AstBuilder.java 文件源码

private static IntervalLiteral.IntervalField getIntervalFieldType(Token token)
{
    switch (token.getType()) {
        case SqlBaseLexer.YEAR:
            return IntervalLiteral.IntervalField.YEAR;
        case SqlBaseLexer.MONTH:
            return IntervalLiteral.IntervalField.MONTH;
        case SqlBaseLexer.DAY:
            return IntervalLiteral.IntervalField.DAY;
        case SqlBaseLexer.HOUR:
            return IntervalLiteral.IntervalField.HOUR;
        case SqlBaseLexer.MINUTE:
            return IntervalLiteral.IntervalField.MINUTE;
        case SqlBaseLexer.SECOND:
            return IntervalLiteral.IntervalField.SECOND;
    }

    throw new IllegalArgumentException("Unsupported interval field: " + token.getText());
}