dbalttype

Returns the data type for a compute column.

Syntax

INT dbalttype (
PDBPROCESS dbproc,
INT computeid,
INT column );

Arguments

dbproc

The DBPROCESS structure that is the handle for a particular workstation/ Microsoft® SQL Server™ process. It contains all the information that DB-Library uses to manage communications and data between the workstation and SQL Server.

computeid

The ID that identifies the COMPUTE clause. A SELECT statement can have multiple COMPUTE clauses, which can have varying numbers of aggregate operators and aggregate targets. The computeid is returned by dbnextrow or dbgetrow.

column

The number of the column. The first column is number 1.

Returns

The type of the data for the particular column in the compute. The types are defined as follows:

Call dbalttype only after dbnextrow or dbgetrow returns a computeid.

If either the computeid or column is invalid, -1 is returned.

Examples

In the following SELECT statements, calling dbalttype(dbproc, 1, 1) returns the type for SQLINT4 because counts are of SQLINT4 type.

SELECT dept, name FROM employee
ORDER BY dept, name
COMPUTE COUNT(name) BY dept

To convert the type to a readable string, use dbprtype.

See Also