Relational Data - Aggregate Functions - Reference - Minmap

From FojiSoft Docs

Calculates the minimum from value array according to the keys specified in the key array.

Syntax 

`minMap(key, value)`

or 

minMap(Tuple(key, value))

Alias: minMappedArrays

  • Passing a tuple of keys and value arrays is identical to passing an array of keys and an array of values.
  • The number of elements in key and value must be the same for each row that is totaled.


Parameters

  • key — Array of keys. Array.
  • value — Array of values. Array.

Returned value

  • Returns a tuple of two arrays: keys in sorted order, and values calculated for the corresponding keys. Tuple(Array, Array).

Example

Query: 

SELECT minMap(a, b)
FROM values('a Array(Int32), b Array(Int64)', ([1, 2], [2, 2]), ([2, 3], [1, 1]))

Result: 

┌─minMap(a, b)──────┐
│ ([1,2,3],[2,1,1]) │
└───────────────────┘
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