# 52.60. 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 Chapter 12.

Table 52.60. pg_ts_parser Columns

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