PostgreSQL

51.60. `pg_ts_parser`
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51.60. `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 51.60. pg_ts_parser Columns

Name Type References Description

Name	Type	References	Description
`oid`	`oid`		Row identifier (hidden attribute; must be explicitly selected)
`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