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Use the attributes properties tab to specify the characteristics of the data in a grid column.  You can open attribute properties from:

  • the repository. Attributes are listed under their stream
  • the Stream properties → Attributes section
  • other attribute lists. 

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Basic Settings

FieldDescription
Name

Enter the name of the attribute.

Tip

PhixFlow recognises the attribute name UID as a unique identifier for a record. As records are added, PhixFlow automatically increments the UID value.


Type

Select the type of data this attribute contains; see Understanding Data Types.

  • String
  • Bigstring
  • Integer
  • Float
  • Decimal
  • Date
  • Datetime
  • Graphic
  • TrueFalse

Length

This field is available when Type is String. By default strings are 50 characters long. Optionally specify a different string length of between 1 and 4000.

For strings longer than 4000 characters, set a Type of Bigstring. 

Precision

This field is available when Type is Integer. Enter the maximum number of digits allowed in whole numbers. By default, integers are 10 digits long. Optionally specify a different integer precision of between 1 digit and 38 digits.

Significant FiguresThis field is available when Type is Decimal. Enter the maximum number of total digits for decimal numbers.  By default decimals have 10 significant figures.


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To specify numbers must have two digits before and after the decimal point, such as 12.34, enter:

Significant Figures  4

Decimal Places  2



Decimal Places

This field is available when Type is Decimal. Enter the maximum number of digits allowed after the decimal point. By default, decimals have 2 decimal places.

This must be less than the number of significant figures.

Local

 

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 to keep both stream data and any result of using it in a calculation. 

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 if you need to use the attribute in a stream calculation, but you do not need to keep the result.

Order

The order of the attributes in the stream. Attribute expressions are evaluated in this order. 

This is important when you need to use the results of a calculation in another attribute:

  • either in its expression
  • or in a $ variable.

In the attribute list, the attribute that calculates the result must come before the attribute that requires the result.

ExpressionThe expression used to generate the attribute value. This is written as a PhixFlow Expression. It must evaluate to a single value, of the type specified in the Type field.

Advanced

FieldDescription
Indexed

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 to prevent this attribute being indexed in the PhixFlow database.

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 to index this attribute in the PhixFlow database.

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 the stream data
  • sort or group the stream data.
Filter conditions are
case-independent by default

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 to use filters that are case-sensitive.

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 to set new filter conditions on this attribute to be case-insensitive by default. The filter window → Ignore Case check box inherits this setting; see Filters on Data Views. For case-insensitive filters, there is no difference if the attribute is also indexed. 

Note
This option affects the behaviour of filters for PhixFlow instances running on Oracle or MariaDB (MySQL) databases.
For PhixFlow instances running on a SQL Server database, filters are always case-independent.


Key

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 for in-memory stream, to specify that this field is not a key value.

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 for in-memory stream, to specify that this field will be used as a key value. 

Translate Values 
Anchor
translate
translate

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 to ignore this attribute when translating text in PhixFlow (the default).

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 to include this attribute when translating text that appears in PhixFlow. To be translated, the attribute text must be included in a translation stream; see Translating an Application Interface and Translation Table.

Cache Key

Enter an expression to be evaluated for each stream-item (record) in the stream. The expression can:

  • either use the value of this attribute
  •  or calculate a different value

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. 

Access Permissions

For details about how to control access to an attribute, see Common Properties → Access Permissions.