Performs a query on an InterBase database. If the query
is not successful, returns
FALSE. If it is successful and there are resulting
rows (such as with a SELECT query), returns a result
identifier. If the query was successful and there were no
results, returns TRUE.
Returns FALSE if the query
fails.
See also ibase_errmsg(),
ibase_fetch_row(),
ibase_fetch_object(), and
ibase_free_result().