question: public static boolean isRewritableBatch ( String queryString , boolean noBackslashEscapes ) { LexState state = LexState . Normal ; char lastChar = '\0' ; boolean singleQuotes = false ; boolean endingSemicolon = false ; char [ ] query = queryString . toCharArray ( ) ; int queryLength = query . length ; for ( int i = 0 ; i < queryLength ; i ++ ) { if ( state == LexState . Escape ) state = LexState . String ; char car = query [ i ] ; switch ( car ) { case '*' : if ( state == LexState . Normal && lastChar == '/' ) state = LexState . SlashStarComment ; break ; case '/' : if ( state == LexState . SlashStarComment && lastChar == '*' ) { state = LexState . Normal ; } else if ( state == LexState . Normal && lastChar == '/' ) { state = LexState . EOLComment ; } break ; case '#' : if ( state == LexState . Normal ) state = LexState . EOLComment ; break ; case '-' : if ( state == LexState . Normal && lastChar == '-' ) { state = LexState . EOLComment ; } break ; case ';' : if ( state == LexState . Normal ) { endingSemicolon = true ; } break ; case '\n' : if ( state == LexState . EOLComment ) { state = LexState . Normal ; } break ; case '"' : if ( state == LexState . Normal ) { state = LexState . String ; singleQuotes = false ; } else if ( state == LexState . String && ! singleQuotes ) { state = LexState . Normal ; } break ; case '\'' : if ( state == LexState . Normal ) { state = LexState . String ; singleQuotes = true ; } else if ( state == LexState . String && singleQuotes ) { state = LexState . Normal ; } break ; case '\\' : if ( noBackslashEscapes ) { break ; } if ( state == LexState . String ) state = LexState . Escape ; break ; case '`' : if ( state == LexState . Backtick ) { state = LexState . Normal ; } else if ( state == LexState . Normal ) { state = LexState . Backtick ; } break ; default : if ( state == LexState . Normal && endingSemicolon && ( ( byte ) car >= 40 ) ) { endingSemicolon = false ; } break ; } lastChar = car ; } return state != LexState . EOLComment && ! endingSemicolon ; }
target:  Valid that query is valid (no ending semi colon, or end-of line comment ).