util

func UnescapeChar ¶

func UnescapeChar(b byte) []byte

UnescapeChar returns the unescaped byte(s) for a MySQL backslash escape sequence. Given the byte after the backslash, it returns the replacement byte(s). For most escapes this is a single byte; for \% and \_ both the backslash and the character are preserved.

See https://dev.mysql.com/doc/refman/8.0/en/string-literals.html

\" \' \\ \n \0 \b \Z \r \t ==> escape to one char
\% \_ ==> preserve both chars
other ==> remove backslash