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Add websearch_to_tsquery

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Error-tolerant conversion function with web-like syntax for search query,
it simplifies  constraining search engine with close to habitual interface for
users.

Bump catalog version

Authors: Victor Drobny, Dmitry Ivanov with editorization by me
Reviewed by: Aleksander Alekseev, Tomas Vondra, Thomas Munro, Aleksandr Parfenov
Discussion: https://www.postgresql.org/message-id/flat/fe931111ff7e9ad79196486ada79e268@postgrespro.ru
This commit is contained in:
Teodor Sigaev
2018-04-05 19:55:11 +03:00
parent fbc27330b8
commit 1664ae1978
11 changed files with 1002 additions and 121 deletions
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26
src/include/tsearch/ts_utils.h
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@ -25,9 +25,11 @@
struct TSVectorParseStateData; /* opaque struct in tsvector_parser.c */
typedef struct TSVectorParseStateData *TSVectorParseState;
extern TSVectorParseState init_tsvector_parser(char *input,
bool oprisdelim,
bool is_tsquery);
#define P_TSV_OPR_IS_DELIM (1 << 0)
#define P_TSV_IS_TSQUERY (1 << 1)
#define P_TSV_IS_WEB (1 << 2)
extern TSVectorParseState init_tsvector_parser(char *input, int flags);
extern void reset_tsvector_parser(TSVectorParseState state, char *input);
extern bool gettoken_tsvector(TSVectorParseState state,
char **token, int *len,
@ -35,6 +37,16 @@ extern bool gettoken_tsvector(TSVectorParseState state,
char **endptr);
extern void close_tsvector_parser(TSVectorParseState state);
/* phrase operator begins with '<' */
#define ISOPERATOR(x) \
( pg_mblen(x) == 1 && ( *(x) == '!' || \
*(x) == '&' || \
*(x) == '|' || \
*(x) == '(' || \
*(x) == ')' || \
*(x) == '<' \
) )
/* parse_tsquery */
struct TSQueryParserStateData; /* private in backend/utils/adt/tsquery.c */
@ -46,9 +58,13 @@ typedef void (*PushFunction) (Datum opaque, TSQueryParserState state,
* QueryOperand struct */
bool prefix);
#define P_TSQ_PLAIN (1 << 0)
#define P_TSQ_WEB (1 << 1)
extern TSQuery parse_tsquery(char *buf,
PushFunction pushval,
Datum opaque, bool isplain);
PushFunction pushval,
Datum opaque,
int flags);
/* Functions for use by PushFunction implementations */
extern void pushValue(TSQueryParserState state,