mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-08-31 11:17:21 +02:00
350 lines
7.3 KiB
C
350 lines
7.3 KiB
C
/* $PostgreSQL: pgsql/contrib/tsearch2/dict.c,v 1.13 2006/10/04 00:29:46 momjian Exp $ */
|
|
|
|
/*
|
|
* interface functions to dictionary
|
|
* Teodor Sigaev <teodor@sigaev.ru>
|
|
*/
|
|
#include "postgres.h"
|
|
|
|
#include <ctype.h>
|
|
|
|
#include "catalog/pg_type.h"
|
|
#include "executor/spi.h"
|
|
#include "fmgr.h"
|
|
#include "utils/array.h"
|
|
#include "utils/memutils.h"
|
|
|
|
#include "dict.h"
|
|
#include "common.h"
|
|
#include "snmap.h"
|
|
|
|
/*********top interface**********/
|
|
|
|
void
|
|
init_dict(Oid id, DictInfo * dict)
|
|
{
|
|
Oid arg[1];
|
|
bool isnull;
|
|
Datum pars[1];
|
|
int stat;
|
|
void *plan;
|
|
char buf[1024];
|
|
char *nsp = get_namespace(TSNSP_FunctionOid);
|
|
|
|
arg[0] = OIDOID;
|
|
pars[0] = ObjectIdGetDatum(id);
|
|
|
|
memset(dict, 0, sizeof(DictInfo));
|
|
SPI_connect();
|
|
sprintf(buf, "select dict_init, dict_initoption, dict_lexize from %s.pg_ts_dict where oid = $1", nsp);
|
|
pfree(nsp);
|
|
plan = SPI_prepare(buf, 1, arg);
|
|
if (!plan)
|
|
ts_error(ERROR, "SPI_prepare() failed");
|
|
|
|
stat = SPI_execp(plan, pars, " ", 1);
|
|
if (stat < 0)
|
|
ts_error(ERROR, "SPI_execp return %d", stat);
|
|
if (SPI_processed > 0)
|
|
{
|
|
Datum opt;
|
|
Oid oid = InvalidOid;
|
|
|
|
/* setup dictlexize method */
|
|
oid = DatumGetObjectId(SPI_getbinval(SPI_tuptable->vals[0], SPI_tuptable->tupdesc, 3, &isnull));
|
|
if (isnull || oid == InvalidOid)
|
|
ts_error(ERROR, "Null dict_lexize for dictonary %d", id);
|
|
fmgr_info_cxt(oid, &(dict->lexize_info), TopMemoryContext);
|
|
|
|
/* setup and call dictinit method, optinally */
|
|
oid = DatumGetObjectId(SPI_getbinval(SPI_tuptable->vals[0], SPI_tuptable->tupdesc, 1, &isnull));
|
|
if (!(isnull || oid == InvalidOid))
|
|
{
|
|
opt = SPI_getbinval(SPI_tuptable->vals[0], SPI_tuptable->tupdesc, 2, &isnull);
|
|
dict->dictionary = (void *) DatumGetPointer(OidFunctionCall1(oid, opt));
|
|
}
|
|
dict->dict_id = id;
|
|
}
|
|
else
|
|
ts_error(ERROR, "No dictionary with id %d", id);
|
|
SPI_freeplan(plan);
|
|
SPI_finish();
|
|
}
|
|
|
|
typedef struct
|
|
{
|
|
DictInfo *last_dict;
|
|
int len;
|
|
int reallen;
|
|
DictInfo *list;
|
|
SNMap name2id_map;
|
|
} DictList;
|
|
|
|
static DictList DList = {NULL, 0, 0, NULL, {0, 0, NULL}};
|
|
|
|
void
|
|
reset_dict(void)
|
|
{
|
|
freeSNMap(&(DList.name2id_map));
|
|
/* XXX need to free DList.list[*].dictionary */
|
|
if (DList.list)
|
|
free(DList.list);
|
|
memset(&DList, 0, sizeof(DictList));
|
|
}
|
|
|
|
|
|
static int
|
|
comparedict(const void *a, const void *b)
|
|
{
|
|
if (((DictInfo *) a)->dict_id == ((DictInfo *) b)->dict_id)
|
|
return 0;
|
|
return (((DictInfo *) a)->dict_id < ((DictInfo *) b)->dict_id) ? -1 : 1;
|
|
}
|
|
|
|
static void
|
|
insertdict(Oid id)
|
|
{
|
|
DictInfo newdict;
|
|
|
|
if (DList.len == DList.reallen)
|
|
{
|
|
DictInfo *tmp;
|
|
int reallen = (DList.reallen) ? 2 * DList.reallen : 16;
|
|
|
|
tmp = (DictInfo *) realloc(DList.list, sizeof(DictInfo) * reallen);
|
|
if (!tmp)
|
|
ts_error(ERROR, "No memory");
|
|
DList.reallen = reallen;
|
|
DList.list = tmp;
|
|
}
|
|
init_dict(id, &newdict);
|
|
|
|
DList.list[DList.len] = newdict;
|
|
DList.len++;
|
|
|
|
qsort(DList.list, DList.len, sizeof(DictInfo), comparedict);
|
|
}
|
|
|
|
DictInfo *
|
|
finddict(Oid id)
|
|
{
|
|
/* last used dict */
|
|
if (DList.last_dict && DList.last_dict->dict_id == id)
|
|
return DList.last_dict;
|
|
|
|
|
|
/* already used dict */
|
|
if (DList.len != 0)
|
|
{
|
|
DictInfo key;
|
|
|
|
key.dict_id = id;
|
|
DList.last_dict = bsearch(&key, DList.list, DList.len, sizeof(DictInfo), comparedict);
|
|
if (DList.last_dict != NULL)
|
|
return DList.last_dict;
|
|
}
|
|
|
|
/* insert new dictionary */
|
|
insertdict(id);
|
|
return finddict(id); /* qsort changed order!! */ ;
|
|
}
|
|
|
|
Oid
|
|
name2id_dict(text *name)
|
|
{
|
|
Oid arg[1];
|
|
bool isnull;
|
|
Datum pars[1];
|
|
int stat;
|
|
Oid id = findSNMap_t(&(DList.name2id_map), name);
|
|
void *plan;
|
|
char buf[1024],
|
|
*nsp;
|
|
|
|
arg[0] = TEXTOID;
|
|
pars[0] = PointerGetDatum(name);
|
|
|
|
if (id)
|
|
return id;
|
|
|
|
nsp = get_namespace(TSNSP_FunctionOid);
|
|
SPI_connect();
|
|
sprintf(buf, "select oid from %s.pg_ts_dict where dict_name = $1", nsp);
|
|
pfree(nsp);
|
|
plan = SPI_prepare(buf, 1, arg);
|
|
if (!plan)
|
|
ts_error(ERROR, "SPI_prepare() failed");
|
|
|
|
stat = SPI_execp(plan, pars, " ", 1);
|
|
if (stat < 0)
|
|
ts_error(ERROR, "SPI_execp return %d", stat);
|
|
if (SPI_processed > 0)
|
|
id = DatumGetObjectId(SPI_getbinval(SPI_tuptable->vals[0], SPI_tuptable->tupdesc, 1, &isnull));
|
|
else
|
|
ts_error(ERROR, "No dictionary with name '%s'", text2char(name));
|
|
SPI_freeplan(plan);
|
|
SPI_finish();
|
|
addSNMap_t(&(DList.name2id_map), name, id);
|
|
return id;
|
|
}
|
|
|
|
|
|
/******sql-level interface******/
|
|
PG_FUNCTION_INFO_V1(lexize);
|
|
Datum lexize(PG_FUNCTION_ARGS);
|
|
|
|
Datum
|
|
lexize(PG_FUNCTION_ARGS)
|
|
{
|
|
text *in = PG_GETARG_TEXT_P(1);
|
|
DictInfo *dict;
|
|
TSLexeme *res,
|
|
*ptr;
|
|
Datum *da;
|
|
ArrayType *a;
|
|
DictSubState dstate = {false, false, NULL};
|
|
|
|
SET_FUNCOID();
|
|
dict = finddict(PG_GETARG_OID(0));
|
|
|
|
ptr = res = (TSLexeme *) DatumGetPointer(
|
|
FunctionCall4(&(dict->lexize_info),
|
|
PointerGetDatum(dict->dictionary),
|
|
PointerGetDatum(VARDATA(in)),
|
|
Int32GetDatum(VARSIZE(in) - VARHDRSZ),
|
|
PointerGetDatum(&dstate)
|
|
)
|
|
);
|
|
|
|
if (dstate.getnext)
|
|
{
|
|
dstate.isend = true;
|
|
ptr = res = (TSLexeme *) DatumGetPointer(
|
|
FunctionCall4(&(dict->lexize_info),
|
|
PointerGetDatum(dict->dictionary),
|
|
PointerGetDatum(VARDATA(in)),
|
|
Int32GetDatum(VARSIZE(in) - VARHDRSZ),
|
|
PointerGetDatum(&dstate)
|
|
)
|
|
);
|
|
}
|
|
|
|
PG_FREE_IF_COPY(in, 1);
|
|
if (!res)
|
|
{
|
|
if (PG_NARGS() > 2)
|
|
PG_RETURN_POINTER(NULL);
|
|
else
|
|
PG_RETURN_NULL();
|
|
}
|
|
|
|
while (ptr->lexeme)
|
|
ptr++;
|
|
da = (Datum *) palloc(sizeof(Datum) * (ptr - res + 1));
|
|
ptr = res;
|
|
while (ptr->lexeme)
|
|
{
|
|
da[ptr - res] = PointerGetDatum(char2text(ptr->lexeme));
|
|
ptr++;
|
|
}
|
|
|
|
a = construct_array(
|
|
da,
|
|
ptr - res,
|
|
TEXTOID,
|
|
-1,
|
|
false,
|
|
'i'
|
|
);
|
|
|
|
ptr = res;
|
|
while (ptr->lexeme)
|
|
{
|
|
pfree(DatumGetPointer(da[ptr - res]));
|
|
pfree(ptr->lexeme);
|
|
ptr++;
|
|
}
|
|
pfree(res);
|
|
pfree(da);
|
|
|
|
PG_RETURN_POINTER(a);
|
|
}
|
|
|
|
PG_FUNCTION_INFO_V1(lexize_byname);
|
|
Datum lexize_byname(PG_FUNCTION_ARGS);
|
|
Datum
|
|
lexize_byname(PG_FUNCTION_ARGS)
|
|
{
|
|
text *dictname = PG_GETARG_TEXT_P(0);
|
|
Datum res;
|
|
|
|
SET_FUNCOID();
|
|
|
|
res = DirectFunctionCall3(
|
|
lexize,
|
|
ObjectIdGetDatum(name2id_dict(dictname)),
|
|
PG_GETARG_DATUM(1),
|
|
(Datum) 0
|
|
);
|
|
PG_FREE_IF_COPY(dictname, 0);
|
|
if (res)
|
|
PG_RETURN_DATUM(res);
|
|
else
|
|
PG_RETURN_NULL();
|
|
}
|
|
|
|
static Oid currect_dictionary_id = 0;
|
|
|
|
PG_FUNCTION_INFO_V1(set_curdict);
|
|
Datum set_curdict(PG_FUNCTION_ARGS);
|
|
Datum
|
|
set_curdict(PG_FUNCTION_ARGS)
|
|
{
|
|
SET_FUNCOID();
|
|
finddict(PG_GETARG_OID(0));
|
|
currect_dictionary_id = PG_GETARG_OID(0);
|
|
PG_RETURN_VOID();
|
|
}
|
|
|
|
PG_FUNCTION_INFO_V1(set_curdict_byname);
|
|
Datum set_curdict_byname(PG_FUNCTION_ARGS);
|
|
Datum
|
|
set_curdict_byname(PG_FUNCTION_ARGS)
|
|
{
|
|
text *dictname = PG_GETARG_TEXT_P(0);
|
|
|
|
SET_FUNCOID();
|
|
DirectFunctionCall1(
|
|
set_curdict,
|
|
ObjectIdGetDatum(name2id_dict(dictname))
|
|
);
|
|
PG_FREE_IF_COPY(dictname, 0);
|
|
PG_RETURN_VOID();
|
|
}
|
|
|
|
PG_FUNCTION_INFO_V1(lexize_bycurrent);
|
|
Datum lexize_bycurrent(PG_FUNCTION_ARGS);
|
|
Datum
|
|
lexize_bycurrent(PG_FUNCTION_ARGS)
|
|
{
|
|
Datum res;
|
|
|
|
SET_FUNCOID();
|
|
if (currect_dictionary_id == 0)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
|
|
errmsg("no currect dictionary"),
|
|
errhint("Execute select set_curdict().")));
|
|
|
|
res = DirectFunctionCall3(
|
|
lexize,
|
|
ObjectIdGetDatum(currect_dictionary_id),
|
|
PG_GETARG_DATUM(0),
|
|
(Datum) 0
|
|
);
|
|
if (res)
|
|
PG_RETURN_DATUM(res);
|
|
else
|
|
PG_RETURN_NULL();
|
|
}
|