Overview
Use the stream attributes properties tab to specify the characteristics of the the data in a table column.
...
| Field | Description | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 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:
| ||||||||||
| Filter conditions are case-independent by default |
| ||||||||||
| Key |
| ||||||||||
| 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. CHECK THIS |
...
Which fields can have "null"?
String
Apply a string type to sequences of characters (i.e., letters, numerals, symbols and punctuation marks). By default string attribute types have a fixed length of 50. The minimum length is 1 and the maximum length is 4000.
do we need to tell users about any information-loss if data that is naturally a different type gets loaded as a string?
Anchor Bigstring Bigstring
Bigstring
| Bigstring | |
| Bigstring |
...
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.
What happens if you attempt to load a float or decimal number into an integer attribute? If you store a number with decimal places as an integer it will be truncated.
...
| Note |
|---|
Ensure your decimal type has the number of decimal places you need for your data. Once the data is loaded into PhixFlow, you will not be able to recover excess decimal places. |
Date
Apply a date type to representations of a calendar day.
Are there any specific formats to say are recognised/not recognised?
What about word formats e.g. Word formats, such as Tuesday the fourteenth of February? Words are are not recognised except . However, three letter month abbreviations eg are recognised, for example: 14 Feb 2019 is accepted.
"yyyyMMdd",
"dd/MM/yy",
"dd MM yy",
"dd-MM-yy",
"MM/dd/yy",
"MM dd yy",
"MM d yy",
"MM-dd-yy"
"dd/MMM/yy",
"dd-MMM-yy",
"dd MMM yy",
"MMM/dd/yy",
"MMM-dd-yy",
"MMM dd yy",
"MMM d yy"
"dd/MM/yyyy",
"dd-MM-yyyy",
"dd MM yyyy",
"MM/dd/yyyy",
"MM-dd-yyyy",
"MM dd yyyy",
"MM d yyyy"
"dd-MMM-yyyy",
"dd/MMM/yyyy",
"dd MMM yyyy",
"MMM/dd/yyyy",
"MMM-dd-yyyy",
"MMM dd yyyy",
"MMM d yyyy"
Datetime
Apply a datetime The following date formats, have:
- y represents year digits
- M represents month digits or MMM represents three letters
- d represents day digits
- separators can be forward slash / hyphen - or a space.
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.
Are there any specific formats to say are recognised/not recognised?
datetime must be day and time, can't be just a time.
Same formats as for date but with It cannot be used to represent a time alone.
Datetimes can have any of the above date formats followed by a space separator and HH:mm:ss on the end.
"yyyyMMdd.HHmmss"
"dd/MM/yy HH:mm:ss",
"dd-MM-. for example MM/dd/yy HH:mm:ss",
"dd MM yy HH:mm:ss",
"MM/dd/yy HH:mm:ss",
"MM-dd-yy HH:mm:ss",
"MM dd yy HH:mm:ss",
"MM d yy HH:mm:ss"
"dd/MMM/yy HH:mm:ss",
"dd-MMM-yy HH:mm:ss",
"dd MMM yy HH:mm:ss",
"MMM/dd/yy HH:mm:ss",
"MMM-dd-yy HH:mm:ss",
"MMM dd yy HH:mm:ss",
"MMM d yy HH:mm:ss"
"dd/MM/yyyy HH:mm:ss",
"dd-MM-yyyy HH:mm:ss",
"dd MM yyyy HH:mm:ss",
"MM/dd/yyyy HH:mm:ss",
"MM-dd-yyyy HH:mm:ss",
"MM dd yyyy HH:mm:ss",
"MM d yyyy HH:mm:ss"
"dd/MMM/yyyy HH:mm:ss",
"dd-MMM-yyyy HH:mm:ss",
"dd MMM yyyy HH:mm:ss",
"MMM/dd/yyyy HH:mm:ss",
"MMM-dd-yyyy HH:mm:ss",
"MMM dd yyyy HH:mm:ss",
"MMM d yyyy HH:mm:ss"
Graphic
Is this still available?
TrueFalse
Apply a TrueFalse type to fields that can have the values true or false.
What happens if the field is empty? Or has something other than True/False?
The value saved is always true or false. It is true if it is a number other than 0, the string "true", "t", "yes", "y" (case insensitive), or for a list if all items in the list are true. Anything else is false, so empty/null is false. represents a datetime such as 02/14/19 15:35:06.
- H represents hour digits (24 hour)
- m represents minute digits
- s represents second digits
- time separators are colons :
The international datetime uses a full stop/period as a separator between the date and time, yyyyMMdd.HHmmss, for example 20190214.15:35:06.
Graphic
Is this still available?
TrueFalse
Apply a TrueFalse type to fields that can have the values true or false.
The values that are saved as true are:
- any number other than 0
- for a list: all items in the list are true
- the following case-insensitive strings
- true
- t
- yes
- y
The values that are saved as false are:
- 0 (zero)
- any string not listed as true above
- an empty/null field