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_query 3 |
363 |
#define _arg_attr 4 |
364 |
#define _arg_order 5 |
365 |
#define _arg_limit 6 |
366 |
#define _arg_offset 7 |
367 |
#define _arg_attr_array 8 |
368 |
/* as (foo text, ... ); */ |
369 |
|
370 |
|
371 |
PG_FUNCTION_INFO_V1(pgest_node); |
372 |
Datum pgest_node(PG_FUNCTION_ARGS) |
373 |
{ |
374 |
ArrayType *attr_arr = PG_GETARG_ARRAYTYPE_P(_arg_attr_array); |
375 |
Oid attr_element_type = ARR_ELEMTYPE(attr_arr); |
376 |
int attr_ndims = ARR_NDIM(attr_arr); |
377 |
int *attr_dim_counts = ARR_DIMS(attr_arr); |
378 |
int *attr_dim_lower_bounds = ARR_LBOUND(attr_arr); |
379 |
int ncols = 0; |
380 |
int nrows = 0; |
381 |
int indx[MAXDIM]; |
382 |
int16 attr_len; |
383 |
bool attr_byval; |
384 |
char attr_align; |
385 |
ReturnSetInfo *rsinfo = (ReturnSetInfo *) fcinfo->resultinfo; |
386 |
AttInMetadata *attinmeta; |
387 |
TupleDesc tupdesc; |
388 |
Tuplestorestate *tupstore = NULL; |
389 |
HeapTuple tuple; |
390 |
MemoryContext per_query_ctx; |
391 |
MemoryContext oldcontext; |
392 |
Datum dvalue; |
393 |
char **values; |
394 |
int rsinfo_ncols; |
395 |
int i, j; |
396 |
/* estvars */ |
397 |
ESTNODE *node; |
398 |
ESTCOND *cond; |
399 |
ESTNODERES *nres; |
400 |
ESTRESDOC *rdoc; |
401 |
const CBLIST *texts; |
402 |
int resnum = 0; |
403 |
int limit = 0; |
404 |
int offset = 0; |
405 |
|
406 |
char *node_url; |
407 |
char *user, *passwd; |
408 |
char *query; |
409 |
char *attr; |
410 |
char *order; |
411 |
|
412 |
|
413 |
/* only allow 1D input array */ |
414 |
if (attr_ndims == 1) |
415 |
{ |
416 |
ncols = attr_dim_counts[0]; |
417 |
} |
418 |
else |
419 |
ereport(ERROR, |
420 |
(errcode(ERRCODE_INVALID_PARAMETER_VALUE), |
421 |
errmsg("invalid input array"), |
422 |
errdetail("Input array must have 1 dimension"))); |
423 |
|
424 |
/* check to see if caller supports us returning a tuplestore */ |
425 |
if (!rsinfo || !(rsinfo->allowedModes & SFRM_Materialize)) |
426 |
ereport(ERROR, |
427 |
(errcode(ERRCODE_SYNTAX_ERROR), |
428 |
errmsg("materialize mode required, but it is not " \ |
429 |
"allowed in this context"))); |
430 |
|
431 |
/* get info about element type needed to construct the array */ |
432 |
get_typlenbyvalalign(attr_element_type, &attr_len, &attr_byval, &attr_align); |
433 |
|
434 |
/* get the requested return tuple description */ |
435 |
tupdesc = rsinfo->expectedDesc; |
436 |
rsinfo_ncols = tupdesc->natts; |
437 |
|
438 |
/* |
439 |
* The requested tuple description better match up with the array |
440 |
* we were given. |
441 |
*/ |
442 |
if (rsinfo_ncols != ncols) |
443 |
ereport(ERROR, |
444 |
(errcode(ERRCODE_INVALID_PARAMETER_VALUE), |
445 |
errmsg("invalid input array"), |
446 |
errdetail("Number of elements in array must match number of query specified columns."))); |
447 |
|
448 |
/* OK, use it */ |
449 |
attinmeta = TupleDescGetAttInMetadata(tupdesc); |
450 |
|
451 |
/* Now go to work */ |
452 |
rsinfo->returnMode = SFRM_Materialize; |
453 |
|
454 |
per_query_ctx = fcinfo->flinfo->fn_mcxt; |
455 |
oldcontext = MemoryContextSwitchTo(per_query_ctx); |
456 |
|
457 |
/* initialize our tuplestore */ |
458 |
tupstore = tuplestore_begin_heap(true, false, SortMem); |
459 |
|
460 |
|
461 |
/* take rest of arguments from function */ |
462 |
|
463 |
/* node URL */ |
464 |
if (PG_ARGISNULL(_arg_node_uri)) { |
465 |
ereport(ERROR, |
466 |
(errcode(ERRCODE_INVALID_PARAMETER_VALUE), |
467 |
errmsg("node URL can't be null"), |
468 |
errdetail("Node URL must be valid URL to HyperEstraier node"))); |
469 |
} |
470 |
node_url = _textout(PG_GETARG_TEXT_P(_arg_node_uri)); |
471 |
|
472 |
/* login and password */ |
473 |
if (PG_ARGISNULL(_arg_login) || PG_ARGISNULL(_arg_passwd)) { |
474 |
ereport(ERROR, |
475 |
(errcode(ERRCODE_INVALID_PARAMETER_VALUE), |
476 |
errmsg("username and password can't be NULL"), |
477 |
errdetail("You must specify valid username and password to HyperEstraier node"))); |
478 |
} |
479 |
user = _textout(PG_GETARG_TEXT_P(_arg_login)); |
480 |
passwd = _textout(PG_GETARG_TEXT_P(_arg_passwd)); |
481 |
|
482 |
/* query string */ |
483 |
if (PG_ARGISNULL(_arg_query)) { |
484 |
query = ""; |
485 |
} else { |
486 |
query = _textout(PG_GETARG_TEXT_P(_arg_query)); |
487 |
} |
488 |
|
489 |
/* atribute filter */ |
490 |
if (PG_ARGISNULL(_arg_attr)) { |
491 |
attr = ""; |
492 |
} else { |
493 |
attr = _textout(PG_GETARG_TEXT_P(_arg_attr)); |
494 |
} |
495 |
|
496 |
/* sort order */ |
497 |
if (PG_ARGISNULL(_arg_order)) { |
498 |
order = ""; |
499 |
} else { |
500 |
order = _textout(PG_GETARG_TEXT_P(_arg_order)); |
501 |
} |
502 |
|
503 |
|
504 |
/* limit */ |
505 |
if (PG_ARGISNULL(_arg_limit)) { |
506 |
limit = 0; |
507 |
} else { |
508 |
limit = PG_GETARG_INT32(_arg_limit); |
509 |
} |
510 |
|
511 |
/* offset */ |
512 |
if (PG_ARGISNULL(_arg_offset)) { |
513 |
offset = 0; |
514 |
} else { |
515 |
offset = PG_GETARG_INT32(_arg_offset); |
516 |
} |
517 |
|
518 |
/* initialize the network environment */ |
519 |
if(!est_init_net_env()){ |
520 |
ereport(ERROR, (errcode(ERRCODE_QUERY_CANCELED), |
521 |
errmsg("pgest_node: can't create network enviroment"))); |
522 |
} |
523 |
|
524 |
/* create the node connection object */ |
525 |
elog(DEBUG1, "pgest_node: est_node_new(%s) as %s", node_url, user); |
526 |
node = est_node_new(node_url); |
527 |
est_node_set_auth(node, user, passwd); |
528 |
|
529 |
elog(DEBUG1, "pgest_node: query[%s] attr[%s] limit %d offset %d", query, (PG_ARGISNULL(_arg_attr) ? "NULL" : attr), limit, offset); |
530 |
|
531 |
/* create a search condition object */ |
532 |
if (!(cond = est_cond_new())) { |
533 |
ereport(ERROR, (errcode(ERRCODE_QUERY_CANCELED), |
534 |
errmsg("pgest_node: est_cond_new failed"))); |
535 |
} |
536 |
|
537 |
/* set the search phrase to the search condition object */ |
538 |
if (! PG_ARGISNULL(_arg_query) && strlen(query) > 0) |
539 |
est_cond_set_phrase(cond, query); |
540 |
|
541 |
/* minimum valid attribute length is 10: @a STREQ a */ |
542 |
if (! PG_ARGISNULL(_arg_attr) && strlen(attr) >= 10) { |
543 |
elog(DEBUG1,"attributes: %s", attr); |
544 |
char *curr_attr; |
545 |
curr_attr = strtok(attr, ATTR_DELIMITER); |
546 |
while (curr_attr) { |
547 |
elog(DEBUG1,"est_cond_add_attr(%s)", curr_attr); |
548 |
est_cond_add_attr(cond, curr_attr); |
549 |
curr_attr = strtok(NULL, ATTR_DELIMITER); |
550 |
} |
551 |
} |
552 |
|
553 |
/* set the search phrase to the search condition object */ |
554 |
if (! PG_ARGISNULL(_arg_order) && strlen(order) > 0) { |
555 |
elog(DEBUG1,"est_cond_set_order(%s)", order); |
556 |
est_cond_set_order(cond, order); |
557 |
} |
558 |
|
559 |
if (limit) { |
560 |
elog(DEBUG1,"est_cond_set_max(%d)", limit + offset); |
561 |
est_cond_set_max(cond, limit + offset); |
562 |
} |
563 |
|
564 |
/* get the result of search */ |
565 |
/* FIXME: allow user to specify depath of search */ |
566 |
nres = est_node_search(node, cond, 0); |
567 |
|
568 |
if (! nres) { |
569 |
int status = est_node_status(node); |
570 |
est_cond_delete(cond); |
571 |
est_node_delete(node); |
572 |
est_free_net_env(); |
573 |
ereport(ERROR, (errcode(ERRCODE_QUERY_CANCELED), |
574 |
errmsg("pgest_node: search failed, node status %d", status))); |
575 |
} |
576 |
|
577 |
/* get number of results */ |
578 |
resnum = est_noderes_doc_num(nres); |
579 |
|
580 |
/* check if results exists */ |
581 |
if ( 0 == resnum ) { |
582 |
elog(INFO, "pgest_node: no results for: %s", query ); |
583 |
} |
584 |
|
585 |
/* total number of tuples to be returned */ |
586 |
if (limit && limit < resnum) { |
587 |
nrows = limit; |
588 |
} else { |
589 |
nrows = resnum - offset; |
590 |
} |
591 |
|
592 |
|
593 |
elog(DEBUG1, "pgest_node: found %d hits for %s", resnum, query); |
594 |
|
595 |
|
596 |
values = (char **) palloc(ncols * sizeof(char *)); |
597 |
|
598 |
for (i = 0; i < nrows; i++) |
599 |
{ |
600 |
|
601 |
/* get result from estraier */ |
602 |
if (! ( rdoc = est_noderes_get_doc(nres, i + offset) )) { |
603 |
elog(INFO, "pgest_node: can't find result %d", i + offset); |
604 |
} else { |
605 |
elog(DEBUG1, "URI: %s\n Title: %s\n", |
606 |
est_resdoc_attr(rdoc, "@uri"), |
607 |
est_resdoc_attr(rdoc, "@title") |
608 |
); |
609 |
} |
610 |
|
611 |
/* iterate over results */ |
612 |
for (j = 0; j < ncols; j++) |
613 |
{ |
614 |
bool isnull; |
615 |
|
616 |
/* array value of this position */ |
617 |
indx[0] = j + attr_dim_lower_bounds[0]; |
618 |
|
619 |
dvalue = array_ref(attr_arr, attr_ndims, indx, -1, attr_len, attr_byval, attr_align, &isnull); |
620 |
|
621 |
if (!isnull && rdoc) |
622 |
values[j] = DatumGetCString( |
623 |
node_attr2text(rdoc, |
624 |
(char *)DirectFunctionCall1(textout, dvalue) |
625 |
)); |
626 |
else |
627 |
values[j] = NULL; |
628 |
} |
629 |
/* construct the tuple */ |
630 |
tuple = BuildTupleFromCStrings(attinmeta, values); |
631 |
|
632 |
/* now store it */ |
633 |
tuplestore_puttuple(tupstore, tuple); |
634 |
|
635 |
} |
636 |
|
637 |
tuplestore_donestoring(tupstore); |
638 |
rsinfo->setResult = tupstore; |
639 |
|
640 |
/* |
641 |
* SFRM_Materialize mode expects us to return a NULL Datum. The actual |
642 |
* tuples are in our tuplestore and passed back through |
643 |
* rsinfo->setResult. rsinfo->setDesc is set to the tuple description |
644 |
* that we actually used to build our tuples with, so the caller can |
645 |
* verify we did what it was expecting. |
646 |
*/ |
647 |
rsinfo->setDesc = tupdesc; |
648 |
MemoryContextSwitchTo(oldcontext); |
649 |
|
650 |
/* delete the node result object */ |
651 |
est_noderes_delete(nres); |
652 |
|
653 |
/* destroy the search condition object */ |
654 |
est_cond_delete(cond); |
655 |
|
656 |
/* destroy the node object */ |
657 |
est_node_delete(node); |
658 |
|
659 |
/* free the networking environment */ |
660 |
est_free_net_env(); |
661 |
|
662 |
return (Datum) 0; |
663 |
} |
664 |
|
665 |
/* make text var from node attr */ |
666 |
char *node_attr2text(ESTRESDOC *rdoc, char *attr) { |
667 |
char *val; |
668 |
const char *attrval; |
669 |
int len; |
670 |
int attrlen; |
671 |
|
672 |
if (! rdoc) return (Datum) NULL; |
673 |
|
674 |
elog(DEBUG1, "doc: %08x, attr: %s", rdoc, attr); |
675 |
|
676 |
if ( (attrval = est_resdoc_attr(rdoc, attr)) && (attrlen = strlen(attrval)) ) { |
677 |
val = (char *) palloc(attrlen * sizeof(char)); |
678 |
} else { |
679 |
return (Datum) NULL; |
680 |
} |
681 |
|
682 |
len = strlen(attrval); |
683 |
elog(DEBUG1, "node_attr2text(%s) = '%s' %d bytes", attr, attrval, len); |
684 |
|
685 |
len++; |
686 |
len *= sizeof(char); |
687 |
|
688 |
elog(DEBUG2, "palloc(%d)", len); |
689 |
|
690 |
val = palloc(len); |
691 |
|
692 |
memset(val, 0, len); |
693 |
strncpy(val, attrval, len); |
694 |
|
695 |
elog(DEBUG2, "val=%s", val); |
696 |
|
697 |
return val; |
698 |
} |
699 |
|