public void Build(ISqExtensionBuilder builder)
{
string?partStr = null;
var part = builder.GetValue <DateParts>("part");
switch (part)
{
case DateParts.Year: partStr = "Y"; break;
case DateParts.Quarter:
builder.Expression = "Cast(strFTime('%m', {date}) as int)";
builder.ResultExpression = builder.Inc(builder.Div(builder.Dec(builder.ConvertToSqlExpression(Precedence.Primary)), 3));
return;
case DateParts.Month: partStr = "m"; break;
case DateParts.DayOfYear: partStr = "j"; break;
case DateParts.Day: partStr = "d"; break;
case DateParts.Week: partStr = "W"; break;
case DateParts.WeekDay:
builder.Expression = "Cast(strFTime('%w', {date}) as int)";
builder.ResultExpression = builder.Inc(builder.ConvertToSqlExpression(Precedence.Primary));
return;
case DateParts.Hour: partStr = "H"; break;
case DateParts.Minute: partStr = "M"; break;
case DateParts.Second: partStr = "S"; break;
case DateParts.Millisecond:
builder.Expression = "Cast(strFTime('%f', {date}) * 1000 as int) % 1000";
builder.Extension.Precedence = Precedence.Multiplicative;
break;
default:
throw new InvalidOperationException($"Unexpected datepart: {part}");
}
if (partStr != null)
{
builder.AddExpression("part", partStr);
}
}
public void Build(ISqExtensionBuilder builder)
{
string partStr;
var part = builder.GetValue <DateParts>("part");
switch (part)
{
case DateParts.Year: partStr = "year"; break;
case DateParts.Quarter:
builder.Expression = "Extract(Month from {date})";
builder.ResultExpression = builder.Inc(builder.Div(builder.Dec(builder.ConvertToSqlExpression(Precedence.Primary)), 3));
return;
case DateParts.Month: partStr = "month"; break;
case DateParts.DayOfYear: partStr = "yearday"; break;
case DateParts.Day: partStr = "day"; break;
case DateParts.Week: partStr = "week"; break;
case DateParts.WeekDay: partStr = "weekday"; break;
case DateParts.Hour: partStr = "hour"; break;
case DateParts.Minute: partStr = "minute"; break;
case DateParts.Second: partStr = "second"; break;
case DateParts.Millisecond: partStr = "millisecond"; break;
default:
throw new InvalidOperationException($"Unexpected datepart: {part}");
}
builder.AddExpression("part", partStr);
switch (part)
{
case DateParts.DayOfYear:
case DateParts.WeekDay:
builder.ResultExpression = builder.Inc(builder.ConvertToSqlExpression(Precedence.Primary));
break;
}
}
public void Build(ISqExtensionBuilder builder)
{
string exprStr;
var part = builder.GetValue <DateParts>("part");
switch (part)
{
case DateParts.Year: exprStr = "Year({date})"; break;
case DateParts.Quarter:
{
builder.Expression = "Month({date})";
builder.ResultExpression =
builder.Inc(builder.Div(builder.Dec(builder.ConvertToSqlExpression(Precedence.Primary)), 3));
return;
}
case DateParts.Month: exprStr = "Month({date})"; break;
case DateParts.DayOfYear:
{
var param = builder.GetExpression("date");
builder.ResultExpression = builder.Inc(
builder.Sub <int>(
new SqlFunction(typeof(DateTime?), "Mdy",
new SqlFunction(typeof(int?), "Month", param),
new SqlFunction(typeof(int?), "Day", param),
new SqlFunction(typeof(int?), "Year", param)),
new SqlFunction(typeof(DateTime?), "Mdy",
new SqlValue(1),
new SqlValue(1),
new SqlFunction(typeof(int?), "Year", param)))
);
return;
}
case DateParts.Day: exprStr = "Day({date})"; break;
case DateParts.Week: exprStr = "((Extend({date}, year to day) - (Mdy(12, 31 - WeekDay(Mdy(1, 1, year({date}))), Year({date}) - 1) + Interval(1) day to day)) / 7 + Interval(1) day to day)::char(10)::int"; break;
case DateParts.WeekDay:
{
builder.Expression = "weekDay({date})";
builder.ResultExpression = builder.Inc(builder.ConvertToSqlExpression(Precedence.Primary));
return;
}
case DateParts.Hour: exprStr = "({date}::datetime Hour to Hour)::char(3)::int"; break;
case DateParts.Minute: exprStr = "({date}::datetime Minute to Minute)::char(3)::int"; break;
case DateParts.Second: exprStr = "({date}::datetime Second to Second)::char(3)::int"; break;
case DateParts.Millisecond: exprStr = "Millisecond({date})"; break;
default:
throw new InvalidOperationException($"Unexpected datepart: {part}");
}
builder.Expression = exprStr;
}
