MAPSIZE

Returns the number of virtual columns present in any VMap data. Use this scalar function to determine the size of keys.

Syntax

MAPSIZE(VMap_data)

Arguments

VMap_data

Any VMap data. The VMap can exist as:

  • The __raw__ column of a flex table
  • Data returned from a map function such as maplookup()
  • Other database content

Examples

This example shows the returned sizes from the number of keys in the flex table darkmountain:

=> SELECT MAPSIZE(__raw__) FROM darkmountain;
 mapsize
---------
       3
       4
       4
       4
       4
(5 rows)

See Also