| 1 |
/* |
| 2 |
* integrate Hyper Estraier into PostgreSQL |
| 3 |
* |
| 4 |
* Dobrica Pavlinusic <dpavlin@rot13.org> 2005-05-19 |
| 5 |
* |
| 6 |
* TODO: |
| 7 |
* - all |
| 8 |
* |
| 9 |
* NOTES: |
| 10 |
* - clear structures with memset to support hash indexes (who whould like |
| 11 |
* to create hash index on table returned from function?) |
| 12 |
* - number of returned rows is set by PostgreSQL evaluator, see: |
| 13 |
* http://archives.postgresql.org/pgsql-hackers/2005-02/msg00546.php |
| 14 |
* |
| 15 |
* Based on: |
| 16 |
* - C example from PostgreSQL documentation (BSD licence) |
| 17 |
* - coreexample002.c and nodeexample002.c from Hyper Estraier (GPL) |
| 18 |
* - _textin/_textout from pgcurl.c (LGPL) |
| 19 |
* |
| 20 |
* This code is licenced under GPL |
| 21 |
*/ |
| 22 |
|
| 23 |
#include "postgres.h" |
| 24 |
#include "fmgr.h" |
| 25 |
#include "funcapi.h" |
| 26 |
#include "utils/builtins.h" |
| 27 |
#include "utils/array.h" |
| 28 |
#include "miscadmin.h" |
| 29 |
#include <estraier.h> |
| 30 |
#include <cabin.h> |
| 31 |
#include <estnode.h> |
| 32 |
|
| 33 |
#define _textin(str) DirectFunctionCall1(textin, CStringGetDatum(str)) |
| 34 |
#define _textout(str) DatumGetPointer(DirectFunctionCall1(textout, PointerGetDatum(str))) |
| 35 |
#define GET_STR(textp) DatumGetCString(DirectFunctionCall1(textout, PointerGetDatum(textp))) |
| 36 |
#define GET_TEXT(cstrp) DatumGetTextP(DirectFunctionCall1(textin, CStringGetDatum(cstrp))) |
| 37 |
|
| 38 |
/* SortMem got renamed in PostgreSQL 8.0 */ |
| 39 |
#ifndef SortMem |
| 40 |
#define SortMem 16 * 1024 |
| 41 |
#endif |
| 42 |
|
| 43 |
#define ATTR_DELIMITER "{{!}}" |
| 44 |
|
| 45 |
/* prototype */ |
| 46 |
char *attr2text(ESTDOC *doc, char *attr); |
| 47 |
char *node_attr2text(ESTRESDOC *rdoc, char *attr); |
| 48 |
|
| 49 |
|
| 50 |
/* work in progress */ |
| 51 |
PG_FUNCTION_INFO_V1(pgest_attr); |
| 52 |
Datum pgest_attr(PG_FUNCTION_ARGS) |
| 53 |
{ |
| 54 |
ArrayType *attr_arr = PG_GETARG_ARRAYTYPE_P(6); |
| 55 |
Oid attr_element_type = ARR_ELEMTYPE(attr_arr); |
| 56 |
int attr_ndims = ARR_NDIM(attr_arr); |
| 57 |
int *attr_dim_counts = ARR_DIMS(attr_arr); |
| 58 |
int *attr_dim_lower_bounds = ARR_LBOUND(attr_arr); |
| 59 |
int ncols = 0; |
| 60 |
int nrows = 0; |
| 61 |
int indx[MAXDIM]; |
| 62 |
int16 attr_len; |
| 63 |
bool attr_byval; |
| 64 |
char attr_align; |
| 65 |
ReturnSetInfo *rsinfo = (ReturnSetInfo *) fcinfo->resultinfo; |
| 66 |
AttInMetadata *attinmeta; |
| 67 |
TupleDesc tupdesc; |
| 68 |
Tuplestorestate *tupstore = NULL; |
| 69 |
HeapTuple tuple; |
| 70 |
MemoryContext per_query_ctx; |
| 71 |
MemoryContext oldcontext; |
| 72 |
Datum dvalue; |
| 73 |
char **values; |
| 74 |
int rsinfo_ncols; |
| 75 |
int i, j; |
| 76 |
/* estvars */ |
| 77 |
ESTDB *db; |
| 78 |
ESTCOND *cond; |
| 79 |
ESTDOC *doc; |
| 80 |
const CBLIST *texts; |
| 81 |
int ecode, *est_result, resnum; |
| 82 |
int limit = 0; |
| 83 |
int offset = 0; |
| 84 |
|
| 85 |
char *index_path; |
| 86 |
char *query; |
| 87 |
char *attr; |
| 88 |
char *order; |
| 89 |
|
| 90 |
|
| 91 |
/* only allow 1D input array */ |
| 92 |
if (attr_ndims == 1) |
| 93 |
{ |
| 94 |
ncols = attr_dim_counts[0]; |
| 95 |
} |
| 96 |
else |
| 97 |
ereport(ERROR, |
| 98 |
(errcode(ERRCODE_INVALID_PARAMETER_VALUE), |
| 99 |
errmsg("invalid input array"), |
| 100 |
errdetail("Input array must have 1 dimension"))); |
| 101 |
|
| 102 |
/* check to see if caller supports us returning a tuplestore */ |
| 103 |
if (!rsinfo || !(rsinfo->allowedModes & SFRM_Materialize)) |
| 104 |
ereport(ERROR, |
| 105 |
(errcode(ERRCODE_SYNTAX_ERROR), |
| 106 |
errmsg("materialize mode required, but it is not " \ |
| 107 |
"allowed in this context"))); |
| 108 |
|
| 109 |
/* get info about element type needed to construct the array */ |
| 110 |
get_typlenbyvalalign(attr_element_type, &attr_len, &attr_byval, &attr_align); |
| 111 |
|
| 112 |
/* get the requested return tuple description */ |
| 113 |
tupdesc = rsinfo->expectedDesc; |
| 114 |
rsinfo_ncols = tupdesc->natts; |
| 115 |
|
| 116 |
/* |
| 117 |
* The requested tuple description better match up with the array |
| 118 |
* we were given. |
| 119 |
*/ |
| 120 |
if (rsinfo_ncols != ncols) |
| 121 |
ereport(ERROR, |
| 122 |
(errcode(ERRCODE_INVALID_PARAMETER_VALUE), |
| 123 |
errmsg("invalid input array"), |
| 124 |
errdetail("Number of elements in array must match number of query specified columns."))); |
| 125 |
|
| 126 |
/* OK, use it */ |
| 127 |
attinmeta = TupleDescGetAttInMetadata(tupdesc); |
| 128 |
|
| 129 |
/* Now go to work */ |
| 130 |
rsinfo->returnMode = SFRM_Materialize; |
| 131 |
|
| 132 |
per_query_ctx = fcinfo->flinfo->fn_mcxt; |
| 133 |
oldcontext = MemoryContextSwitchTo(per_query_ctx); |
| 134 |
|
| 135 |
/* initialize our tuplestore */ |
| 136 |
tupstore = tuplestore_begin_heap(true, false, SortMem); |
| 137 |
|
| 138 |
|
| 139 |
/* take rest of arguments from function */ |
| 140 |
|
| 141 |
/* index path */ |
| 142 |
if (PG_ARGISNULL(0)) { |
| 143 |
ereport(ERROR, |
| 144 |
(errcode(ERRCODE_INVALID_PARAMETER_VALUE), |
| 145 |
errmsg("index path can't be null"), |
| 146 |
errdetail("Index path must be valid full path to HyperEstraier index"))); |
| 147 |
} |
| 148 |
index_path = _textout(PG_GETARG_TEXT_P(0)); |
| 149 |
|
| 150 |
/* query string */ |
| 151 |
if (PG_ARGISNULL(1)) { |
| 152 |
query = ""; |
| 153 |
} else { |
| 154 |
query = _textout(PG_GETARG_TEXT_P(1)); |
| 155 |
} |
| 156 |
|
| 157 |
/* atribute filter */ |
| 158 |
if (PG_ARGISNULL(2)) { |
| 159 |
attr = ""; |
| 160 |
} else { |
| 161 |
attr = _textout(PG_GETARG_TEXT_P(2)); |
| 162 |
} |
| 163 |
|
| 164 |
/* sort order */ |
| 165 |
if (PG_ARGISNULL(3)) { |
| 166 |
order = ""; |
| 167 |
} else { |
| 168 |
order = _textout(PG_GETARG_TEXT_P(3)); |
| 169 |
} |
| 170 |
|
| 171 |
|
| 172 |
/* limit */ |
| 173 |
if (PG_ARGISNULL(4)) { |
| 174 |
limit = 0; |
| 175 |
} else { |
| 176 |
limit = PG_GETARG_INT32(4); |
| 177 |
} |
| 178 |
|
| 179 |
/* offset */ |
| 180 |
if (PG_ARGISNULL(5)) { |
| 181 |
offset = 0; |
| 182 |
} else { |
| 183 |
offset = PG_GETARG_INT32(5); |
| 184 |
} |
| 185 |
|
| 186 |
|
| 187 |
/* open the database */ |
| 188 |
elog(DEBUG1, "pgest_attr: est_db_open(%s)", index_path); |
| 189 |
|
| 190 |
if(!(db = est_db_open(index_path, ESTDBREADER, &ecode))){ |
| 191 |
ereport(ERROR, (errcode(ERRCODE_INVALID_PARAMETER_VALUE), |
| 192 |
errmsg("est_db_open: can't open %s: %d", index_path, ecode), |
| 193 |
errdetail(est_err_msg(ecode)))); |
| 194 |
} |
| 195 |
|
| 196 |
elog(DEBUG1, "pgest_attr: query[%s] attr[%s] limit %d offset %d", query, (PG_ARGISNULL(2) ? "NULL" : attr), limit, offset); |
| 197 |
|
| 198 |
/* create a search condition object */ |
| 199 |
if (!(cond = est_cond_new())) { |
| 200 |
ereport(ERROR, (errcode(ERRCODE_QUERY_CANCELED), |
| 201 |
errmsg("pgest_attr: est_cond_new failed"))); |
| 202 |
} |
| 203 |
|
| 204 |
/* set the search phrase to the search condition object */ |
| 205 |
if (! PG_ARGISNULL(1) && strlen(query) > 0) |
| 206 |
est_cond_set_phrase(cond, query); |
| 207 |
|
| 208 |
/* minimum valid attribute length is 10: @a STREQ a */ |
| 209 |
if (! PG_ARGISNULL(2) && strlen(attr) >= 10) { |
| 210 |
elog(DEBUG1,"attributes: %s", attr); |
| 211 |
char *curr_attr; |
| 212 |
curr_attr = strtok(attr, ATTR_DELIMITER); |
| 213 |
while (curr_attr) { |
| 214 |
elog(DEBUG1,"est_cond_add_attr(%s)", curr_attr); |
| 215 |
est_cond_add_attr(cond, curr_attr); |
| 216 |
curr_attr = strtok(NULL, ATTR_DELIMITER); |
| 217 |
} |
| 218 |
} |
| 219 |
|
| 220 |
/* set the search phrase to the search condition object */ |
| 221 |
if (! PG_ARGISNULL(3) && strlen(order) > 0) { |
| 222 |
elog(DEBUG1,"est_cond_set_order(%s)", order); |
| 223 |
est_cond_set_order(cond, order); |
| 224 |
} |
| 225 |
|
| 226 |
if (limit) { |
| 227 |
elog(DEBUG1,"est_cond_set_max(%d)", limit + offset); |
| 228 |
est_cond_set_max(cond, limit + offset); |
| 229 |
} |
| 230 |
|
| 231 |
/* get the result of search */ |
| 232 |
est_result = est_db_search(db, cond, &resnum, NULL); |
| 233 |
|
| 234 |
/* check if results exists */ |
| 235 |
if ( 0 == resnum ) { |
| 236 |
elog(INFO, "pgest_attr: no results for: %s", query ); |
| 237 |
} |
| 238 |
|
| 239 |
/* total number of tuples to be returned */ |
| 240 |
if (limit && limit < resnum) { |
| 241 |
nrows = limit; |
| 242 |
} else { |
| 243 |
nrows = resnum - offset; |
| 244 |
} |
| 245 |
|
| 246 |
|
| 247 |
elog(DEBUG1, "pgest_attr: found %d hits for %s", resnum, query); |
| 248 |
|
| 249 |
values = (char **) palloc(ncols * sizeof(char *)); |
| 250 |
|
| 251 |
for (i = 0; i < nrows; i++) |
| 252 |
{ |
| 253 |
|
| 254 |
/* get result from estraier */ |
| 255 |
if (! ( doc = est_db_get_doc(db, est_result[i + offset], 0)) ) { |
| 256 |
elog(INFO, "pgest_attr: can't find result %d", i + offset); |
| 257 |
} else { |
| 258 |
elog(DEBUG1, "URI: %s\n Title: %s\n", |
| 259 |
est_doc_attr(doc, "@uri"), |
| 260 |
est_doc_attr(doc, "@title") |
| 261 |
); |
| 262 |
} |
| 263 |
|
| 264 |
/* iterate over results */ |
| 265 |
for (j = 0; j < ncols; j++) |
| 266 |
{ |
| 267 |
bool isnull; |
| 268 |
|
| 269 |
/* array value of this position */ |
| 270 |
indx[0] = j + attr_dim_lower_bounds[0]; |
| 271 |
|
| 272 |
dvalue = array_ref(attr_arr, attr_ndims, indx, -1, attr_len, attr_byval, attr_align, &isnull); |
| 273 |
|
| 274 |
if (!isnull && doc) |
| 275 |
values[j] = DatumGetCString( |
| 276 |
attr2text(doc, |
| 277 |
(char *)DirectFunctionCall1(textout, dvalue) |
| 278 |
)); |
| 279 |
else |
| 280 |
values[j] = NULL; |
| 281 |
} |
| 282 |
/* construct the tuple */ |
| 283 |
tuple = BuildTupleFromCStrings(attinmeta, values); |
| 284 |
|
| 285 |
/* now store it */ |
| 286 |
tuplestore_puttuple(tupstore, tuple); |
| 287 |
|
| 288 |
/* delete estraier document object */ |
| 289 |
if (doc) est_doc_delete(doc); |
| 290 |
} |
| 291 |
|
| 292 |
tuplestore_donestoring(tupstore); |
| 293 |
rsinfo->setResult = tupstore; |
| 294 |
|
| 295 |
/* |
| 296 |
* SFRM_Materialize mode expects us to return a NULL Datum. The actual |
| 297 |
* tuples are in our tuplestore and passed back through |
| 298 |
* rsinfo->setResult. rsinfo->setDesc is set to the tuple description |
| 299 |
* that we actually used to build our tuples with, so the caller can |
| 300 |
* verify we did what it was expecting. |
| 301 |
*/ |
| 302 |
rsinfo->setDesc = tupdesc; |
| 303 |
MemoryContextSwitchTo(oldcontext); |
| 304 |
|
| 305 |
est_cond_delete(cond); |
| 306 |
|
| 307 |
if(!est_db_close(db, &ecode)){ |
| 308 |
ereport(ERROR, (errcode(ERRCODE_IO_ERROR), |
| 309 |
errmsg("est_db_close: %d", ecode), |
| 310 |
errdetail(est_err_msg(ecode)))); |
| 311 |
} |
| 312 |
|
| 313 |
return (Datum) 0; |
| 314 |
} |
| 315 |
|
| 316 |
|
| 317 |
/* make text var from attr */ |
| 318 |
char *attr2text(ESTDOC *doc, char *attr) { |
| 319 |
char *val; |
| 320 |
const char *attrval; |
| 321 |
int len; |
| 322 |
int attrlen; |
| 323 |
|
| 324 |
if (! doc) return (Datum) NULL; |
| 325 |
|
| 326 |
elog(DEBUG1, "doc: %08x, attr: %s", doc, attr); |
| 327 |
|
| 328 |
if ( (attrval = est_doc_attr(doc, attr)) && (attrlen = strlen(attrval)) ) { |
| 329 |
val = (char *) palloc(attrlen * sizeof(char)); |
| 330 |
} else { |
| 331 |
return (Datum) NULL; |
| 332 |
} |
| 333 |
|
| 334 |
len = strlen(attrval); |
| 335 |
elog(DEBUG1, "attr2text(%s) = '%s' %d bytes", attr, attrval, len); |
| 336 |
|
| 337 |
len++; |
| 338 |
len *= sizeof(char); |
| 339 |
|
| 340 |
elog(DEBUG2, "palloc(%d)", len); |
| 341 |
|
| 342 |
val = palloc(len); |
| 343 |
|
| 344 |
memset(val, 0, len); |
| 345 |
strncpy(val, attrval, len); |
| 346 |
|
| 347 |
elog(DEBUG2, "val=%s", val); |
| 348 |
|
| 349 |
return val; |
| 350 |
} |
| 351 |
|
| 352 |
/* |
| 353 |
* variation on theme: use node API which doesn't open index on |
| 354 |
* every query which is much faster for large indexes |
| 355 |
* |
| 356 |
*/ |
| 357 |
|
| 358 |
/* select * from pgest( */ |
| 359 |
#define _arg_node_uri 0 |
| 360 |
#define _arg_login 1 |
| 361 |
#define _arg_passwd 2 |
| 362 |
#define _arg_depth 3 |
| 363 |
#define _arg_query 4 |
| 364 |
#define _arg_attr 5 |
| 365 |
#define _arg_order 6 |
| 366 |
#define _arg_limit 7 |
| 367 |
#define _arg_offset 8 |
| 368 |
#define _arg_attr_array 9 |
| 369 |
/* as (foo text, ... ); */ |
| 370 |
|
| 371 |
|
| 372 |
PG_FUNCTION_INFO_V1(pgest_node); |
| 373 |
Datum pgest_node(PG_FUNCTION_ARGS) |
| 374 |
{ |
| 375 |
ArrayType *attr_arr = PG_GETARG_ARRAYTYPE_P(_arg_attr_array); |
| 376 |
Oid attr_element_type = ARR_ELEMTYPE(attr_arr); |
| 377 |
int attr_ndims = ARR_NDIM(attr_arr); |
| 378 |
int *attr_dim_counts = ARR_DIMS(attr_arr); |
| 379 |
int *attr_dim_lower_bounds = ARR_LBOUND(attr_arr); |
| 380 |
int ncols = 0; |
| 381 |
int nrows = 0; |
| 382 |
int indx[MAXDIM]; |
| 383 |
int16 attr_len; |
| 384 |
bool attr_byval; |
| 385 |
char attr_align; |
| 386 |
ReturnSetInfo *rsinfo = (ReturnSetInfo *) fcinfo->resultinfo; |
| 387 |
AttInMetadata *attinmeta; |
| 388 |
TupleDesc tupdesc; |
| 389 |
Tuplestorestate *tupstore = NULL; |
| 390 |
HeapTuple tuple; |
| 391 |
MemoryContext per_query_ctx; |
| 392 |
MemoryContext oldcontext; |
| 393 |
Datum dvalue; |
| 394 |
char **values; |
| 395 |
int rsinfo_ncols; |
| 396 |
int i, j; |
| 397 |
/* estvars */ |
| 398 |
ESTNODE *node; |
| 399 |
ESTCOND *cond; |
| 400 |
ESTNODERES *nres; |
| 401 |
ESTRESDOC *rdoc; |
| 402 |
const CBLIST *texts; |
| 403 |
int resnum = 0; |
| 404 |
int limit = 0; |
| 405 |
int offset = 0; |
| 406 |
int depth = 0; |
| 407 |
|
| 408 |
char *node_url; |
| 409 |
char *user, *passwd; |
| 410 |
char *query; |
| 411 |
char *attr; |
| 412 |
char *order; |
| 413 |
|
| 414 |
|
| 415 |
/* only allow 1D input array */ |
| 416 |
if (attr_ndims == 1) |
| 417 |
{ |
| 418 |
ncols = attr_dim_counts[0]; |
| 419 |
} |
| 420 |
else |
| 421 |
ereport(ERROR, |
| 422 |
(errcode(ERRCODE_INVALID_PARAMETER_VALUE), |
| 423 |
errmsg("invalid input array"), |
| 424 |
errdetail("Input array must have 1 dimension"))); |
| 425 |
|
| 426 |
/* check to see if caller supports us returning a tuplestore */ |
| 427 |
if (!rsinfo || !(rsinfo->allowedModes & SFRM_Materialize)) |
| 428 |
ereport(ERROR, |
| 429 |
(errcode(ERRCODE_SYNTAX_ERROR), |
| 430 |
errmsg("materialize mode required, but it is not " \ |
| 431 |
"allowed in this context"))); |
| 432 |
|
| 433 |
/* get info about element type needed to construct the array */ |
| 434 |
get_typlenbyvalalign(attr_element_type, &attr_len, &attr_byval, &attr_align); |
| 435 |
|
| 436 |
/* get the requested return tuple description */ |
| 437 |
tupdesc = rsinfo->expectedDesc; |
| 438 |
rsinfo_ncols = tupdesc->natts; |
| 439 |
|
| 440 |
/* |
| 441 |
* The requested tuple description better match up with the array |
| 442 |
* we were given. |
| 443 |
*/ |
| 444 |
if (rsinfo_ncols != ncols) |
| 445 |
ereport(ERROR, |
| 446 |
(errcode(ERRCODE_INVALID_PARAMETER_VALUE), |
| 447 |
errmsg("invalid input array"), |
| 448 |
errdetail("Number of elements in array must match number of query specified columns."))); |
| 449 |
|
| 450 |
/* OK, use it */ |
| 451 |
attinmeta = TupleDescGetAttInMetadata(tupdesc); |
| 452 |
|
| 453 |
/* Now go to work */ |
| 454 |
rsinfo->returnMode = SFRM_Materialize; |
| 455 |
|
| 456 |
per_query_ctx = fcinfo->flinfo->fn_mcxt; |
| 457 |
oldcontext = MemoryContextSwitchTo(per_query_ctx); |
| 458 |
|
| 459 |
/* initialize our tuplestore */ |
| 460 |
tupstore = tuplestore_begin_heap(true, false, SortMem); |
| 461 |
|
| 462 |
|
| 463 |
/* take rest of arguments from function */ |
| 464 |
|
| 465 |
/* node URL */ |
| 466 |
if (PG_ARGISNULL(_arg_node_uri)) { |
| 467 |
ereport(ERROR, |
| 468 |
(errcode(ERRCODE_INVALID_PARAMETER_VALUE), |
| 469 |
errmsg("node URL can't be null"), |
| 470 |
errdetail("Node URL must be valid URL to HyperEstraier node"))); |
| 471 |
} |
| 472 |
node_url = _textout(PG_GETARG_TEXT_P(_arg_node_uri)); |
| 473 |
|
| 474 |
/* login and password */ |
| 475 |
if (PG_ARGISNULL(_arg_login) || PG_ARGISNULL(_arg_passwd)) { |
| 476 |
ereport(ERROR, |
| 477 |
(errcode(ERRCODE_INVALID_PARAMETER_VALUE), |
| 478 |
errmsg("username and password can't be NULL"), |
| 479 |
errdetail("You must specify valid username and password to HyperEstraier node"))); |
| 480 |
} |
| 481 |
user = _textout(PG_GETARG_TEXT_P(_arg_login)); |
| 482 |
passwd = _textout(PG_GETARG_TEXT_P(_arg_passwd)); |
| 483 |
|
| 484 |
/* depth of search */ |
| 485 |
if (PG_ARGISNULL(_arg_depth)) { |
| 486 |
depth = 0; |
| 487 |
} else { |
| 488 |
depth = PG_GETARG_INT32(_arg_depth); |
| 489 |
} |
| 490 |
|
| 491 |
/* query string */ |
| 492 |
if (PG_ARGISNULL(_arg_query)) { |
| 493 |
query = ""; |
| 494 |
} else { |
| 495 |
query = _textout(PG_GETARG_TEXT_P(_arg_query)); |
| 496 |
} |
| 497 |
|
| 498 |
/* atribute filter */ |
| 499 |
if (PG_ARGISNULL(_arg_attr)) { |
| 500 |
attr = ""; |
| 501 |
} else { |
| 502 |
attr = _textout(PG_GETARG_TEXT_P(_arg_attr)); |
| 503 |
} |
| 504 |
|
| 505 |
/* sort order */ |
| 506 |
if (PG_ARGISNULL(_arg_order)) { |
| 507 |
order = ""; |
| 508 |
} else { |
| 509 |
order = _textout(PG_GETARG_TEXT_P(_arg_order)); |
| 510 |
} |
| 511 |
|
| 512 |
|
| 513 |
/* limit */ |
| 514 |
if (PG_ARGISNULL(_arg_limit)) { |
| 515 |
limit = 0; |
| 516 |
} else { |
| 517 |
limit = PG_GETARG_INT32(_arg_limit); |
| 518 |
} |
| 519 |
|
| 520 |
/* offset */ |
| 521 |
if (PG_ARGISNULL(_arg_offset)) { |
| 522 |
offset = 0; |
| 523 |
} else { |
| 524 |
offset = PG_GETARG_INT32(_arg_offset); |
| 525 |
} |
| 526 |
|
| 527 |
/* initialize the network environment */ |
| 528 |
if(!est_init_net_env()){ |
| 529 |
ereport(ERROR, (errcode(ERRCODE_QUERY_CANCELED), |
| 530 |
errmsg("pgest_node: can't create network enviroment"))); |
| 531 |
} |
| 532 |
|
| 533 |
/* create the node connection object */ |
| 534 |
elog(DEBUG1, "pgest_node: est_node_new(%s) as %s", node_url, user); |
| 535 |
node = est_node_new(node_url); |
| 536 |
est_node_set_auth(node, user, passwd); |
| 537 |
|
| 538 |
elog(DEBUG1, "pgest_node: node: %s (d:%d) query[%s] attr[%s] limit %d offset %d", node_url, depth, query, (PG_ARGISNULL(_arg_attr) ? "NULL" : attr), limit, offset); |
| 539 |
|
| 540 |
/* create a search condition object */ |
| 541 |
if (!(cond = est_cond_new())) { |
| 542 |
ereport(ERROR, (errcode(ERRCODE_QUERY_CANCELED), |
| 543 |
errmsg("pgest_node: est_cond_new failed"))); |
| 544 |
} |
| 545 |
|
| 546 |
/* set the search phrase to the search condition object */ |
| 547 |
if (! PG_ARGISNULL(_arg_query) && strlen(query) > 0) |
| 548 |
est_cond_set_phrase(cond, query); |
| 549 |
|
| 550 |
/* minimum valid attribute length is 10: @a STREQ a */ |
| 551 |
if (! PG_ARGISNULL(_arg_attr) && strlen(attr) >= 10) { |
| 552 |
elog(DEBUG1,"attributes: %s", attr); |
| 553 |
char *curr_attr; |
| 554 |
curr_attr = strtok(attr, ATTR_DELIMITER); |
| 555 |
while (curr_attr) { |
| 556 |
elog(DEBUG1,"est_cond_add_attr(%s)", curr_attr); |
| 557 |
est_cond_add_attr(cond, curr_attr); |
| 558 |
curr_attr = strtok(NULL, ATTR_DELIMITER); |
| 559 |
} |
| 560 |
} |
| 561 |
|
| 562 |
/* set the search phrase to the search condition object */ |
| 563 |
if (! PG_ARGISNULL(_arg_order) && strlen(order) > 0) { |
| 564 |
elog(DEBUG1,"est_cond_set_order(%s)", order); |
| 565 |
est_cond_set_order(cond, order); |
| 566 |
} |
| 567 |
|
| 568 |
if (limit) { |
| 569 |
elog(DEBUG1,"est_cond_set_max(%d)", limit + offset); |
| 570 |
est_cond_set_max(cond, limit + offset); |
| 571 |
} |
| 572 |
|
| 573 |
/* get the result of search */ |
| 574 |
nres = est_node_search(node, cond, depth); |
| 575 |
|
| 576 |
if (! nres) { |
| 577 |
int status = est_node_status(node); |
| 578 |
est_cond_delete(cond); |
| 579 |
est_node_delete(node); |
| 580 |
est_free_net_env(); |
| 581 |
ereport(ERROR, (errcode(ERRCODE_QUERY_CANCELED), |
| 582 |
errmsg("pgest_node: search failed, node status %d", status))); |
| 583 |
} |
| 584 |
|
| 585 |
/* get number of results */ |
| 586 |
resnum = est_noderes_doc_num(nres); |
| 587 |
|
| 588 |
/* check if results exists */ |
| 589 |
if ( 0 == resnum ) { |
| 590 |
elog(INFO, "pgest_node: no results for: %s", query ); |
| 591 |
} |
| 592 |
|
| 593 |
/* total number of tuples to be returned */ |
| 594 |
if (limit && limit < resnum) { |
| 595 |
nrows = limit; |
| 596 |
} else { |
| 597 |
nrows = resnum - offset; |
| 598 |
} |
| 599 |
|
| 600 |
|
| 601 |
elog(DEBUG1, "pgest_node: found %d hits for %s", resnum, query); |
| 602 |
|
| 603 |
|
| 604 |
values = (char **) palloc(ncols * sizeof(char *)); |
| 605 |
|
| 606 |
for (i = 0; i < nrows; i++) |
| 607 |
{ |
| 608 |
|
| 609 |
/* get result from estraier */ |
| 610 |
if (! ( rdoc = est_noderes_get_doc(nres, i + offset) )) { |
| 611 |
elog(INFO, "pgest_node: can't find result %d", i + offset); |
| 612 |
} else { |
| 613 |
elog(DEBUG1, "URI: %s\n Title: %s\n", |
| 614 |
est_resdoc_attr(rdoc, "@uri"), |
| 615 |
est_resdoc_attr(rdoc, "@title") |
| 616 |
); |
| 617 |
} |
| 618 |
|
| 619 |
/* iterate over results */ |
| 620 |
for (j = 0; j < ncols; j++) |
| 621 |
{ |
| 622 |
bool isnull; |
| 623 |
|
| 624 |
/* array value of this position */ |
| 625 |
indx[0] = j + attr_dim_lower_bounds[0]; |
| 626 |
|
| 627 |
dvalue = array_ref(attr_arr, attr_ndims, indx, -1, attr_len, attr_byval, attr_align, &isnull); |
| 628 |
|
| 629 |
if (!isnull && rdoc) |
| 630 |
values[j] = DatumGetCString( |
| 631 |
node_attr2text(rdoc, |
| 632 |
(char *)DirectFunctionCall1(textout, dvalue) |
| 633 |
)); |
| 634 |
else |
| 635 |
values[j] = NULL; |
| 636 |
} |
| 637 |
/* construct the tuple */ |
| 638 |
tuple = BuildTupleFromCStrings(attinmeta, values); |
| 639 |
|
| 640 |
/* now store it */ |
| 641 |
tuplestore_puttuple(tupstore, tuple); |
| 642 |
|
| 643 |
} |
| 644 |
|
| 645 |
tuplestore_donestoring(tupstore); |
| 646 |
rsinfo->setResult = tupstore; |
| 647 |
|
| 648 |
/* |
| 649 |
* SFRM_Materialize mode expects us to return a NULL Datum. The actual |
| 650 |
* tuples are in our tuplestore and passed back through |
| 651 |
* rsinfo->setResult. rsinfo->setDesc is set to the tuple description |
| 652 |
* that we actually used to build our tuples with, so the caller can |
| 653 |
* verify we did what it was expecting. |
| 654 |
*/ |
| 655 |
rsinfo->setDesc = tupdesc; |
| 656 |
MemoryContextSwitchTo(oldcontext); |
| 657 |
|
| 658 |
/* delete the node result object */ |
| 659 |
est_noderes_delete(nres); |
| 660 |
|
| 661 |
/* destroy the search condition object */ |
| 662 |
est_cond_delete(cond); |
| 663 |
|
| 664 |
/* destroy the node object */ |
| 665 |
est_node_delete(node); |
| 666 |
|
| 667 |
/* free the networking environment */ |
| 668 |
est_free_net_env(); |
| 669 |
|
| 670 |
return (Datum) 0; |
| 671 |
} |
| 672 |
|
| 673 |
/* make text var from node attr */ |
| 674 |
char *node_attr2text(ESTRESDOC *rdoc, char *attr) { |
| 675 |
char *val; |
| 676 |
const char *attrval; |
| 677 |
int len; |
| 678 |
int attrlen; |
| 679 |
|
| 680 |
if (! rdoc) return (Datum) NULL; |
| 681 |
|
| 682 |
elog(DEBUG1, "doc: %08x, attr: %s", rdoc, attr); |
| 683 |
|
| 684 |
if ( (attrval = est_resdoc_attr(rdoc, attr)) && (attrlen = strlen(attrval)) ) { |
| 685 |
val = (char *) palloc(attrlen * sizeof(char)); |
| 686 |
} else { |
| 687 |
return (Datum) NULL; |
| 688 |
} |
| 689 |
|
| 690 |
len = strlen(attrval); |
| 691 |
elog(DEBUG1, "node_attr2text(%s) = '%s' %d bytes", attr, attrval, len); |
| 692 |
|
| 693 |
len++; |
| 694 |
len *= sizeof(char); |
| 695 |
|
| 696 |
elog(DEBUG2, "palloc(%d)", len); |
| 697 |
|
| 698 |
val = palloc(len); |
| 699 |
|
| 700 |
memset(val, 0, len); |
| 701 |
strncpy(val, attrval, len); |
| 702 |
|
| 703 |
elog(DEBUG2, "val=%s", val); |
| 704 |
|
| 705 |
return val; |
| 706 |
} |
| 707 |
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