Note: Licensing options for reading this format begin with FME Professional edition. Licensing options for writing this format begin with FME Database edition.
Overview
The JDBC reader and writer modules provide FME with access to attribute data held in databases accessible via JDBC. Once configured, the JDBC format allows access to many database formats.
For maximum compatibility, drivers must be JDBC version 4.0 or 4.1.
See Getting Started with JDBC.
See the FME Knowledge Center 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. Default value is 1024K.
- FME_JVM_MAX_HEAP_SIZE: Maximum heap size for initializing JVM. Default value is 16384K.
If unset, the JVM applies the default values. If set, the values 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.