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The Transformation Language
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- ROUND (Numbers)
- RPAD
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- TAN
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- TO_BIGINT
- TO_CHAR (Dates)
- TO_CHAR (Numbers)
- TO_DATE
- TO_DECIMAL
- TO_FLOAT
- TO_INTEGER
- TRUNC (Dates)
- TRUNC (Numbers)
- UPPER
- VARIANCE
Creating Custom Functions
Custom Function API Reference

Transformation Language Reference

10.5.1
- 10.5.6
- 10.5
- 10.4.0

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Julian Day, Modified Julian Day, and the Gregorian Calendar

You can use dates in the Gregorian calendar system only. Dates in the Julian calendar are called Julian dates
and are not supported in Informatica. This term should not be confused with Julian Day
or with Modified Julian Day.

You can manipulate Modified Julian Day (MJD) formats using the J format string. The MJD for a given date is the number of days to that date since Jan 1 4713 B.C. 00:00:00 (midnight). By definition, MJD includes a time component expressed as a decimal, which represents some fraction of 24 hours. The J format string does not convert this time component.

For example, the following TO_DATE expression converts strings in the SHIP_DATE_MJD_STRING port to date values in the default date format:

TO_DATE (SHIP_DATE_MJD_STR, 'J')

SHIP_DATE_MJD_STR	RETURN_VALUE
2451544	Dec 31 1999 00:00:00.000000000
2415021	Jan 1 1900 00:00:00.000000000

SHIP_DATE_MJD_STR	RETURN_VALUE
2451544	Dec 31 1999 00:00:00.000000000
2415021	Jan 1 1900 00:00:00.000000000

Because the J format string does not include the time portion of a date, the return values have the time set to 00:00:00.000000000.

You can also use the J format string in TO_CHAR expressions. For example, use the J format string in a TO_CHAR expression to convert date values to MJD values expressed as strings. For example: