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postgresql/contrib/tsearch2/tsearch2.c
Tom Lane 1609797c25 Clean up the #include mess a little. 
walsender.h should depend on xlog.h, not vice versa.  (Actually, the
inclusion was circular until a couple hours ago, which was even sillier;
but Bruce broke it in the expedient rather than logically correct
direction.)  Because of that poor decision, plus blind application of
pgrminclude, we had a situation where half the system was depending on
xlog.h to include such unrelated stuff as array.h and guc.h.  Clean up
the header inclusion, and manually revert a lot of what pgrminclude had
done so things build again.

This episode reinforces my feeling that pgrminclude should not be run
without adult supervision.  Inclusion changes in header files in particular
need to be reviewed with great care.  More generally, it'd be good if we
had a clearer notion of module layering to dictate which headers can sanely
include which others ... but that's a big task for another day.
2011-09-04 01:13:16 -04:00

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/*-------------------------------------------------------------------------
*
* tsearch2.c
* Backwards-compatibility package for old contrib/tsearch2 API
*
* Portions Copyright (c) 1996-2011, PostgreSQL Global Development Group
*
*
* IDENTIFICATION
* contrib/tsearch2/tsearch2.c
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "catalog/namespace.h"
#include "catalog/pg_type.h"
#include "commands/trigger.h"
#include "tsearch/ts_utils.h"
#include "utils/builtins.h"
#include "utils/guc.h"
#include "utils/syscache.h"
PG_MODULE_MAGIC;
static Oid current_dictionary_oid = InvalidOid;
static Oid current_parser_oid = InvalidOid;
/* insert given value at argument position 0 */
#define INSERT_ARGUMENT0(argument, isnull) \
do { \
int i; \
for (i = fcinfo->nargs; i > 0; i--) \
{ \
fcinfo->arg[i] = fcinfo->arg[i-1]; \
fcinfo->argnull[i] = fcinfo->argnull[i-1]; \
} \
fcinfo->arg[0] = (argument); \
fcinfo->argnull[0] = (isnull); \
fcinfo->nargs++; \
} while (0)
#define TextGetObjectId(infunction, text) \
DatumGetObjectId(DirectFunctionCall1(infunction, \
CStringGetDatum(text_to_cstring(text))))
#define UNSUPPORTED_FUNCTION(name) \
Datum name(PG_FUNCTION_ARGS); \
Datum \
name(PG_FUNCTION_ARGS) \
{ \
ereport(ERROR, \
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),\
errmsg("function %s is no longer supported", \
format_procedure(fcinfo->flinfo->fn_oid)), \
errhint("Switch to new tsearch functionality."))); \
/* keep compiler quiet */ \
PG_RETURN_NULL(); \
} \
PG_FUNCTION_INFO_V1(name)
static Oid GetCurrentDict(void);
static Oid GetCurrentParser(void);
Datum tsa_lexize_byname(PG_FUNCTION_ARGS);
Datum tsa_lexize_bycurrent(PG_FUNCTION_ARGS);
Datum tsa_set_curdict(PG_FUNCTION_ARGS);
Datum tsa_set_curdict_byname(PG_FUNCTION_ARGS);
Datum tsa_token_type_current(PG_FUNCTION_ARGS);
Datum tsa_set_curprs(PG_FUNCTION_ARGS);
Datum tsa_set_curprs_byname(PG_FUNCTION_ARGS);
Datum tsa_parse_current(PG_FUNCTION_ARGS);
Datum tsa_set_curcfg(PG_FUNCTION_ARGS);
Datum tsa_set_curcfg_byname(PG_FUNCTION_ARGS);
Datum tsa_to_tsvector_name(PG_FUNCTION_ARGS);
Datum tsa_to_tsquery_name(PG_FUNCTION_ARGS);
Datum tsa_plainto_tsquery_name(PG_FUNCTION_ARGS);
Datum tsa_headline_byname(PG_FUNCTION_ARGS);
Datum tsa_ts_stat(PG_FUNCTION_ARGS);
Datum tsa_tsearch2(PG_FUNCTION_ARGS);
Datum tsa_rewrite_accum(PG_FUNCTION_ARGS);
Datum tsa_rewrite_finish(PG_FUNCTION_ARGS);
PG_FUNCTION_INFO_V1(tsa_lexize_byname);
PG_FUNCTION_INFO_V1(tsa_lexize_bycurrent);
PG_FUNCTION_INFO_V1(tsa_set_curdict);
PG_FUNCTION_INFO_V1(tsa_set_curdict_byname);
PG_FUNCTION_INFO_V1(tsa_token_type_current);
PG_FUNCTION_INFO_V1(tsa_set_curprs);
PG_FUNCTION_INFO_V1(tsa_set_curprs_byname);
PG_FUNCTION_INFO_V1(tsa_parse_current);
PG_FUNCTION_INFO_V1(tsa_set_curcfg);
PG_FUNCTION_INFO_V1(tsa_set_curcfg_byname);
PG_FUNCTION_INFO_V1(tsa_to_tsvector_name);
PG_FUNCTION_INFO_V1(tsa_to_tsquery_name);
PG_FUNCTION_INFO_V1(tsa_plainto_tsquery_name);
PG_FUNCTION_INFO_V1(tsa_headline_byname);
PG_FUNCTION_INFO_V1(tsa_ts_stat);
PG_FUNCTION_INFO_V1(tsa_tsearch2);
PG_FUNCTION_INFO_V1(tsa_rewrite_accum);
PG_FUNCTION_INFO_V1(tsa_rewrite_finish);
/*
* List of unsupported functions
*
* The parser and dictionary functions are defined only so that the former
* contents of pg_ts_parser and pg_ts_dict can be loaded into the system,
* for ease of reference while creating the new tsearch configuration.
*/
UNSUPPORTED_FUNCTION(tsa_dex_init);
UNSUPPORTED_FUNCTION(tsa_dex_lexize);
UNSUPPORTED_FUNCTION(tsa_snb_en_init);
UNSUPPORTED_FUNCTION(tsa_snb_lexize);
UNSUPPORTED_FUNCTION(tsa_snb_ru_init_koi8);
UNSUPPORTED_FUNCTION(tsa_snb_ru_init_utf8);
UNSUPPORTED_FUNCTION(tsa_snb_ru_init);
UNSUPPORTED_FUNCTION(tsa_spell_init);
UNSUPPORTED_FUNCTION(tsa_spell_lexize);
UNSUPPORTED_FUNCTION(tsa_syn_init);
UNSUPPORTED_FUNCTION(tsa_syn_lexize);
UNSUPPORTED_FUNCTION(tsa_thesaurus_init);
UNSUPPORTED_FUNCTION(tsa_thesaurus_lexize);
UNSUPPORTED_FUNCTION(tsa_prsd_start);
UNSUPPORTED_FUNCTION(tsa_prsd_getlexeme);
UNSUPPORTED_FUNCTION(tsa_prsd_end);
UNSUPPORTED_FUNCTION(tsa_prsd_lextype);
UNSUPPORTED_FUNCTION(tsa_prsd_headline);
UNSUPPORTED_FUNCTION(tsa_reset_tsearch);
UNSUPPORTED_FUNCTION(tsa_get_covers);
/*
* list of redefined functions
*/
/* lexize(text, text) */
Datum
tsa_lexize_byname(PG_FUNCTION_ARGS)
{
text *dictname = PG_GETARG_TEXT_PP(0);
Datum arg1 = PG_GETARG_DATUM(1);
return DirectFunctionCall2(ts_lexize,
ObjectIdGetDatum(TextGetObjectId(regdictionaryin, dictname)),
arg1);
}
/* lexize(text) */
Datum
tsa_lexize_bycurrent(PG_FUNCTION_ARGS)
{
Datum arg0 = PG_GETARG_DATUM(0);
Oid id = GetCurrentDict();
return DirectFunctionCall2(ts_lexize,
ObjectIdGetDatum(id),
arg0);
}
/* set_curdict(int) */
Datum
tsa_set_curdict(PG_FUNCTION_ARGS)
{
Oid dict_oid = PG_GETARG_OID(0);
if (!SearchSysCacheExists(TSDICTOID,
ObjectIdGetDatum(dict_oid),
0, 0, 0))
elog(ERROR, "cache lookup failed for text search dictionary %u",
dict_oid);
current_dictionary_oid = dict_oid;
PG_RETURN_VOID();
}
/* set_curdict(text) */
Datum
tsa_set_curdict_byname(PG_FUNCTION_ARGS)
{
text *name = PG_GETARG_TEXT_PP(0);
Oid dict_oid;
dict_oid = get_ts_dict_oid(stringToQualifiedNameList(text_to_cstring(name)), false);
current_dictionary_oid = dict_oid;
PG_RETURN_VOID();
}
/* token_type() */
Datum
tsa_token_type_current(PG_FUNCTION_ARGS)
{
INSERT_ARGUMENT0(ObjectIdGetDatum(GetCurrentParser()), false);
return ts_token_type_byid(fcinfo);
}
/* set_curprs(int) */
Datum
tsa_set_curprs(PG_FUNCTION_ARGS)
{
Oid parser_oid = PG_GETARG_OID(0);
if (!SearchSysCacheExists(TSPARSEROID,
ObjectIdGetDatum(parser_oid),
0, 0, 0))
elog(ERROR, "cache lookup failed for text search parser %u",
parser_oid);
current_parser_oid = parser_oid;
PG_RETURN_VOID();
}
/* set_curprs(text) */
Datum
tsa_set_curprs_byname(PG_FUNCTION_ARGS)
{
text *name = PG_GETARG_TEXT_PP(0);
Oid parser_oid;
parser_oid = get_ts_parser_oid(stringToQualifiedNameList(text_to_cstring(name)), false);
current_parser_oid = parser_oid;
PG_RETURN_VOID();
}
/* parse(text) */
Datum
tsa_parse_current(PG_FUNCTION_ARGS)
{
INSERT_ARGUMENT0(ObjectIdGetDatum(GetCurrentParser()), false);
return ts_parse_byid(fcinfo);
}
/* set_curcfg(int) */
Datum
tsa_set_curcfg(PG_FUNCTION_ARGS)
{
Oid arg0 = PG_GETARG_OID(0);
char *name;
name = DatumGetCString(DirectFunctionCall1(regconfigout,
ObjectIdGetDatum(arg0)));
set_config_option("default_text_search_config", name,
PGC_USERSET,
PGC_S_SESSION,
GUC_ACTION_SET,
true);
PG_RETURN_VOID();
}
/* set_curcfg(text) */
Datum
tsa_set_curcfg_byname(PG_FUNCTION_ARGS)
{
text *arg0 = PG_GETARG_TEXT_PP(0);
char *name;
name = text_to_cstring(arg0);
set_config_option("default_text_search_config", name,
PGC_USERSET,
PGC_S_SESSION,
GUC_ACTION_SET,
true);
PG_RETURN_VOID();
}
/* to_tsvector(text, text) */
Datum
tsa_to_tsvector_name(PG_FUNCTION_ARGS)
{
text *cfgname = PG_GETARG_TEXT_PP(0);
Datum arg1 = PG_GETARG_DATUM(1);
Oid config_oid;
config_oid = TextGetObjectId(regconfigin, cfgname);
return DirectFunctionCall2(to_tsvector_byid,
ObjectIdGetDatum(config_oid), arg1);
}
/* to_tsquery(text, text) */
Datum
tsa_to_tsquery_name(PG_FUNCTION_ARGS)
{
text *cfgname = PG_GETARG_TEXT_PP(0);
Datum arg1 = PG_GETARG_DATUM(1);
Oid config_oid;
config_oid = TextGetObjectId(regconfigin, cfgname);
return DirectFunctionCall2(to_tsquery_byid,
ObjectIdGetDatum(config_oid), arg1);
}
/* plainto_tsquery(text, text) */
Datum
tsa_plainto_tsquery_name(PG_FUNCTION_ARGS)
{
text *cfgname = PG_GETARG_TEXT_PP(0);
Datum arg1 = PG_GETARG_DATUM(1);
Oid config_oid;
config_oid = TextGetObjectId(regconfigin, cfgname);
return DirectFunctionCall2(plainto_tsquery_byid,
ObjectIdGetDatum(config_oid), arg1);
}
/* headline(text, text, tsquery [,text]) */
Datum
tsa_headline_byname(PG_FUNCTION_ARGS)
{
Datum arg0 = PG_GETARG_DATUM(0);
Datum arg1 = PG_GETARG_DATUM(1);
Datum arg2 = PG_GETARG_DATUM(2);
Datum result;
Oid config_oid;
/* first parameter has to be converted to oid */
config_oid = DatumGetObjectId(DirectFunctionCall1(regconfigin,
CStringGetDatum(TextDatumGetCString(arg0))));
if (PG_NARGS() == 3)
result = DirectFunctionCall3(ts_headline_byid,
ObjectIdGetDatum(config_oid), arg1, arg2);
else
{
Datum arg3 = PG_GETARG_DATUM(3);
result = DirectFunctionCall4(ts_headline_byid_opt,
ObjectIdGetDatum(config_oid),
arg1, arg2, arg3);
}
return result;
}
/*
* tsearch2 version of update trigger
*
* We pass this on to the core trigger after inserting the default text
* search configuration name as the second argument. Note that this isn't
* a complete implementation of the original functionality; tsearch2 allowed
* transformation function names to be included in the list. However, that
* is deliberately removed as being a security risk.
*/
Datum
tsa_tsearch2(PG_FUNCTION_ARGS)
{
TriggerData *trigdata;
Trigger *trigger;
char **tgargs,
**tgargs_old;
int i;
Datum res;
/* Check call context */
if (!CALLED_AS_TRIGGER(fcinfo)) /* internal error */
elog(ERROR, "tsvector_update_trigger: not fired by trigger manager");
trigdata = (TriggerData *) fcinfo->context;
trigger = trigdata->tg_trigger;
if (trigger->tgnargs < 2)
elog(ERROR, "TSearch: format tsearch2(tsvector_field, text_field1,...)");
/* create space for configuration name */
tgargs = (char **) palloc((trigger->tgnargs + 1) * sizeof(char *));
tgargs[0] = trigger->tgargs[0];
for (i = 1; i < trigger->tgnargs; i++)
tgargs[i + 1] = trigger->tgargs[i];
tgargs[1] = pstrdup(GetConfigOptionByName("default_text_search_config",
NULL));
tgargs_old = trigger->tgargs;
trigger->tgargs = tgargs;
trigger->tgnargs++;
res = tsvector_update_trigger_byid(fcinfo);
/* restore old trigger data */
trigger->tgargs = tgargs_old;
trigger->tgnargs--;
pfree(tgargs[1]);
pfree(tgargs);
return res;
}
Datum
tsa_rewrite_accum(PG_FUNCTION_ARGS)
{
TSQuery acc;
ArrayType *qa;
TSQuery q;
QTNode *qex = NULL,
*subs = NULL,
*acctree = NULL;
bool isfind = false;
Datum *elemsp;
int nelemsp;
MemoryContext aggcontext;
MemoryContext oldcontext;
if (!AggCheckCallContext(fcinfo, &aggcontext))
elog(ERROR, "tsa_rewrite_accum called in non-aggregate context");
if (PG_ARGISNULL(0) || PG_GETARG_POINTER(0) == NULL)
{
acc = (TSQuery) MemoryContextAlloc(aggcontext, HDRSIZETQ);
SET_VARSIZE(acc, HDRSIZETQ);
acc->size = 0;
}
else
acc = PG_GETARG_TSQUERY(0);
if (PG_ARGISNULL(1) || PG_GETARG_POINTER(1) == NULL)
PG_RETURN_TSQUERY(acc);
else
qa = PG_GETARG_ARRAYTYPE_P_COPY(1);
if (ARR_NDIM(qa) != 1)
elog(ERROR, "array must be one-dimensional, not %d dimensions",
ARR_NDIM(qa));
if (ArrayGetNItems(ARR_NDIM(qa), ARR_DIMS(qa)) != 3)
elog(ERROR, "array must have three elements");
if (ARR_ELEMTYPE(qa) != TSQUERYOID)
elog(ERROR, "array must contain tsquery elements");
deconstruct_array(qa, TSQUERYOID, -1, false, 'i', &elemsp, NULL, &nelemsp);
q = DatumGetTSQuery(elemsp[0]);
if (q->size == 0)
{
pfree(elemsp);
PG_RETURN_POINTER(acc);
}
if (!acc->size)
{
if (VARSIZE(acc) > HDRSIZETQ)
{
pfree(elemsp);
PG_RETURN_POINTER(acc);
}
else
acctree = QT2QTN(GETQUERY(q), GETOPERAND(q));
}
else
acctree = QT2QTN(GETQUERY(acc), GETOPERAND(acc));
QTNTernary(acctree);
QTNSort(acctree);
q = DatumGetTSQuery(elemsp[1]);
if (q->size == 0)
{
pfree(elemsp);
PG_RETURN_POINTER(acc);
}
qex = QT2QTN(GETQUERY(q), GETOPERAND(q));
QTNTernary(qex);
QTNSort(qex);
q = DatumGetTSQuery(elemsp[2]);
if (q->size)
subs = QT2QTN(GETQUERY(q), GETOPERAND(q));
acctree = findsubquery(acctree, qex, subs, &isfind);
if (isfind || !acc->size)
{
/* pfree( acc ); do not pfree(p), because nodeAgg.c will */
if (acctree)
{
QTNBinary(acctree);
oldcontext = MemoryContextSwitchTo(aggcontext);
acc = QTN2QT(acctree);
MemoryContextSwitchTo(oldcontext);
}
else
{
acc = (TSQuery) MemoryContextAlloc(aggcontext, HDRSIZETQ);
SET_VARSIZE(acc, HDRSIZETQ);
acc->size = 0;
}
}
pfree(elemsp);
QTNFree(qex);
QTNFree(subs);
QTNFree(acctree);
PG_RETURN_TSQUERY(acc);
}
Datum
tsa_rewrite_finish(PG_FUNCTION_ARGS)
{
TSQuery acc = PG_GETARG_TSQUERY(0);
TSQuery rewrited;
if (acc == NULL || PG_ARGISNULL(0) || acc->size == 0)
{
rewrited = (TSQuery) palloc(HDRSIZETQ);
SET_VARSIZE(rewrited, HDRSIZETQ);
rewrited->size = 0;
}
else
{
rewrited = (TSQuery) palloc(VARSIZE(acc));
memcpy(rewrited, acc, VARSIZE(acc));
pfree(acc);
}
PG_RETURN_POINTER(rewrited);
}
/*
* Get Oid of current dictionary
*/
static Oid
GetCurrentDict(void)
{
if (current_dictionary_oid == InvalidOid)
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("no current dictionary"),
errhint("Execute SELECT set_curdict(...).")));
return current_dictionary_oid;
}
/*
* Get Oid of current parser
*
* Here, it seems reasonable to select the "default" parser if none has been
* set.
*/
static Oid
GetCurrentParser(void)
{
if (current_parser_oid == InvalidOid)
current_parser_oid = get_ts_parser_oid(stringToQualifiedNameList("pg_catalog.default"), false);
return current_parser_oid;
}
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