Function like_prefix_pattern 

fn like_prefix_pattern(prefix: &str) -> String

LIKE uses % and _ as wildcard characters. By default MySQL uses a backslash as an escape character but that can be disabled via config, so we instead specify a specific escape character. LIKE operator: https://dev.mysql.com/doc/refman/8.0/en/string-comparison-functions.html#operator_like Backslash escapes: https://dev.mysql.com/doc/refman/8.0/en/sql-mode.html#sqlmode_no_backslash_escapes