52.62. pg_ts_parser

pg_ts_parser

The pg_ts_parser catalog contains entries defining text search parsers. A parser is responsible for splitting input text into lexemes and assigning a token type to each lexeme. Since a parser must be implemented by C-language-level functions, creation of new parsers is restricted to database superusers.

PostgreSQL's text search features are described at length in Full Text Search.

Column Type Description
oid `oid` Row identifier
prsname `name` Text search parser name
prsnamespace `oid` (references pg_namespace.oid) The OID of the namespace that contains this parser
prsstart `regproc` (references pg_proc.oid) OID of the parser's startup function
prstoken `regproc` (references pg_proc.oid) OID of the parser's next-token function
prsend `regproc` (references pg_proc.oid) OID of the parser's shutdown function
prsheadline `regproc` (references pg_proc.oid) OID of the parser's headline function (zero if none)
prslextype `regproc` (references pg_proc.oid) OID of the parser's lextype function

Column Type

Description

oid oid

Row identifier

prsname name

Text search parser name

prsnamespace oid (references pg_namespace.oid)

The OID of the namespace that contains this parser

prsstart regproc (references pg_proc.oid)

OID of the parser's startup function

prstoken regproc (references pg_proc.oid)

OID of the parser's next-token function

prsend regproc (references pg_proc.oid)

OID of the parser's shutdown function

prsheadline regproc (references pg_proc.oid)

OID of the parser's headline function (zero if none)

prslextype regproc (references pg_proc.oid)

OID of the parser's lextype function

: pg_ts_parser Columns