The TPCDS connector provides a set of schemas to support the TPC Benchmark™ DS (TPC-DS). TPC-DS is a database benchmark used to measure the performance of complex decision support databases.
This connector can also be used to test the capabilities and query syntax of openLooKeng without configuring access to an external data source. When you query a TPCDS schema, the connector generates the data on the fly using a deterministic algorithm.
To configure the TPCDS connector, create a catalog properties file
etc/catalog/tpcds.properties with the following contents:
The TPCDS connector supplies several schemas:
SHOW SCHEMAS FROM tpcds;
Schema -------------------- information_schema sf1 sf10 sf100 sf1000 sf10000 sf100000 sf300 sf3000 sf30000 tiny (11 rows)
Ignore the standard schema
information_schema which exists in every catalog and is not directly provided by the TPCDS connector.
Every TPCDS schema provides the same set of tables. Some tables are identical in all schemas. The scale factor of the tables in a particular schema is determined from the schema name. For example, the schema
sf1 corresponds to scale factor
1 and the schema
sf300 corresponds to scale factor
300. Every unit in the scale factor corresponds to a gigabyte of data. For example, for scale factor
300, a total of
300 gigabytes will be generated. The
tiny schema is an alias for scale factor
0.01, which is a very small data set useful for testing.