Index and View Index Checks (PDM)

PowerDesigner provides default model checks to verify the validity of indexes and view indexes.

Check

Description and Correction

Name and code uniqueness

Depending on the DBMS, a model or a table cannot contain two indexes with identical name and/or code.

Manual correction: Modify the duplicate name/code

Automatic correction: Appends a number to the duplicate name/code

Index code maximum length

The index code length is limited by the maximum length specified in the DBMS definition (MaxLen entry, in the Objects > Index category) or in the naming conventions of the model options.

Manual correction: Modify the index code length to meet this requirement

Automatic correction: Truncates the index code length to the maximum length specified in the DBMS definition

Existence of index column

An index must have at least one index column.

Manual correction: Add an index column from the Column tab of the index property sheet or delete the index

Automatic correction: Deletes the index without column

Undefined index type

[indexes] An index type must be specified.

Manual correction: Specify a type in the index property sheet or delete the index with no type

Automatic correction: None

Index column count

The current DBMS does not support more than the number of index columns specified in the MaxColIndex entry of the current DBMS.

Manual correction: Delete one or more columns in the index property sheet. You can create additional indexes for these columns

Automatic correction: None

Uniqueness forbidden for HNG index type

[indexes] An index of HNG (HighNonGroup) type cannot be unique.

Manual correction: Change the index type or set the index as non unique

Automatic correction: None

Index inclusion

An index should not include another index.

Manual correction: Delete the index that includes an existing index

Automatic correction: None