Indexes, Primary Keys, or Unique Keys wizard (MySQL)
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The Indexes Wizard, Primary Keys Wizard, and Unique Keys wizard offer the same steps in creating these MySQL objects.
To create a new index, primary key, or unique key using a wizard:
- Open a creation wizard for an index, primary key, or unique key. For details, see Opening an Object Wizard.
- Use the following topics as a guide to setting properties and performing tasks as you pass through the wizard panels:
- Properties panel - for details, see Indexes, Primary Keys, or Unique Keys - Properties
- DDL View panel - for details, see Previewing the DDL Generated to Create the New Object.
- Finally, use the Execute button to create the object. For more information, see Previewing the DDL Generated to Create the New Object.
Indexes, Primary Keys, or Unique Keys - Properties
When creating or editing an index, primary key, or unique key, this tab/panel lets you work with the following settings:
| Setting | Description |
|---|---|
|
Table Name |
Select the table on which you want to create the object. |
|
Index Name |
Provide a name of up to 64 alphanumeric characters. |
|
Constraint Type |
Primary: Each record of a table is identified as uniquely and relates to a foreign key in another table. Unique: Ensures that there is no duplication between values in columns where you place this constraint. Full Text: Enables the search for several words in arbitrary order in a table. Spatial: Allows you to find records that are defined by location, or geometry types. |
|
Index Storage Type |
Hash: Used for equality comparisons. Only whole keys can be used to search for a row. BTree: Tree data structure that keeps data sorted. BTrees grow from the bottom up as elements are inserted. RTree: Tree data structure used for spatial indexes and access to multidimensional information. |
|
Specify Columns in Index |
Columns are listed by name and datatype and whether or not they are nullable. As you check selections, the sort order is identified. |