ES|QL `TO_TEXT` function

Converts a value to text.

Syntax

field: Input value. The input can be a single- or multi-valued column or an expression.
options: (Optional) Additional options as function named parameters.

Converts an input value into text.

field	options	result
keyword		text
text		text

analyzer: (keyword) The analyzer applied to the values of the resulting text column, playing the role the mapping's analyzer plays for an indexed text field. Defaults to standard. Must name a registered (prebuilt or plugin-provided) analyzer, and is only accepted on expressions that are not backed by an index-mapped field.

		ROW a = ["this", "is", "a", "text"]
| EVAL text_a = TO_TEXT(a)

a:keyword	text_a:text
[this, is, a, text]	[this, is, a, text]