MAP_SIZE¶

Syntax¶

MAP_SIZE( <map> )

Arguments¶

map

The input map.

Returns¶

Returns the number of entries in the map.

Examples¶

Determine the number of entries in a map:

SELECT MAP_SIZE({'a':1,'b':2,'c':3}::MAP(VARCHAR,NUMBER))
  AS map_size;

+----------+
| MAP_SIZE |
|----------|
|        3 |
+----------+