protected override void VisitDurationFunctionToken(DurationFunctionToken token)
{
State.Write(MySqlSymbols.TIMESTAMPDIFF);
State.AddToTheEnd(Symbols.OpenParenthesis);
switch (token.DatePart)
{
case DatePart.Day:
State.Write(MySqlSymbols.DAY);
break;
case DatePart.Year:
State.Write(MySqlSymbols.YEAR);
break;
case DatePart.Month:
State.Write(MySqlSymbols.MONTH);
break;
case DatePart.Week:
State.Write(MySqlSymbols.WEEK);
break;
case DatePart.Hour:
State.Write(MySqlSymbols.HOUR);
break;
case DatePart.Minute:
State.Write(MySqlSymbols.MINUTE);
break;
case DatePart.Second:
State.Write(MySqlSymbols.SECOND);
break;
case DatePart.Millisecond:
State.Write(MySqlSymbols.MICROSECOND);
break;
}
State.Write(Symbols.Comma);
VisitToken(token.Start);
State.Write(Symbols.Comma);
VisitToken(token.End);
State.Write(Symbols.CloseParenthesis);
if (token.DatePart == DatePart.Millisecond)
{
State.Write(Symbols.DIV);
State.Write(MySqlSymbols.milisecondInSecond);
}
}
private void VisitDurationTokenWithDiff(DatePart datePart, DurationFunctionToken token)
{
State.Write(Symbols.OpenParenthesis);
State.Write(PostgrSQLSymbols.DATEPART);
State.Write(Symbols.OpenParenthesis);
switch (datePart)
{
case DatePart.Day:
State.Write(this.AddSingleQuotes(PostgrSQLSymbols.d));
break;
case DatePart.Year:
State.Write(this.AddSingleQuotes(PostgrSQLSymbols.yy));
break;
case DatePart.Month:
State.Write(this.AddSingleQuotes(PostgrSQLSymbols.m));
break;
case DatePart.Week:
State.Write(this.AddSingleQuotes(PostgrSQLSymbols.ww));
break;
case DatePart.Hour:
State.Write(this.AddSingleQuotes(PostgrSQLSymbols.hh));
break;
case DatePart.Minute:
State.Write(this.AddSingleQuotes(PostgrSQLSymbols.mi));
break;
case DatePart.Second:
State.Write(this.AddSingleQuotes(PostgrSQLSymbols.ss));
break;
case DatePart.Millisecond:
State.Write(this.AddSingleQuotes(PostgrSQLSymbols.ms));
break;
}
State.Write(Symbols.Comma);
VisitToken(token.Start);
State.Write(Symbols.MinusVal);
VisitToken(token.End);
State.Write(Symbols.CloseParenthesis);
State.Write(Symbols.CloseParenthesis);
}
protected override void VisitDurationFunctionToken(DurationFunctionToken token)
{
State.Write(Symbols.DATEDIFF);
State.Write(Symbols.OpenParenthesis);
switch (token.DatePart)
{
case DatePart.Day:
State.Write(PostgrSQLSymbols.d);
break;
case DatePart.Year:
State.Write(PostgrSQLSymbols.yy);
break;
case DatePart.Month:
State.Write(PostgrSQLSymbols.m);
break;
case DatePart.Week:
State.Write(PostgrSQLSymbols.ww);
break;
case DatePart.Hour:
State.Write(PostgrSQLSymbols.hh);
break;
case DatePart.Minute:
State.Write(PostgrSQLSymbols.mi);
break;
case DatePart.Second:
State.Write(PostgrSQLSymbols.ss);
break;
case DatePart.Millisecond:
State.Write(PostgrSQLSymbols.ms);
break;
}
State.Write(Symbols.Comma);
VisitToken(token.Start);
State.Write(Symbols.Comma);
VisitToken(token.End);
State.Write(Symbols.CloseParenthesis);
}
protected override void VisitDurationFunctionToken(DurationFunctionToken token)
{
switch (token.DatePart)
{
case DatePart.Day:
//DATE_PART('day', end - start)
State.Write(Symbols.OpenParenthesis);
this.VisitDurationTokenWithDiff(DatePart.Day, token);
State.Write(Symbols.CloseParenthesis);
break;
case DatePart.Year:
//DATE_PART('year', end) - DATE_PART('year', start)
State.Write(Symbols.OpenParenthesis);
VisitToken(Sql.Year(token.Start));
State.Write(Symbols.MinusVal);
VisitToken(Sql.Year(token.End));
State.Write(Symbols.CloseParenthesis);
break;
case DatePart.Month:
//years_diff * 12 + (DATE_PART('month', end) - DATE_PART('month', start))
State.Write(Symbols.OpenParenthesis);
VisitToken(Sql.DurationInYears(token.Start, token.End));
State.Write(Symbols.MultiplyVal);
State.Write(PostgrSQLSymbols.monthsInYear); //month in year
State.Write(Symbols.PlusVal);
State.Write(Symbols.OpenParenthesis);
VisitToken(Sql.Month(token.Start));
State.Write(Symbols.MinusVal);
VisitToken(Sql.Month(token.End));
State.Write(Symbols.CloseParenthesis);
State.Write(Symbols.CloseParenthesis);
break;
case DatePart.Week:
//TRUNC(DATE_PART('day', end - start) / 7)
State.Write(Symbols.OpenParenthesis);
State.Write(Symbols.TRUNC);
State.Write(Symbols.OpenParenthesis);
this.VisitDurationTokenWithDiff(DatePart.Day, token);
State.Write(Symbols.DivideVal);
State.Write(PostgrSQLSymbols.daysInWeek);
State.Write(Symbols.CloseParenthesis);
State.Write(Symbols.CloseParenthesis);
break;
case DatePart.Hour:
//days_diff * 24 + DATE_PART('hour', end - start )
State.Write(Symbols.OpenParenthesis);
VisitToken(Sql.DurationInDays(token.Start, token.End));
State.Write(Symbols.MultiplyVal);
State.Write(PostgrSQLSymbols.hoursInDay);
State.Write(Symbols.PlusVal);
this.VisitDurationTokenWithDiff(DatePart.Hour, token);
State.Write(Symbols.CloseParenthesis);
break;
case DatePart.Minute:
//hours_diff * 60 + DATE_PART('minute', end - start )
State.Write(Symbols.OpenParenthesis);
VisitToken(Sql.DurationInHours(token.Start, token.End));
State.Write(Symbols.MultiplyVal);
State.Write(PostgrSQLSymbols.minutesInHour);
State.Write(Symbols.PlusVal);
this.VisitDurationTokenWithDiff(DatePart.Minute, token);
State.Write(Symbols.CloseParenthesis);
break;
case DatePart.Second:
//minutes_diff * 60 + DATE_PART('second', end - start )
State.Write(Symbols.OpenParenthesis);
VisitToken(Sql.DurationInMinutes(token.Start, token.End));
State.Write(Symbols.MultiplyVal);
State.Write(PostgrSQLSymbols.secondInMinute);
State.Write(Symbols.PlusVal);
this.VisitDurationTokenWithDiff(DatePart.Second, token);
State.Write(Symbols.CloseParenthesis);
break;
case DatePart.Millisecond:
//seconds_diff * 1000 + DATE_PART('microsecond', end - start )/1000)
State.Write(Symbols.OpenParenthesis);
VisitToken(Sql.DurationInSeconds(token.Start, token.End));
State.Write(Symbols.MultiplyVal);
State.Write(PostgrSQLSymbols.milisecondInSecond);
State.Write(Symbols.PlusVal);
State.Write(Symbols.OpenParenthesis);
State.Write(Symbols.TRUNC);
State.Write(Symbols.OpenParenthesis);
this.VisitDurationTokenWithDiff(DatePart.Millisecond, token);
State.Write(Symbols.DivideVal);
State.Write(PostgrSQLSymbols.milisecondInSecond);
State.Write(Symbols.CloseParenthesis);
State.Write(Symbols.CloseParenthesis);
State.Write(Symbols.CloseParenthesis);
break;
}
}
protected abstract void VisitDurationFunctionToken(DurationFunctionToken token);
protected override void VisitDurationFunctionToken(DurationFunctionToken token)
{
State.Write(Symbols.CAST);
State.Write(Symbols.OpenParenthesis);
State.Write(Symbols.CAST);
State.Write(Symbols.OpenParenthesis);
State.Write(SqliteSymbols.strftime);
State.Write(Symbols.OpenParenthesis);
State.Write(Symbols.SingleQuote);
State.Write(Symbols.ModuloVal);
State.Write(SqliteSymbols.S);
State.Write(Symbols.SingleQuote);
State.Write(Symbols.Comma);
VisitToken(token.End);
State.Write(Symbols.CloseParenthesis);
State.Write(Symbols.MinusVal);
State.Write(SqliteSymbols.strftime);
State.Write(Symbols.OpenParenthesis);
State.Write(Symbols.SingleQuote);
State.Write(Symbols.ModuloVal);
State.Write(SqliteSymbols.S);
State.Write(Symbols.SingleQuote);
State.Write(Symbols.Comma);
VisitToken(token.Start);
State.Write(Symbols.CloseParenthesis);
State.Write(Symbols.CloseParenthesis);
State.Write(Symbols.AS);
State.Write(SqliteSymbols.REAL);
State.Write(Symbols.CloseParenthesis);
switch (token.DatePart)
{
case DatePart.Day:
State.Write(Symbols.DivideVal);
State.Write("86400");
break;
case DatePart.Year:
State.Write(Symbols.DivideVal);
State.Write("31536000.0");
break;
case DatePart.Month:
State.Write(Symbols.DivideVal);
State.Write("2592000.0");
break;
case DatePart.Week:
State.Write(Symbols.DivideVal);
State.Write("604800.0");
break;
case DatePart.Hour:
State.Write(Symbols.DivideVal);
State.Write("3600.0");
break;
case DatePart.Minute:
State.Write(Symbols.DivideVal);
State.Write("60.0");
break;
case DatePart.Second:
break;
case DatePart.Millisecond:
State.Write(Symbols.MultiplyVal);
State.Write("100.0");
break;
}
State.Write(Symbols.AS);
State.Write(SqliteSymbols.INTEGER);
State.Write(Symbols.CloseParenthesis);
}
