NameCREATE USER MAPPING -- define a new mapping of a user to a foreign server

The view pg_shadow exists for backwards compatibility: it emulates a catalog that existed in PostgreSQL before

Each index access method is described by a row in the pg_am

The amcostestimate function is given information describing a possible index scan, including lists of WHERE and ORDER BY clauses that have been

The results of two queries can be combined using the set operations union, intersection, and difference. The syntax is

The catalog pg_proc stores information about functions (or procedures). See

An index can be defined on more than one column of a table. For example, if you have a table of this form:

NameALTER AGGREGATE -- change the definition of an aggregate function Synopsis

One might need to insert a large amount of data when first populating a database. This section contains some suggestions on how to make this process as efficient as possible

NameCREATE TRANSFORM -- define a new transform Synopsis