Table of Contents

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  1. Preface
  2. Introduction to Data Engineering Streaming
  3. Data Engineering Streaming Administration
  4. Sources in a Streaming Mapping
  5. Targets in a Streaming Mapping
  6. Streaming Mappings
  7. Window Transformation
  8. Appendix A: Connections
  9. Appendix B: Monitoring REST API Reference
  10. Appendix C: Sample Files

Add Columns

Add Columns

When you create a data object, you can specify the columns in one or more column families in an HBase table.
When you add an HBase table as the resource for an HBase data object, all the column families in the HBase table appear. If you know the details of the columns in the column families, you can select a column family and add the column details. In the
Column Families
dialog box, select the column family to which you want to add the columns. Column details include column name, data type, precision, and scale.
Although data is stored in binary format in HBase tables, you can specify the associated data type of the column to transform the data. To avoid data errors or incorrect data, verify that you specify the correct data type for the columns.
Verify that you specify valid column details when you add columns to avoid unexpected run-time behaviors. If you do not specify a value for a column when you write data to an HBase table, the Data Integration Service specifies a null value for the column at run time.
If the HBase table has more that one column family, you can add column details for multiple column families when you create the data object. Select one column family at a time and add the columns details. The column family name is the prefix for all the columns in the column family for unique identification.