The pg_ts_config catalog contains entries representing text search configurations. A configuration specifies a particular text search parser

The catalog pg_opfamily defines operator families. Each operator family is a collection of operators and associated support routines that implement

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

The pg_ts_parser catalog contains entries defining text search parsers. A parser is responsible for splitting input text into lexemes and assigning

The view pg_rules provides access to useful information about query rewrite rules. Table

The catalog pg_seclabel stores security labels on database objects. Security labels can be manipulated with the

The catalog pg_attrdef stores column default values. The main information about columns is stored in pg_attribute

The catalog pg_tablespace stores information about the available tablespaces. Tables can be placed in particular tablespaces to aid administration

The catalog pg_database stores information about the available databases. Databases are created with the

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