PostgreSQL

51.61. `pg_ts_parser`
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51.61. `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 51.61. pg_ts_parser Columns

Name Type References Description

Name	Type	References	Description
`oid`	`oid`		Row identifier
`prsname`	`name`		Text search parser name
`prsnamespace`	`oid`	`pg_namespace.oid`	The OID of the namespace that contains this parser
`prsstart`	`regproc`	`pg_proc.oid`	OID of the parser’s startup function
`prstoken`	`regproc`	`pg_proc.oid`	OID of the parser’s next-token function
`prsend`	`regproc`	`pg_proc.oid`	OID of the parser’s shutdown function
`prsheadline`	`regproc`	`pg_proc.oid`	OID of the parser’s headline function
`prslextype`	`regproc`	`pg_proc.oid`	OID of the parser’s lextype function

oid

Row identifier

prsname

name

Text search parser name

prsnamespace

oid

pg_namespace.oid

The OID of the namespace that contains this parser

prsstart

regproc

pg_proc.oid

OID of the parser’s startup function

prstoken

regproc

pg_proc.oid

OID of the parser’s next-token function

prsend

regproc

pg_proc.oid

OID of the parser’s shutdown function

prsheadline

regproc

pg_proc.oid

OID of the parser’s headline function

prslextype

regproc

pg_proc.oid

OID of the parser’s lextype function

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51.61. pg_ts_parser

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51.61. `pg_ts_parser`