[P1cheneG]

No description provided.

[MrTeeett]

There remains the case where there are zero changes within the EXECUTE BLOCK.

The table pr30_live_counts(id integer primary key, val integer) contains a single row: (1, 10). Let's execute the block:

execute block as
  declare v integer;
begin
  select id
    from pr30_live_counts
    where id = 1
    into :v;

  update pr30_live_counts
    set val = val + 1
    where id = -1;
end

The block read one row, but the UPDATE did not change anything. The server returns:

• StatementType = 8 (isc_info_sql_stmt_exec_procedure);
• SelectCount = 1;
• InsertCount = UpdateCount = DeleteCount = 0.

The data in the table remains unchanged. However, RowsAffected() returns 1 instead of the expected 0. This is reproducible via fbconn and database/sql.

The reason is that when modifiedCount == 0, the system switches to SelectCount, even though an anonymous block with zero changes was executed.