48.71. pg_ts_parser
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48.71. 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.

LightDB's text search features are described at length in Chapter 13.

Table 48.71. 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

prslextype regproc (references pg_proc.oid)

OID of the parser's lextype function


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