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