Pivotal Engineering Journal

Technical articles from Pivotal engineers.

Venkatesh Raghavan

Posts By Venkatesh Raghavan
  1. Merge Join Support In GPORCA We look at how FULL JOINS can be supported natively in GPORCA, allowing GPORCA to generate plans providing better query execution times. Categories:   Databases    Query Optimization    SQL    Greenplum    GPORCA    Full Join   
  2. GiST Support In GPORCA We look at how GIST indexes can be supported in GPORCA, allowing GPORCA to generate plans providing better query execution times. Categories:   Databases    Query Optimization    SQL    Greenplum    GPORCA    GiST   
  3. Profiling Query Compilation Time with GPORCA GPORCA is Pivotal’s Query Optimizer for Greenplum Database and Apache HAWQ (incubating). In this post, we describe how users can profile query compilation with GPORCA. This will aid users in understanding which of GPORCA’s steps is the most resource intensive, and what transformations are being triggered. Based on this information, users can provide query hints to reduce or increase the search space, see where the time and memory is being spent, and learn how to influence its decision making. Categories:   Databases    GPDB    HAWQ    PQO    GPORCA    Query Optimization    SQL   
  4. Improving Query Execution Speed via Code Generation A code generation based solution inside the GPDB execution engine. Categories:   GREENPLUM DATABASE    QUERY EXECUTION    CODE GENERATION