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| Current File : //usr/local/include/postgresql/server/tsearch/ts_utils.h |
/*-------------------------------------------------------------------------
*
* ts_utils.h
* helper utilities for tsearch
*
* Copyright (c) 1998-2008, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/include/tsearch/ts_utils.h,v 1.12 2008/01/01 19:45:59 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef _PG_TS_UTILS_H_
#define _PG_TS_UTILS_H_
#include "tsearch/ts_type.h"
#include "tsearch/ts_public.h"
#include "nodes/pg_list.h"
/*
* Common parse definitions for tsvector and tsquery
*/
/* tsvector parser support. */
struct TSVectorParseStateData; /* opaque struct in tsvector_parser.c */
typedef struct TSVectorParseStateData *TSVectorParseState;
extern TSVectorParseState init_tsvector_parser(char *input,
bool oprisdelim,
bool is_tsquery);
extern void reset_tsvector_parser(TSVectorParseState state, char *input);
extern bool gettoken_tsvector(TSVectorParseState state,
char **token, int *len,
WordEntryPos **pos, int *poslen,
char **endptr);
extern void close_tsvector_parser(TSVectorParseState state);
/* parse_tsquery */
struct TSQueryParserStateData; /* private in backend/utils/adt/tsquery.c */
typedef struct TSQueryParserStateData *TSQueryParserState;
typedef void (*PushFunction) (Datum opaque, TSQueryParserState state,
char *token, int tokenlen,
int2 tokenweights /* bitmap as described
* in QueryOperand
struct */ );
extern TSQuery parse_tsquery(char *buf,
PushFunction pushval,
Datum opaque, bool isplain);
/* Functions for use by PushFunction implementations */
extern void pushValue(TSQueryParserState state,
char *strval, int lenval, int2 weight);
extern void pushStop(TSQueryParserState state);
extern void pushOperator(TSQueryParserState state, int8 operator);
/*
* parse plain text and lexize words
*/
typedef struct
{
uint16 len;
uint16 nvariant;
union
{
uint16 pos;
/*
* When apos array is used, apos[0] is the number of elements in the
* array (excluding apos[0]), and alen is the allocated size of the
* array.
*/
uint16 *apos;
} pos;
char *word;
uint32 alen;
} ParsedWord;
typedef struct
{
ParsedWord *words;
int4 lenwords;
int4 curwords;
int4 pos;
} ParsedText;
extern void parsetext(Oid cfgId, ParsedText *prs, char *buf, int4 buflen);
/*
* headline framework, flow in common to generate:
* 1 parse text with hlparsetext
* 2 parser-specific function to find part
* 3 generateHeadline to generate result text
*/
extern void hlparsetext(Oid cfgId, HeadlineParsedText *prs, TSQuery query,
char *buf, int4 buflen);
extern text *generateHeadline(HeadlineParsedText *prs);
/*
* Common check function for tsvector @@ tsquery
*/
extern bool TS_execute(QueryItem *curitem, void *checkval, bool calcnot,
bool (*chkcond) (void *checkval, QueryOperand *val));
/*
* Useful conversion macros
*/
#define TextPGetCString(t) DatumGetCString(DirectFunctionCall1(textout, PointerGetDatum(t)))
#define CStringGetTextP(c) DatumGetTextP(DirectFunctionCall1(textin, CStringGetDatum(c)))
/*
* to_ts* - text transformation to tsvector, tsquery
*/
extern TSVector make_tsvector(ParsedText *prs);
extern Datum to_tsvector_byid(PG_FUNCTION_ARGS);
extern Datum to_tsvector(PG_FUNCTION_ARGS);
extern Datum to_tsquery_byid(PG_FUNCTION_ARGS);
extern Datum to_tsquery(PG_FUNCTION_ARGS);
extern Datum plainto_tsquery_byid(PG_FUNCTION_ARGS);
extern Datum plainto_tsquery(PG_FUNCTION_ARGS);
/*
* GiST support function
*/
extern Datum gtsvector_compress(PG_FUNCTION_ARGS);
extern Datum gtsvector_decompress(PG_FUNCTION_ARGS);
extern Datum gtsvector_consistent(PG_FUNCTION_ARGS);
extern Datum gtsvector_union(PG_FUNCTION_ARGS);
extern Datum gtsvector_same(PG_FUNCTION_ARGS);
extern Datum gtsvector_penalty(PG_FUNCTION_ARGS);
extern Datum gtsvector_picksplit(PG_FUNCTION_ARGS);
/*
* IO functions for pseudotype gtsvector
* used internally in tsvector GiST opclass
*/
extern Datum gtsvectorin(PG_FUNCTION_ARGS);
extern Datum gtsvectorout(PG_FUNCTION_ARGS);
/*
* GIN support function
*/
extern Datum gin_extract_tsvector(PG_FUNCTION_ARGS);
extern Datum gin_extract_tsquery(PG_FUNCTION_ARGS);
extern Datum gin_tsquery_consistent(PG_FUNCTION_ARGS);
/*
* Possible strategy numbers for indexes
* TSearchStrategyNumber - (tsvector|text) @@ tsquery
* TSearchWithClassStrategyNumber - tsvector @@@ tsquery
*/
#define TSearchStrategyNumber 1
#define TSearchWithClassStrategyNumber 2
/*
* TSQuery Utilities
*/
extern QueryItem *clean_NOT(QueryItem *ptr, int4 *len);
extern QueryItem *clean_fakeval(QueryItem *ptr, int4 *len);
typedef struct QTNode
{
QueryItem *valnode;
uint32 flags;
int4 nchild;
char *word;
uint32 sign;
struct QTNode **child;
} QTNode;
/* bits in QTNode.flags */
#define QTN_NEEDFREE 0x01
#define QTN_NOCHANGE 0x02
#define QTN_WORDFREE 0x04
typedef uint64 TSQuerySign;
#define TSQS_SIGLEN (sizeof(TSQuerySign)*BITS_PER_BYTE)
extern QTNode *QT2QTN(QueryItem *in, char *operand);
extern TSQuery QTN2QT(QTNode *in);
extern void QTNFree(QTNode *in);
extern void QTNSort(QTNode *in);
extern void QTNTernary(QTNode *in);
extern void QTNBinary(QTNode *in);
extern int QTNodeCompare(QTNode *an, QTNode *bn);
extern QTNode *QTNCopy(QTNode *in);
extern void QTNClearFlags(QTNode *in, uint32 flags);
extern bool QTNEq(QTNode *a, QTNode *b);
extern TSQuerySign makeTSQuerySign(TSQuery a);
extern QTNode *findsubquery(QTNode *root, QTNode *ex, QTNode *subs,
bool *isfind);
/*
* TSQuery GiST support
*/
extern Datum gtsquery_compress(PG_FUNCTION_ARGS);
extern Datum gtsquery_decompress(PG_FUNCTION_ARGS);
extern Datum gtsquery_consistent(PG_FUNCTION_ARGS);
extern Datum gtsquery_union(PG_FUNCTION_ARGS);
extern Datum gtsquery_same(PG_FUNCTION_ARGS);
extern Datum gtsquery_penalty(PG_FUNCTION_ARGS);
extern Datum gtsquery_picksplit(PG_FUNCTION_ARGS);
/*
* Parser interface to SQL
*/
extern Datum ts_token_type_byid(PG_FUNCTION_ARGS);
extern Datum ts_token_type_byname(PG_FUNCTION_ARGS);
extern Datum ts_parse_byid(PG_FUNCTION_ARGS);
extern Datum ts_parse_byname(PG_FUNCTION_ARGS);
/*
* Default word parser
*/
extern Datum prsd_start(PG_FUNCTION_ARGS);
extern Datum prsd_nexttoken(PG_FUNCTION_ARGS);
extern Datum prsd_end(PG_FUNCTION_ARGS);
extern Datum prsd_headline(PG_FUNCTION_ARGS);
extern Datum prsd_lextype(PG_FUNCTION_ARGS);
/*
* Dictionary interface to SQL
*/
extern Datum ts_lexize(PG_FUNCTION_ARGS);
/*
* Simple built-in dictionary
*/
extern Datum dsimple_init(PG_FUNCTION_ARGS);
extern Datum dsimple_lexize(PG_FUNCTION_ARGS);
/*
* Synonym built-in dictionary
*/
extern Datum dsynonym_init(PG_FUNCTION_ARGS);
extern Datum dsynonym_lexize(PG_FUNCTION_ARGS);
/*
* ISpell dictionary
*/
extern Datum dispell_init(PG_FUNCTION_ARGS);
extern Datum dispell_lexize(PG_FUNCTION_ARGS);
/*
* Thesaurus
*/
extern Datum thesaurus_init(PG_FUNCTION_ARGS);
extern Datum thesaurus_lexize(PG_FUNCTION_ARGS);
/*
* headline
*/
extern Datum ts_headline_byid_opt(PG_FUNCTION_ARGS);
extern Datum ts_headline_byid(PG_FUNCTION_ARGS);
extern Datum ts_headline(PG_FUNCTION_ARGS);
extern Datum ts_headline_opt(PG_FUNCTION_ARGS);
/*
* current cfg
*/
extern Datum get_current_ts_config(PG_FUNCTION_ARGS);
#endif /* _PG_TS_UTILS_H_ */