I would like to safely drop Firebird table. I have 3 transactions, one to recreate table, one to do something with the table (just inserting a single row to keep it simple) and the last one to drop the table. If all these txns are executed using single connection these works. If I use a different connection, then the drop command fails with
lock conflict on no wait transaction unsuccessful metadata update object TABLE "DEMO" is in use
private static void Test() {
using var conn1 = new FbConnection(ConnectionString);
using var conn2 = new FbConnection(ConnectionString);
using var conn3 = new FbConnection(ConnectionString);
conn1.Open();
conn2.Open();
conn3.Open();
ExecuteTxn(conn1, cmd => {
cmd.CommandText = "recreate table demo (id int primary key)";
cmd.ExecuteNonQuery();
});
ExecuteTxn(conn2, cmd => {
cmd.CommandText = "insert into demo (id) values (1)";
cmd.ExecuteNonQuery();
});
ExecuteTxn(conn3, cmd => {
cmd.CommandText = "drop table demo";
cmd.ExecuteNonQuery();
});
}
private static void ExecuteTxn(FbConnection conn, Action<FbCommand> todo) {
using (var txn = conn.BeginTransaction())
using (var cmd = conn.CreateCommand()) {
cmd.Transaction = txn;
todo(cmd);
txn.Commit();
}
}
I realized that changing the transaction options as
txn = conn.BeginTransaction(new FbTransactionOptions { TransactionBehavior = FbTransactionBehavior.Wait }))
seems to help. But I'm not sure if this the right thing to do or just a coincidence...
Using Firebird 3.0.6, FirebirdSql.Data.FirebirdClient.dll 7.5.0.0
