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br: recursive split batch create table when restore failure on batch create table #39829

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merged 5 commits into from
Dec 26, 2022
Merged

br: recursive split batch create table when restore failure on batch create table #39829

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6ed5e77
fix: restore failure on batch create table when size of tables schema…
fengou1 Dec 12, 2022
2e0df43
fix: refactor the func with less parameter
fengou1 Dec 12, 2022
c6e2d92
Merge branch 'master' into issue_39029
fengou1 Dec 12, 2022
0e606c5
fix: revert unexpected change
fengou1 Dec 12, 2022
84ebae3
Merge branch 'master' into issue_39029
ti-chi-bot Dec 26, 2022
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28 changes: 25 additions & 3 deletions br/pkg/gluetidb/glue.go
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Original file line number Diff line number Diff line change
Expand Up @@ -203,9 +203,32 @@ func (gs *tidbSession) CreatePlacementPolicy(ctx context.Context, policy *model.
return d.CreatePlacementPolicyWithInfo(gs.se, policy, ddl.OnExistIgnore)
}

// SplitBatchCreateTable provide a way to split batch into small batch when batch size is large than 6 MB.
// The raft entry has limit size of 6 MB, a batch of CreateTables may hit this limitation
// TODO: shall query string be set for each split batch create, it looks does not matter if we set once for all.
func (gs *tidbSession) SplitBatchCreateTable(schema model.CIStr, info []*model.TableInfo, cs ...ddl.CreateTableWithInfoConfigurier) error {
var err error
d := domain.GetDomain(gs.se).DDL()
if err = d.BatchCreateTableWithInfo(gs.se, schema, info, append(cs, ddl.OnExistIgnore)...); kv.ErrEntryTooLarge.Equal(err) {
if len(info) == 1 {
return err
}
mid := len(info) / 2
err = gs.SplitBatchCreateTable(schema, info[:mid])
if err != nil {
return err
}
err = gs.SplitBatchCreateTable(schema, info[mid:])
if err != nil {
return err
}
return nil
}
return err
}

// CreateTables implements glue.BatchCreateTableSession.
func (gs *tidbSession) CreateTables(ctx context.Context, tables map[string][]*model.TableInfo, cs ...ddl.CreateTableWithInfoConfigurier) error {
d := domain.GetDomain(gs.se).DDL()
var dbName model.CIStr

// Disable foreign key check when batch create tables.
Expand Down Expand Up @@ -233,8 +256,7 @@ func (gs *tidbSession) CreateTables(ctx context.Context, tables map[string][]*mo
cloneTables = append(cloneTables, table)
}
gs.se.SetValue(sessionctx.QueryString, queryBuilder.String())
err := d.BatchCreateTableWithInfo(gs.se, dbName, cloneTables, append(cs, ddl.OnExistIgnore)...)
if err != nil {
if err := gs.SplitBatchCreateTable(dbName, cloneTables); err != nil {
//It is possible to failure when TiDB does not support model.ActionCreateTables.
//In this circumstance, BatchCreateTableWithInfo returns errno.ErrInvalidDDLJob,
//we fall back to old way that creating table one by one
Expand Down