34 |
#define GET_STR(textp) DatumGetCString(DirectFunctionCall1(textout, PointerGetDatum(textp))) |
#define GET_STR(textp) DatumGetCString(DirectFunctionCall1(textout, PointerGetDatum(textp))) |
35 |
#define GET_TEXT(cstrp) DatumGetTextP(DirectFunctionCall1(textin, CStringGetDatum(cstrp))) |
#define GET_TEXT(cstrp) DatumGetTextP(DirectFunctionCall1(textin, CStringGetDatum(cstrp))) |
36 |
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37 |
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/* prototype */ |
38 |
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char *attr2text(ESTDOC *doc, char *attr); |
39 |
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40 |
ESTDB *db; |
ESTDB *db; |
41 |
ESTCOND *cond; |
ESTCOND *cond; |
42 |
ESTDOC *doc; |
ESTDOC *doc; |
43 |
const CBLIST *texts; |
const CBLIST *texts; |
44 |
int ecode, *est_result, resnum, i, j; |
int ecode, *est_result, resnum, i, j; |
45 |
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int limit = 0; |
46 |
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int offset = 0; |
47 |
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48 |
/* define PostgreSQL v1 function */ |
/* define PostgreSQL v1 function */ |
49 |
PG_FUNCTION_INFO_V1(pgest); |
PG_FUNCTION_INFO_V1(pgest); |
57 |
AttInMetadata *attinmeta; |
AttInMetadata *attinmeta; |
58 |
char *index_path; |
char *index_path; |
59 |
char *query; |
char *query; |
60 |
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char *attr; |
61 |
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62 |
/* stuff done only on the first call of the function */ |
/* stuff done only on the first call of the function */ |
63 |
if (SRF_IS_FIRSTCALL()) { |
if (SRF_IS_FIRSTCALL()) { |
64 |
MemoryContext oldcontext; |
MemoryContext oldcontext; |
65 |
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/* take arguments from function */ |
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//index_path = _textout(PG_GETARG_TEXT_P(0)); |
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index_path = _textout(PG_GETARG_TEXT_P(0)); |
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query = _textout(PG_GETARG_TEXT_P(1)); |
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66 |
/* create a function context for cross-call persistence */ |
/* create a function context for cross-call persistence */ |
67 |
funcctx = SRF_FIRSTCALL_INIT(); |
funcctx = SRF_FIRSTCALL_INIT(); |
68 |
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|
69 |
/* switch to memory context appropriate for multiple function calls */ |
/* switch to memory context appropriate for multiple function calls */ |
70 |
oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx); |
oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx); |
71 |
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/* take arguments from function */ |
72 |
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73 |
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/* index path */ |
74 |
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if (PG_ARGISNULL(0)) { |
75 |
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elog(ERROR, "index path can't be null"); |
76 |
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SRF_RETURN_DONE(funcctx); |
77 |
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} |
78 |
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index_path = _textout(PG_GETARG_TEXT_P(0)); |
79 |
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80 |
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/* query string */ |
81 |
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if (PG_ARGISNULL(0)) { |
82 |
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query = ""; |
83 |
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} else { |
84 |
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query = _textout(PG_GETARG_TEXT_P(1)); |
85 |
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} |
86 |
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87 |
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/* atribute filter */ |
88 |
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if (PG_ARGISNULL(2)) { |
89 |
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attr = ""; |
90 |
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} else { |
91 |
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attr = _textout(PG_GETARG_TEXT_P(2)); |
92 |
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} |
93 |
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94 |
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/* limit */ |
95 |
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if (PG_ARGISNULL(3)) { |
96 |
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limit = 0; |
97 |
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} else { |
98 |
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limit = PG_GETARG_INT32(3); |
99 |
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} |
100 |
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101 |
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/* offset */ |
102 |
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if (PG_ARGISNULL(4)) { |
103 |
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offset = 0; |
104 |
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} else { |
105 |
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offset = PG_GETARG_INT32(4); |
106 |
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} |
107 |
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108 |
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|
109 |
/* open the database */ |
/* open the database */ |
110 |
elog(DEBUG1, "pgest: est_db_open(%s)", index_path); |
elog(DEBUG1, "pgest: est_db_open(%s)", index_path); |
114 |
SRF_RETURN_DONE(funcctx); |
SRF_RETURN_DONE(funcctx); |
115 |
} |
} |
116 |
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|
117 |
elog(DEBUG2, "pgest: query=%s", query); |
elog(INFO, "pgest: query[%s] attr[%s] limit %d offset %d", query, (PG_ARGISNULL(2) ? "NULL" : attr), limit, offset); |
118 |
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|
119 |
/* create a search condition object */ |
/* create a search condition object */ |
120 |
if (!(cond = est_cond_new())) { |
if (!(cond = est_cond_new())) { |
123 |
} |
} |
124 |
|
|
125 |
/* set the search phrase to the search condition object */ |
/* set the search phrase to the search condition object */ |
126 |
est_cond_set_phrase(cond, query); |
if (! PG_ARGISNULL(1) && strlen(query) > 0) |
127 |
|
est_cond_set_phrase(cond, query); |
128 |
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|
129 |
|
/* minimum valid attribute length is 10: @a STREQ a */ |
130 |
|
if (! PG_ARGISNULL(2) && strlen(attr) >= 10) { |
131 |
|
elog(INFO,"est_cond_add_attr(%s)", attr); |
132 |
|
est_cond_add_attr(cond, attr); |
133 |
|
} |
134 |
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|
135 |
/* get the result of search */ |
/* get the result of search */ |
136 |
est_result = est_db_search(db, cond, &resnum, NULL); |
est_result = est_db_search(db, cond, &resnum, NULL); |
137 |
|
|
138 |
/* total number of tuples to be returned */ |
/* total number of tuples to be returned */ |
139 |
funcctx->max_calls = resnum; |
if (limit && limit < resnum) { |
140 |
|
funcctx->max_calls = limit - offset; |
141 |
|
} else { |
142 |
|
funcctx->max_calls = resnum - offset; |
143 |
|
} |
144 |
|
|
145 |
/* check if results exists */ |
/* check if results exists */ |
146 |
if ( 0 == funcctx->max_calls ) |
if ( 0 == funcctx->max_calls ) |
147 |
elog(INFO, "pgest: no results for: %s", query ); |
elog(INFO, "pgest: no results for: %s", query ); |
148 |
|
|
149 |
elog(DEBUG1, "pgest: found %d hits for %s", funcctx->max_calls, query); |
elog(DEBUG1, "pgest: found %d hits for %s", resnum, query); |
150 |
|
|
151 |
/* Build a tuple description for a __pgest tuple */ |
/* Build a tuple description for a __pgest tuple */ |
152 |
tupdesc = RelationNameGetTupleDesc("__pgest"); |
tupdesc = RelationNameGetTupleDesc("__pgest"); |
176 |
max_calls = funcctx->max_calls; |
max_calls = funcctx->max_calls; |
177 |
slot = funcctx->slot; |
slot = funcctx->slot; |
178 |
attinmeta = funcctx->attinmeta; |
attinmeta = funcctx->attinmeta; |
179 |
|
|
180 |
|
if (limit && call_cntr > limit - 1) { |
181 |
|
elog(INFO, "call_cntr: %d limit: %d", call_cntr, limit); |
182 |
|
SRF_RETURN_DONE(funcctx); |
183 |
|
} |
184 |
|
|
185 |
if (call_cntr < max_calls) { |
if (call_cntr < max_calls) { |
186 |
char **values; |
char **values; |
187 |
HeapTuple tuple; |
HeapTuple tuple; |
200 |
* be processed later by the type input functions. |
* be processed later by the type input functions. |
201 |
*/ |
*/ |
202 |
|
|
203 |
if (doc = est_db_get_doc(db, est_result[call_cntr], 0)) { |
if (doc = est_db_get_doc(db, est_result[call_cntr + offset], 0)) { |
204 |
|
|
205 |
elog(DEBUG1, "URI: %s\n Title: %s\n", |
elog(DEBUG1, "URI: %s\n Title: %s\n", |
206 |
est_doc_attr(doc, "@uri"), |
est_doc_attr(doc, "@uri"), |
211 |
|
|
212 |
// values[0] = (char *) palloc(strlen(_estval) * sizeof(char)); |
// values[0] = (char *) palloc(strlen(_estval) * sizeof(char)); |
213 |
|
|
214 |
values[0] = attr2text(doc,"@id"); |
values[0] = (char *) attr2text(doc,"@id"); |
215 |
values[1] = attr2text(doc,"@uri"); |
values[1] = (char *) attr2text(doc,"@uri"); |
216 |
values[2] = attr2text(doc,"@title"); |
values[2] = (char *) attr2text(doc,"@title"); |
217 |
values[3] = attr2text(doc,"@type"); |
values[3] = (char *) attr2text(doc,"@type"); |
218 |
|
|
219 |
/* destloy the document object */ |
/* destloy the document object */ |
220 |
elog(DEBUG2, "est_doc_delete"); |
elog(DEBUG2, "est_doc_delete"); |
221 |
est_doc_delete(doc); |
est_doc_delete(doc); |
222 |
} else { |
} else { |
223 |
elog(INFO, "no result from estraier"); |
elog(INFO, "no result from estraier"); |
224 |
values[0] = NULL; |
values[0] = DatumGetCString( "" ); |
225 |
values[1] = NULL; |
values[1] = DatumGetCString( "" ); |
226 |
values[2] = NULL; |
values[2] = DatumGetCString( "" ); |
227 |
values[3] = NULL; |
values[3] = DatumGetCString( "" ); |
228 |
} |
} |
229 |
|
|
230 |
|
|
345 |
char *val; |
char *val; |
346 |
const char *attrval; |
const char *attrval; |
347 |
int len; |
int len; |
348 |
|
int attrlen; |
349 |
|
|
350 |
elog(DEBUG1, "doc: %08x, attr: %s", doc, attr); |
elog(DEBUG1, "doc: %08x, attr: %s", doc, attr); |
351 |
|
|
352 |
if (attrval = est_doc_attr(doc, attr)) { |
if ( (attrval = est_doc_attr(doc, attr)) && (attrlen = strlen(attrval)) ) { |
353 |
val = (char *) palloc(strlen(attrval) * sizeof(char)); |
val = (char *) palloc(attrlen * sizeof(char)); |
354 |
} else { |
} else { |
355 |
return (Datum) NULL; |
return (Datum) NULL; |
356 |
} |
} |