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 "utils/lsyscache.h" |
29 |
#include "miscadmin.h" |
30 |
#include "commands/trigger.h" |
31 |
#include "executor/spi.h" |
32 |
|
33 |
#include <estraier.h> |
34 |
#include <cabin.h> |
35 |
#include <estnode.h> |
36 |
|
37 |
#define _textin(str) DirectFunctionCall1(textin, CStringGetDatum(str)) |
38 |
#define _textout(str) DatumGetPointer(DirectFunctionCall1(textout, PointerGetDatum(str))) |
39 |
#define GET_STR(textp) DatumGetCString(DirectFunctionCall1(textout, PointerGetDatum(textp))) |
40 |
#define GET_TEXT(cstrp) DatumGetTextP(DirectFunctionCall1(textin, CStringGetDatum(cstrp))) |
41 |
|
42 |
/* SortMem got renamed in PostgreSQL 8.0 */ |
43 |
#ifndef SortMem |
44 |
#define SortMem 16 * 1024 |
45 |
#endif |
46 |
|
47 |
#define ATTR_DELIMITER "{{!}}" |
48 |
#define HINTS_PREFIX "HINTS." |
49 |
|
50 |
/* prototype */ |
51 |
char *attr2text(ESTDOC *doc, char *attr); |
52 |
char *node_attr2text(ESTRESDOC *rdoc, char *attr); |
53 |
void cond_add_attr(ESTCOND *cond, char *attr); |
54 |
|
55 |
|
56 |
/* work in progress */ |
57 |
PG_FUNCTION_INFO_V1(pgest_attr); |
58 |
Datum pgest_attr(PG_FUNCTION_ARGS) |
59 |
{ |
60 |
ArrayType *attr_arr = PG_GETARG_ARRAYTYPE_P(6); |
61 |
Oid attr_element_type = ARR_ELEMTYPE(attr_arr); |
62 |
int attr_ndims = ARR_NDIM(attr_arr); |
63 |
int *attr_dim_counts = ARR_DIMS(attr_arr); |
64 |
int *attr_dim_lower_bounds = ARR_LBOUND(attr_arr); |
65 |
int ncols = 0; |
66 |
int nrows = 0; |
67 |
int indx[MAXDIM]; |
68 |
int16 attr_len; |
69 |
bool attr_byval; |
70 |
char attr_align; |
71 |
ReturnSetInfo *rsinfo = (ReturnSetInfo *) fcinfo->resultinfo; |
72 |
AttInMetadata *attinmeta; |
73 |
TupleDesc tupdesc; |
74 |
Tuplestorestate *tupstore = NULL; |
75 |
HeapTuple tuple; |
76 |
MemoryContext per_query_ctx; |
77 |
MemoryContext oldcontext; |
78 |
Datum dvalue; |
79 |
char **values; |
80 |
int rsinfo_ncols; |
81 |
int i, j; |
82 |
/* estvars */ |
83 |
ESTDB *db; |
84 |
ESTCOND *cond; |
85 |
ESTDOC *doc; |
86 |
int ecode, *est_result, resnum; |
87 |
int limit = 0; |
88 |
int offset = 0; |
89 |
|
90 |
char *index_path; |
91 |
char *query; |
92 |
char *attr; |
93 |
char *order; |
94 |
|
95 |
|
96 |
/* only allow 1D input array */ |
97 |
if (attr_ndims == 1) |
98 |
{ |
99 |
ncols = attr_dim_counts[0]; |
100 |
} |
101 |
else |
102 |
ereport(ERROR, |
103 |
(errcode(ERRCODE_INVALID_PARAMETER_VALUE), |
104 |
errmsg("invalid input array"), |
105 |
errdetail("Input array must have 1 dimension"))); |
106 |
|
107 |
/* check to see if caller supports us returning a tuplestore */ |
108 |
if (!rsinfo || !(rsinfo->allowedModes & SFRM_Materialize)) |
109 |
ereport(ERROR, |
110 |
(errcode(ERRCODE_SYNTAX_ERROR), |
111 |
errmsg("materialize mode required, but it is not " \ |
112 |
"allowed in this context"))); |
113 |
|
114 |
/* get info about element type needed to construct the array */ |
115 |
get_typlenbyvalalign(attr_element_type, &attr_len, &attr_byval, &attr_align); |
116 |
|
117 |
/* get the requested return tuple description */ |
118 |
tupdesc = rsinfo->expectedDesc; |
119 |
rsinfo_ncols = tupdesc->natts; |
120 |
|
121 |
/* |
122 |
* The requested tuple description better match up with the array |
123 |
* we were given. |
124 |
*/ |
125 |
if (rsinfo_ncols != ncols) |
126 |
ereport(ERROR, |
127 |
(errcode(ERRCODE_INVALID_PARAMETER_VALUE), |
128 |
errmsg("invalid input array"), |
129 |
errdetail("Number of elements in array must match number of query specified columns."))); |
130 |
|
131 |
/* OK, use it */ |
132 |
attinmeta = TupleDescGetAttInMetadata(tupdesc); |
133 |
|
134 |
/* Now go to work */ |
135 |
rsinfo->returnMode = SFRM_Materialize; |
136 |
|
137 |
per_query_ctx = fcinfo->flinfo->fn_mcxt; |
138 |
oldcontext = MemoryContextSwitchTo(per_query_ctx); |
139 |
|
140 |
/* initialize our tuplestore */ |
141 |
tupstore = tuplestore_begin_heap(true, false, SortMem); |
142 |
|
143 |
|
144 |
/* take rest of arguments from function */ |
145 |
|
146 |
/* index path */ |
147 |
if (PG_ARGISNULL(0)) { |
148 |
ereport(ERROR, |
149 |
(errcode(ERRCODE_INVALID_PARAMETER_VALUE), |
150 |
errmsg("index path can't be null"), |
151 |
errdetail("Index path must be valid full path to HyperEstraier index"))); |
152 |
} |
153 |
index_path = _textout(PG_GETARG_TEXT_P(0)); |
154 |
|
155 |
/* query string */ |
156 |
if (PG_ARGISNULL(1)) { |
157 |
query = ""; |
158 |
} else { |
159 |
query = _textout(PG_GETARG_TEXT_P(1)); |
160 |
} |
161 |
|
162 |
/* atribute filter */ |
163 |
if (PG_ARGISNULL(2)) { |
164 |
attr = ""; |
165 |
} else { |
166 |
attr = _textout(PG_GETARG_TEXT_P(2)); |
167 |
} |
168 |
|
169 |
/* sort order */ |
170 |
if (PG_ARGISNULL(3)) { |
171 |
order = ""; |
172 |
} else { |
173 |
order = _textout(PG_GETARG_TEXT_P(3)); |
174 |
} |
175 |
|
176 |
|
177 |
/* limit */ |
178 |
if (PG_ARGISNULL(4)) { |
179 |
limit = 0; |
180 |
} else { |
181 |
limit = PG_GETARG_INT32(4); |
182 |
} |
183 |
|
184 |
/* offset */ |
185 |
if (PG_ARGISNULL(5)) { |
186 |
offset = 0; |
187 |
} else { |
188 |
offset = PG_GETARG_INT32(5); |
189 |
} |
190 |
|
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|
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/* open the database */ |
193 |
elog(DEBUG1, "pgest_attr: est_db_open(%s)", index_path); |
194 |
|
195 |
if(!(db = est_db_open(index_path, ESTDBREADER, &ecode))){ |
196 |
ereport(ERROR, (errcode(ERRCODE_INVALID_PARAMETER_VALUE), |
197 |
errmsg("est_db_open: can't open %s: %d", index_path, ecode), |
198 |
errdetail(est_err_msg(ecode)))); |
199 |
} |
200 |
|
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elog(DEBUG1, "pgest_attr: query[%s] attr[%s] limit %d offset %d", query, (PG_ARGISNULL(2) ? "NULL" : attr), limit, offset); |
202 |
|
203 |
/* create a search condition object */ |
204 |
if (!(cond = est_cond_new())) { |
205 |
ereport(ERROR, (errcode(ERRCODE_QUERY_CANCELED), |
206 |
errmsg("pgest_attr: est_cond_new failed"))); |
207 |
} |
208 |
|
209 |
/* set the search phrase to the search condition object */ |
210 |
if (! PG_ARGISNULL(1) && strlen(query) > 0) |
211 |
est_cond_set_phrase(cond, query); |
212 |
|
213 |
/* minimum valid attribute length is 10: @a STREQ a */ |
214 |
if (! PG_ARGISNULL(2) && strlen(attr) >= 10) { |
215 |
elog(DEBUG1,"attributes: %s", attr); |
216 |
cond_add_attr(cond, attr); |
217 |
} |
218 |
|
219 |
/* set the search phrase to the search condition object */ |
220 |
if (! PG_ARGISNULL(3) && strlen(order) > 0) { |
221 |
elog(DEBUG1,"est_cond_set_order(%s)", order); |
222 |
est_cond_set_order(cond, order); |
223 |
} |
224 |
|
225 |
if (limit) { |
226 |
elog(DEBUG1,"est_cond_set_max(%d)", limit + offset); |
227 |
est_cond_set_max(cond, limit + offset); |
228 |
} |
229 |
|
230 |
/* get the result of search */ |
231 |
est_result = est_db_search(db, cond, &resnum, NULL); |
232 |
|
233 |
/* check if results exists */ |
234 |
if ( 0 == resnum ) { |
235 |
elog(INFO, "pgest_attr: no results for: %s", query ); |
236 |
} |
237 |
|
238 |
/* total number of tuples to be returned */ |
239 |
if (limit && limit < resnum) { |
240 |
nrows = limit; |
241 |
} else { |
242 |
nrows = resnum - offset; |
243 |
} |
244 |
|
245 |
|
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elog(DEBUG1, "pgest_attr: found %d hits for %s", resnum, query); |
247 |
|
248 |
values = (char **) palloc(ncols * sizeof(char *)); |
249 |
|
250 |
for (i = 0; i < nrows; i++) |
251 |
{ |
252 |
|
253 |
/* get result from estraier */ |
254 |
if (! ( doc = est_db_get_doc(db, est_result[i + offset], 0)) ) { |
255 |
elog(INFO, "pgest_attr: can't find result %d", i + offset); |
256 |
} else { |
257 |
elog(DEBUG1, "URI: %s\n Title: %s\n", |
258 |
est_doc_attr(doc, "@uri"), |
259 |
est_doc_attr(doc, "@title") |
260 |
); |
261 |
} |
262 |
|
263 |
/* iterate over results */ |
264 |
for (j = 0; j < ncols; j++) |
265 |
{ |
266 |
bool isnull; |
267 |
|
268 |
/* array value of this position */ |
269 |
indx[0] = j + attr_dim_lower_bounds[0]; |
270 |
|
271 |
dvalue = array_ref(attr_arr, attr_ndims, indx, -1, attr_len, attr_byval, attr_align, &isnull); |
272 |
|
273 |
if (!isnull && doc) |
274 |
values[j] = DatumGetCString( |
275 |
attr2text(doc, |
276 |
(char *)DirectFunctionCall1(textout, dvalue) |
277 |
)); |
278 |
else |
279 |
values[j] = NULL; |
280 |
} |
281 |
/* construct the tuple */ |
282 |
tuple = BuildTupleFromCStrings(attinmeta, values); |
283 |
|
284 |
/* now store it */ |
285 |
tuplestore_puttuple(tupstore, tuple); |
286 |
|
287 |
/* delete estraier document object */ |
288 |
if (doc) est_doc_delete(doc); |
289 |
} |
290 |
|
291 |
tuplestore_donestoring(tupstore); |
292 |
rsinfo->setResult = tupstore; |
293 |
|
294 |
/* |
295 |
* SFRM_Materialize mode expects us to return a NULL Datum. The actual |
296 |
* tuples are in our tuplestore and passed back through |
297 |
* rsinfo->setResult. rsinfo->setDesc is set to the tuple description |
298 |
* that we actually used to build our tuples with, so the caller can |
299 |
* verify we did what it was expecting. |
300 |
*/ |
301 |
rsinfo->setDesc = tupdesc; |
302 |
MemoryContextSwitchTo(oldcontext); |
303 |
|
304 |
est_cond_delete(cond); |
305 |
|
306 |
if(!est_db_close(db, &ecode)){ |
307 |
ereport(ERROR, (errcode(ERRCODE_IO_ERROR), |
308 |
errmsg("est_db_close: %d", ecode), |
309 |
errdetail(est_err_msg(ecode)))); |
310 |
} |
311 |
|
312 |
return (Datum) 0; |
313 |
} |
314 |
|
315 |
|
316 |
/* make text var from attr */ |
317 |
char *attr2text(ESTDOC *doc, char *attr) { |
318 |
char *val; |
319 |
const char *attrval; |
320 |
int len; |
321 |
int attrlen; |
322 |
|
323 |
if (! doc) return (Datum) NULL; |
324 |
|
325 |
elog(DEBUG1, "doc: %p, attr: %s", doc, attr); |
326 |
|
327 |
if ( (attrval = est_doc_attr(doc, attr)) && (attrlen = strlen(attrval)) ) { |
328 |
val = (char *) palloc(attrlen * sizeof(char)); |
329 |
} else { |
330 |
return (Datum) NULL; |
331 |
} |
332 |
|
333 |
len = strlen(attrval); |
334 |
elog(DEBUG1, "attr2text(%s) = '%s' %d bytes", attr, attrval, len); |
335 |
|
336 |
len++; |
337 |
len *= sizeof(char); |
338 |
|
339 |
elog(DEBUG2, "palloc(%d)", len); |
340 |
|
341 |
val = palloc(len); |
342 |
|
343 |
memset(val, 0, len); |
344 |
strncpy(val, attrval, len); |
345 |
|
346 |
elog(DEBUG2, "val=%s", val); |
347 |
|
348 |
return val; |
349 |
} |
350 |
|
351 |
/* |
352 |
* variation on theme: use node API which doesn't open index on |
353 |
* every query which is much faster for large indexes |
354 |
* |
355 |
*/ |
356 |
|
357 |
/* select * from pgest( */ |
358 |
#define _arg_node_uri 0 |
359 |
#define _arg_login 1 |
360 |
#define _arg_passwd 2 |
361 |
#define _arg_depth 3 |
362 |
#define _arg_query 4 |
363 |
#define _arg_attr 5 |
364 |
#define _arg_order 6 |
365 |
#define _arg_limit 7 |
366 |
#define _arg_offset 8 |
367 |
#define _arg_attr_array 9 |
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 |
CBMAP *hints; |
402 |
int resnum = 0; |
403 |
int limit = 0; |
404 |
int offset = 0; |
405 |
int depth = 0; |
406 |
|
407 |
char *node_url; |
408 |
char *user, *passwd; |
409 |
char *query; |
410 |
char *attr; |
411 |
char *order; |
412 |
|
413 |
|
414 |
/* only allow 1D input array */ |
415 |
if (attr_ndims == 1) |
416 |
{ |
417 |
ncols = attr_dim_counts[0]; |
418 |
} |
419 |
else |
420 |
ereport(ERROR, |
421 |
(errcode(ERRCODE_INVALID_PARAMETER_VALUE), |
422 |
errmsg("invalid input array"), |
423 |
errdetail("Input array must have 1 dimension"))); |
424 |
|
425 |
/* check to see if caller supports us returning a tuplestore */ |
426 |
if (!rsinfo || !(rsinfo->allowedModes & SFRM_Materialize)) |
427 |
ereport(ERROR, |
428 |
(errcode(ERRCODE_SYNTAX_ERROR), |
429 |
errmsg("materialize mode required, but it is not " \ |
430 |
"allowed in this context"))); |
431 |
|
432 |
/* get info about element type needed to construct the array */ |
433 |
get_typlenbyvalalign(attr_element_type, &attr_len, &attr_byval, &attr_align); |
434 |
|
435 |
/* get the requested return tuple description */ |
436 |
tupdesc = rsinfo->expectedDesc; |
437 |
rsinfo_ncols = tupdesc->natts; |
438 |
|
439 |
/* |
440 |
* The requested tuple description better match up with the array |
441 |
* we were given. |
442 |
*/ |
443 |
if (rsinfo_ncols != ncols) |
444 |
ereport(ERROR, |
445 |
(errcode(ERRCODE_INVALID_PARAMETER_VALUE), |
446 |
errmsg("invalid input array"), |
447 |
errdetail("Number of elements in array must match number of query specified columns."))); |
448 |
|
449 |
/* OK, use it */ |
450 |
attinmeta = TupleDescGetAttInMetadata(tupdesc); |
451 |
|
452 |
/* Now go to work */ |
453 |
rsinfo->returnMode = SFRM_Materialize; |
454 |
|
455 |
per_query_ctx = fcinfo->flinfo->fn_mcxt; |
456 |
oldcontext = MemoryContextSwitchTo(per_query_ctx); |
457 |
|
458 |
/* initialize our tuplestore */ |
459 |
tupstore = tuplestore_begin_heap(true, false, SortMem); |
460 |
|
461 |
|
462 |
/* take rest of arguments from function */ |
463 |
|
464 |
/* node URL */ |
465 |
if (PG_ARGISNULL(_arg_node_uri)) { |
466 |
ereport(ERROR, |
467 |
(errcode(ERRCODE_INVALID_PARAMETER_VALUE), |
468 |
errmsg("node URL can't be null"), |
469 |
errdetail("Node URL must be valid URL to HyperEstraier node"))); |
470 |
} |
471 |
node_url = _textout(PG_GETARG_TEXT_P(_arg_node_uri)); |
472 |
|
473 |
/* login and password */ |
474 |
if (PG_ARGISNULL(_arg_login) || PG_ARGISNULL(_arg_passwd)) { |
475 |
ereport(ERROR, |
476 |
(errcode(ERRCODE_INVALID_PARAMETER_VALUE), |
477 |
errmsg("username and password can't be NULL"), |
478 |
errdetail("You must specify valid username and password to HyperEstraier node"))); |
479 |
} |
480 |
user = _textout(PG_GETARG_TEXT_P(_arg_login)); |
481 |
passwd = _textout(PG_GETARG_TEXT_P(_arg_passwd)); |
482 |
|
483 |
/* depth of search */ |
484 |
if (PG_ARGISNULL(_arg_depth)) { |
485 |
depth = 0; |
486 |
} else { |
487 |
depth = PG_GETARG_INT32(_arg_depth); |
488 |
} |
489 |
|
490 |
/* query string */ |
491 |
if (PG_ARGISNULL(_arg_query)) { |
492 |
query = ""; |
493 |
} else { |
494 |
query = _textout(PG_GETARG_TEXT_P(_arg_query)); |
495 |
} |
496 |
|
497 |
/* atribute filter */ |
498 |
if (PG_ARGISNULL(_arg_attr)) { |
499 |
attr = ""; |
500 |
} else { |
501 |
attr = _textout(PG_GETARG_TEXT_P(_arg_attr)); |
502 |
} |
503 |
|
504 |
/* sort order */ |
505 |
if (PG_ARGISNULL(_arg_order)) { |
506 |
order = ""; |
507 |
} else { |
508 |
order = _textout(PG_GETARG_TEXT_P(_arg_order)); |
509 |
} |
510 |
|
511 |
|
512 |
/* limit */ |
513 |
if (PG_ARGISNULL(_arg_limit)) { |
514 |
limit = 0; |
515 |
} else { |
516 |
limit = PG_GETARG_INT32(_arg_limit); |
517 |
} |
518 |
|
519 |
/* offset */ |
520 |
if (PG_ARGISNULL(_arg_offset)) { |
521 |
offset = 0; |
522 |
} else { |
523 |
offset = PG_GETARG_INT32(_arg_offset); |
524 |
} |
525 |
|
526 |
/* initialize the network environment */ |
527 |
if(!est_init_net_env()){ |
528 |
ereport(ERROR, (errcode(ERRCODE_QUERY_CANCELED), |
529 |
errmsg("pgest_node: can't create network enviroment"))); |
530 |
} |
531 |
|
532 |
/* create the node connection object */ |
533 |
elog(DEBUG1, "pgest_node: est_node_new(%s) as %s", node_url, user); |
534 |
node = est_node_new(node_url); |
535 |
est_node_set_auth(node, user, passwd); |
536 |
|
537 |
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); |
538 |
|
539 |
/* create a search condition object */ |
540 |
if (!(cond = est_cond_new())) { |
541 |
ereport(ERROR, (errcode(ERRCODE_QUERY_CANCELED), |
542 |
errmsg("pgest_node: est_cond_new failed"))); |
543 |
} |
544 |
|
545 |
/* set the search phrase to the search condition object */ |
546 |
if (! PG_ARGISNULL(_arg_query) && strlen(query) > 0) |
547 |
est_cond_set_phrase(cond, query); |
548 |
|
549 |
/* minimum valid attribute length is 10: @a STREQ a */ |
550 |
if (! PG_ARGISNULL(_arg_attr) && strlen(attr) >= 10) { |
551 |
elog(DEBUG1,"attributes: %s", attr); |
552 |
cond_add_attr(cond, attr); |
553 |
} |
554 |
|
555 |
/* set the search phrase to the search condition object */ |
556 |
if (! PG_ARGISNULL(_arg_order) && strlen(order) > 0) { |
557 |
elog(DEBUG1,"est_cond_set_order(%s)", order); |
558 |
est_cond_set_order(cond, order); |
559 |
} |
560 |
|
561 |
if (limit) { |
562 |
elog(DEBUG1,"est_cond_set_max(%d)", limit + offset); |
563 |
est_cond_set_max(cond, limit + offset); |
564 |
} |
565 |
|
566 |
if (offset) { |
567 |
elog(DEBUG1,"est_cond_set_skip(%d)", offset); |
568 |
est_cond_set_skip(cond, offset); |
569 |
} |
570 |
|
571 |
/* get the result of search */ |
572 |
nres = est_node_search(node, cond, depth); |
573 |
|
574 |
if (! nres) { |
575 |
int status = est_node_status(node); |
576 |
est_cond_delete(cond); |
577 |
est_node_delete(node); |
578 |
est_free_net_env(); |
579 |
ereport(ERROR, (errcode(ERRCODE_QUERY_CANCELED), |
580 |
errmsg("pgest_node: search failed, node status %d", status))); |
581 |
} |
582 |
|
583 |
/* get number of results */ |
584 |
resnum = est_noderes_doc_num(nres); |
585 |
|
586 |
/* check if results exists */ |
587 |
if ( 0 == resnum ) { |
588 |
elog(INFO, "pgest_node: no results for: %s", query ); |
589 |
} |
590 |
|
591 |
/* total number of tuples to be returned */ |
592 |
if (limit && limit < resnum) { |
593 |
nrows = limit; |
594 |
} else { |
595 |
nrows = resnum - offset; |
596 |
} |
597 |
|
598 |
/* get hints */ |
599 |
hints = est_noderes_hints(nres); |
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) )) { |
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 |
char *attr; /* current attribute name */ |
624 |
char *hint; /* position of current hint in attribute */ |
625 |
char *hint_val; |
626 |
|
627 |
/* array value of this position */ |
628 |
indx[0] = j + attr_dim_lower_bounds[0]; |
629 |
|
630 |
dvalue = array_ref(attr_arr, attr_ndims, indx, -1, attr_len, attr_byval, attr_align, &isnull); |
631 |
attr = (char *)DirectFunctionCall1(textout, dvalue); |
632 |
|
633 |
if (!isnull && (hint = strstr(attr, HINTS_PREFIX)) != NULL) { |
634 |
/* skip HINTS. prefix */ |
635 |
hint += strlen(HINTS_PREFIX); |
636 |
|
637 |
hint_val = cbmapget(hints, hint, -1, NULL); |
638 |
elog(DEBUG2, "hint %s = %s", hint, hint_val); |
639 |
|
640 |
if (hint_val != NULL) { |
641 |
values[j] = DatumGetCString( hint_val ); |
642 |
} else { |
643 |
elog(INFO, "can't get hint in results: %s", hint); |
644 |
values[j] = NULL; |
645 |
} |
646 |
} else if (!isnull && rdoc) |
647 |
values[j] = DatumGetCString( node_attr2text(rdoc, attr) ); |
648 |
else |
649 |
values[j] = NULL; |
650 |
} |
651 |
/* construct the tuple */ |
652 |
tuple = BuildTupleFromCStrings(attinmeta, values); |
653 |
|
654 |
/* now store it */ |
655 |
tuplestore_puttuple(tupstore, tuple); |
656 |
|
657 |
} |
658 |
|
659 |
tuplestore_donestoring(tupstore); |
660 |
rsinfo->setResult = tupstore; |
661 |
|
662 |
/* |
663 |
* SFRM_Materialize mode expects us to return a NULL Datum. The actual |
664 |
* tuples are in our tuplestore and passed back through |
665 |
* rsinfo->setResult. rsinfo->setDesc is set to the tuple description |
666 |
* that we actually used to build our tuples with, so the caller can |
667 |
* verify we did what it was expecting. |
668 |
*/ |
669 |
rsinfo->setDesc = tupdesc; |
670 |
MemoryContextSwitchTo(oldcontext); |
671 |
|
672 |
/* delete the node result object */ |
673 |
est_noderes_delete(nres); |
674 |
|
675 |
/* destroy the search condition object */ |
676 |
est_cond_delete(cond); |
677 |
|
678 |
/* destroy the node object */ |
679 |
est_node_delete(node); |
680 |
|
681 |
/* free the networking environment */ |
682 |
est_free_net_env(); |
683 |
|
684 |
return (Datum) 0; |
685 |
} |
686 |
|
687 |
/* make text var from node attr */ |
688 |
char *node_attr2text(ESTRESDOC *rdoc, char *attr) { |
689 |
char *val; |
690 |
const char *attrval; |
691 |
int len; |
692 |
int attrlen; |
693 |
|
694 |
if (! rdoc) return (Datum) NULL; |
695 |
|
696 |
elog(DEBUG1, "doc: %p, attr: %s", rdoc, attr); |
697 |
|
698 |
if ( (attrval = est_resdoc_attr(rdoc, attr)) && (attrlen = strlen(attrval)) ) { |
699 |
val = (char *) palloc(attrlen * sizeof(char)); |
700 |
} else { |
701 |
return (Datum) NULL; |
702 |
} |
703 |
|
704 |
len = strlen(attrval); |
705 |
elog(DEBUG1, "node_attr2text(%s) = '%s' %d bytes", attr, attrval, len); |
706 |
|
707 |
len++; |
708 |
len *= sizeof(char); |
709 |
|
710 |
elog(DEBUG2, "palloc(%d)", len); |
711 |
|
712 |
val = palloc(len); |
713 |
|
714 |
memset(val, 0, len); |
715 |
strncpy(val, attrval, len); |
716 |
|
717 |
elog(DEBUG2, "val=%s", val); |
718 |
|
719 |
return val; |
720 |
} |
721 |
|
722 |
/* parse attributes and add them to confition */ |
723 |
void cond_add_attr(ESTCOND *cond, char *attr) { |
724 |
char *next; |
725 |
char *curr_attr; |
726 |
while ( strlen(attr) > 0 ) { |
727 |
printf("len [%s] = %d\n", attr, strlen(attr)); |
728 |
if ((next = strstr(attr, ATTR_DELIMITER)) != NULL) { |
729 |
curr_attr = palloc( next - attr + 1 ); |
730 |
memcpy(curr_attr, attr, next-attr); |
731 |
curr_attr[next-attr] = '\0'; |
732 |
next += strlen(ATTR_DELIMITER); |
733 |
} else { |
734 |
next = ""; |
735 |
curr_attr = attr; |
736 |
} |
737 |
elog(DEBUG1, "est_cond_add_attr(%s)", curr_attr); |
738 |
est_cond_add_attr(cond, curr_attr); |
739 |
attr = next; |
740 |
} |
741 |
} |
742 |
|
743 |
/* trigger to keep data in Hyper Estraier index up-to-date */ |
744 |
/* CREATE FUNCTION pgest_trigger() RETURNS TRIGGER AS ... */ |
745 |
|
746 |
/* |
747 |
* UPDATE, INSERT and DELETE triggers are like this: |
748 |
|
749 |
CREATE TRIGGER pgest_trigger_update AFTER UPDATE |
750 |
ON table_name FOR EACH ROW |
751 |
EXECUTE PROCEDURE pgest_trigger('http://localhost:1978/node/trivia','admin','admin', |
752 |
'name_of_pk', 'column', 'another_column', 'and_so_on' |
753 |
) |
754 |
|
755 |
*/ |
756 |
|
757 |
PG_FUNCTION_INFO_V1(pgest_trigger); |
758 |
Datum pgest_trigger(PG_FUNCTION_ARGS) { |
759 |
|
760 |
TriggerData *data; |
761 |
TupleDesc tupdesc; |
762 |
HeapTuple ret; |
763 |
|
764 |
char **args; |
765 |
char *keycol = NULL; |
766 |
char *key = NULL; |
767 |
char *col_data = NULL; |
768 |
int knumber; |
769 |
int i; |
770 |
int create_doc = 0; |
771 |
|
772 |
ESTNODE *node; |
773 |
ESTDOC *doc; |
774 |
|
775 |
|
776 |
|
777 |
if (! CALLED_AS_TRIGGER(fcinfo)) { |
778 |
elog(ERROR, "pgest_trigger() must be called as a trigger"); |
779 |
} |
780 |
|
781 |
data = (TriggerData *) fcinfo->context; |
782 |
|
783 |
if (data->tg_trigger->tgnargs < 5) |
784 |
elog(ERROR, "pgest_trigger() requires at least 5 parameters ('http://localhost:1978/node/trivia', 'user', 'passwd', 'pk_column', 'column', ... )"); |
785 |
|
786 |
args = data->tg_trigger->tgargs; |
787 |
keycol = args[3]; |
788 |
|
789 |
tupdesc = data->tg_relation->rd_att; |
790 |
|
791 |
knumber = SPI_fnumber(tupdesc, keycol); |
792 |
key = SPI_getvalue(data->tg_trigtuple, tupdesc, knumber); |
793 |
|
794 |
|
795 |
/* initialize the network environment */ |
796 |
if( ! est_init_net_env() ) |
797 |
elog(ERROR, "pgest_trigger: network is unavailable\n"); |
798 |
|
799 |
/* create and configure the node connection object */ |
800 |
node = est_node_new( args[0] ); |
801 |
est_node_set_auth(node, args[1], args[2]); |
802 |
|
803 |
|
804 |
if (TRIGGER_FIRED_BY_INSERT(data->tg_event)) { |
805 |
/* There is no old data */ |
806 |
ret = data->tg_trigtuple; |
807 |
|
808 |
create_doc++; |
809 |
|
810 |
} else if (TRIGGER_FIRED_BY_UPDATE(data->tg_event)) { |
811 |
ret = data->tg_newtuple; |
812 |
|
813 |
create_doc++; |
814 |
|
815 |
} else if (TRIGGER_FIRED_BY_DELETE(data->tg_event)) { |
816 |
/* There is no new data */ |
817 |
ret = data->tg_trigtuple; |
818 |
|
819 |
if (! est_node_out_doc_by_uri(node, key) ) |
820 |
elog(ERROR, "est_node_doc_by_uri(%s): %d\n", key, est_node_status(node)); |
821 |
|
822 |
} else { |
823 |
elog(ERROR, "pgest_trigger() not called from INSERT/UPDATE/DELETE"); |
824 |
} |
825 |
|
826 |
if ( create_doc ) { |
827 |
|
828 |
/* create a document object */ |
829 |
doc = est_doc_new(); |
830 |
est_doc_add_attr(doc, "@uri", key); |
831 |
|
832 |
elog(DEBUG1, "est_doc_new @uri=%s", key); |
833 |
|
834 |
for( i = 4; i < data->tg_trigger->tgnargs; i++ ) { |
835 |
|
836 |
col_data = SPI_getvalue(ret, tupdesc, SPI_fnumber(tupdesc, args[i])); |
837 |
|
838 |
if (data) { |
839 |
elog(DEBUG1, " + %s = %s", args[i], col_data); |
840 |
est_doc_add_attr(doc, args[i], col_data); |
841 |
est_doc_add_text(doc, col_data); |
842 |
} |
843 |
|
844 |
} |
845 |
|
846 |
/* register the document object to the node */ |
847 |
if( ! est_node_put_doc(node, doc) ) |
848 |
elog(ERROR, "est_node_put_doc: %d\n", est_node_status(node)); |
849 |
|
850 |
/* destroy the document object */ |
851 |
est_doc_delete(doc); |
852 |
|
853 |
} |
854 |
|
855 |
/* destroy the node object */ |
856 |
est_node_delete(node); |
857 |
/* free the networking environment */ |
858 |
est_free_net_env(); |
859 |
|
860 |
|
861 |
return PointerGetDatum(ret); |
862 |
} |
863 |
|