JDBC (Java Database Connectivity) Reader/Writer

Note: Licensing options for reading this format begin with FME Professional edition. Licensing options for writing this format begin with FME Database edition.


The JDBC reader and writer modules provide FME with access to attribute data held in databases accessible via JDBC. It provides generic non-spatial access to a wide number of database formats through JDBC drivers. The advantage of the JDBC is that it is available on all platforms supported by FME.

Once configured, the JDBC format allows access to many database formats.

See Getting Started with JDBC.

See the FME Community for information about the compatibility of various JDBC drivers with FME, and to view Workbench examples.

Usage Notes

The performance of this format is dependent on the amount of memory allocated to the Java Virtual Machine (JVM). The following environment variables allow you to specify memory available to Java Plugins:

  • FME_JVM_MIN_HEAP_SIZE: Initial heap size for initializing the JVM.
  • FME32_JVM_MIN_HEAP_SIZE: Same as FME_JVM_MIN_HEAP_SIZE, but applies to 32-bit FME Desktop on Windows, and takes precedence over FME_JVM_MIN_HEAP_SIZE.

  • FME_JVM_MAX_HEAP_SIZE: Maximum heap size for initializing the JVM.
  • FME32_JVM_MAX_HEAP_SIZE: Same as FME_JVM_MAX_HEAP_SIZE, but applies to 32-bit FME Desktop on Windows, and takes precedence over FME_JVM_MAX_HEAP_SIZE.

These variables must be set for FME to honor them, and must be multiples of 1024K (for example, 4M and 64M, or 4096K and 32768K).

Note: To pass additional parameters used by FME to the Java Virtual Machine, use the JAVA_TOOL_OPTIONS environment variable.

FME Community