1 Version 4.0 -- 5/1/89 dbaltcolid
______________________________________________________________________
NAME: dbaltcolid
FUNCTION:
Return the column id for a compute column.
SYNTAX:
int dbaltcolid(dbproc, computeid, column)
DBPROCESS *dbproc;
int computeid;
int column;
dbaltcolid Version 4.0 -- 5/1/89 2
______________________________________________________________________
COMMENTS:
o This routine returns the select-list id for a compute column.
For example, given the SQL statement:
select dept, name from employee
order by dept, name
compute count(name) by dept
the call dbaltcolid(dbproc, 1, 1) will return 2, since name is
the second column in the select-list.
PARAMETERS:
dbproc - A pointer to the DBPROCESS structure that provides the
connection for a particular front end/SQL Server process. It
contains all the information that DB-Library uses to manage
communications and data between the front end and SQL Server.
3 Version 4.0 -- 5/1/89 dbaltcolid
______________________________________________________________________
computeid - The id that identifies the particular compute row of
interest. A SQL SELECT statement may have multiple COMPUTE
clauses, each of which returns a separate compute row. The
computeid corresponding to the first COMPUTE clause in a
SELECT is 1. The computeid is returned by dbnextrow() or
dbgetrow().
column - The number of the compute column of interest. The
first column in a select-list is 1.
RETURNS:
The select-list id for the compute column. The first column in a
select-list is 1. If either the computeid or the column are
invalid, dbaltcolid() returns -1.
SEE ALSO:
dbadata, dbadlen, dbaltlen, dbgetrow, dbnextrow, dbnumalts,
dbprtype