The view pg_user provides access to information about database users. This is simply a publicly readable view of

Refer back to the queries in Section 2.6. Suppose the combined listing

It is frequently convenient to group users together to ease management of privileges: that way, privileges can be granted to, or revoked from, a group as a whole. In

Each heap and index relation, except for hash indexes, has a Free Space Map (FSM) to keep track of available space in the relation. It's stored alongside the main relation

NameALTER LANGUAGE -- change the definition of a procedural language Synopsis

SQL UNION constructs must match up possibly dissimilar types to become a single result set. The resolution algorithm is applied separately to each

The xml data type can be used to store XML data. Its advantage over storing XML data in a text field is that it checks the

Create vs. insert Insertion into a GIN index can be slow due to the likelihood of many keys

This module implements a data type seg for representing line segments, or floating point intervals. seg can represent uncertainty

The catalog pg_extension stores information about the installed extensions. See Section 36.15 for details about extensions.