Licensing options for this format begin with FME Professional Edition.
The BigQuery Reader module enables FME to read BigQuery attribute data.
Technology Preview
Note: The BigQuery Reader is still under active development, so please expect changes to the current behavior.
Overview
BigQuery is a managed NoSQL database service offered by Google. The BigQuery reader communicates using HTTP requests managed by the Google APIs Client Library for Java.
This chapter assumes familiarity with BigQuery.
For more information, please visit the BigQuery home at
https://cloud.google.com/products/bigquery/
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.
Reader Overview
When reading from BigQuery, each table is considered a feature type in FME and each row of a table is one feature in FME as long as there are no repeated fields.
In general, large volumes of data may not be read from BigQuery. A WHERE clause may be specified to limit the amount of data read. Alternatively, choosing a destination table and enabling “Allow Large Results” will allow large volumes of data to be read.
Open the Workbench Google BigQuery Reader: Feature Type Parameters to view the table list options.