From 787a14d96554938fe1cb4a26954f201e370fdcd7 Mon Sep 17 00:00:00 2001 From: hongyunyan <649330952@qq.com> Date: Wed, 22 Jun 2022 17:14:37 +0800 Subject: [PATCH] This is an automated cherry-pick of #5166 Signed-off-by: ti-chi-bot --- dbms/src/Core/Block.cpp | 14 +- dbms/src/Debug/MockTiDB.cpp | 5 +- dbms/src/Debug/dbgFuncMockRaftCommand.cpp | 42 +++-- dbms/src/Debug/dbgFuncMockRaftSnapshot.cpp | 24 ++- dbms/src/Debug/dbgFuncRegion.cpp | 8 +- dbms/src/Debug/dbgTools.cpp | 15 +- .../DecodingStorageSchemaSnapshot.h | 14 +- .../Transaction/RegionBlockReader.cpp | 2 + dbms/src/Storages/Transaction/TiDB.cpp | 5 + dbms/src/Storages/Transaction/TiDB.h | 21 ++- .../Storages/Transaction/TiKVRecordFormat.h | 9 +- .../Transaction/tests/RowCodecTestUtils.h | 8 +- .../tests/bench_region_block_reader.cpp | 171 ++++++++++++++++++ ...gtest_decoding_storage_schema_snapshot.cpp | 65 +++++++ .../tests/gtest_region_block_reader.cpp | 68 +++---- .../clustered_index/ddl.test | 86 +++++++++ 16 files changed, 480 insertions(+), 77 deletions(-) create mode 100644 dbms/src/Storages/Transaction/tests/bench_region_block_reader.cpp create mode 100644 dbms/src/Storages/Transaction/tests/gtest_decoding_storage_schema_snapshot.cpp diff --git a/dbms/src/Core/Block.cpp b/dbms/src/Core/Block.cpp index 28db7af82e1..971e8f36e2a 100644 --- a/dbms/src/Core/Block.cpp +++ b/dbms/src/Core/Block.cpp @@ -238,10 +238,18 @@ void Block::checkNumberOfRows() const if (rows == -1) rows = size; else if (rows != size) - throw Exception("Sizes of columns doesn't match: " - + data.front().name + ": " + toString(rows) - + ", " + elem.name + ": " + toString(size), + { + auto first_col = data.front(); + throw Exception(fmt::format( + "Sizes of columns doesn't match: {}(id={}): {}, {}(id={}): {}", + first_col.name, + first_col.column_id, + rows, + elem.name, + elem.column_id, + size), ErrorCodes::SIZES_OF_COLUMNS_DOESNT_MATCH); + } } } diff --git a/dbms/src/Debug/MockTiDB.cpp b/dbms/src/Debug/MockTiDB.cpp index 42ab56a97c1..7b3bdb0948f 100644 --- a/dbms/src/Debug/MockTiDB.cpp +++ b/dbms/src/Debug/MockTiDB.cpp @@ -221,7 +221,6 @@ TiDB::TableInfoPtr MockTiDB::parseColumns( { String & name = string_tokens[index]; index_info.idx_cols[index].name = name; - index_info.idx_cols[index].offset = pk_column_pos_map[name]; index_info.idx_cols[index].length = -1; } } @@ -302,7 +301,7 @@ int MockTiDB::newTables( tables_by_id.emplace(table->table_info.id, table); tables_by_name.emplace(qualified_name, table); - AffectedOption opt; + AffectedOption opt{}; opt.schema_id = table->database_id; opt.table_id = table->id(); opt.old_schema_id = table->database_id; @@ -571,7 +570,7 @@ void MockTiDB::renameTables(const std::vectordatabase_id; opt.table_id = new_table->id(); opt.old_schema_id = table->database_id; diff --git a/dbms/src/Debug/dbgFuncMockRaftCommand.cpp b/dbms/src/Debug/dbgFuncMockRaftCommand.cpp index df93ee1c78d..3626041f428 100644 --- a/dbms/src/Debug/dbgFuncMockRaftCommand.cpp +++ b/dbms/src/Debug/dbgFuncMockRaftCommand.cpp @@ -40,7 +40,7 @@ void MockRaftCommand::dbgFuncRegionBatchSplit(Context & context, const ASTs & ar auto & tmt = context.getTMTContext(); auto & kvstore = tmt.getKVStore(); - RegionID region_id = (RegionID)safeGet(typeid_cast(*args[0]).value); + auto region_id = static_cast(safeGet(typeid_cast(*args[0]).value)); const String & database_name = typeid_cast(*args[1]).name; const String & table_name = typeid_cast(*args[2]).name; auto table = MockTiDB::instance().getTableByName(database_name, table_name); @@ -49,7 +49,7 @@ void MockRaftCommand::dbgFuncRegionBatchSplit(Context & context, const ASTs & ar if (4 + handle_column_size * 4 != args.size()) throw Exception("Args not matched, should be: region-id1, database-name, table-name, start1, end1, start2, end2, region-id2", ErrorCodes::BAD_ARGUMENTS); - RegionID region_id2 = (RegionID)safeGet(typeid_cast(*args[args.size() - 1]).value); + auto region_id2 = static_cast(safeGet(typeid_cast(*args[args.size() - 1]).value)); auto table_id = table->id(); TiKVKey start_key1, start_key2, end_key1, end_key2; @@ -59,9 +59,17 @@ void MockRaftCommand::dbgFuncRegionBatchSplit(Context & context, const ASTs & ar std::vector start_keys2; std::vector end_keys1; std::vector end_keys2; + + std::unordered_map column_name_columns_index_map; + for (size_t i = 0; i < table_info.columns.size(); i++) + { + column_name_columns_index_map.emplace(table_info.columns[i].name, i); + } + for (size_t i = 0; i < handle_column_size; i++) { - auto & column_info = table_info.columns[table_info.getPrimaryIndexInfo().idx_cols[i].offset]; + auto idx = column_name_columns_index_map[table_info.getPrimaryIndexInfo().idx_cols[i].name]; + auto & column_info = table_info.columns[idx]; auto start_field1 = RegionBench::convertField(column_info, typeid_cast(*args[3 + i]).value); TiDB::DatumBumpy start_datum1 = TiDB::DatumBumpy(start_field1, column_info.tp); @@ -88,10 +96,10 @@ void MockRaftCommand::dbgFuncRegionBatchSplit(Context & context, const ASTs & ar } else { - HandleID start1 = (HandleID)safeGet(typeid_cast(*args[3]).value); - HandleID end1 = (HandleID)safeGet(typeid_cast(*args[4]).value); - HandleID start2 = (HandleID)safeGet(typeid_cast(*args[5]).value); - HandleID end2 = (HandleID)safeGet(typeid_cast(*args[6]).value); + auto start1 = static_cast(safeGet(typeid_cast(*args[3]).value)); + auto end1 = static_cast(safeGet(typeid_cast(*args[4]).value)); + auto start2 = static_cast(safeGet(typeid_cast(*args[5]).value)); + auto end2 = static_cast(safeGet(typeid_cast(*args[6]).value)); start_key1 = RecordKVFormat::genKey(table_id, start1); start_key2 = RecordKVFormat::genKey(table_id, start2); end_key1 = RecordKVFormat::genKey(table_id, end1); @@ -110,7 +118,7 @@ void MockRaftCommand::dbgFuncRegionBatchSplit(Context & context, const ASTs & ar request.set_cmd_type(raft_cmdpb::AdminCmdType::BatchSplit); raft_cmdpb::BatchSplitResponse * splits = response.mutable_splits(); { - auto region = splits->add_regions(); + auto * region = splits->add_regions(); region->set_id(region_id); region->set_start_key(start_key1); region->set_end_key(end_key1); @@ -118,7 +126,7 @@ void MockRaftCommand::dbgFuncRegionBatchSplit(Context & context, const ASTs & ar *region->mutable_region_epoch() = new_epoch; } { - auto region = splits->add_regions(); + auto * region = splits->add_regions(); region->set_id(region_id2); region->set_start_key(start_key2); region->set_end_key(end_key2); @@ -144,8 +152,8 @@ void MockRaftCommand::dbgFuncPrepareMerge(Context & context, const ASTs & args, throw Exception("Args not matched, should be: source-id1, target-id2", ErrorCodes::BAD_ARGUMENTS); } - RegionID region_id = (RegionID)safeGet(typeid_cast(*args[0]).value); - RegionID target_id = (RegionID)safeGet(typeid_cast(*args[1]).value); + auto region_id = static_cast(safeGet(typeid_cast(*args[0]).value)); + auto target_id = static_cast(safeGet(typeid_cast(*args[1]).value)); auto & tmt = context.getTMTContext(); auto & kvstore = tmt.getKVStore(); @@ -157,7 +165,7 @@ void MockRaftCommand::dbgFuncPrepareMerge(Context & context, const ASTs & args, { request.set_cmd_type(raft_cmdpb::AdminCmdType::PrepareMerge); - auto prepare_merge = request.mutable_prepare_merge(); + auto * prepare_merge = request.mutable_prepare_merge(); { auto min_index = region->appliedIndex(); prepare_merge->set_min_index(min_index); @@ -184,8 +192,8 @@ void MockRaftCommand::dbgFuncCommitMerge(Context & context, const ASTs & args, D throw Exception("Args not matched, should be: source-id1, current-id2", ErrorCodes::BAD_ARGUMENTS); } - RegionID source_id = (RegionID)safeGet(typeid_cast(*args[0]).value); - RegionID current_id = (RegionID)safeGet(typeid_cast(*args[1]).value); + auto source_id = static_cast(safeGet(typeid_cast(*args[0]).value)); + auto current_id = static_cast(safeGet(typeid_cast(*args[1]).value)); auto & tmt = context.getTMTContext(); auto & kvstore = tmt.getKVStore(); @@ -196,7 +204,7 @@ void MockRaftCommand::dbgFuncCommitMerge(Context & context, const ASTs & args, D { request.set_cmd_type(raft_cmdpb::AdminCmdType::CommitMerge); - auto commit_merge = request.mutable_commit_merge(); + auto * commit_merge = request.mutable_commit_merge(); { commit_merge->set_commit(source_region->appliedIndex()); *commit_merge->mutable_source() = source_region->getMetaRegion(); @@ -220,7 +228,7 @@ void MockRaftCommand::dbgFuncRollbackMerge(Context & context, const ASTs & args, throw Exception("Args not matched, should be: region-id", ErrorCodes::BAD_ARGUMENTS); } - RegionID region_id = (RegionID)safeGet(typeid_cast(*args[0]).value); + auto region_id = static_cast(safeGet(typeid_cast(*args[0]).value)); auto & tmt = context.getTMTContext(); auto & kvstore = tmt.getKVStore(); @@ -231,7 +239,7 @@ void MockRaftCommand::dbgFuncRollbackMerge(Context & context, const ASTs & args, { request.set_cmd_type(raft_cmdpb::AdminCmdType::RollbackMerge); - auto rollback_merge = request.mutable_rollback_merge(); + auto * rollback_merge = request.mutable_rollback_merge(); { auto merge_state = region->getMergeState(); rollback_merge->set_commit(merge_state.commit()); diff --git a/dbms/src/Debug/dbgFuncMockRaftSnapshot.cpp b/dbms/src/Debug/dbgFuncMockRaftSnapshot.cpp index 7eecbbdf6f7..b4225307b35 100644 --- a/dbms/src/Debug/dbgFuncMockRaftSnapshot.cpp +++ b/dbms/src/Debug/dbgFuncMockRaftSnapshot.cpp @@ -68,6 +68,12 @@ RegionPtr GenDbgRegionSnapshotWithData(Context & context, const ASTs & args) size_t handle_column_size = is_common_handle ? table_info.getPrimaryIndexInfo().idx_cols.size() : 1; RegionPtr region; + std::unordered_map column_name_columns_index_map; + for (size_t i = 0; i < table_info.columns.size(); i++) + { + column_name_columns_index_map.emplace(table_info.columns[i].name, i); + } + if (!is_common_handle) { HandleID start = static_cast(safeGet(typeid_cast(*args[3]).value)); @@ -81,7 +87,8 @@ RegionPtr GenDbgRegionSnapshotWithData(Context & context, const ASTs & args) std::vector end_keys; for (size_t i = 0; i < handle_column_size; i++) { - auto & column_info = table_info.columns[table_info.getPrimaryIndexInfo().idx_cols[i].offset]; + auto idx = column_name_columns_index_map[table_info.getPrimaryIndexInfo().idx_cols[i].name]; + auto & column_info = table_info.columns[idx]; auto start_field = RegionBench::convertField(column_info, typeid_cast(*args[3 + i]).value); TiDB::DatumBumpy start_datum = TiDB::DatumBumpy(start_field, column_info.tp); start_keys.emplace_back(start_datum.field()); @@ -122,9 +129,9 @@ RegionPtr GenDbgRegionSnapshotWithData(Context & context, const ASTs & args) std::vector keys; // handle key for (size_t i = 0; i < table_info.getPrimaryIndexInfo().idx_cols.size(); i++) { - auto & idx_col = table_info.getPrimaryIndexInfo().idx_cols[i]; - auto & column_info = table_info.columns[idx_col.offset]; - auto start_field = RegionBench::convertField(column_info, fields[idx_col.offset]); + auto idx = column_name_columns_index_map[table_info.getPrimaryIndexInfo().idx_cols[i].name]; + auto & column_info = table_info.columns[idx]; + auto start_field = RegionBench::convertField(column_info, fields[idx]); TiDB::DatumBumpy start_datum = TiDB::DatumBumpy(start_field, column_info.tp); keys.emplace_back(start_datum.field()); } @@ -198,9 +205,16 @@ void MockRaftCommand::dbgFuncRegionSnapshot(Context & context, const ASTs & args // Get start key and end key form multiple column if it is clustered_index. std::vector start_keys; std::vector end_keys; + + std::unordered_map column_name_columns_index_map; + for (size_t i = 0; i < table_info.columns.size(); i++) + { + column_name_columns_index_map.emplace(table_info.columns[i].name, i); + } for (size_t i = 0; i < handle_column_size; i++) { - const auto & column_info = table_info.columns[table_info.getPrimaryIndexInfo().idx_cols[i].offset]; + auto idx = column_name_columns_index_map[table_info.getPrimaryIndexInfo().idx_cols[i].name]; + const auto & column_info = table_info.columns[idx]; auto start_field = RegionBench::convertField(column_info, typeid_cast(*args[1 + i]).value); TiDB::DatumBumpy start_datum = TiDB::DatumBumpy(start_field, column_info.tp); start_keys.emplace_back(start_datum.field()); diff --git a/dbms/src/Debug/dbgFuncRegion.cpp b/dbms/src/Debug/dbgFuncRegion.cpp index 7924c086508..b2171f4af9b 100644 --- a/dbms/src/Debug/dbgFuncRegion.cpp +++ b/dbms/src/Debug/dbgFuncRegion.cpp @@ -61,9 +61,15 @@ void dbgFuncPutRegion(Context & context, const ASTs & args, DBGInvoker::Printer { std::vector start_keys; std::vector end_keys; + std::unordered_map column_name_columns_index_map; + for (size_t i = 0; i < table_info.columns.size(); i++) + { + column_name_columns_index_map.emplace(table_info.columns[i].name, i); + } for (size_t i = 0; i < handle_column_size; i++) { - const auto & column_info = table_info.columns[table_info.getPrimaryIndexInfo().idx_cols[i].offset]; + auto idx = column_name_columns_index_map[table_info.getPrimaryIndexInfo().idx_cols[i].name]; + const auto & column_info = table_info.columns[idx]; auto start_field = RegionBench::convertField(column_info, typeid_cast(*args[1 + i]).value); TiDB::DatumBumpy start_datum = TiDB::DatumBumpy(start_field, column_info.tp); start_keys.emplace_back(start_datum.field()); diff --git a/dbms/src/Debug/dbgTools.cpp b/dbms/src/Debug/dbgTools.cpp index 685b2563a3b..854d8a18bd5 100644 --- a/dbms/src/Debug/dbgTools.cpp +++ b/dbms/src/Debug/dbgTools.cpp @@ -310,7 +310,7 @@ void insert( // // Parse the fields in the inserted row std::vector fields; { - for (ASTs::const_iterator it = values_begin; it != values_end; ++it) + for (auto it = values_begin; it != values_end; ++it) { auto field = typeid_cast((*it).get())->value; fields.emplace_back(field); @@ -330,11 +330,18 @@ void insert( // if (table_info.is_common_handle) { std::vector keys; + + std::unordered_map column_name_columns_index_map; + for (size_t i = 0; i < table_info.columns.size(); i++) + { + column_name_columns_index_map.emplace(table_info.columns[i].name, i); + } + for (size_t i = 0; i < table_info.getPrimaryIndexInfo().idx_cols.size(); i++) { - const auto & idx_col = table_info.getPrimaryIndexInfo().idx_cols[i]; - const auto & column_info = table_info.columns[idx_col.offset]; - auto start_field = RegionBench::convertField(column_info, fields[idx_col.offset]); + const auto & col_idx = column_name_columns_index_map[table_info.getPrimaryIndexInfo().idx_cols[i].name]; + const auto & column_info = table_info.columns[col_idx]; + auto start_field = RegionBench::convertField(column_info, fields[col_idx]); TiDB::DatumBumpy start_datum = TiDB::DatumBumpy(start_field, column_info.tp); keys.emplace_back(start_datum.field()); } diff --git a/dbms/src/Storages/Transaction/DecodingStorageSchemaSnapshot.h b/dbms/src/Storages/Transaction/DecodingStorageSchemaSnapshot.h index c636d9e60ab..5207a86f808 100644 --- a/dbms/src/Storages/Transaction/DecodingStorageSchemaSnapshot.h +++ b/dbms/src/Storages/Transaction/DecodingStorageSchemaSnapshot.h @@ -77,10 +77,12 @@ struct DecodingStorageSchemaSnapshot , decoding_schema_version{decoding_schema_version_} { std::unordered_map column_lut; + std::unordered_map column_name_id_map; for (size_t i = 0; i < table_info_.columns.size(); i++) { const auto & ci = table_info_.columns[i]; column_lut.emplace(ci.id, i); + column_name_id_map.emplace(ci.name, ci.id); } for (size_t i = 0; i < column_defines->size(); i++) { @@ -88,7 +90,7 @@ struct DecodingStorageSchemaSnapshot sorted_column_id_with_pos.insert({cd.id, i}); if (cd.id != TiDBPkColumnID && cd.id != VersionColumnID && cd.id != DelMarkColumnID) { - auto & columns = table_info_.columns; + const auto & columns = table_info_.columns; column_infos.push_back(columns[column_lut.at(cd.id)]); } else @@ -100,10 +102,14 @@ struct DecodingStorageSchemaSnapshot // create pk related metadata if needed if (is_common_handle) { - const auto & primary_index_info = table_info_.getPrimaryIndexInfo(); - for (size_t i = 0; i < primary_index_info.idx_cols.size(); i++) + /// we will not update the IndexInfo except Rename DDL. + /// When the add column / drop column action happenes, the offset of each column may change + /// Thus, we should not use offset to get the column we want, + /// but use to compare the column name to get the column id. + const auto & primary_index_cols = table_info_.getPrimaryIndexInfo().idx_cols; + for (const auto & col : primary_index_cols) { - auto pk_column_id = table_info_.columns[primary_index_info.idx_cols[i].offset].id; + auto pk_column_id = column_name_id_map[col.name]; pk_column_ids.emplace_back(pk_column_id); pk_pos_map.emplace(pk_column_id, reinterpret_cast(std::numeric_limits::max())); } diff --git a/dbms/src/Storages/Transaction/RegionBlockReader.cpp b/dbms/src/Storages/Transaction/RegionBlockReader.cpp index 32be7302775..ad4818659d7 100644 --- a/dbms/src/Storages/Transaction/RegionBlockReader.cpp +++ b/dbms/src/Storages/Transaction/RegionBlockReader.cpp @@ -226,6 +226,8 @@ bool RegionBlockReader::readImpl(Block & block, const RegionDataReadInfoList & d } index++; } + block.checkNumberOfRows(); + return true; } diff --git a/dbms/src/Storages/Transaction/TiDB.cpp b/dbms/src/Storages/Transaction/TiDB.cpp index 3810e25372f..6d3bdd13d50 100644 --- a/dbms/src/Storages/Transaction/TiDB.cpp +++ b/dbms/src/Storages/Transaction/TiDB.cpp @@ -631,8 +631,13 @@ catch (const Poco::Exception & e) /////////////////////// IndexColumnInfo::IndexColumnInfo(Poco::JSON::Object::Ptr json) +<<<<<<< HEAD : offset() , length() +======= + : length(0) + , offset(0) +>>>>>>> 18325f9eb4 (DDL: Use Column Name Instead of Offset to Find the common handle cluster index (#5166)) { deserialize(json); } diff --git a/dbms/src/Storages/Transaction/TiDB.h b/dbms/src/Storages/Transaction/TiDB.h index f67bfb332c7..4c28a614857 100644 --- a/dbms/src/Storages/Transaction/TiDB.h +++ b/dbms/src/Storages/Transaction/TiDB.h @@ -179,7 +179,6 @@ struct ColumnInfo ColumnID id = -1; String name; - Int32 offset = -1; Poco::Dynamic::Var origin_default_value; Poco::Dynamic::Var default_value; Poco::Dynamic::Var default_bit_value; @@ -212,6 +211,12 @@ struct ColumnInfo static Int64 getTimeValue(const String &); static Int64 getYearValue(const String &); static UInt64 getBitValue(const String &); + +private: + /// please be very careful when you have to use offset, + /// because we never update offset when DDL action changes. + /// Thus, our offset will not exactly correspond the order of columns. + Int32 offset = -1; }; enum PartitionType @@ -298,8 +303,13 @@ struct IndexColumnInfo void deserialize(Poco::JSON::Object::Ptr json); String name; - Int32 offset; Int32 length; + +private: + /// please be very careful when you have to use offset, + /// because we never update offset when DDL action changes. + /// Thus, our offset will not exactly correspond the order of columns. + Int32 offset; }; struct IndexInfo { @@ -385,7 +395,12 @@ struct TableInfo bool isLogicalPartitionTable() const { return is_partition_table && belonging_table_id == DB::InvalidTableID && partition.enable; } - /// should not be called if is_common_handle = false + /// should not be called if is_common_handle = false. + /// when use IndexInfo, please avoid to use the offset info + /// the offset value may be wrong in some cases, + /// due to we will not update IndexInfo except RENAME DDL action, + /// but DDL like add column / drop column may change the offset of columns + /// Thus, please be very careful when you must have to use offset information !!!!! const IndexInfo & getPrimaryIndexInfo() const { return index_infos[0]; } IndexInfo & getPrimaryIndexInfo() { return index_infos[0]; } diff --git a/dbms/src/Storages/Transaction/TiKVRecordFormat.h b/dbms/src/Storages/Transaction/TiKVRecordFormat.h index 4a25b6d9292..24542114faf 100644 --- a/dbms/src/Storages/Transaction/TiKVRecordFormat.h +++ b/dbms/src/Storages/Transaction/TiKVRecordFormat.h @@ -135,9 +135,16 @@ inline TiKVKey genKey(const TiDB::TableInfo & table_info, std::vector key memcpy(key.data() + 1, reinterpret_cast(&big_endian_table_id), 8); memcpy(key.data() + 1 + 8, RecordKVFormat::RECORD_PREFIX_SEP, 2); WriteBufferFromOwnString ss; + + std::unordered_map column_name_columns_index_map; + for (size_t i = 0; i < table_info.columns.size(); i++) + { + column_name_columns_index_map.emplace(table_info.columns[i].name, i); + } for (size_t i = 0; i < keys.size(); i++) { - DB::EncodeDatum(keys[i], table_info.columns[table_info.getPrimaryIndexInfo().idx_cols[i].offset].getCodecFlag(), ss); + auto idx = column_name_columns_index_map[table_info.getPrimaryIndexInfo().idx_cols[i].name]; + DB::EncodeDatum(keys[i], table_info.columns[idx].getCodecFlag(), ss); } return encodeAsTiKVKey(key + ss.releaseStr()); } diff --git a/dbms/src/Storages/Transaction/tests/RowCodecTestUtils.h b/dbms/src/Storages/Transaction/tests/RowCodecTestUtils.h index 20b395a9952..34e0d3d4104 100644 --- a/dbms/src/Storages/Transaction/tests/RowCodecTestUtils.h +++ b/dbms/src/Storages/Transaction/tests/RowCodecTestUtils.h @@ -237,14 +237,14 @@ std::pair> getTableInfoAndFields(ColumnIDs handle_ { table_info.is_common_handle = true; TiDB::IndexInfo index_info; - for (size_t i = 0; i < handle_ids.size(); i++) + for (auto handle_id : handle_ids) { TiDB::IndexColumnInfo index_column_info; - for (size_t pos = 0; pos < table_info.columns.size(); pos++) + for (auto & column : table_info.columns) { - if (table_info.columns[pos].id == handle_ids[i]) + if (column.id == handle_id) { - index_column_info.offset = pos; + index_column_info.name = column.name; break; } } diff --git a/dbms/src/Storages/Transaction/tests/bench_region_block_reader.cpp b/dbms/src/Storages/Transaction/tests/bench_region_block_reader.cpp new file mode 100644 index 00000000000..05ab637de7f --- /dev/null +++ b/dbms/src/Storages/Transaction/tests/bench_region_block_reader.cpp @@ -0,0 +1,171 @@ +// Copyright 2022 PingCAP, Ltd. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#include +#include +#include +#include + +#include "RowCodecTestUtils.h" + +using TableInfo = TiDB::TableInfo; +namespace DB::tests +{ +using ColumnIDs = std::vector; +class RegionBlockReaderBenchTest : public benchmark::Fixture +{ +protected: + Int64 handle_value = 100; + UInt8 del_mark_value = 0; + UInt64 version_value = 100; + + RegionDataReadInfoList data_list_read; + std::unordered_map fields_map; + + enum RowEncodeVersion + { + RowV1, + RowV2 + }; + +protected: + void SetUp(const benchmark::State & /*state*/) override + { + data_list_read.clear(); + fields_map.clear(); + } + + void encodeColumns(TableInfo & table_info, std::vector & fields, RowEncodeVersion row_version, size_t num_rows) + { + // for later check + std::unordered_map column_name_columns_index_map; + for (size_t i = 0; i < table_info.columns.size(); i++) + { + fields_map.emplace(table_info.columns[i].id, fields[i]); + column_name_columns_index_map.emplace(table_info.columns[i].name, i); + } + + std::vector value_fields; + std::vector pk_fields; + for (size_t i = 0; i < table_info.columns.size(); i++) + { + if (!table_info.columns[i].hasPriKeyFlag()) + value_fields.emplace_back(fields[i]); + else + pk_fields.emplace_back(fields[i]); + } + + // create PK + WriteBufferFromOwnString pk_buf; + if (table_info.is_common_handle) + { + auto & primary_index_info = table_info.getPrimaryIndexInfo(); + for (size_t i = 0; i < primary_index_info.idx_cols.size(); i++) + { + auto idx = column_name_columns_index_map[primary_index_info.idx_cols[i].name]; + EncodeDatum(pk_fields[i], table_info.columns[idx].getCodecFlag(), pk_buf); + } + } + else + { + DB::EncodeInt64(handle_value, pk_buf); + } + RawTiDBPK pk{std::make_shared(pk_buf.releaseStr())}; + // create value + WriteBufferFromOwnString value_buf; + if (row_version == RowEncodeVersion::RowV1) + { + encodeRowV1(table_info, value_fields, value_buf); + } + else if (row_version == RowEncodeVersion::RowV2) + { + encodeRowV2(table_info, value_fields, value_buf); + } + else + { + throw Exception("Unknown row format " + std::to_string(row_version), ErrorCodes::LOGICAL_ERROR); + } + auto row_value = std::make_shared(std::move(value_buf.str())); + for (size_t i = 0; i < num_rows; i++) + data_list_read.emplace_back(pk, del_mark_value, version_value, row_value); + } + + bool decodeColumns(DecodingStorageSchemaSnapshotConstPtr decoding_schema, bool force_decode) const + { + RegionBlockReader reader{decoding_schema}; + Block block = createBlockSortByColumnID(decoding_schema); + return reader.read(block, data_list_read, force_decode); + } + + std::pair> getNormalTableInfoFields(const ColumnIDs & handle_ids, bool is_common_handle) const + { + return getTableInfoAndFields( + handle_ids, + is_common_handle, + ColumnIDValue(2, handle_value), + ColumnIDValue(3, std::numeric_limits::max()), + ColumnIDValue(4, std::numeric_limits::min()), + ColumnIDValue(9, String("aaa")), + ColumnIDValue(10, DecimalField(ToDecimal(12345678910ULL, 4), 4)), + ColumnIDValueNull(11)); + } +}; + +BENCHMARK_DEFINE_F(RegionBlockReaderBenchTest, CommonHandle) +(benchmark::State & state) +{ + size_t num_rows = state.range(0); + auto [table_info, fields] = getNormalTableInfoFields({2, 3, 4}, true); + encodeColumns(table_info, fields, RowEncodeVersion::RowV2, num_rows); + auto decoding_schema = getDecodingStorageSchemaSnapshot(table_info); + for (auto _ : state) + { + decodeColumns(decoding_schema, true); + } +} + + +BENCHMARK_DEFINE_F(RegionBlockReaderBenchTest, PKIsNotHandle) +(benchmark::State & state) +{ + size_t num_rows = state.range(0); + auto [table_info, fields] = getNormalTableInfoFields({EXTRA_HANDLE_COLUMN_ID}, false); + encodeColumns(table_info, fields, RowEncodeVersion::RowV2, num_rows); + auto decoding_schema = getDecodingStorageSchemaSnapshot(table_info); + for (auto _ : state) + { + decodeColumns(decoding_schema, true); + } +} + +BENCHMARK_DEFINE_F(RegionBlockReaderBenchTest, PKIsHandle) +(benchmark::State & state) +{ + size_t num_rows = state.range(0); + auto [table_info, fields] = getNormalTableInfoFields({2}, false); + encodeColumns(table_info, fields, RowEncodeVersion::RowV2, num_rows); + auto decoding_schema = getDecodingStorageSchemaSnapshot(table_info); + for (auto _ : state) + { + decodeColumns(decoding_schema, true); + } +} + +constexpr size_t num_iterations_test = 1000; + +BENCHMARK_REGISTER_F(RegionBlockReaderBenchTest, PKIsHandle)->Iterations(num_iterations_test)->Arg(1)->Arg(10)->Arg(100); +BENCHMARK_REGISTER_F(RegionBlockReaderBenchTest, CommonHandle)->Iterations(num_iterations_test)->Arg(1)->Arg(10)->Arg(100); +BENCHMARK_REGISTER_F(RegionBlockReaderBenchTest, PKIsNotHandle)->Iterations(num_iterations_test)->Arg(1)->Arg(10)->Arg(100); + +} // namespace DB::tests diff --git a/dbms/src/Storages/Transaction/tests/gtest_decoding_storage_schema_snapshot.cpp b/dbms/src/Storages/Transaction/tests/gtest_decoding_storage_schema_snapshot.cpp new file mode 100644 index 00000000000..1de9809ecad --- /dev/null +++ b/dbms/src/Storages/Transaction/tests/gtest_decoding_storage_schema_snapshot.cpp @@ -0,0 +1,65 @@ +// Copyright 2022 PingCAP, Ltd. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#include +#include +#include + +#include "RowCodecTestUtils.h" + +namespace DB::tests +{ +static TableInfo getTableInfoByJson(const String & json_table_info) +{ + return TableInfo(json_table_info); +} +TEST(DecodingStorageSchemaSnapshotTest, CheckPKInfosUnderClusteredIndex) +{ + // table with column [A,B,C,D], primary keys [A,C] + const String json_table_info = R"json({"id":75,"name":{"O":"test","L":"test"},"charset":"utf8mb4","collate":"utf8mb4_bin","cols":[{"id":1,"name":{"O":"A","L":"a"},"offset":0,"origin_default":null,"origin_default_bit":null,"default":null,"default_bit":null,"default_is_expr":false,"generated_expr_string":"","generated_stored":false,"dependences":null,"type":{"Tp":3,"Flag":4099,"Flen":11,"Decimal":0,"Charset":"binary","Collate":"binary","Elems":null},"state":5,"comment":"","hidden":false,"change_state_info":null,"version":2},{"id":2,"name":{"O":"B","L":"b"},"offset":1,"origin_default":null,"origin_default_bit":null,"default":null,"default_bit":null,"default_is_expr":false,"generated_expr_string":"","generated_stored":false,"dependences":null,"type":{"Tp":15,"Flag":0,"Flen":20,"Decimal":0,"Charset":"utf8mb4","Collate":"utf8mb4_bin","Elems":null},"state":5,"comment":"","hidden":false,"change_state_info":null,"version":2},{"id":3,"name":{"O":"C","L":"c"},"offset":2,"origin_default":null,"origin_default_bit":null,"default":null,"default_bit":null,"default_is_expr":false,"generated_expr_string":"","generated_stored":false,"dependences":null,"type":{"Tp":3,"Flag":4099,"Flen":11,"Decimal":0,"Charset":"binary","Collate":"binary","Elems":null},"state":5,"comment":"","hidden":false,"change_state_info":null,"version":2},{"id":4,"name":{"O":"D","L":"d"},"offset":3,"origin_default":null,"origin_default_bit":null,"default":null,"default_bit":null,"default_is_expr":false,"generated_expr_string":"","generated_stored":false,"dependences":null,"type":{"Tp":3,"Flag":0,"Flen":11,"Decimal":0,"Charset":"binary","Collate":"binary","Elems":null},"state":5,"comment":"","hidden":false,"change_state_info":null,"version":2}],"index_info":[{"id":1,"idx_name":{"O":"PRIMARY","L":"primary"},"tbl_name":{"O":"","L":""},"idx_cols":[{"name":{"O":"A","L":"a"},"offset":0,"length":-1},{"name":{"O":"C","L":"c"},"offset":2,"length":-1}],"state":5,"comment":"","index_type":1,"is_unique":true,"is_primary":true,"is_invisible":false,"is_global":false}],"constraint_info":null,"fk_info":null,"state":5,"pk_is_handle":false,"is_common_handle":true,"common_handle_version":1,"comment":"","auto_inc_id":0,"auto_id_cache":0,"auto_rand_id":0,"max_col_id":4,"max_idx_id":1,"max_cst_id":0,"update_timestamp":434039123413303302,"ShardRowIDBits":0,"max_shard_row_id_bits":0,"auto_random_bits":0,"pre_split_regions":0,"partition":null,"compression":"","view":null,"sequence":null,"Lock":null,"version":4,"tiflash_replica":{"Count":1,"LocationLabels":[],"Available":false,"AvailablePartitionIDs":null},"is_columnar":false,"temp_table_type":0,"cache_table_status":0,"policy_ref_info":null,"stats_options":null})json"; + auto table_info = getTableInfoByJson(json_table_info); + auto decoding_schema = getDecodingStorageSchemaSnapshot(table_info); + + //check decoding_schema->pk_column_ids infos + ASSERT_EQ(decoding_schema->pk_column_ids.size(), 2); + ASSERT_EQ(decoding_schema->pk_column_ids[0], 1); + ASSERT_EQ(decoding_schema->pk_column_ids[1], 3); + + //check decoding_schema->pk_pos_map infos + ASSERT_EQ(decoding_schema->pk_column_ids.size(), decoding_schema->pk_pos_map.size()); + // there are three hidden column in the decoded block, so the position of A,C is 3,5 + ASSERT_EQ(decoding_schema->pk_pos_map.at(decoding_schema->pk_column_ids[0]), 3); + ASSERT_EQ(decoding_schema->pk_pos_map.at(decoding_schema->pk_column_ids[1]), 5); +} + +TEST(DecodingStorageSchemaSnapshotTest, CheckPKInfosUnderClusteredIndexAfterDropColumn) +{ + // drop column B for [A,B,C,D]; table with column [A,C,D], primary keys [A,C] + const String json_table_info = R"json({"id":75,"name":{"O":"test","L":"test"},"charset":"utf8mb4","collate":"utf8mb4_bin","cols":[{"id":1,"name":{"O":"A","L":"a"},"offset":0,"origin_default":null,"origin_default_bit":null,"default":null,"default_bit":null,"default_is_expr":false,"generated_expr_string":"","generated_stored":false,"dependences":null,"type":{"Tp":3,"Flag":4099,"Flen":11,"Decimal":0,"Charset":"binary","Collate":"binary","Elems":null},"state":5,"comment":"","hidden":false,"change_state_info":null,"version":2},{"id":3,"name":{"O":"C","L":"c"},"offset":2,"origin_default":null,"origin_default_bit":null,"default":null,"default_bit":null,"default_is_expr":false,"generated_expr_string":"","generated_stored":false,"dependences":null,"type":{"Tp":3,"Flag":4099,"Flen":11,"Decimal":0,"Charset":"binary","Collate":"binary","Elems":null},"state":5,"comment":"","hidden":false,"change_state_info":null,"version":2},{"id":4,"name":{"O":"D","L":"d"},"offset":3,"origin_default":null,"origin_default_bit":null,"default":null,"default_bit":null,"default_is_expr":false,"generated_expr_string":"","generated_stored":false,"dependences":null,"type":{"Tp":3,"Flag":0,"Flen":11,"Decimal":0,"Charset":"binary","Collate":"binary","Elems":null},"state":5,"comment":"","hidden":false,"change_state_info":null,"version":2}],"index_info":[{"id":1,"idx_name":{"O":"PRIMARY","L":"primary"},"tbl_name":{"O":"","L":""},"idx_cols":[{"name":{"O":"A","L":"a"},"offset":0,"length":-1},{"name":{"O":"C","L":"c"},"offset":2,"length":-1}],"state":5,"comment":"","index_type":1,"is_unique":true,"is_primary":true,"is_invisible":false,"is_global":false}],"constraint_info":null,"fk_info":null,"state":5,"pk_is_handle":false,"is_common_handle":true,"common_handle_version":1,"comment":"","auto_inc_id":0,"auto_id_cache":0,"auto_rand_id":0,"max_col_id":4,"max_idx_id":1,"max_cst_id":0,"update_timestamp":434039123413303302,"ShardRowIDBits":0,"max_shard_row_id_bits":0,"auto_random_bits":0,"pre_split_regions":0,"partition":null,"compression":"","view":null,"sequence":null,"Lock":null,"version":4,"tiflash_replica":{"Count":1,"LocationLabels":[],"Available":false,"AvailablePartitionIDs":null},"is_columnar":false,"temp_table_type":0,"cache_table_status":0,"policy_ref_info":null,"stats_options":null})json"; + auto table_info = getTableInfoByJson(json_table_info); + auto decoding_schema = getDecodingStorageSchemaSnapshot(table_info); + + //check decoding_schema->pk_column_ids infos + ASSERT_EQ(decoding_schema->pk_column_ids.size(), 2); + ASSERT_EQ(decoding_schema->pk_column_ids[0], 1); + ASSERT_EQ(decoding_schema->pk_column_ids[1], 3); + + //check decoding_schema->pk_pos_map infos + ASSERT_EQ(decoding_schema->pk_column_ids.size(), decoding_schema->pk_pos_map.size()); + // there are three hidden column in the decoded block, so the position of A,C is 3,4 + ASSERT_EQ(decoding_schema->pk_pos_map.at(decoding_schema->pk_column_ids[0]), 3); + ASSERT_EQ(decoding_schema->pk_pos_map.at(decoding_schema->pk_column_ids[1]), 4); +} + +} // namespace DB::tests diff --git a/dbms/src/Storages/Transaction/tests/gtest_region_block_reader.cpp b/dbms/src/Storages/Transaction/tests/gtest_region_block_reader.cpp index 6a883230854..d08b4dd3738 100644 --- a/dbms/src/Storages/Transaction/tests/gtest_region_block_reader.cpp +++ b/dbms/src/Storages/Transaction/tests/gtest_region_block_reader.cpp @@ -26,13 +26,13 @@ using ColumnIDs = std::vector; class RegionBlockReaderTestFixture : public ::testing::Test { protected: - Int64 handle_value_ = 100; - UInt8 del_mark_value_ = 0; - UInt64 version_value_ = 100; - size_t rows_ = 3; + Int64 handle_value = 100; + UInt8 del_mark_value = 0; + UInt64 version_value = 100; + size_t rows = 3; - RegionDataReadInfoList data_list_read_; - std::unordered_map fields_map_; + RegionDataReadInfoList data_list_read; + std::unordered_map fields_map; enum RowEncodeVersion { @@ -43,8 +43,8 @@ class RegionBlockReaderTestFixture : public ::testing::Test protected: void SetUp() override { - data_list_read_.clear(); - fields_map_.clear(); + data_list_read.clear(); + fields_map.clear(); } void TearDown() override {} @@ -52,8 +52,12 @@ class RegionBlockReaderTestFixture : public ::testing::Test void encodeColumns(TableInfo & table_info, std::vector & fields, RowEncodeVersion row_version) { // for later check + std::unordered_map column_name_columns_index_map; for (size_t i = 0; i < table_info.columns.size(); i++) - fields_map_.emplace(table_info.columns[i].id, fields[i]); + { + fields_map.emplace(table_info.columns[i].id, fields[i]); + column_name_columns_index_map.emplace(table_info.columns[i].name, i); + } std::vector value_fields; std::vector pk_fields; @@ -72,13 +76,13 @@ class RegionBlockReaderTestFixture : public ::testing::Test auto & primary_index_info = table_info.getPrimaryIndexInfo(); for (size_t i = 0; i < primary_index_info.idx_cols.size(); i++) { - size_t pk_offset = primary_index_info.idx_cols[i].offset; - EncodeDatum(pk_fields[i], table_info.columns[pk_offset].getCodecFlag(), pk_buf); + auto idx = column_name_columns_index_map[primary_index_info.idx_cols[i].name]; + EncodeDatum(pk_fields[i], table_info.columns[idx].getCodecFlag(), pk_buf); } } else { - DB::EncodeInt64(handle_value_, pk_buf); + DB::EncodeInt64(handle_value, pk_buf); } RawTiDBPK pk{std::make_shared(pk_buf.releaseStr())}; // create value @@ -96,44 +100,44 @@ class RegionBlockReaderTestFixture : public ::testing::Test throw Exception("Unknown row format " + std::to_string(row_version), ErrorCodes::LOGICAL_ERROR); } auto row_value = std::make_shared(std::move(value_buf.str())); - for (size_t i = 0; i < rows_; i++) - data_list_read_.emplace_back(pk, del_mark_value_, version_value_, row_value); + for (size_t i = 0; i < rows; i++) + data_list_read.emplace_back(pk, del_mark_value, version_value, row_value); } void checkBlock(DecodingStorageSchemaSnapshotConstPtr decoding_schema, const Block & block) const { ASSERT_EQ(block.columns(), decoding_schema->column_defines->size()); - for (size_t row = 0; row < rows_; row++) + for (size_t row = 0; row < rows; row++) { for (size_t pos = 0; pos < block.columns(); pos++) { - auto & column_element = block.getByPosition(pos); + const auto & column_element = block.getByPosition(pos); if (row == 0) { - ASSERT_EQ(column_element.column->size(), rows_); + ASSERT_EQ(column_element.column->size(), rows); } if (column_element.name == EXTRA_HANDLE_COLUMN_NAME) { if (decoding_schema->is_common_handle) { - ASSERT_EQ((*column_element.column)[row], Field(*std::get<0>(data_list_read_[row]))); + ASSERT_EQ((*column_element.column)[row], Field(*std::get<0>(data_list_read[row]))); } else { - ASSERT_EQ((*column_element.column)[row], Field(handle_value_)); + ASSERT_EQ((*column_element.column)[row], Field(handle_value)); } } else if (column_element.name == VERSION_COLUMN_NAME) { - ASSERT_EQ((*column_element.column)[row], Field(version_value_)); + ASSERT_EQ((*column_element.column)[row], Field(version_value)); } else if (column_element.name == TAG_COLUMN_NAME) { - ASSERT_EQ((*column_element.column)[row], Field(NearestFieldType::Type(del_mark_value_))); + ASSERT_EQ((*column_element.column)[row], Field(NearestFieldType::Type(del_mark_value))); } else { - ASSERT_EQ((*column_element.column)[row], fields_map_.at(column_element.column_id)); + ASSERT_EQ((*column_element.column)[row], fields_map.at(column_element.column_id)); } } } @@ -143,7 +147,7 @@ class RegionBlockReaderTestFixture : public ::testing::Test { RegionBlockReader reader{decoding_schema}; Block block = createBlockSortByColumnID(decoding_schema); - if (!reader.read(block, data_list_read_, force_decode)) + if (!reader.read(block, data_list_read, force_decode)) return false; checkBlock(decoding_schema, block); @@ -155,7 +159,7 @@ class RegionBlockReaderTestFixture : public ::testing::Test return getTableInfoAndFields( handle_ids, is_common_handle, - ColumnIDValue(2, handle_value_), + ColumnIDValue(2, handle_value), ColumnIDValue(3, std::numeric_limits::max()), ColumnIDValue(4, std::numeric_limits::min()), ColumnIDValue(9, String("aaa")), @@ -170,7 +174,7 @@ class RegionBlockReaderTestFixture : public ::testing::Test handle_ids, is_common_handle, ColumnIDValue(1, String("")), - ColumnIDValue(2, handle_value_), + ColumnIDValue(2, handle_value), ColumnIDValue(3, std::numeric_limits::max()), ColumnIDValue(4, std::numeric_limits::min()), ColumnIDValue(8, String("")), @@ -182,12 +186,12 @@ class RegionBlockReaderTestFixture : public ::testing::Test // add default value for missing column std::vector missing_column_ids{1, 8, 13}; String missing_column_default_value = String("default"); - for (size_t i = 0; i < table_info.columns.size(); i++) + for (auto & column : table_info.columns) { - if (std::find(missing_column_ids.begin(), missing_column_ids.end(), table_info.columns[i].id) != missing_column_ids.end()) + if (std::find(missing_column_ids.begin(), missing_column_ids.end(), column.id) != missing_column_ids.end()) { - table_info.columns[i].origin_default_value = missing_column_default_value; - fields_map_.emplace(table_info.columns[i].id, Field(missing_column_default_value)); + column.origin_default_value = missing_column_default_value; + fields_map.emplace(column.id, Field(missing_column_default_value)); } } return table_info; @@ -199,7 +203,7 @@ class RegionBlockReaderTestFixture : public ::testing::Test std::tie(table_info, std::ignore) = getTableInfoAndFields( handle_ids, is_common_handle, - ColumnIDValue(2, handle_value_), + ColumnIDValue(2, handle_value), ColumnIDValue(4, std::numeric_limits::min()), ColumnIDValue(9, String("aaa")), ColumnIDValue(10, DecimalField(ToDecimal(12345678910ULL, 4), 4))); @@ -212,7 +216,7 @@ class RegionBlockReaderTestFixture : public ::testing::Test std::tie(table_info, std::ignore) = getTableInfoAndFields( handle_ids, is_common_handle, - ColumnIDValue(2, handle_value_), + ColumnIDValue(2, handle_value), ColumnIDValue(3, std::numeric_limits::max()), ColumnIDValue(4, std::numeric_limits::min()), ColumnIDValue(9, String("aaa")), @@ -227,7 +231,7 @@ class RegionBlockReaderTestFixture : public ::testing::Test std::tie(table_info, std::ignore) = getTableInfoAndFields( handle_ids, is_common_handle, - ColumnIDValue(2, handle_value_), + ColumnIDValue(2, handle_value), ColumnIDValue(3, std::numeric_limits::max()), ColumnIDValue(4, std::numeric_limits::min()), ColumnIDValue(9, String("aaa")), diff --git a/tests/fullstack-test-dt/clustered_index/ddl.test b/tests/fullstack-test-dt/clustered_index/ddl.test index 8abe450c11a..6c4925c9619 100644 --- a/tests/fullstack-test-dt/clustered_index/ddl.test +++ b/tests/fullstack-test-dt/clustered_index/ddl.test @@ -66,3 +66,89 @@ mysql> set session tidb_isolation_read_engines='tiflash'; select * from test.t_2 mysql> drop table test.t_1; mysql> drop table test.t_2; + +### about issue 5154 to check whether add column/drop column will effect the cluster index decode +### drop the column between two columns that are cluster index columns + +mysql> drop table if exists test.t_3; +mysql> create table test.t_3 (A int, B varchar(20), C int, D int, PRIMARY KEY(A,C) CLUSTERED); +mysql> insert into test.t_3 values (1,'1',1,1),(2,'2',2,2); + +mysql> alter table test.t_3 set tiflash replica 1; + +func> wait_table test t_3 + +mysql> set session tidb_isolation_read_engines='tiflash';select * from test.t_3; ++---+---+---+---+ +| A | B | C | D | ++---+---+---+---+ +| 1 | 1 | 1 | 1 | +| 2 | 2 | 2 | 2 | ++---+---+---+---+ + +mysql> alter table test.t_3 drop column B; + +mysql> set session tidb_isolation_read_engines='tiflash';select * from test.t_3; ++---+---+---+ +| A | C | D | ++---+---+---+ +| 1 | 1 | 1 | +| 2 | 2 | 2 | ++---+---+---+ + +# insert some rows +mysql> insert into test.t_3 values (3,3,3),(4,4,4); + +mysql> set session tidb_isolation_read_engines='tiflash';select * from test.t_3; ++---+---+---+ +| A | C | D | ++---+---+---+ +| 1 | 1 | 1 | +| 2 | 2 | 2 | +| 3 | 3 | 3 | +| 4 | 4 | 4 | ++---+---+---+ + +mysql> drop table test.t_3; + +### add the column between two columns that are cluster index columns +mysql> drop table if exists test.t_4 +mysql> create table test.t_4 (A int, B varchar(20), C int, D int, PRIMARY KEY(A,C) CLUSTERED); + +mysql> insert into test.t_4 values (1,'1',1,1),(2,'2',2,2); + +mysql> alter table test.t_4 set tiflash replica 1; + +func> wait_table test t_4 + +mysql> set session tidb_isolation_read_engines='tiflash';select * from test.t_4; ++---+---+---+---+ +| A | B | C | D | ++---+---+---+---+ +| 1 | 1 | 1 | 1 | +| 2 | 2 | 2 | 2 | ++---+---+---+---+ + +mysql> alter table test.t_4 Add column E int after B; + +mysql> set session tidb_isolation_read_engines='tiflash';select * from test.t_4; ++---+---+------+---+---+ +| A | B | E | C | D | ++---+---+------+---+---+ +| 1 | 1 | NULL | 1 | 1 | +| 2 | 2 | NULL | 2 | 2 | ++---+---+------+---+---+ + +mysql> insert into test.t_4 values (3,'3',3,3,3),(4,'4',4,4,4); + +mysql> set session tidb_isolation_read_engines='tiflash';select * from test.t_4; ++---+---+------+------+------+ +| A | B | E | C | D | ++---+---+------+------+------+ +| 1 | 1 | NULL | 1 | 1 | +| 2 | 2 | NULL | 2 | 2 | +| 3 | 3 | 3 | 3 | 3 | +| 4 | 4 | 4 | 4 | 4 | ++---+---+------+------+------+ + +mysql> drop table test.t_4; \ No newline at end of file