Difference between revisions of "Dbicache()"

Latest revision as of 13:19, 1 May 2009

PURPOSE

specify size of the index cache

SYNOPSIS

#include "dbl.h"
 
	int	dbicache(size)
 
	<input parameter>
	int	size;		/* Index cache size in blocks */
 
	<output parameters>
	none

RETURN VALUE

The dbicache() function returns 0 for success, or < 0 if an error occurs. See the section on return code values for a detailed list of return codes.

DESCRIPTION

The dbicache() function is used to specify the size of the index cache in 512 byte disk blocks. Index caching improves performance of index operations.

EXAMPLE

The following example sets the icache (index cache) to 100 then creates an .NDX file "person.ndx" whose key expression, length and type are "SSN", 10 and 'C' respectively. "SSN" is a field name of the associated .DBF file.

#include "dbl.h"
	int	rc;	/* Return code */
 
	rc = dbicache(100);
	if (rc = = SUCCESS){
		rc = dbicreat("person.ndx", "SSN", 10, 'C');
		if (rc == SUCCESS){
			printf("index person created \n");
		} else {
			printf("error number %d \n", rc);
			exit (1);
		}
	} else {
		printf("error number %d \n", rc);
		exit (1);
	}

SEE ALSO

dbdcache(), dbiclose(), dbicreat(), dbiopen()