Re: integer[] Update Questions

Well, CVS version (7.3) of contrib/intarray has:
FUNCTIONS:

  int   icount(int[]) - the number of elements in intarray
  int[] sort(int[], 'asc' | 'desc') - sort intarray
  int[] sort(int[]) - sort in ascending order
  int[] sort_asc(int[]),sort_desc(int[]) - shortcuts for sort
  int[] uniq(int[]) - returns unique elements
  int   idx(int[], int item) - returns index of first intarray matching element to item, or
                              '0' if matching failed.
  int[] subarray(int[],int START [, int LEN]) - returns part of intarray starting from
                                                element number START (from 1) and length LEN.

OPERATIONS:


  int[] && int[]  - overlap - returns TRUE if arrays has at least one common elements.
  int[] @  int[]  - contains - returns TRUE if left array contains right array
  int[] ~ int[]   - contained - returns TRUE if left array is contained in right array
  # int[]         - return the number of elements in array
  int[] + int     - push element to array ( add to end of array)
  int[] + int[]   - merge of arrays (right array added to the end of left one)
  int[] - int     - remove entries matched by right argument from array
  int[] - int[]   - remove left array from right
  int[] | int     - returns intarray - union of arguments
  int[] | int[]   - returns intarray as a union of two arrays
  int[] & int[]   - returns intersection of arrays


I don't remember if I have a patch for 7.2

    Oleg
On 23 Aug 2002, Ryan Mahoney wrote:

> Greeting Hackers! Had some questions about integer array type...
>
> If I have a integer[] field in a table, which already has the values
> {1,2,3,6,17} and I additionally want to add the value '45' to this
> array, is there any easier way than SELECTing the current values and
> then updating the entire record?
>
> I see that I could do:
> UPDATE table SET array_field[6] = 45 WHERE ...
>
> But how do I know that 6 is the correct index without first SELECTing
> all the data?
>
> Is there an array push/pop function?  Is there a method of counting the
> number of integers in an array?
>
> Thanks for any help you can provide - indexable integer arrays are an
> incredible feature, thanks for the hard work!
>
> Ryan Mahoney
>
> ---------------------------(end of broadcast)---------------------------
> TIP 4: Don't 'kill -9' the postmaster
>

    Regards,
        Oleg
_____________________________________________________________
Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
Sternberg Astronomical Institute, Moscow University (Russia)
Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/
phone: +007(095)939-16-83, +007(095)939-23-83