DISTINCT ATTRIBUTE PATHS

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4D v20 R7


DISTINCT ATTRIBUTE PATHS ( objectField ; pathArray )

Parameter	Type	Description
objectField	Field	Indexed object field
pathArray	Text array	Array to receive list of distinct paths

Description

The DISTINCT ATTRIBUTE PATHS command returns the list of distinct paths found in the indexed object field you passed in objectField for the current selection of the table to which this field belongs.

In objectField, you must pass an Object type field that is indexed; otherwise, an error is returned.

After the call, the size of pathArray is equal to the number of distinct paths found in the selection. Paths to nested object attributes are returned using the standard dot notation, for example "company.address.number". Keep in mind that object attribute names are case-sensitive. The command does not change the current selection or the current record.

In pathArray, the list of distinct paths is returned in alphabetical (diacritic) order.

Notes:

Records with an undefined value in the objectField are not taken into account.
Attribute paths created during a transaction are taken into account by the command. It is important to note that these paths are kept in the index of the object field even if the transation has been canceled.

Example

Your database contains a [Customer]full_Data (indexed) object field with 15 records:

If you execute this code:

 ARRAY TEXT(aTPaths;0)

 ALL RECORDS([Customer])

 DISTINCT ATTRIBUTE PATHS([Customer]full_Data;aTPaths)

The aTPaths array receives the following elements:

Element	Value
1	"age"
2	"Children"
3	"Children[]"
4	"Children[].age"
5	"Children[].Name"
6	"Children.length"
7	"client"
8	"FirstName"
9	"LastName"
10	"Sex"
11	"telephone"
12	"telephone[]"
13	"telephone.length"

Note: "length" is a virtual property that is automatically available for all array type attributes. It provides the size of the array, i.e. the number of elements, and can be used in queries. For more information, please refer to the Using the .length virtual property paragraph.