| 1 |
/* |
| 2 |
* integrate swish-e into PostgreSQL |
| 3 |
* |
| 4 |
* Dobrica Pavlinusic <dpavlin@rot13.org> 2005-02-18 |
| 5 |
* |
| 6 |
* TODO: |
| 7 |
* - check null input using PG_ARGISNULL before using PG_GETARG_xxxx |
| 8 |
* - support composite type arguments |
| 9 |
* - split error_or_abort |
| 10 |
* - use getResultPropValue not SwishResultPropertyStr |
| 11 |
* - fix everything about pgswish_arr which is broken |
| 12 |
* |
| 13 |
* NOTES: |
| 14 |
* - clear structures with memset to support hash indexes (who whould like |
| 15 |
* to create hash index on table returned from function?) |
| 16 |
* - number of returned rows is set by PostgreSQL evaluator, see: |
| 17 |
* http://archives.postgresql.org/pgsql-hackers/2005-02/msg00546.php |
| 18 |
* |
| 19 |
* Based on: |
| 20 |
* - C example from PostgreSQL documentation (BSD licence) |
| 21 |
* - swish-e example src/libtest.c (GPL) |
| 22 |
* - _textin/_textout from pgcurl.c (LGPL) |
| 23 |
* |
| 24 |
* This code is licenced under GPL |
| 25 |
*/ |
| 26 |
|
| 27 |
#include "postgres.h" |
| 28 |
#include "fmgr.h" |
| 29 |
#include "funcapi.h" |
| 30 |
#include "utils/builtins.h" |
| 31 |
#include "utils/array.h" |
| 32 |
#include "miscadmin.h" |
| 33 |
#include <swish-e.h> |
| 34 |
|
| 35 |
#define _textin(str) DirectFunctionCall1(textin, CStringGetDatum(str)) |
| 36 |
#define _textout(str) DatumGetPointer(DirectFunctionCall1(textout, PointerGetDatum(str))) |
| 37 |
#define GET_STR(textp) DatumGetCString(DirectFunctionCall1(textout, PointerGetDatum(textp))) |
| 38 |
#define GET_TEXT(cstrp) DatumGetTextP(DirectFunctionCall1(textin, CStringGetDatum(cstrp))) |
| 39 |
|
| 40 |
/* Globals */ |
| 41 |
static SW_HANDLE swish_handle = NULL; /* Database handle */ |
| 42 |
static SW_SEARCH search = NULL; /* search handle -- search parameters */ |
| 43 |
static SW_RESULTS swish_results = NULL; /* results handle -- list of results */ |
| 44 |
static SW_RESULT *sw_res = NULL; /* one row from swish-e results */ |
| 45 |
|
| 46 |
/* define PostgreSQL v1 function */ |
| 47 |
PG_FUNCTION_INFO_V1(pgswish); |
| 48 |
Datum pgswish(PG_FUNCTION_ARGS) { |
| 49 |
|
| 50 |
FuncCallContext *funcctx; |
| 51 |
int call_cntr; |
| 52 |
int max_calls; |
| 53 |
TupleDesc tupdesc; |
| 54 |
TupleTableSlot *slot; |
| 55 |
AttInMetadata *attinmeta; |
| 56 |
char *index_path; |
| 57 |
char *query; |
| 58 |
FILE *logfh; |
| 59 |
|
| 60 |
/* stuff done only on the first call of the function */ |
| 61 |
if (SRF_IS_FIRSTCALL()) { |
| 62 |
MemoryContext oldcontext; |
| 63 |
|
| 64 |
/* take arguments from function */ |
| 65 |
//index_path = _textout(PG_GETARG_TEXT_P(0)); |
| 66 |
index_path = _textout(PG_GETARG_TEXT_P(0)); |
| 67 |
query = _textout(PG_GETARG_TEXT_P(1)); |
| 68 |
|
| 69 |
/* create a function context for cross-call persistence */ |
| 70 |
funcctx = SRF_FIRSTCALL_INIT(); |
| 71 |
|
| 72 |
/* switch to memory context appropriate for multiple function calls */ |
| 73 |
oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx); |
| 74 |
|
| 75 |
|
| 76 |
/* Send any errors or warnings to log, as well as |
| 77 |
* STDOUT and STDERR (just to be sure) */ |
| 78 |
if ( logfh = fopen("/tmp/pgswish.log", "a") ) { |
| 79 |
set_error_handle( logfh ); |
| 80 |
elog(INFO, "loggin swish-e errors to /tmp/pgswish.log"); |
| 81 |
/* redirect STDOUT and STDERR to log */ |
| 82 |
dup2(1, logfh); |
| 83 |
dup2(2, logfh); |
| 84 |
} else { |
| 85 |
elog(INFO, "can't open /tmp/pgswish.log -- errors from swish-e won't be cought and may result in back-end crashes!"); |
| 86 |
} |
| 87 |
|
| 88 |
elog(INFO, "pgswish: SwishInit(%s)", index_path); |
| 89 |
|
| 90 |
swish_handle = SwishInit( index_path ); |
| 91 |
|
| 92 |
if ( SwishError( swish_handle ) ) |
| 93 |
elog(INFO, "pgswish: SwishInit(%s) failed: %s", index_path, SwishErrorString( swish_handle )); |
| 94 |
|
| 95 |
elog(INFO, "handle: %08x", swish_handle); |
| 96 |
|
| 97 |
if (! swish_handle) { |
| 98 |
elog(ERROR, "pgswish: can't open %s", index_path); |
| 99 |
SRF_RETURN_DONE(funcctx); |
| 100 |
} |
| 101 |
|
| 102 |
if (error_or_abort( swish_handle )) SRF_RETURN_DONE(funcctx); |
| 103 |
/* set ranking scheme. default is 0 */ |
| 104 |
SwishRankScheme( swish_handle, 0 ); |
| 105 |
if (error_or_abort( swish_handle )) SRF_RETURN_DONE(funcctx); |
| 106 |
|
| 107 |
elog(INFO, "pgswish: SwishQuery(%s)", query); |
| 108 |
/* Here's a short-cut to searching that creates a search object and searches at the same time */ |
| 109 |
swish_results = SwishQuery( swish_handle, query); |
| 110 |
if (error_or_abort( swish_handle )) SRF_RETURN_DONE(funcctx); |
| 111 |
|
| 112 |
/* total number of tuples to be returned */ |
| 113 |
funcctx->max_calls = SwishHits( swish_results ); |
| 114 |
|
| 115 |
/* check if results exists */ |
| 116 |
if ( 0 == funcctx->max_calls ) |
| 117 |
elog(INFO, "no results for: %s", query ); |
| 118 |
|
| 119 |
elog(INFO, "pgswish: SwishHits = %d", funcctx->max_calls); |
| 120 |
|
| 121 |
/* Build a tuple description for a __pgswish tuple */ |
| 122 |
tupdesc = RelationNameGetTupleDesc("__pgswish"); |
| 123 |
|
| 124 |
/* allocate a slot for a tuple with this tupdesc */ |
| 125 |
slot = TupleDescGetSlot(tupdesc); |
| 126 |
|
| 127 |
/* assign slot to function context */ |
| 128 |
funcctx->slot = slot; |
| 129 |
|
| 130 |
/* |
| 131 |
* generate attribute metadata needed later to produce tuples from raw |
| 132 |
* C strings |
| 133 |
*/ |
| 134 |
attinmeta = TupleDescGetAttInMetadata(tupdesc); |
| 135 |
funcctx->attinmeta = attinmeta; |
| 136 |
|
| 137 |
MemoryContextSwitchTo(oldcontext); |
| 138 |
|
| 139 |
elog(INFO, "SRF_IS_FIRSTCALL done"); |
| 140 |
} |
| 141 |
|
| 142 |
/* stuff done on every call of the function */ |
| 143 |
funcctx = SRF_PERCALL_SETUP(); |
| 144 |
|
| 145 |
call_cntr = funcctx->call_cntr; |
| 146 |
max_calls = funcctx->max_calls; |
| 147 |
slot = funcctx->slot; |
| 148 |
attinmeta = funcctx->attinmeta; |
| 149 |
|
| 150 |
if (call_cntr < max_calls) { |
| 151 |
char **values; |
| 152 |
HeapTuple tuple; |
| 153 |
Datum result; |
| 154 |
|
| 155 |
elog(INFO, "pgswish: loop count %d", call_cntr); |
| 156 |
|
| 157 |
if (! swish_results) { |
| 158 |
elog(ERROR, "pgswish: no swish-e results"); |
| 159 |
SRF_RETURN_DONE(funcctx); |
| 160 |
} |
| 161 |
|
| 162 |
elog(DEBUG1, "pgswish: check for swish-e error"); |
| 163 |
if (error_or_abort( swish_handle )) SRF_RETURN_DONE(funcctx); |
| 164 |
|
| 165 |
/* |
| 166 |
* Prepare a values array for storage in our slot. |
| 167 |
* This should be an array of C strings which will |
| 168 |
* be processed later by the type input functions. |
| 169 |
*/ |
| 170 |
|
| 171 |
sw_res = SwishNextResult( swish_results ); |
| 172 |
if (! sw_res) { |
| 173 |
elog(ERROR, "pgswish: swish-e sort result list: %d rows expected %d", call_cntr, max_calls - 1); |
| 174 |
Free_Results_Object( swish_results ); |
| 175 |
Free_Search_Object( search ); |
| 176 |
SRF_RETURN_DONE(funcctx); |
| 177 |
} |
| 178 |
|
| 179 |
elog(INFO, "Path: %s\n Rank: %lu\n Size: %lu\n Title: %s\n Index: %s\n Modified: %s\n Record #: %lu\n File #: %lu\n\n", |
| 180 |
SwishResultPropertyStr ( sw_res, "swishdocpath" ), |
| 181 |
SwishResultPropertyULong ( sw_res, "swishrank" ), |
| 182 |
SwishResultPropertyULong ( sw_res, "swishdocsize" ), |
| 183 |
SwishResultPropertyStr ( sw_res, "swishtitle"), |
| 184 |
SwishResultPropertyStr ( sw_res, "swishdbfile" ), |
| 185 |
SwishResultPropertyStr ( sw_res, "swishlastmodified" ), |
| 186 |
SwishResultPropertyULong ( sw_res, "swishreccount" ), /* can figure this out in loop, of course */ |
| 187 |
SwishResultPropertyULong ( sw_res, "swishfilenum" ) |
| 188 |
); |
| 189 |
|
| 190 |
values = (char **) palloc(4 * sizeof(char *)); |
| 191 |
|
| 192 |
values[0] = prop2int( sw_res, "swishrank" ); |
| 193 |
values[1] = prop2text( sw_res, "swishdocpath" ); |
| 194 |
values[2] = prop2text( sw_res, "swishtitle" ); |
| 195 |
values[3] = prop2int( sw_res, "swishdocsize" ); |
| 196 |
|
| 197 |
/* |
| 198 |
values[0] = (char *) palloc(16 * sizeof(char)); |
| 199 |
snprintf(values[0], 16, "%d", 1); |
| 200 |
values[1] = (char *) palloc(16 * sizeof(char)); |
| 201 |
snprintf(values[1], 16, "%d", 2); |
| 202 |
values[2] = (char *) palloc(16 * sizeof(char)); |
| 203 |
snprintf(values[2], 16, "%d", 3); |
| 204 |
values[3] = (char *) palloc(16 * sizeof(char)); |
| 205 |
snprintf(values[3], 16, "%d", 4); |
| 206 |
*/ |
| 207 |
|
| 208 |
/* build a tuple */ |
| 209 |
tuple = BuildTupleFromCStrings(attinmeta, values); |
| 210 |
|
| 211 |
/* make the tuple into a datum */ |
| 212 |
result = TupleGetDatum(slot, tuple); |
| 213 |
|
| 214 |
/* clean up ? */ |
| 215 |
pfree(values[0]); |
| 216 |
pfree(values[1]); |
| 217 |
pfree(values[2]); |
| 218 |
pfree(values[3]); |
| 219 |
pfree(values); |
| 220 |
|
| 221 |
elog(DEBUG1, "row: %s|%s|%s|%s",values[0],values[1],values[2],values[3]); |
| 222 |
|
| 223 |
SRF_RETURN_NEXT(funcctx, result); |
| 224 |
} else { |
| 225 |
elog(INFO, "loop over"); |
| 226 |
|
| 227 |
/* free swish object and close */ |
| 228 |
Free_Search_Object( search ); |
| 229 |
SwishClose( swish_handle ); |
| 230 |
|
| 231 |
/* do when there is no more left */ |
| 232 |
SRF_RETURN_DONE(funcctx); |
| 233 |
} |
| 234 |
} |
| 235 |
|
| 236 |
|
| 237 |
/* |
| 238 |
* new function with support for property selection |
| 239 |
*/ |
| 240 |
|
| 241 |
PG_FUNCTION_INFO_V1(pgswish_arr); |
| 242 |
Datum pgswish_arr(PG_FUNCTION_ARGS) |
| 243 |
{ |
| 244 |
ArrayType *prop_arr = PG_GETARG_ARRAYTYPE_P(5); |
| 245 |
Oid prop_element_type = ARR_ELEMTYPE(prop_arr); |
| 246 |
int prop_ndims = ARR_NDIM(prop_arr); |
| 247 |
int *prop_dim_counts = ARR_DIMS(prop_arr); |
| 248 |
int *prop_dim_lower_bounds = ARR_LBOUND(prop_arr); |
| 249 |
int ncols = 0; |
| 250 |
int nrows = 0; |
| 251 |
int indx[MAXDIM]; |
| 252 |
int16 prop_len; |
| 253 |
bool prop_byval; |
| 254 |
char prop_align; |
| 255 |
ReturnSetInfo *rsinfo = (ReturnSetInfo *) fcinfo->resultinfo; |
| 256 |
AttInMetadata *attinmeta; |
| 257 |
TupleDesc tupdesc; |
| 258 |
Tuplestorestate *tupstore = NULL; |
| 259 |
HeapTuple tuple; |
| 260 |
MemoryContext per_query_ctx; |
| 261 |
MemoryContext oldcontext; |
| 262 |
Datum dvalue; |
| 263 |
char **values; |
| 264 |
int rsinfo_ncols; |
| 265 |
int i, j; |
| 266 |
/* swish-e */ |
| 267 |
FILE *logfh; |
| 268 |
int resnum; |
| 269 |
int limit = 0; |
| 270 |
int offset = 0; |
| 271 |
|
| 272 |
char *index_path; |
| 273 |
char *query; |
| 274 |
char *attr; |
| 275 |
|
| 276 |
|
| 277 |
/* only allow 1D input array */ |
| 278 |
if (prop_ndims == 1) |
| 279 |
{ |
| 280 |
ncols = prop_dim_counts[0]; |
| 281 |
} |
| 282 |
else |
| 283 |
ereport(ERROR, |
| 284 |
(errcode(ERRCODE_INVALID_PARAMETER_VALUE), |
| 285 |
errmsg("invalid input array"), |
| 286 |
errdetail("Input array must have 1 dimension"))); |
| 287 |
|
| 288 |
/* check to see if caller supports us returning a tuplestore */ |
| 289 |
if (!rsinfo || !(rsinfo->allowedModes & SFRM_Materialize)) |
| 290 |
ereport(ERROR, |
| 291 |
(errcode(ERRCODE_SYNTAX_ERROR), |
| 292 |
errmsg("materialize mode required, but it is not " \ |
| 293 |
"allowed in this context"))); |
| 294 |
|
| 295 |
/* get info about element type needed to construct the array */ |
| 296 |
get_typlenbyvalalign(prop_element_type, &prop_len, &prop_byval, &prop_align); |
| 297 |
|
| 298 |
/* get the requested return tuple description */ |
| 299 |
tupdesc = rsinfo->expectedDesc; |
| 300 |
rsinfo_ncols = tupdesc->natts; |
| 301 |
|
| 302 |
/* |
| 303 |
* The requested tuple description better match up with the array |
| 304 |
* we were given. |
| 305 |
*/ |
| 306 |
if (rsinfo_ncols != ncols) |
| 307 |
ereport(ERROR, |
| 308 |
(errcode(ERRCODE_INVALID_PARAMETER_VALUE), |
| 309 |
errmsg("invalid input array"), |
| 310 |
errdetail("Number of elements in array must match number of query specified columns."))); |
| 311 |
|
| 312 |
/* OK, use it */ |
| 313 |
attinmeta = TupleDescGetAttInMetadata(tupdesc); |
| 314 |
|
| 315 |
/* Now go to work */ |
| 316 |
rsinfo->returnMode = SFRM_Materialize; |
| 317 |
|
| 318 |
per_query_ctx = fcinfo->flinfo->fn_mcxt; |
| 319 |
oldcontext = MemoryContextSwitchTo(per_query_ctx); |
| 320 |
|
| 321 |
/* initialize our tuplestore */ |
| 322 |
tupstore = tuplestore_begin_heap(true, false, SortMem); |
| 323 |
|
| 324 |
|
| 325 |
/* take rest of arguments from function */ |
| 326 |
|
| 327 |
/* index path */ |
| 328 |
if (PG_ARGISNULL(0)) { |
| 329 |
ereport(ERROR, |
| 330 |
(errcode(ERRCODE_INVALID_PARAMETER_VALUE), |
| 331 |
errmsg("index path can't be null"), |
| 332 |
errdetail("Index path must be valid full path to swish-e index"))); |
| 333 |
} |
| 334 |
index_path = _textout(PG_GETARG_TEXT_P(0)); |
| 335 |
|
| 336 |
/* query string */ |
| 337 |
if (PG_ARGISNULL(0)) { |
| 338 |
query = ""; |
| 339 |
} else { |
| 340 |
query = _textout(PG_GETARG_TEXT_P(1)); |
| 341 |
} |
| 342 |
|
| 343 |
/* atribute filter */ |
| 344 |
if (PG_ARGISNULL(2)) { |
| 345 |
attr = ""; |
| 346 |
} else { |
| 347 |
attr = _textout(PG_GETARG_TEXT_P(2)); |
| 348 |
} |
| 349 |
|
| 350 |
/* limit */ |
| 351 |
if (PG_ARGISNULL(3)) { |
| 352 |
limit = 0; |
| 353 |
} else { |
| 354 |
limit = PG_GETARG_INT32(3); |
| 355 |
} |
| 356 |
|
| 357 |
/* offset */ |
| 358 |
if (PG_ARGISNULL(4)) { |
| 359 |
offset = 0; |
| 360 |
} else { |
| 361 |
offset = PG_GETARG_INT32(4); |
| 362 |
} |
| 363 |
|
| 364 |
|
| 365 |
/* Send any errors or warnings to log, as well as |
| 366 |
* STDOUT and STDERR (just to be sure) */ |
| 367 |
if ( logfh = fopen("/tmp/pgswish.log", "a") ) { |
| 368 |
set_error_handle( logfh ); |
| 369 |
elog(INFO, "loggin swish-e errors to /tmp/pgswish.log"); |
| 370 |
/* redirect STDOUT and STDERR to log */ |
| 371 |
dup2(1, logfh); |
| 372 |
dup2(2, logfh); |
| 373 |
} else { |
| 374 |
elog(INFO, "can't open /tmp/pgswish.log -- errors from swish-e won't be cought and may result in back-end crashes!"); |
| 375 |
} |
| 376 |
|
| 377 |
elog(INFO, "pgswish: SwishInit(%s)", index_path); |
| 378 |
|
| 379 |
swish_handle = SwishInit( index_path ); |
| 380 |
|
| 381 |
if ( SwishError( swish_handle ) || ! swish_handle ) |
| 382 |
ereport(ERROR, (errcode(ERRCODE_INVALID_PARAMETER_VALUE), |
| 383 |
errmsg("pgswish: SwishInit(%s) failed", index_path ), |
| 384 |
errdetail( SwishErrorString( swish_handle ) ) |
| 385 |
)); |
| 386 |
|
| 387 |
elog(DEBUG1, "pgswish: query[%s] attr[%s] limit %d offset %d", query, (PG_ARGISNULL(2) ? "NULL" : attr), limit, offset); |
| 388 |
|
| 389 |
|
| 390 |
/* set ranking scheme. default is 0 */ |
| 391 |
SwishRankScheme( swish_handle, 0 ); |
| 392 |
error_or_abort( swish_handle ); |
| 393 |
|
| 394 |
elog(INFO, "pgswish: SwishQuery(%s)", query); |
| 395 |
/* Here's a short-cut to searching that creates a search object |
| 396 |
* and searches at the same time */ |
| 397 |
|
| 398 |
/* set the search phrase to the search condition object */ |
| 399 |
if (! PG_ARGISNULL(1) && strlen(query) > 0) |
| 400 |
swish_results = SwishQuery( swish_handle, query); |
| 401 |
error_or_abort( swish_handle ); |
| 402 |
|
| 403 |
/* total number of tuples to be returned */ |
| 404 |
resnum = SwishHits( swish_results ); |
| 405 |
|
| 406 |
/* FIXME */ |
| 407 |
if (! PG_ARGISNULL(2) && strlen(attr) >= 10) { |
| 408 |
elog(DEBUG1,"ignored: %s", attr); |
| 409 |
} |
| 410 |
|
| 411 |
/* check if results exists */ |
| 412 |
if ( 0 == resnum ) { |
| 413 |
elog(INFO, "pgswish: no results for: %s", query ); |
| 414 |
} |
| 415 |
|
| 416 |
/* total number of tuples to be returned */ |
| 417 |
if (limit && limit < resnum) { |
| 418 |
nrows = limit - offset; |
| 419 |
} else { |
| 420 |
nrows = resnum - offset; |
| 421 |
} |
| 422 |
|
| 423 |
|
| 424 |
elog(DEBUG1, "pgswish: found %d hits for %s", resnum, query); |
| 425 |
|
| 426 |
|
| 427 |
values = (char **) palloc(ncols * sizeof(char *)); |
| 428 |
|
| 429 |
for (i = 0; i < nrows; i++) |
| 430 |
{ |
| 431 |
SwishSeekResult( swish_results, i + offset ); |
| 432 |
sw_res = SwishNextResult( swish_results ); |
| 433 |
|
| 434 |
/* get result from swish-e */ |
| 435 |
if (! ( SwishErrorString( swish_handle ) ) ) { |
| 436 |
elog(INFO, "can't find result %d", i + offset); |
| 437 |
} else { |
| 438 |
elog(INFO, "Path: %s\n Rank: %lu\n Size: %lu\n Title: %s\n Index: %s\n Modified: %s\n Record #: %lu\n File #: %lu\n\n", |
| 439 |
SwishResultPropertyStr ( sw_res, "swishdocpath" ), |
| 440 |
SwishResultPropertyULong ( sw_res, "swishrank" ), |
| 441 |
SwishResultPropertyULong ( sw_res, "swishdocsize" ), |
| 442 |
SwishResultPropertyStr ( sw_res, "swishtitle"), |
| 443 |
SwishResultPropertyStr ( sw_res, "swishdbfile" ), |
| 444 |
SwishResultPropertyStr ( sw_res, "swishlastmodified" ), |
| 445 |
SwishResultPropertyULong ( sw_res, "swishreccount" ), /* can figure this out in loop, of course */ |
| 446 |
SwishResultPropertyULong ( sw_res, "swishfilenum" ) |
| 447 |
); |
| 448 |
} |
| 449 |
|
| 450 |
/* iterate over results */ |
| 451 |
for (j = 0; j < ncols; j++) |
| 452 |
{ |
| 453 |
bool isnull; |
| 454 |
|
| 455 |
/* array value of this position */ |
| 456 |
indx[0] = j + prop_dim_lower_bounds[0]; |
| 457 |
|
| 458 |
dvalue = array_ref(prop_arr, prop_ndims, indx, -1, prop_len, prop_byval, prop_align, &isnull); |
| 459 |
|
| 460 |
if (!isnull && sw_res) |
| 461 |
values[j] = DatumGetCString( |
| 462 |
prop2text( sw_res, |
| 463 |
(char *)DirectFunctionCall1(textout, dvalue) |
| 464 |
)); |
| 465 |
else |
| 466 |
values[j] = NULL; |
| 467 |
} |
| 468 |
/* construct the tuple */ |
| 469 |
tuple = BuildTupleFromCStrings(attinmeta, values); |
| 470 |
|
| 471 |
/* now store it */ |
| 472 |
tuplestore_puttuple(tupstore, tuple); |
| 473 |
|
| 474 |
} |
| 475 |
|
| 476 |
tuplestore_donestoring(tupstore); |
| 477 |
rsinfo->setResult = tupstore; |
| 478 |
|
| 479 |
/* |
| 480 |
* SFRM_Materialize mode expects us to return a NULL Datum. The actual |
| 481 |
* tuples are in our tuplestore and passed back through |
| 482 |
* rsinfo->setResult. rsinfo->setDesc is set to the tuple description |
| 483 |
* that we actually used to build our tuples with, so the caller can |
| 484 |
* verify we did what it was expecting. |
| 485 |
*/ |
| 486 |
rsinfo->setDesc = tupdesc; |
| 487 |
MemoryContextSwitchTo(oldcontext); |
| 488 |
|
| 489 |
/* free swish object and close */ |
| 490 |
Free_Search_Object( search ); |
| 491 |
SwishClose( swish_handle ); |
| 492 |
|
| 493 |
return (Datum) 0; |
| 494 |
} |
| 495 |
|
| 496 |
|
| 497 |
|
| 498 |
|
| 499 |
/* make text var from property */ |
| 500 |
char *prop2text(SW_RESULT sw_res, char *propname) { |
| 501 |
char *val; |
| 502 |
char *prop; |
| 503 |
int len; |
| 504 |
|
| 505 |
elog(DEBUG2, "prop2text(%s)", propname); |
| 506 |
|
| 507 |
prop = SwishResultPropertyStr( sw_res, propname ); |
| 508 |
if (error_or_abort( swish_handle )) return NULL; |
| 509 |
|
| 510 |
len = strlen(prop); |
| 511 |
elog(DEBUG1, "prop2text(%s) = '%s' %d bytes", propname, prop, len); |
| 512 |
|
| 513 |
len++; |
| 514 |
len *= sizeof(char); |
| 515 |
|
| 516 |
elog(DEBUG2, "palloc(%d)", len); |
| 517 |
|
| 518 |
val = palloc(len); |
| 519 |
|
| 520 |
memset(val, 0, len); |
| 521 |
strncpy(val, prop, len); |
| 522 |
|
| 523 |
elog(DEBUG2, "val=%s", val); |
| 524 |
|
| 525 |
return val; |
| 526 |
} |
| 527 |
|
| 528 |
/* make integer variable from property */ |
| 529 |
char *prop2int(SW_RESULT sw_res, char *propname) { |
| 530 |
char *val; |
| 531 |
unsigned long prop; |
| 532 |
int len; |
| 533 |
|
| 534 |
elog(DEBUG2, "prop2int(%s)", propname); |
| 535 |
|
| 536 |
prop = SwishResultPropertyULong( sw_res, propname ); |
| 537 |
if (error_or_abort( swish_handle )) return NULL; |
| 538 |
|
| 539 |
elog(DEBUG1, "prop2int(%s) = %lu", propname, prop); |
| 540 |
|
| 541 |
len = 128 * sizeof(char); |
| 542 |
elog(DEBUG2, "palloc(%d)", len); |
| 543 |
|
| 544 |
val = palloc(len); |
| 545 |
memset(val, 0, len); |
| 546 |
|
| 547 |
snprintf(val, len, "%lu", prop); |
| 548 |
|
| 549 |
elog(DEBUG2, "val=%s", val); |
| 550 |
|
| 551 |
return val; |
| 552 |
} |
| 553 |
|
| 554 |
|
| 555 |
/* |
| 556 |
* check if swish has returned error, and elog it. |
| 557 |
*/ |
| 558 |
static int error_or_abort( SW_HANDLE swish_handle ) { |
| 559 |
if ( !SwishError( swish_handle ) ) |
| 560 |
return 0; |
| 561 |
|
| 562 |
/* print a message */ |
| 563 |
elog(ERROR, |
| 564 |
"pgswish error: Number [%d], Type [%s], Optional Message: [%s]\n", |
| 565 |
SwishError( swish_handle ), |
| 566 |
SwishErrorString( swish_handle ), |
| 567 |
SwishLastErrorMsg( swish_handle ) |
| 568 |
); |
| 569 |
if ( swish_results ) Free_Results_Object( swish_results ); |
| 570 |
if ( search ) Free_Search_Object( search ); |
| 571 |
SwishClose( swish_handle ); |
| 572 |
|
| 573 |
return 1; |
| 574 |
} |
| 575 |
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