ES|QL MV_CONCAT function
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Serverless
Generally available
Stack
Generally available
Concatenates multi-value strings with a delimiter.
string- Expression that can be null, a single value, or multiple values.
delim-
Delimiter.
Converts a multivalued string expression into a single valued column containing the concatenation of all values separated by a delimiter.
| string | delim | result |
|---|---|---|
| keyword | keyword | keyword |
| keyword | text | keyword |
| text | keyword | keyword |
| text | text | keyword |
ROW a=["foo", "zoo", "bar"]
| EVAL j = MV_CONCAT(a, ", ")
| a:keyword | j:keyword |
|---|---|
| ["foo", "zoo", "bar"] | "foo, zoo, bar" |
To concat non-string columns, call TO_STRING first:
ROW a=[10, 9, 8]
| EVAL j = MV_CONCAT(TO_STRING(a), ", ")
| a:integer | j:keyword |
|---|---|
| [10, 9, 8] | "10, 9, 8" |