pub fn substr(args: &[ArrayRef]) -> Result<ArrayRef>Available on crate feature
unicode_expressions only.Expand description
Extracts the substring of string starting at the start’th character, and extending for count characters if that is specified. (Same as substring(string from start for count).) substr(‘alphabet’, 3) = ‘phabet’ substr(‘alphabet’, 3, 2) = ‘ph’ The implementation uses UTF-8 code points as characters