The catalog pg_aggregate stores information about aggregate functions. An aggregate function is a function that operates on a set of values

Functions and triggers allow users to insert code into the backend server that other users might execute unintentionally. Hence, both mechanisms permit users to "Trojan

For enum types (described in Section 8.7), there are several functions that allow cleaner programming

NameABORT -- abort the current transaction Synopsis

These settings control the behavior of the built-in streaming replication feature (see Section 26.2.5). Servers will be either a Master or a Standby

NameALTER OPERATOR CLASS -- change the definition of an operator class Synopsis

NameDROP EXTENSION -- remove an extension Synopsis

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

Table 9-39, Table 9-40 and Table 9-41 summarize the functions and operators that are provided for full text searching. See Chapter 12 for a detailed explanation of

NameDROP SCHEMA -- remove a schema Synopsis