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; |
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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limit = PG_GETARG_INT32(2); |
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offset = PG_GETARG_INT32(3); |
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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)) limit = PG_GETARG_INT32(3); |
96 |
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97 |
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/* offset */ |
98 |
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if (! PG_ARGISNULL(4)) offset = PG_GETARG_INT32(4); |
99 |
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100 |
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101 |
/* open the database */ |
/* open the database */ |
102 |
elog(DEBUG1, "pgest: est_db_open(%s)", index_path); |
elog(DEBUG1, "pgest: est_db_open(%s)", index_path); |
106 |
SRF_RETURN_DONE(funcctx); |
SRF_RETURN_DONE(funcctx); |
107 |
} |
} |
108 |
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109 |
elog(INFO, "pgest: query=%s limit %d offset %d", query, limit, offset); |
elog(INFO, "pgest: query[%s] attr[%s] limit %d offset %d", query, (PG_ARGISNULL(2) ? "NULL" : attr), limit, offset); |
110 |
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111 |
/* create a search condition object */ |
/* create a search condition object */ |
112 |
if (!(cond = est_cond_new())) { |
if (!(cond = est_cond_new())) { |
115 |
} |
} |
116 |
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117 |
/* set the search phrase to the search condition object */ |
/* set the search phrase to the search condition object */ |
118 |
est_cond_set_phrase(cond, query); |
if (! PG_ARGISNULL(1) && strlen(query) > 0) |
119 |
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est_cond_set_phrase(cond, query); |
120 |
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121 |
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/* minimum valid attribute length is 10: @a STREQ a */ |
122 |
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if (! PG_ARGISNULL(2) && strlen(attr) >= 10) { |
123 |
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elog(INFO,"est_cond_add_attr(%s)", attr); |
124 |
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est_cond_add_attr(cond, attr); |
125 |
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} |
126 |
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127 |
/* get the result of search */ |
/* get the result of search */ |
128 |
est_result = est_db_search(db, cond, &resnum, NULL); |
est_result = est_db_search(db, cond, &resnum, NULL); |
129 |
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130 |
/* total number of tuples to be returned */ |
/* total number of tuples to be returned */ |
131 |
funcctx->max_calls = resnum; |
if (limit && limit < resnum) { |
132 |
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funcctx->max_calls = limit - offset; |
133 |
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} else { |
134 |
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funcctx->max_calls = resnum - offset; |
135 |
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} |
136 |
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137 |
/* check if results exists */ |
/* check if results exists */ |
138 |
if ( 0 == funcctx->max_calls ) |
if ( 0 == funcctx->max_calls ) |
139 |
elog(INFO, "pgest: no results for: %s", query ); |
elog(INFO, "pgest: no results for: %s", query ); |
140 |
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141 |
elog(DEBUG1, "pgest: found %d hits for %s", funcctx->max_calls, query); |
elog(DEBUG1, "pgest: found %d hits for %s", resnum, query); |
142 |
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143 |
/* Build a tuple description for a __pgest tuple */ |
/* Build a tuple description for a __pgest tuple */ |
144 |
tupdesc = RelationNameGetTupleDesc("__pgest"); |
tupdesc = RelationNameGetTupleDesc("__pgest"); |
203 |
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204 |
// values[0] = (char *) palloc(strlen(_estval) * sizeof(char)); |
// values[0] = (char *) palloc(strlen(_estval) * sizeof(char)); |
205 |
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206 |
values[0] = attr2text(doc,"@id"); |
values[0] = (char *) attr2text(doc,"@id"); |
207 |
values[1] = attr2text(doc,"@uri"); |
values[1] = (char *) attr2text(doc,"@uri"); |
208 |
values[2] = attr2text(doc,"@title"); |
values[2] = (char *) attr2text(doc,"@title"); |
209 |
values[3] = attr2text(doc,"@type"); |
values[3] = (char *) attr2text(doc,"@type"); |
210 |
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211 |
/* destloy the document object */ |
/* destloy the document object */ |
212 |
elog(DEBUG2, "est_doc_delete"); |
elog(DEBUG2, "est_doc_delete"); |
213 |
est_doc_delete(doc); |
est_doc_delete(doc); |
214 |
} else { |
} else { |
215 |
elog(INFO, "no result from estraier"); |
elog(INFO, "no result from estraier"); |
216 |
values[0] = NULL; |
values[0] = DatumGetCString( "" ); |
217 |
values[1] = NULL; |
values[1] = DatumGetCString( "" ); |
218 |
values[2] = NULL; |
values[2] = DatumGetCString( "" ); |
219 |
values[3] = NULL; |
values[3] = DatumGetCString( "" ); |
220 |
} |
} |
221 |
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222 |
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