ES|QL `STARTS_WITH` function

Syntax

Embedded

Parameters

str: String expression. If null, the function returns null.
prefix: String expression. If null, the function returns null.

Description

Returns a boolean that indicates whether a keyword string starts with another string.

Supported types

str	prefix	result
keyword	keyword	boolean
keyword	text	boolean
text	keyword	boolean
text	text	boolean

Example

		FROM employees
| KEEP last_name
| EVAL ln_S = STARTS_WITH(last_name, "B")
		
	

last_name:keyword	ln_S:boolean
Awdeh	false
Azuma	false
Baek	true
Bamford	true
Bernatsky	true