MAP

Description

Constructs a Map<K, V> of a specific type using some set of key-value pairs

Syntax

MAP( <key1> , <value1> [, <key2>,<value2> ... ])

Parameters

Parameter	Description
<key>	Constructing the key of the map
<value>	Constructing the value of the map

Return Value

Returns a specific type Map<K, V> constructed from a number of key-value pairs

Example

select map(1, "100", 0.1, 2),map(1, "100", 0.1, 2)[1];

+---------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------+
| map(cast(1 as DECIMALV3(2, 1)), '100', cast(0.1 as DECIMALV3(2, 1)), cast(2 as TEXT)) | element_at(map(cast(1 as DECIMALV3(2, 1)), '100', cast(0.1 as DECIMALV3(2, 1)), cast(2 as TEXT)), cast(1 as DECIMALV3(2, 1))) |
+---------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------+
| {1.0:"100", 0.1:"2"}                                                                  | 100                                                                                                                           |
+---------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------+