LENGTH function

The LENGTH function is used for string manipulation on all string data types (BIT, BLOB, and CHARACTER) and returns an integer value giving the number of singletons in source_string.

SYNTAX

It If the source_string is NULL, the result is the NULL value. The term singleton refers to a single part (BIT, BYTE, or CHARACTER) within a string of that type.

For example:
LENGTH('Hello World!');
returns 12.
LENGTH('');
returns 0.
Related concepts
ESQL overview
Related tasks
Developing ESQL
Related reference
Syntax diagrams: available types
ESQL string manipulation functions