elasticsearch/docs/reference/query-languages/esql/_snippets/functions/examples/to_string.md

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Examples

ROW a=10
| EVAL j = TO_STRING(a)

a:integer	j:keyword
10	"10"

It also works fine on multivalued fields:

ROW a=[10, 9, 8]
| EVAL j = TO_STRING(a)

a:integer	j:keyword
[10, 9, 8]	["10", "9", "8"]