Categories:

Semi-structured and Structured Data Functions (Map)

MAP_SIZE

Returns the size of a MAP.

Syntax

MAP_SIZE( <map> )
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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;
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+----------+
| MAP_SIZE |
|----------|
|        3 |
+----------+