10-18-2010
It always helps to know what Operating System you have and to see the command you typed.
In this case we'd also need to know the amount of memory you can devote to this "sort".
The biggest single improvement to the unix "sort" command is usually to give it more memory at the outset with the "-y kmem" parameter and to put temporary files (-T parameter) on a fast disc with at least twice as much free space as the size of the original file.
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YAZ_SORT(3) 1 YAZ_SORT(3)
yaz_sort - Sets sorting criteria
SYNOPSIS
void yaz_sort (resource $id, string $criteria)
DESCRIPTION
This function sets sorting criteria and enables Z39.50 Sort.
Call this function beforeyaz_search(3). Using this function alone does not have any effect. When used in conjunction with yaz_search(3), a
Z39.50 Sort will be sent after a search response has been received and before any records are retrieved with Z39.50 Present
(yaz_present(3).
PARAMETERS
o $id
- The connection resource returned by yaz_connect(3).
o $criteria
- A string that takes the form field1 flags1 field2 flags2 where field1 specifies the primary attributes for sort, field2 seconds,
etc.. The field specifies either a numerical attribute combinations consisting of type=value pairs separated by comma (e.g.
1=4,2=1) ; or the field may specify a plain string criteria (e.g. title. The flags is a sequence of the following characters
which may not be separated by any white space.
Sort Flags
o a - Sort ascending
o d - Sort descending
o i - Case insensitive sorting
o s - Case sensitive sorting
RETURN VALUES
No value is returned.
EXAMPLES
Example #1
Sort Criterias
To sort on Bib1 attribute title, case insensitive, and ascending you would use the following sort criteria:
1=4 ia
If the secondary sorting criteria should be author, case sensitive and ascending you would use:
1=4 ia 1=1003 sa
PHP Documentation Group YAZ_SORT(3)