Amazon Redshift will no longer support the creation of new Python UDFs starting November 1, 2025.
If you would like to use Python UDFs, create the UDFs prior to that date.
Existing Python UDFs will continue to function as normal. For more information, see the
blog post
IS_CHAR function
Checks whether a value is a CHAR
. The IS_CHAR function returns true
for strings that
have only ASCII characters, because the CHAR type can store only characters that are in the
ASCII format. The function returns false
for any other values.
Syntax
IS_CHAR(super_expression)
Arguments
- super_expression
-
A
SUPER
expression or column.
Return type
BOOLEAN
Examples
To check if t
is a CHAR
using the IS_CHAR function, use the following example.
CREATE TABLE t(s SUPER); INSERT INTO t VALUES ('t'); SELECT s, IS_CHAR(s) FROM t;
+-----+---------+ | s | is_char | +-----+---------+ | "t" | true | +-----+---------+