ES|QL MV_MIN function
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Serverless
Generally available
Stack
Generally available
Returns the smallest value from a multi-value field.
field-
Expression that can be null, a single value, or multiple values.
Converts a multivalued expression into a single valued column containing the minimum value.
| field | result |
|---|---|
| boolean | boolean |
| date | date |
| date_nanos | date_nanos |
| double | double |
| integer | integer |
| ip | ip |
| keyword | keyword |
| long | long |
| text | keyword |
| unsigned_long | unsigned_long |
| version | version |
ROW a=[2, 1]
| EVAL min_a = MV_MIN(a)
| a:integer | min_a:integer |
|---|---|
| [2, 1] | 1 |
It can be used by any column type, including keyword columns. In that case, it picks the first string, comparing their utf-8 representation byte by byte:
ROW a=["foo", "bar"]
| EVAL min_a = MV_MIN(a)
| a:keyword | min_a:keyword |
|---|---|
| ["foo", "bar"] | "bar" |