Missing table name in admin show ddl result during drop table

[wjhuang2016]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

During drop table, execute admin show ddl jobs

2. What did you expect to see? (Required)

The result shows the table name.

3. What did you see instead (Required)

The table name is empty

4. What is your TiDB version? (Required)

master

[tiancaiamao]

tidb/executor/executor.go

Lines 531 to 560 in ad59092

	func (e *DDLJobRetriever) appendJobToChunk(req *chunk.Chunk, job *model.Job, checker privilege.Manager) {
	schemaName := job.SchemaName
	tableName := ""
	finishTS := uint64(0)
	if job.BinlogInfo != nil {
	finishTS = job.BinlogInfo.FinishedTS
	if job.BinlogInfo.TableInfo != nil {
	tableName = job.BinlogInfo.TableInfo.Name.L
	}
	if job.BinlogInfo.MultipleTableInfos != nil {
	tablenames := new(strings.Builder)
	for i, affect := range job.BinlogInfo.MultipleTableInfos {
	if i > 0 {
	fmt.Fprintf(tablenames, ",")
	}
	fmt.Fprintf(tablenames, "%s", affect.Name.L)
	}
	tableName = tablenames.String()
	}
	if len(schemaName) == 0 && job.BinlogInfo.DBInfo != nil {
	schemaName = job.BinlogInfo.DBInfo.Name.L
	}
	}
	// For compatibility, the old version of DDL Job wasn't store the schema name and table name.
	if len(schemaName) == 0 {
	schemaName = getSchemaName(e.is, job.SchemaID)
	}
	if len(tableName) == 0 {
	tableName = getTableName(e.is, job.TableID)
	}

The reason is that ... during drop table, the table is removed from the infoschema
So getTableName found nothing.