Table of Contents

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  1. Preface
  2. Introduction to Informatica Big Data Management
  3. Mappings in the Hadoop Environment
  4. Mapping Sources in the Hadoop Environment
  5. Mapping Targets in the Hadoop Environment
  6. Mapping Transformations in the Hadoop Environment
  7. Processing Hierarchical Data on the Spark Engine
  8. Configuring Transformations to Process Hierarchical Data
  9. Processing Unstructured and Semi-structured Data with an Intelligent Structure Model
  10. Stateful Computing on the Spark Engine
  11. Monitoring Mappings in the Hadoop Environment
  12. Mappings in the Native Environment
  13. Profiles
  14. Native Environment Optimization
  15. Cluster Workflows
  16. Connections
  17. Data Type Reference
  18. Function Reference
  19. Parameter Reference

Hive Sources

Hive Sources

You can include Hive sources in an Informatica mapping that runs in the Hadoop environment.
Consider the following limitations when you configure a Hive source in a mapping that runs in the Hadoop environment:
  • A mapping fails to run when you have Unicode characters in a Hive source definition.
  • The third-party Hive JDBC driver does not return the correct precision and scale values for the Decimal data type. As a result, when you import Hive tables with a Decimal data type into the Developer tool, the Decimal data type precision is set to 38 and the scale is set to 0. Consider the following configuration rules and guidelines based on the version of Hive:
    • Hive 0.11. Accept the default precision and scale for the Decimal data type in the Developer tool.
    • Hive 0.12. Accept the default precision and scale for the Decimal data type in the Developer tool.
    • Hive 0.12 with Cloudera CDH 5.0. You can configure the precision and scale fields for source columns with the Decimal data type in the Developer tool.
    • Hive 0.13 and above. You can configure the precision and scale fields for source columns with the Decimal data type in the Developer tool.
    • Hive 0.14 or above. The precision and scale used for the Decimal data type in the Hive database also appears in the Developer tool.
A mapping that runs on the Spark engine can have partitioned Hive source tables and bucketed sources.


Updated October 23, 2019