[bug] tae: fix hang issue and reserve some table IDs.

pkg/catalog/types.go

@@ -246,6 +246,9 @@ const (
 	MO_DATABASE_ID = 1
 	MO_TABLES_ID   = 2
 	MO_COLUMNS_ID  = 3
+
+	// MO_RESERVED_MAX is the max reserved table ID.
+	MO_RESERVED_MAX = 100
 )
 
 // index use to update constraint

pkg/vm/engine/tae/catalog/database.go

@@ -381,22 +381,25 @@ func (e *DBEntry) DropTableEntryByID(id uint64, txn txnif.AsyncTxn) (newEntry bo
 
 func (e *DBEntry) CreateTableEntry(schema *Schema, txn txnif.AsyncTxn, dataFactory TableDataFactory) (created *TableEntry, err error) {
 	e.Lock()
+	defer e.Unlock()
 	created = NewTableEntry(e, schema, txn, dataFactory)
 	err = e.AddEntryLocked(created, txn, false)
-	e.Unlock()
 
 	return created, err
 }
 
 func (e *DBEntry) CreateTableEntryWithTableId(schema *Schema, txn txnif.AsyncTxn, dataFactory TableDataFactory, tableId uint64) (created *TableEntry, err error) {
 	e.Lock()
+	defer e.Unlock()
+	if tableId < pkgcatalog.MO_RESERVED_MAX {
+		return nil, moerr.NewInternalErrorNoCtx("reserved table ID %d", tableId)
+	}
 	//Deduplicate for tableId
 	if _, exist := e.entries[tableId]; exist {
 		return nil, moerr.GetOkExpectedDup()
 	}
 	created = NewTableEntryWithTableId(e, schema, txn, dataFactory, tableId)
 	err = e.AddEntryLocked(created, txn, false)
-	e.Unlock()
 
 	return created, err
 }