Select and entity and then set a distribution key for Amazon Redshift Data Warehouse according to the table below. Setting a distribution key for Amazon Redshift Data Warehouse Note that depending on the selected Distribution Style (Amazon Redshift) or Distribution Method (Microsoft Azure Synapse Analytics), some of the options may not be available. Therefore, you will need an IAM role for your Redshift cluster that has an Amazon. This section describes how to set a custom distribution key for tables created in Amazon Redshift and Microsoft Azure Synapse Analytics. Redshift needs an authorization to access the Glue Data Catalog and the data on S3. WITH (HEAP) Setting Custom Distribution Keys In the following example, the Compose CREATE TABLE statement (rows 1-5) is appended with an SQL part instructing Compose to create the table as a HEAP (row 6). Click OK to close the editor and save your SQL parts.Įxample of a Valid Table Creation Modifier.Therefore, make sure to validate the SQL before deploying in a production environment. For instance, if you are validatingĬompose does not provide any way of validating your SQL. Optionally, but strongly recommended, validate the SQL in an external validation tool that supports your specific database and version. Enter the SQL parts you wish to append to the CREATE TABLE statement.Click the Edit button to open the Table Creation Modifier editor.In the Physical Model tab, select the desired entity.The procedure for settings table modifiers is as follows: By default, Compose creates tables in Microsoft Azure Synapse Analytics as a CLUSTERED COLUMNSTORE INDEX, which offers the best overall query performance for large tables. For example, in Microsoft Azure Synapse Analytics, it’s possible to create a table as a HEAP, which is optimized for smaller tables. However, organizations often need tables to be created with custom properties for better performance, special permissions, custom collation, and so on. The default distribution key for all data warehouse tables is the ID column.īy default, Compose creates tables in the data warehouse using the standard CREATE TABLE statement.Supported with Microsoft Azure Synapse Analytics and Amazon Redshift only.Although this can also be done using the Custom option (see below), the Custom distribution keys option is more convenient as it does not require any prior SQL knowledge. Leveraging this option requires SQL coding knowledge.Ĭustom distribution keys - This option is useful if you only need to define custom distribution keys for individual entities. Custom - This option is useful for appending additional table properties to the default Compose CREATE TABLE statement.Project settings default - When this option is selected (the default), the settings from the project settings' Table creation modifiers tab will be used. The available options are located below the Columns list on the right of the tab, and are as follows: You can set table modifiers for individual entities in the Physical Model tab, thereby overriding the default settings in the project settings' Table creation modifiers tab Table modifiers allow you to append additional table properties to the default Compose CREATE TABLE statement. Defining Table Creation Modifiers ON THIS PAGE
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