collation_type(ObCharset::get_default_collation(
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ObCharset::get_default_charset()));
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break;
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}
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case XA: {
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cells[cell_idx].set_varchar("NO");
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cells[cell_idx].set_collation_type(ObCharset::get_default_collation(
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ObCharset::get_default_charset()));
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break;
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}
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case SAVEPOINTS: {
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cells[cell_idx].set_varchar("NO");
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cells[cell_idx].set_collation_type(ObCharset::get_default_collation(
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ObCharset::get_default_charset()));
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break;
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}
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default: {
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ret = OB_ERR_UNEXPECTED;
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SERVER_LOG(WARN, "invalid column id", K(ret), K(cell_idx),
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K(output_column_ids_), K(col_id));
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break;
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}
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}
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if (OB_SUCC(ret)) {
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++cell_idx;
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}
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}
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if (OB_SUCC(ret)) {
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if (OB_FAIL(scanner_.add_row(cur_row_))) {
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SERVER_LOG(WARN, "fail to add row", K(ret), K(cur_row_));
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}
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}
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if (OB_SUCC(ret)) {
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scanner_it_ = scanner_.begin();
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start_to_read_ = true;
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}
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}
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}
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if (OB_SUCCESS == ret && start_to_read_) {
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if (OB_FAIL(scanner_it_.get_next_row(cur_row_))) {
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if (OB_ITER_END != ret) {
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SERVER_LOG(WARN, "fail to get next row", K(ret));
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}
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} else {
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row = &cur_row_;
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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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} // namespace observer
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} // namespace oceanbase
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