D_KEYFIND (1)
search an index for a specific key value
SYNOPSIS
#include <typhoon.h>
d_keyfind(ulong keyid, void *buf)
DESCRIPTION
d_keyfind is used to lookup a record in a table via one of its
indexes. keyid specifies which index to search and buf contains
the value to search for. If the index contains more than
one occurrence of the key value (only possible for non-unique indexes)
d_keyfind returns the first one.
The id can be either the id of a compound key or a field that is a key
by itself.
If the key value was not found, d_keyfind returns S_NOTFOUND.
A subsequent call to d_keynext(1) returns next value in the sorting
order.
The actual record is not read from the database until d_recread(1) is
called.
DIAGNOSTICS
The status code returned by the function is also stored in the global
variable db_status.
S_OKAY
S_NOTFOUND
The key value was not found.
S_NOCD
There is no current database.
S_INVFLD
The id is not a valid field.
S_NOTKEY
The field id is not a key itself.
CURRENCY CHANGES
If S_OKAY is returned. the record found becomes the current record.
EXAMPLE
/* Find the customer called 'Pedersen' */
#include <typhoon.h>
if( d_keyfind(CUSTOMER_NAME, "Pedersen") == S_OKAY )
{
struct customer cust;
d_recread(&cust);
printf("Account number %lu\\n", cust.account);
}
IDENTIFICATION
Author: Thomas B. Pedersen.
Copyright (c) 1994 Thomas B. Pedersen.
SEE ALSO
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