infoschema: fix the issue txn state size is not defined (#53801) (#53826

)

close #53026

infoschema/tables.go

@@ -1463,7 +1463,7 @@ var tableTiDBTrxCols = []columnInfo{
 	{name: txninfo.StartTimeStr, tp: mysql.TypeTimestamp, decimal: 6, size: 26, comment: "Start time of the transaction"},
 	{name: txninfo.CurrentSQLDigestStr, tp: mysql.TypeVarchar, size: 64, comment: "Digest of the sql the transaction are currently running"},
 	{name: txninfo.CurrentSQLDigestTextStr, tp: mysql.TypeBlob, size: types.UnspecifiedLength, comment: "The normalized sql the transaction are currently running"},
-	{name: txninfo.StateStr, tp: mysql.TypeEnum, enumElems: txninfo.TxnRunningStateStrs, comment: "Current running state of the transaction"},
+	{name: txninfo.StateStr, tp: mysql.TypeEnum, size: 16, enumElems: txninfo.TxnRunningStateStrs, comment: "Current running state of the transaction"},
 	{name: txninfo.WaitingStartTimeStr, tp: mysql.TypeTimestamp, decimal: 6, size: 26, comment: "Current lock waiting's start time"},
 	{name: txninfo.MemBufferKeysStr, tp: mysql.TypeLonglong, size: 64, comment: "How many entries are in MemDB"},
 	{name: txninfo.MemBufferBytesStr, tp: mysql.TypeLonglong, size: 64, comment: "MemDB used memory"},

infoschema/tables_test.go

@@ -1424,6 +1424,8 @@ func TestTiDBTrx(t *testing.T) {
 		"424768545227014155 2021-05-07 12:56:48.001000 "+digest.String()+" update `test_tidb_trx` set `i` = `i` + ? Idle <nil> 1 19 2 root test [] ",
 		"425070846483628033 2021-05-20 21:16:35.778000 <nil> <nil> LockWaiting 2021-05-20 13:18:30.123456 0 19 10 user1 db1 [\"sql1\",\"sql2\",\""+digest.String()+"\"] "))
 
+	tk.MustQuery(`select state from information_schema.tidb_trx as trx  union select state from information_schema.tidb_trx as trx`).Sort().
+		Check(testkit.Rows(txninfo.TxnRunningStateStrs[txninfo.TxnIdle], txninfo.TxnRunningStateStrs[txninfo.TxnLockAcquiring]))
 	// Test the all_sql_digests column can be directly passed to the tidb_decode_sql_digests function.
 	require.NoError(t, failpoint.Enable("github.com/pingcap/tidb/expression/sqlDigestRetrieverSkipRetrieveGlobal", "return"))
 	defer func() {