Performs case folding of the input string according to the collation.
Signatures & examples
casefold ( text ) → text
Performs case folding of the input string according to the collation. Case folding is similar to case conversion, but the purpose of case folding is to facilitate case-insensitive matching of strings, whereas the purpose of case conversion is to convert to a particular cased form. This function can only be used when the server encoding is UTF8.Version history 1