2/11/2024 0 Comments Surplus flat files usedIn cases where large volumes of data are to be extracted and little transformation is required, you can use the flat file operator. When you use a flat file operator, Warehouse Builder generates SQL*Loader code. If the data is to be joined with other tables or requires complex transformations, use an external table. When you use an external table operator, the mapping generates SQL code. To decide between the two options, consider how the data must be transformed. You can introduce data from a flat file into a mapping either through an external table or a flat file operator. If changes are made to the structure of the flat file, update the file definition.Įxternal Table Operators versus Flat File Operators For more information, refer to "External Table Operators versus Flat File Operators" and "Creating a New External Table Definition". If you intend to use the file as a source, consider the advantages of creating an external table based on the file. Use the flat file as either a source or a target in a mapping. In such cases, see "Adding Existing Binary Files to the Repository". The wizard enables you to sample and define common flat file formats such as string and ascii.įor files with complex record structures, the Flat File Sample Wizard may not be suitable for sampling the data. The Flat File Sample Wizard enables you to view a sample of the flat file and define record organization and file properties. On the Connection Information page, select the option to launch the Flat File Sample Wizard. Use the Import Metadata Wizard to select the flat files you wish to import. Using the Import Metadata Wizard for Flat Files If the Warehouse Builder client and data files reside on Windows operating systems, store the data files on any drive the Warehouse Builder client machine can access.Ĭreate a module for each folder in your file system from which you want to sample existing files. If you are accessing the data files directly, and if the Warehouse Builder client and the data files reside on different types of operating systems, contact your system administrator to establish the required connectivity through NFS or other network protocol. To import flat file definitions, complete the following steps:Įstablish network connectivity to the files you wish to import. Importing ASCII Files into the Repository
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |