Overview
Use the stream attributes properties tab to specify the characteristics of the the data in a table column. You can open attribute properties from:
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| Indexed |
To improve performance, index an attribute when the stream has a large data set and an output pipe from the stream uses this attribute to:
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| Filter conditions are case-independent by default |
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| Key |
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| Cache Key | Enter an expression to be evaluated for each stream item (data record) in the stream. The expression can:
Once calculated, the cache key value persists throughout subsequent stream calculation, rather than being created from scratch for each stream item as normal. This allows you to keep track of the calculation as it progresses. This means you can use a "persistent" attribute value in other expressions. |
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| Anchor | ||||
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All stream attributes have a data type. When loading data from a source, such as a file or database, PhixFlow applies the data type from the source. If there is no data type specified, PhixFlow applies the default type of string.
You can change the type of a stream attribute before the data has been loaded into the stream.
Once the stream contains data, you may be able to change the data type, depending on the database on which PhixFlow runs. PhixFlow reports an error if you are not permitted to change the data type. In this case you can rollback all stream sets so that the stream no longer contains data; see Rollback.
String
Apply a string type to sequences of characters, such as letters, numerals, symbols and punctuation marks. By default string attribute types have a default length of 50. However you can configure a minimum length of 1 and a maximum length of 4000.
Anchor Bigstring Bigstring
Bigstring
| Bigstring | |
| Bigstring |
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The maximum bigstring size can be configured in System Configuration → System Tuning → Maximum Bigstring Size.
Integer
Apply an integer type to whole numbers (not a fractions or decimals) that can be positive, negative, or zero. The number of digits in an integer indicates its precision.
- The default precision is 10 digits
- The minimum precision is 1 digit
- The maximum precision is 38
If you store a number with decimal places as an integer it will be truncated.
Float
Apply a float type float type to non-integer numbers with an undefined level of precision.
Anchor Decimal Decimal
Decimal
| Decimal | |
| Decimal |
Apply a decimal type decimal type to non-integer numbers with a set level of precision. Decimals have a specific number of:
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The default number of decimal places is set in System Configuration → General Settings → Decimal places.
Date
Apply a date type to representations of a calendar day. Word formats, such as Tuesday the fourteenth of February are not recognised. However, three letter month abbreviations are recognised, for example: 14 Feb 2019.
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The default number of date format is set in System Configuration → General Settings → Default Date Format.
Recognised Date Formats
- the international standard format has not separators and is yyyyMMdd, for example 20190214.
- the following variations (examples shown with space separators).
| 14 02 2019 | 14 Feb 2019 | 02 14 2019 | Feb 14 2019 |
|---|---|---|---|
| dd/MM/yyyy | dd-MMM-yyyy | MM/dd/yyyy | MMM/dd/yyyy |
| dd-MM-yyyy | dd/MMM/yyyy | MM-dd-yyyy | MMM-dd-yyyy |
| dd MM yyyy | dd MMM yyyy | MM dd yyyy | MMM dd yyyy |
| MM d yyyy | MMM d yyyy | ||
| 14 02 19 | 14 Feb 19 | 02 14 19 | Feb 14 19 |
| dd/MM/yy | dd/MMM/yy | MM/dd/yy | MMM/dd/yy |
| dd MM yy | dd-MMM-yy | MM-dd-yy | MMM-dd-yy |
| dd-MM-yy | dd MMM yy | MM dd yy | MMM dd yy |
| MM d yy | MMM d yy |
Datetime
Apply a datetime type to representations of a day and a time. It cannot be used to represent a time alone.
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The default number of date format is set in System Configuration → General Settings → Default Date/Time Format.
Graphic
Is this still available?Apply a graphic type to fields that contain image files.
TrueFalse
Apply a TrueFalse type to fields that can have the values that represent true or false.
The values that are saved as represent true are:
- any number other than 0
- for a list: all items in the list are true
- the following case-insensitive strings
truetyesy.
The values that are saved as represent false are:
- 0 (zero)
- any string not listed as true above including
false - an empty/null field.