Among all relational operators the most difficult one to process and optimize is the join. The number of possible query plans grows exponentially with

PostgreSQL is implemented using a simple "process per user" client/server model. In this model there is one

The parser stage consists of two parts: The parser defined in gram

The GIN interface has a high level of abstraction, requiring the access method implementer only to implement the semantics of the data type

The core PostgreSQL distribution includes the GIN operator classes shown in Table 63-1. (Some of the optional

Here we give a short overview of the stages a query has to pass in order to obtain a result.

This section covers implementation details and other tricks that are useful for implementers of SP-GiST operator classes to know.

61.4.1. GiST buffering build Building large GiST indexes by simply inserting all the tuples tends to be slow, because if the index

The following resources contain additional information about genetic algorithms:

The PostgreSQL source distribution includes several examples of index methods implemented using GiST. The