6 |
* TODO: |
* TODO: |
7 |
* - check null input using PG_ARGISNULL before using PG_GETARG_xxxx |
* - check null input using PG_ARGISNULL before using PG_GETARG_xxxx |
8 |
* - support composite type arguments |
* - support composite type arguments |
9 |
|
* - split error_or_abort |
10 |
|
* - use getResultPropValue not SwishResultPropertyStr |
11 |
* |
* |
12 |
* NOTES: |
* NOTES: |
13 |
* - clear structures with memset to support hash indexes (who whould like |
* - clear structures with memset to support hash indexes (who whould like |
27 |
#include "fmgr.h" |
#include "fmgr.h" |
28 |
#include "funcapi.h" |
#include "funcapi.h" |
29 |
#include "utils/builtins.h" |
#include "utils/builtins.h" |
30 |
|
#include "utils/array.h" |
31 |
|
#include "miscadmin.h" |
32 |
#include <swish-e.h> |
#include <swish-e.h> |
33 |
|
|
34 |
#define _textin(str) DirectFunctionCall1(textin, CStringGetDatum(str)) |
#define _textin(str) DirectFunctionCall1(textin, CStringGetDatum(str)) |
36 |
#define GET_STR(textp) DatumGetCString(DirectFunctionCall1(textout, PointerGetDatum(textp))) |
#define GET_STR(textp) DatumGetCString(DirectFunctionCall1(textout, PointerGetDatum(textp))) |
37 |
#define GET_TEXT(cstrp) DatumGetTextP(DirectFunctionCall1(textin, CStringGetDatum(cstrp))) |
#define GET_TEXT(cstrp) DatumGetTextP(DirectFunctionCall1(textin, CStringGetDatum(cstrp))) |
38 |
|
|
39 |
|
/* Globals */ |
40 |
SW_HANDLE swish_handle = NULL;/* Database handle */ |
static SW_HANDLE swish_handle = NULL; /* Database handle */ |
41 |
SW_SEARCH search = NULL; /* search handle -- holds search parameters */ |
static SW_SEARCH search = NULL; /* search handle -- search parameters */ |
42 |
SW_RESULTS swish_results = NULL; /* results handle -- holds list of results */ |
static SW_RESULTS swish_results = NULL; /* results handle -- list of results */ |
43 |
|
static SW_RESULT *sw_res = NULL; /* one row from swish-e results */ |
44 |
|
|
45 |
/* define PostgreSQL v1 function */ |
/* define PostgreSQL v1 function */ |
46 |
PG_FUNCTION_INFO_V1(pgswish); |
PG_FUNCTION_INFO_V1(pgswish); |
54 |
AttInMetadata *attinmeta; |
AttInMetadata *attinmeta; |
55 |
char *index_path; |
char *index_path; |
56 |
char *query; |
char *query; |
57 |
|
FILE *logfh; |
58 |
|
|
59 |
/* stuff done only on the first call of the function */ |
/* stuff done only on the first call of the function */ |
60 |
if (SRF_IS_FIRSTCALL()) { |
if (SRF_IS_FIRSTCALL()) { |
72 |
oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx); |
oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx); |
73 |
|
|
74 |
|
|
75 |
/* Send any errors or warnings to stderr (default is stdout) */ |
/* Send any errors or warnings to log, as well as |
76 |
SwishErrorsToStderr(); |
* STDOUT and STDERR (just to be sure) */ |
77 |
|
if ( logfh = fopen("/tmp/pgswish.log", "a") ) { |
78 |
|
set_error_handle( logfh ); |
79 |
|
elog(INFO, "loggin swish-e errors to /tmp/pgswish.log"); |
80 |
|
/* redirect STDOUT and STDERR to log */ |
81 |
|
dup2(1, logfh); |
82 |
|
dup2(2, logfh); |
83 |
|
} else { |
84 |
|
elog(INFO, "can't open /tmp/pgswish.log -- errors from swish-e won't be cought and may result in back-end crashes!"); |
85 |
|
} |
86 |
|
|
87 |
elog(INFO, "pgswish: SwishInit(%s)", index_path); |
elog(INFO, "pgswish: SwishInit(%s)", index_path); |
88 |
|
|
89 |
swish_handle = SwishInit( index_path ); |
swish_handle = SwishInit( index_path ); |
90 |
|
|
91 |
|
if ( SwishError( swish_handle ) ) |
92 |
|
elog(INFO, "pgswish: SwishInit(%s) failed: %s", index_path, SwishErrorString( swish_handle )); |
93 |
|
|
94 |
|
elog(INFO, "handle: %08x", swish_handle); |
95 |
|
|
96 |
if (! swish_handle) { |
if (! swish_handle) { |
97 |
elog(ERROR, "pgswish: can't open %s", index_path); |
elog(ERROR, "pgswish: can't open %s", index_path); |
98 |
SRF_RETURN_DONE(funcctx); |
SRF_RETURN_DONE(funcctx); |
99 |
} |
} |
100 |
|
|
101 |
error_or_abort( swish_handle ); |
if (error_or_abort( swish_handle )) SRF_RETURN_DONE(funcctx); |
102 |
/* set ranking scheme. default is 0 */ |
/* set ranking scheme. default is 0 */ |
103 |
SwishRankScheme( swish_handle, 0 ); |
SwishRankScheme( swish_handle, 0 ); |
104 |
error_or_abort( swish_handle ); |
if (error_or_abort( swish_handle )) SRF_RETURN_DONE(funcctx); |
105 |
|
|
106 |
elog(INFO, "pgswish: SwishQuery(%s)", query); |
elog(INFO, "pgswish: SwishQuery(%s)", query); |
107 |
/* Here's a short-cut to searching that creates a search object and searches at the same time */ |
/* Here's a short-cut to searching that creates a search object and searches at the same time */ |
108 |
swish_results = SwishQuery( swish_handle, query); |
swish_results = SwishQuery( swish_handle, query); |
109 |
error_or_abort( swish_handle ); |
if (error_or_abort( swish_handle )) SRF_RETURN_DONE(funcctx); |
110 |
|
|
111 |
/* total number of tuples to be returned */ |
/* total number of tuples to be returned */ |
112 |
funcctx->max_calls = SwishHits( swish_results ); |
funcctx->max_calls = SwishHits( swish_results ); |
150 |
char **values; |
char **values; |
151 |
HeapTuple tuple; |
HeapTuple tuple; |
152 |
Datum result; |
Datum result; |
|
SW_RESULT *sw_res; /* one row from swish-e results */ |
|
153 |
|
|
154 |
elog(INFO, "pgswish: loop count %d", call_cntr); |
elog(INFO, "pgswish: loop count %d", call_cntr); |
155 |
|
|
158 |
SRF_RETURN_DONE(funcctx); |
SRF_RETURN_DONE(funcctx); |
159 |
} |
} |
160 |
|
|
161 |
elog(INFO, "pgswish: check for swish-e error"); |
elog(DEBUG1, "pgswish: check for swish-e error"); |
162 |
error_or_abort( swish_handle ); |
if (error_or_abort( swish_handle )) SRF_RETURN_DONE(funcctx); |
163 |
|
|
164 |
/* |
/* |
165 |
* Prepare a values array for storage in our slot. |
* Prepare a values array for storage in our slot. |
170 |
sw_res = SwishNextResult( swish_results ); |
sw_res = SwishNextResult( swish_results ); |
171 |
if (! sw_res) { |
if (! sw_res) { |
172 |
elog(ERROR, "pgswish: swish-e sort result list: %d rows expected %d", call_cntr, max_calls - 1); |
elog(ERROR, "pgswish: swish-e sort result list: %d rows expected %d", call_cntr, max_calls - 1); |
173 |
|
Free_Results_Object( swish_results ); |
174 |
|
Free_Search_Object( search ); |
175 |
SRF_RETURN_DONE(funcctx); |
SRF_RETURN_DONE(funcctx); |
176 |
} |
} |
177 |
|
|
203 |
values[3] = (char *) palloc(16 * sizeof(char)); |
values[3] = (char *) palloc(16 * sizeof(char)); |
204 |
snprintf(values[3], 16, "%d", 4); |
snprintf(values[3], 16, "%d", 4); |
205 |
*/ |
*/ |
206 |
|
|
207 |
/* build a tuple */ |
/* build a tuple */ |
208 |
tuple = BuildTupleFromCStrings(attinmeta, values); |
tuple = BuildTupleFromCStrings(attinmeta, values); |
209 |
|
|
217 |
pfree(values[3]); |
pfree(values[3]); |
218 |
pfree(values); |
pfree(values); |
219 |
|
|
220 |
elog(INFO, "row: %s|%s|%s|%s",values[0],values[1],values[2],values[3]); |
elog(DEBUG1, "row: %s|%s|%s|%s",values[0],values[1],values[2],values[3]); |
221 |
|
|
222 |
SRF_RETURN_NEXT(funcctx, result); |
SRF_RETURN_NEXT(funcctx, result); |
223 |
} else { |
} else { |
232 |
} |
} |
233 |
} |
} |
234 |
|
|
|
/* |
|
|
* elog errors |
|
|
* |
|
|
*/ |
|
235 |
|
|
236 |
|
/* make text var from property */ |
237 |
char *prop2text(SW_RESULT sw_res, char *propname) { |
char *prop2text(SW_RESULT sw_res, char *propname) { |
238 |
char *val; |
char *val; |
239 |
char *prop; |
char *prop; |
240 |
int len; |
int len; |
241 |
|
|
242 |
elog(INFO, "prop2text(%s)", propname); |
elog(DEBUG2, "prop2text(%s)", propname); |
243 |
|
|
244 |
prop = SwishResultPropertyStr( sw_res, propname ); |
prop = SwishResultPropertyStr( sw_res, propname ); |
245 |
error_or_abort( swish_handle ); |
if (error_or_abort( swish_handle )) return NULL; |
246 |
|
|
247 |
len = strlen(prop); |
len = strlen(prop); |
248 |
elog(INFO, "prop2text(%s) = '%s' %d bytes", propname, prop, len); |
elog(DEBUG1, "prop2text(%s) = '%s' %d bytes", propname, prop, len); |
249 |
|
|
250 |
len++; |
len++; |
251 |
len *= sizeof(char); |
len *= sizeof(char); |
252 |
|
|
253 |
elog(INFO, "palloc(%d)", len); |
elog(DEBUG2, "palloc(%d)", len); |
254 |
|
|
255 |
val = palloc(len); |
val = palloc(len); |
256 |
|
|
257 |
memset(val, 0, len); |
memset(val, 0, len); |
258 |
strncpy(val, prop, len); |
strncpy(val, prop, len); |
259 |
|
|
260 |
elog(INFO, "val=%s", val); |
elog(DEBUG2, "val=%s", val); |
261 |
|
|
262 |
return val; |
return val; |
263 |
} |
} |
264 |
|
|
265 |
|
/* make integer variable from property */ |
266 |
char *prop2int(SW_RESULT sw_res, char *propname) { |
char *prop2int(SW_RESULT sw_res, char *propname) { |
267 |
char *val; |
char *val; |
268 |
unsigned long prop; |
unsigned long prop; |
269 |
int len; |
int len; |
270 |
|
|
271 |
elog(INFO, "prop2int(%s)", propname); |
elog(DEBUG2, "prop2int(%s)", propname); |
272 |
|
|
273 |
prop = SwishResultPropertyULong( sw_res, propname ); |
prop = SwishResultPropertyULong( sw_res, propname ); |
274 |
error_or_abort( swish_handle ); |
if (error_or_abort( swish_handle )) return NULL; |
275 |
|
|
276 |
elog(INFO, "prop2int(%s) = %lu", propname, prop); |
elog(DEBUG1, "prop2int(%s) = %lu", propname, prop); |
277 |
|
|
278 |
len = 128 * sizeof(char); |
len = 128 * sizeof(char); |
279 |
elog(INFO, "palloc(%d)", len); |
elog(DEBUG2, "palloc(%d)", len); |
280 |
|
|
281 |
val = palloc(len); |
val = palloc(len); |
282 |
memset(val, 0, len); |
memset(val, 0, len); |
283 |
|
|
284 |
snprintf(val, len, "%lu", prop); |
snprintf(val, len, "%lu", prop); |
285 |
|
|
286 |
elog(INFO, "val=%s", val); |
elog(DEBUG2, "val=%s", val); |
287 |
|
|
288 |
return val; |
return val; |
289 |
} |
} |
290 |
|
|
291 |
|
|
292 |
static void error_or_abort( SW_HANDLE swish_handle ) { |
/* |
293 |
|
* check if swish has returned error, and elog it. |
294 |
|
*/ |
295 |
|
static int error_or_abort( SW_HANDLE swish_handle ) { |
296 |
if ( !SwishError( swish_handle ) ) |
if ( !SwishError( swish_handle ) ) |
297 |
return; |
return 0; |
298 |
|
|
299 |
/* print a message */ |
/* print a message */ |
300 |
elog(ERROR, |
elog(ERROR, |
303 |
SwishErrorString( swish_handle ), |
SwishErrorString( swish_handle ), |
304 |
SwishLastErrorMsg( swish_handle ) |
SwishLastErrorMsg( swish_handle ) |
305 |
); |
); |
306 |
|
if ( swish_results ) Free_Results_Object( swish_results ); |
307 |
if ( search ) Free_Search_Object( search ); |
if ( search ) Free_Search_Object( search ); |
308 |
SwishClose( swish_handle ); |
SwishClose( swish_handle ); |
309 |
|
|
310 |
/* do when there is no more left */ |
return 1; |
311 |
} |
} |
312 |
|
|