MAP_PICK (Lakehouse v1)

Returns a new MAP containing the specified key-value pairs from an existing MAP.

SQL Syntax

MAP_PICK( <map>, <key1> [, <key2>, ... ] )
MAP_PICK( <map>, <array> )

Arguments

Arguments	Description
<map>	The input MAP.
<keyN>	The KEYs to be included from the returned MAP.
<array>	The Array of KEYs to be included from the returned MAP.

Note

• The types of the key expressions and the keys in the map must be the same.
• Key values not found in the map will be ignored.

Return Type

Map.

SQL Examples

SELECT MAP_PICK({'a':1,'b':2,'c':3}, 'a', 'c');
┌─────────────────────────────────────────┐
│ map_pick({'a':1,'b':2,'c':3}, 'a', 'c') │
├─────────────────────────────────────────┤
│ {'a':1,'c':3}                           │
└─────────────────────────────────────────┘

SELECT MAP_PICK({'a':1,'b':2,'c':3}, ['a', 'b']);
┌───────────────────────────────────────────┐
│ map_pick({'a':1,'b':2,'c':3}, ['a', 'b']) │
├───────────────────────────────────────────┤
│ {'a':1,'b':2}                             │
└───────────────────────────────────────────┘