tidb constant 源码
tidb constant 代码
文件路径：/ddl/constant.go
// Copyright 2022 PingCAP, Inc.
//
// 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.
package ddl
import (
"github.com/pingcap/tidb/meta"
)
const (
// JobTable stores the information of DDL jobs.
JobTable = "tidb_ddl_job"
// ReorgTable stores the information of DDL reorganization.
ReorgTable = "tidb_ddl_reorg"
// HistoryTable stores the history DDL jobs.
HistoryTable = "tidb_ddl_history"
// JobTableID is the table ID of `tidb_ddl_job`.
JobTableID = meta.MaxInt48 - 1
// ReorgTableID is the table ID of `tidb_ddl_reorg`.
ReorgTableID = meta.MaxInt48 - 2
// HistoryTableID is the table ID of `tidb_ddl_history`.
HistoryTableID = meta.MaxInt48 - 3
// MDLTableID is the table ID of `tidb_mdl_info`.
MDLTableID = meta.MaxInt48 - 4
// JobTableSQL is the CREATE TABLE SQL of `tidb_ddl_job`.
JobTableSQL = "create table " + JobTable + "(job_id bigint not null, reorg int, schema_ids text(65535), table_ids text(65535), job_meta longblob, type int, processing int, primary key(job_id))"
// ReorgTableSQL is the CREATE TABLE SQL of `tidb_ddl_reorg`.
ReorgTableSQL = "create table " + ReorgTable + "(job_id bigint not null, ele_id bigint, ele_type blob, start_key blob, end_key blob, physical_id bigint, reorg_meta longblob, unique key(job_id, ele_id, ele_type(20)))"
// HistoryTableSQL is the CREATE TABLE SQL of `tidb_ddl_history`.
HistoryTableSQL = "create table " + HistoryTable + "(job_id bigint not null, job_meta longblob, db_name char(64), table_name char(64), schema_ids text(65535), table_ids text(65535), create_time datetime, primary key(job_id))"
)
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