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blue-lemon0104
280
pg_include/tsearch/ts_utils.h
Executable file
280
pg_include/tsearch/ts_utils.h
Executable file
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/*-------------------------------------------------------------------------
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*
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* ts_utils.h
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* helper utilities for tsearch
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*
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* Copyright (c) 1998-2012, PostgreSQL Global Development Group
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*
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* src/include/tsearch/ts_utils.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef _PG_TS_UTILS_H_
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#define _PG_TS_UTILS_H_
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#include "tsearch/ts_type.h"
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#include "tsearch/ts_public.h"
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#include "nodes/pg_list.h"
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/*
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* Common parse definitions for tsvector and tsquery
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*/
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/* tsvector parser support. */
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struct TSVectorParseStateData; /* opaque struct in tsvector_parser.c */
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typedef struct TSVectorParseStateData *TSVectorParseState;
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extern TSVectorParseState init_tsvector_parser(char *input,
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bool oprisdelim,
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bool is_tsquery);
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extern void reset_tsvector_parser(TSVectorParseState state, char *input);
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extern bool gettoken_tsvector(TSVectorParseState state,
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char **token, int *len,
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WordEntryPos **pos, int *poslen,
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char **endptr);
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extern void close_tsvector_parser(TSVectorParseState state);
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/* parse_tsquery */
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struct TSQueryParserStateData; /* private in backend/utils/adt/tsquery.c */
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typedef struct TSQueryParserStateData *TSQueryParserState;
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typedef void (*PushFunction) (Datum opaque, TSQueryParserState state,
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char *token, int tokenlen,
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int2 tokenweights, /* bitmap as described
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* in QueryOperand
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* struct */
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bool prefix);
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extern TSQuery parse_tsquery(char *buf,
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PushFunction pushval,
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Datum opaque, bool isplain);
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/* Functions for use by PushFunction implementations */
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extern void pushValue(TSQueryParserState state,
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char *strval, int lenval, int2 weight, bool prefix);
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extern void pushStop(TSQueryParserState state);
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extern void pushOperator(TSQueryParserState state, int8 oper);
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/*
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* parse plain text and lexize words
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*/
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typedef struct
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{
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uint16 len;
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uint16 nvariant;
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union
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{
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uint16 pos;
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/*
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* When apos array is used, apos[0] is the number of elements in the
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* array (excluding apos[0]), and alen is the allocated size of the
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* array.
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*/
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uint16 *apos;
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} pos;
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uint16 flags; /* currently, only TSL_PREFIX */
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char *word;
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uint32 alen;
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} ParsedWord;
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typedef struct
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{
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ParsedWord *words;
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int4 lenwords;
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int4 curwords;
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int4 pos;
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} ParsedText;
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extern void parsetext(Oid cfgId, ParsedText *prs, char *buf, int4 buflen);
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/*
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* headline framework, flow in common to generate:
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* 1 parse text with hlparsetext
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* 2 parser-specific function to find part
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* 3 generateHeadline to generate result text
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*/
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extern void hlparsetext(Oid cfgId, HeadlineParsedText *prs, TSQuery query,
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char *buf, int4 buflen);
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extern text *generateHeadline(HeadlineParsedText *prs);
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/*
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* Common check function for tsvector @@ tsquery
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*/
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extern bool TS_execute(QueryItem *curitem, void *checkval, bool calcnot,
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bool (*chkcond) (void *checkval, QueryOperand *val));
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extern bool tsquery_requires_match(QueryItem *curitem);
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/*
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* to_ts* - text transformation to tsvector, tsquery
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*/
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extern TSVector make_tsvector(ParsedText *prs);
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extern int32 tsCompareString(char *a, int lena, char *b, int lenb, bool prefix);
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extern Datum to_tsvector_byid(PG_FUNCTION_ARGS);
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extern Datum to_tsvector(PG_FUNCTION_ARGS);
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extern Datum to_tsquery_byid(PG_FUNCTION_ARGS);
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extern Datum to_tsquery(PG_FUNCTION_ARGS);
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extern Datum plainto_tsquery_byid(PG_FUNCTION_ARGS);
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extern Datum plainto_tsquery(PG_FUNCTION_ARGS);
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/*
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* GiST support function
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*/
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extern Datum gtsvector_compress(PG_FUNCTION_ARGS);
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extern Datum gtsvector_decompress(PG_FUNCTION_ARGS);
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extern Datum gtsvector_consistent(PG_FUNCTION_ARGS);
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extern Datum gtsvector_union(PG_FUNCTION_ARGS);
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extern Datum gtsvector_same(PG_FUNCTION_ARGS);
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extern Datum gtsvector_penalty(PG_FUNCTION_ARGS);
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extern Datum gtsvector_picksplit(PG_FUNCTION_ARGS);
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/*
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* IO functions for pseudotype gtsvector
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* used internally in tsvector GiST opclass
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*/
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extern Datum gtsvectorin(PG_FUNCTION_ARGS);
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extern Datum gtsvectorout(PG_FUNCTION_ARGS);
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/*
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* GIN support function
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*/
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extern Datum gin_extract_tsvector(PG_FUNCTION_ARGS);
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extern Datum gin_cmp_tslexeme(PG_FUNCTION_ARGS);
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extern Datum gin_cmp_prefix(PG_FUNCTION_ARGS);
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extern Datum gin_extract_tsquery(PG_FUNCTION_ARGS);
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extern Datum gin_tsquery_consistent(PG_FUNCTION_ARGS);
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extern Datum gin_extract_tsvector_2args(PG_FUNCTION_ARGS);
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extern Datum gin_extract_tsquery_5args(PG_FUNCTION_ARGS);
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extern Datum gin_tsquery_consistent_6args(PG_FUNCTION_ARGS);
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/*
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* Possible strategy numbers for indexes
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* TSearchStrategyNumber - (tsvector|text) @@ tsquery
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* TSearchWithClassStrategyNumber - tsvector @@@ tsquery
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*/
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#define TSearchStrategyNumber 1
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#define TSearchWithClassStrategyNumber 2
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/*
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* TSQuery Utilities
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*/
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extern QueryItem *clean_NOT(QueryItem *ptr, int4 *len);
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extern QueryItem *clean_fakeval(QueryItem *ptr, int4 *len);
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typedef struct QTNode
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{
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QueryItem *valnode;
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uint32 flags;
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int4 nchild;
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char *word;
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uint32 sign;
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struct QTNode **child;
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} QTNode;
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/* bits in QTNode.flags */
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#define QTN_NEEDFREE 0x01
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#define QTN_NOCHANGE 0x02
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#define QTN_WORDFREE 0x04
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typedef uint64 TSQuerySign;
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#define TSQS_SIGLEN (sizeof(TSQuerySign)*BITS_PER_BYTE)
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#define TSQuerySignGetDatum(X) Int64GetDatum((int64) (X))
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#define DatumGetTSQuerySign(X) ((TSQuerySign) DatumGetInt64(X))
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#define PG_RETURN_TSQUERYSIGN(X) return TSQuerySignGetDatum(X)
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#define PG_GETARG_TSQUERYSIGN(n) DatumGetTSQuerySign(PG_GETARG_DATUM(n))
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extern QTNode *QT2QTN(QueryItem *in, char *operand);
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extern TSQuery QTN2QT(QTNode *in);
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extern void QTNFree(QTNode *in);
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extern void QTNSort(QTNode *in);
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extern void QTNTernary(QTNode *in);
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extern void QTNBinary(QTNode *in);
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extern int QTNodeCompare(QTNode *an, QTNode *bn);
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extern QTNode *QTNCopy(QTNode *in);
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extern void QTNClearFlags(QTNode *in, uint32 flags);
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extern bool QTNEq(QTNode *a, QTNode *b);
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extern TSQuerySign makeTSQuerySign(TSQuery a);
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extern QTNode *findsubquery(QTNode *root, QTNode *ex, QTNode *subs,
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bool *isfind);
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/*
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* TSQuery GiST support
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*/
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extern Datum gtsquery_compress(PG_FUNCTION_ARGS);
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extern Datum gtsquery_decompress(PG_FUNCTION_ARGS);
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extern Datum gtsquery_consistent(PG_FUNCTION_ARGS);
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extern Datum gtsquery_union(PG_FUNCTION_ARGS);
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extern Datum gtsquery_same(PG_FUNCTION_ARGS);
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extern Datum gtsquery_penalty(PG_FUNCTION_ARGS);
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extern Datum gtsquery_picksplit(PG_FUNCTION_ARGS);
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/*
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* Parser interface to SQL
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*/
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extern Datum ts_token_type_byid(PG_FUNCTION_ARGS);
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extern Datum ts_token_type_byname(PG_FUNCTION_ARGS);
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extern Datum ts_parse_byid(PG_FUNCTION_ARGS);
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extern Datum ts_parse_byname(PG_FUNCTION_ARGS);
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/*
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* Default word parser
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*/
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extern Datum prsd_start(PG_FUNCTION_ARGS);
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extern Datum prsd_nexttoken(PG_FUNCTION_ARGS);
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extern Datum prsd_end(PG_FUNCTION_ARGS);
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extern Datum prsd_headline(PG_FUNCTION_ARGS);
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extern Datum prsd_lextype(PG_FUNCTION_ARGS);
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/*
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* Dictionary interface to SQL
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*/
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extern Datum ts_lexize(PG_FUNCTION_ARGS);
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/*
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* Simple built-in dictionary
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*/
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extern Datum dsimple_init(PG_FUNCTION_ARGS);
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extern Datum dsimple_lexize(PG_FUNCTION_ARGS);
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/*
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* Synonym built-in dictionary
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*/
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extern Datum dsynonym_init(PG_FUNCTION_ARGS);
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extern Datum dsynonym_lexize(PG_FUNCTION_ARGS);
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/*
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* ISpell dictionary
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*/
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extern Datum dispell_init(PG_FUNCTION_ARGS);
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extern Datum dispell_lexize(PG_FUNCTION_ARGS);
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/*
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* Thesaurus
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*/
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extern Datum thesaurus_init(PG_FUNCTION_ARGS);
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extern Datum thesaurus_lexize(PG_FUNCTION_ARGS);
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/*
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* headline
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*/
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extern Datum ts_headline_byid_opt(PG_FUNCTION_ARGS);
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extern Datum ts_headline_byid(PG_FUNCTION_ARGS);
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extern Datum ts_headline(PG_FUNCTION_ARGS);
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extern Datum ts_headline_opt(PG_FUNCTION_ARGS);
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/*
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* current cfg
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*/
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extern Datum get_current_ts_config(PG_FUNCTION_ARGS);
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#endif /* _PG_TS_UTILS_H_ */
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