appendCreateTable method
Implementation
Future<int> appendCreateTable(
String tableName, Map<String, dynamic> schemaJson) async {
return append((lsn, prev) => WalBinRecord(
lsn: lsn, txnId: 0, prevLsn: prev,
op: WalBinOp.createTable, flags: 0x02, tableId: 0, rowId: 0,
ddlPayload: {'table': tableName, 'schema': schemaJson},
));
}