2 * collectd - src/utils_db_query.c
3 * Copyright (C) 2008,2009 Florian octo Forster
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
24 * Florian octo Forster <octo at collectd.org>
31 #include "configfile.h"
32 #include "utils_db_query.h"
37 struct udb_result_s; /* {{{ */
38 typedef struct udb_result_s udb_result_t;
42 char *instance_prefix;
53 struct udb_query_s /* {{{ */
58 char *plugin_instance_from;
60 unsigned int min_version;
61 unsigned int max_version;
63 udb_result_t *results;
66 struct udb_result_preparation_area_s /* {{{ */
69 size_t *instances_pos;
72 char **instances_buffer;
74 char **metadata_buffer;
75 char *plugin_instance;
77 struct udb_result_preparation_area_s *next;
79 typedef struct udb_result_preparation_area_s udb_result_preparation_area_t;
81 struct udb_query_preparation_area_s /* {{{ */
84 size_t plugin_instance_pos;
91 udb_result_preparation_area_t *result_prep_areas;
95 * Config Private functions
97 static int udb_config_set_string (char **ret_string, /* {{{ */
102 if ((ci->values_num != 1)
103 || (ci->values[0].type != OCONFIG_TYPE_STRING))
105 WARNING ("db query utils: The `%s' config option "
106 "needs exactly one string argument.", ci->key);
110 string = strdup (ci->values[0].value.string);
113 ERROR ("db query utils: strdup failed.");
117 if (*ret_string != NULL)
119 *ret_string = string;
122 } /* }}} int udb_config_set_string */
124 static int udb_config_add_string (char ***ret_array, /* {{{ */
125 size_t *ret_array_len, oconfig_item_t *ci)
130 if (ci->values_num < 1)
132 WARNING ("db query utils: The `%s' config option "
133 "needs at least one argument.", ci->key);
137 for (int i = 0; i < ci->values_num; i++)
139 if (ci->values[i].type != OCONFIG_TYPE_STRING)
141 WARNING ("db query utils: Argument %i to the `%s' option "
142 "is not a string.", i + 1, ci->key);
147 array_len = *ret_array_len;
148 array = realloc (*ret_array,
149 sizeof (char *) * (array_len + ci->values_num));
152 ERROR ("db query utils: realloc failed.");
157 for (int i = 0; i < ci->values_num; i++)
159 array[array_len] = strdup (ci->values[i].value.string);
160 if (array[array_len] == NULL)
162 ERROR ("db query utils: strdup failed.");
163 *ret_array_len = array_len;
169 *ret_array_len = array_len;
171 } /* }}} int udb_config_add_string */
173 static int udb_config_set_uint (unsigned int *ret_value, /* {{{ */
178 if ((ci->values_num != 1)
179 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
181 WARNING ("db query utils: The `%s' config option "
182 "needs exactly one numeric argument.", ci->key);
186 tmp = ci->values[0].value.number;
187 if ((tmp < 0.0) || (tmp > ((double) UINT_MAX)))
190 *ret_value = (unsigned int) (tmp + .5);
192 } /* }}} int udb_config_set_uint */
195 * Result private functions
197 static int udb_result_submit (udb_result_t *r, /* {{{ */
198 udb_result_preparation_area_t *r_area,
199 udb_query_t const *q, udb_query_preparation_area_t *q_area)
201 value_list_t vl = VALUE_LIST_INIT;
205 assert (r_area->ds != NULL);
206 assert (((size_t) r_area->ds->ds_num) == r->values_num);
207 assert (r->values_num > 0);
209 vl.values = calloc (r->values_num, sizeof (*vl.values));
210 if (vl.values == NULL)
212 ERROR ("db query utils: calloc failed.");
215 vl.values_len = r_area->ds->ds_num;
217 for (size_t i = 0; i < r->values_num; i++)
219 char *value_str = r_area->values_buffer[i];
221 if (0 != parse_value (value_str, &vl.values[i], r_area->ds->ds[i].type))
223 ERROR ("db query utils: udb_result_submit: Parsing `%s' as %s failed.",
224 value_str, DS_TYPE_TO_STRING (r_area->ds->ds[i].type));
231 if (q_area->interval > 0)
232 vl.interval = q_area->interval;
234 sstrncpy (vl.host, q_area->host, sizeof (vl.host));
235 sstrncpy (vl.plugin, q_area->plugin, sizeof (vl.plugin));
236 sstrncpy (vl.type, r->type, sizeof (vl.type));
238 /* Set vl.plugin_instance */
239 if (q->plugin_instance_from != NULL) {
240 sstrncpy (vl.plugin_instance, r_area->plugin_instance, sizeof (vl.plugin_instance));
243 sstrncpy (vl.plugin_instance, q_area->db_name, sizeof (vl.plugin_instance));
246 /* Set vl.type_instance {{{ */
247 if (r->instances_num == 0)
249 if (r->instance_prefix == NULL)
250 vl.type_instance[0] = 0;
252 sstrncpy (vl.type_instance, r->instance_prefix,
253 sizeof (vl.type_instance));
255 else /* if ((r->instances_num > 0) */
257 if (r->instance_prefix == NULL)
259 int status = strjoin (vl.type_instance, sizeof (vl.type_instance),
260 r_area->instances_buffer, r->instances_num, "-");
263 ERROR ("udb_result_submit: creating type_instance failed with status %d.",
270 char tmp[DATA_MAX_NAME_LEN];
272 int status = strjoin (tmp, sizeof (tmp), r_area->instances_buffer,
273 r->instances_num, "-");
276 ERROR ("udb_result_submit: creating type_instance failed with status %d.",
280 tmp[sizeof (tmp) - 1] = 0;
282 snprintf (vl.type_instance, sizeof (vl.type_instance), "%s-%s",
283 r->instance_prefix, tmp);
286 vl.type_instance[sizeof (vl.type_instance) - 1] = 0;
289 /* Annotate meta data. {{{ */
290 if (r->metadata_num > 0)
292 vl.meta = meta_data_create ();
295 ERROR ("db query utils:: meta_data_create failed.");
299 for (size_t i = 0; i < r->metadata_num; i++)
301 status = meta_data_add_string (vl.meta, r->metadata[i],
302 r_area->metadata_buffer[i]);
305 ERROR ("db query utils:: meta_data_add_string failed.");
306 meta_data_destroy (vl.meta);
314 plugin_dispatch_values (&vl);
316 if (r->metadata_num > 0)
318 meta_data_destroy (vl.meta);
323 } /* }}} void udb_result_submit */
325 static void udb_result_finish_result (udb_result_t const *r, /* {{{ */
326 udb_result_preparation_area_t *prep_area)
328 if ((r == NULL) || (prep_area == NULL))
331 prep_area->ds = NULL;
332 sfree (prep_area->instances_pos);
333 sfree (prep_area->values_pos);
334 sfree (prep_area->metadata_pos);
335 sfree (prep_area->instances_buffer);
336 sfree (prep_area->values_buffer);
337 sfree (prep_area->metadata_buffer);
338 } /* }}} void udb_result_finish_result */
340 static int udb_result_handle_result (udb_result_t *r, /* {{{ */
341 udb_query_preparation_area_t *q_area,
342 udb_result_preparation_area_t *r_area,
343 udb_query_t const *q, char **column_values)
345 assert (r && q_area && r_area);
347 for (size_t i = 0; i < r->instances_num; i++)
348 r_area->instances_buffer[i] = column_values[r_area->instances_pos[i]];
350 for (size_t i = 0; i < r->values_num; i++)
351 r_area->values_buffer[i] = column_values[r_area->values_pos[i]];
353 for (size_t i = 0; i < r->metadata_num; i++)
354 r_area->metadata_buffer[i] = column_values[r_area->metadata_pos[i]];
356 if (q->plugin_instance_from)
357 r_area->plugin_instance = column_values[q_area->plugin_instance_pos];
359 return udb_result_submit (r, r_area, q, q_area);
360 } /* }}} int udb_result_handle_result */
362 static int udb_result_prepare_result (udb_result_t const *r, /* {{{ */
363 udb_result_preparation_area_t *prep_area,
364 char **column_names, size_t column_num)
366 if ((r == NULL) || (prep_area == NULL))
369 #define BAIL_OUT(status) \
370 prep_area->ds = NULL; \
371 sfree (prep_area->instances_pos); \
372 sfree (prep_area->values_pos); \
373 sfree (prep_area->metadata_pos); \
374 sfree (prep_area->instances_buffer); \
375 sfree (prep_area->values_buffer); \
376 sfree (prep_area->metadata_buffer); \
379 /* Make sure previous preparations are cleaned up. */
380 udb_result_finish_result (r, prep_area);
381 prep_area->instances_pos = NULL;
382 prep_area->values_pos = NULL;
383 prep_area->metadata_pos = NULL;
385 /* Read `ds' and check number of values {{{ */
386 prep_area->ds = plugin_get_ds (r->type);
387 if (prep_area->ds == NULL)
389 ERROR ("db query utils: udb_result_prepare_result: Type `%s' is not "
390 "known by the daemon. See types.db(5) for details.",
395 if (prep_area->ds->ds_num != r->values_num)
397 ERROR ("db query utils: udb_result_prepare_result: The type `%s' "
398 "requires exactly %zu value%s, but the configuration specifies %zu.",
400 prep_area->ds->ds_num, (prep_area->ds->ds_num == 1) ? "" : "s",
406 /* Allocate r->instances_pos, r->values_pos, r->metadata_post,
407 * r->instances_buffer, r->values_buffer, and r->metadata_buffer {{{ */
408 if (r->instances_num > 0)
410 prep_area->instances_pos
411 = (size_t *) calloc (r->instances_num, sizeof (size_t));
412 if (prep_area->instances_pos == NULL)
414 ERROR ("db query utils: udb_result_prepare_result: calloc failed.");
418 prep_area->instances_buffer
419 = (char **) calloc (r->instances_num, sizeof (char *));
420 if (prep_area->instances_buffer == NULL)
422 ERROR ("db query utils: udb_result_prepare_result: calloc failed.");
425 } /* if (r->instances_num > 0) */
427 prep_area->values_pos
428 = (size_t *) calloc (r->values_num, sizeof (size_t));
429 if (prep_area->values_pos == NULL)
431 ERROR ("db query utils: udb_result_prepare_result: calloc failed.");
435 prep_area->values_buffer
436 = (char **) calloc (r->values_num, sizeof (char *));
437 if (prep_area->values_buffer == NULL)
439 ERROR ("db query utils: udb_result_prepare_result: calloc failed.");
443 prep_area->metadata_pos
444 = (size_t *) calloc (r->metadata_num, sizeof (size_t));
445 if (prep_area->metadata_pos == NULL)
447 ERROR ("db query utils: udb_result_prepare_result: calloc failed.");
451 prep_area->metadata_buffer
452 = (char **) calloc (r->metadata_num, sizeof (char *));
453 if (prep_area->metadata_buffer == NULL)
455 ERROR ("db query utils: udb_result_prepare_result: calloc failed.");
461 /* Determine the position of the plugin instance column {{{ */
462 for (size_t i = 0; i < r->instances_num; i++)
466 for (j = 0; j < column_num; j++)
468 if (strcasecmp (r->instances[i], column_names[j]) == 0)
470 prep_area->instances_pos[i] = j;
477 ERROR ("db query utils: udb_result_prepare_result: "
478 "Column `%s' could not be found.",
482 } /* }}} for (i = 0; i < r->instances_num; i++) */
485 /* Determine the position of the value columns {{{ */
486 for (size_t i = 0; i < r->values_num; i++)
490 for (j = 0; j < column_num; j++)
492 if (strcasecmp (r->values[i], column_names[j]) == 0)
494 prep_area->values_pos[i] = j;
501 ERROR ("db query utils: udb_result_prepare_result: "
502 "Column `%s' could not be found.",
506 } /* }}} for (i = 0; i < r->values_num; i++) */
508 /* Determine the position of the metadata columns {{{ */
509 for (size_t i = 0; i < r->metadata_num; i++)
513 for (j = 0; j < column_num; j++)
515 if (strcasecmp (r->metadata[i], column_names[j]) == 0)
517 prep_area->metadata_pos[i] = j;
524 ERROR ("db query utils: udb_result_prepare_result: "
525 "Metadata column `%s' could not be found.",
529 } /* }}} for (i = 0; i < r->metadata_num; i++) */
533 } /* }}} int udb_result_prepare_result */
535 static void udb_result_free (udb_result_t *r) /* {{{ */
541 sfree (r->instance_prefix);
543 for (size_t i = 0; i < r->instances_num; i++)
544 sfree (r->instances[i]);
545 sfree (r->instances);
547 for (size_t i = 0; i < r->values_num; i++)
548 sfree (r->values[i]);
551 for (size_t i = 0; i < r->metadata_num; i++)
552 sfree (r->metadata[i]);
555 udb_result_free (r->next);
558 } /* }}} void udb_result_free */
560 static int udb_result_create (const char *query_name, /* {{{ */
561 udb_result_t **r_head, oconfig_item_t *ci)
566 if (ci->values_num != 0)
568 WARNING ("db query utils: The `Result' block doesn't accept "
569 "any arguments. Ignoring %i argument%s.",
570 ci->values_num, (ci->values_num == 1) ? "" : "s");
573 r = calloc (1, sizeof (*r));
576 ERROR ("db query utils: calloc failed.");
580 r->instance_prefix = NULL;
586 /* Fill the `udb_result_t' structure.. */
588 for (int i = 0; i < ci->children_num; i++)
590 oconfig_item_t *child = ci->children + i;
592 if (strcasecmp ("Type", child->key) == 0)
593 status = udb_config_set_string (&r->type, child);
594 else if (strcasecmp ("InstancePrefix", child->key) == 0)
595 status = udb_config_set_string (&r->instance_prefix, child);
596 else if (strcasecmp ("InstancesFrom", child->key) == 0)
597 status = udb_config_add_string (&r->instances, &r->instances_num, child);
598 else if (strcasecmp ("ValuesFrom", child->key) == 0)
599 status = udb_config_add_string (&r->values, &r->values_num, child);
600 else if (strcasecmp ("MetadataFrom", child->key) == 0)
601 status = udb_config_add_string (&r->metadata, &r->metadata_num, child);
604 WARNING ("db query utils: Query `%s': Option `%s' not allowed here.",
605 query_name, child->key);
613 /* Check that all necessary options have been given. */
618 WARNING ("db query utils: `Type' not given for "
619 "result in query `%s'", query_name);
622 if (r->values == NULL)
624 WARNING ("db query utils: `ValuesFrom' not given for "
625 "result in query `%s'", query_name);
630 } /* while (status == 0) */
638 /* If all went well, add this result to the list of results. */
648 while (last->next != NULL)
655 } /* }}} int udb_result_create */
658 * Query private functions
660 static void udb_query_free_one (udb_query_t *q) /* {{{ */
666 sfree (q->statement);
667 sfree (q->plugin_instance_from);
669 udb_result_free (q->results);
672 } /* }}} void udb_query_free_one */
675 * Query public functions
677 int udb_query_create (udb_query_t ***ret_query_list, /* {{{ */
678 size_t *ret_query_list_len, oconfig_item_t *ci,
679 udb_query_create_callback_t cb)
681 udb_query_t **query_list;
682 size_t query_list_len;
687 if ((ret_query_list == NULL) || (ret_query_list_len == NULL))
689 query_list = *ret_query_list;
690 query_list_len = *ret_query_list_len;
692 if ((ci->values_num != 1)
693 || (ci->values[0].type != OCONFIG_TYPE_STRING))
695 WARNING ("db query utils: The `Query' block "
696 "needs exactly one string argument.");
700 q = calloc (1, sizeof (*q));
703 ERROR ("db query utils: calloc failed.");
707 q->max_version = UINT_MAX;
710 q->plugin_instance_from = NULL;
712 status = udb_config_set_string (&q->name, ci);
719 /* Fill the `udb_query_t' structure.. */
720 for (int i = 0; i < ci->children_num; i++)
722 oconfig_item_t *child = ci->children + i;
724 if (strcasecmp ("Statement", child->key) == 0)
725 status = udb_config_set_string (&q->statement, child);
726 else if (strcasecmp ("Result", child->key) == 0)
727 status = udb_result_create (q->name, &q->results, child);
728 else if (strcasecmp ("MinVersion", child->key) == 0)
729 status = udb_config_set_uint (&q->min_version, child);
730 else if (strcasecmp ("MaxVersion", child->key) == 0)
731 status = udb_config_set_uint (&q->max_version, child);
732 else if (strcasecmp ("PluginInstanceFrom", child->key) == 0)
733 status = udb_config_set_string (&q->plugin_instance_from, child);
735 /* Call custom callbacks */
738 status = (*cb) (q, child);
741 WARNING ("db query utils: The configuration callback failed "
742 "to handle `%s'.", child->key);
747 WARNING ("db query utils: Query `%s': Option `%s' not allowed here.",
748 q->name, child->key);
756 /* Check that all necessary options have been given. */
759 if (q->statement == NULL)
761 WARNING ("db query utils: Query `%s': No `Statement' given.", q->name);
764 if (q->results == NULL)
766 WARNING ("db query utils: Query `%s': No (valid) `Result' block given.",
770 } /* if (status == 0) */
772 /* If all went well, add this query to the list of queries within the
773 * database structure. */
778 temp = realloc (query_list,
779 sizeof (*query_list) * (query_list_len + 1));
782 ERROR ("db query utils: realloc failed");
788 query_list[query_list_len] = q;
795 udb_query_free_one (q);
799 *ret_query_list = query_list;
800 *ret_query_list_len = query_list_len;
803 } /* }}} int udb_query_create */
805 void udb_query_free (udb_query_t **query_list, size_t query_list_len) /* {{{ */
807 if (query_list == NULL)
810 for (size_t i = 0; i < query_list_len; i++)
811 udb_query_free_one (query_list[i]);
814 } /* }}} void udb_query_free */
816 int udb_query_pick_from_list_by_name (const char *name, /* {{{ */
817 udb_query_t **src_list, size_t src_list_len,
818 udb_query_t ***dst_list, size_t *dst_list_len)
822 if ((name == NULL) || (src_list == NULL) || (dst_list == NULL)
823 || (dst_list_len == NULL))
825 ERROR ("db query utils: udb_query_pick_from_list_by_name: "
826 "Invalid argument.");
831 for (size_t i = 0; i < src_list_len; i++)
833 udb_query_t **tmp_list;
836 if (strcasecmp (name, src_list[i]->name) != 0)
839 tmp_list_len = *dst_list_len;
840 tmp_list = realloc (*dst_list, (tmp_list_len + 1)
841 * sizeof (udb_query_t *));
842 if (tmp_list == NULL)
844 ERROR ("db query utils: realloc failed.");
848 tmp_list[tmp_list_len] = src_list[i];
851 *dst_list = tmp_list;
852 *dst_list_len = tmp_list_len;
855 } /* for (i = 0; i < src_list_len; i++) */
859 ERROR ("db query utils: Cannot find query `%s'. Make sure the <Query> "
860 "block is above the database definition!",
866 DEBUG ("db query utils: Added %i versions of query `%s'.",
871 } /* }}} int udb_query_pick_from_list_by_name */
873 int udb_query_pick_from_list (oconfig_item_t *ci, /* {{{ */
874 udb_query_t **src_list, size_t src_list_len,
875 udb_query_t ***dst_list, size_t *dst_list_len)
879 if ((ci == NULL) || (src_list == NULL) || (dst_list == NULL)
880 || (dst_list_len == NULL))
882 ERROR ("db query utils: udb_query_pick_from_list: "
883 "Invalid argument.");
887 if ((ci->values_num != 1)
888 || (ci->values[0].type != OCONFIG_TYPE_STRING))
890 ERROR ("db query utils: The `%s' config option "
891 "needs exactly one string argument.", ci->key);
894 name = ci->values[0].value.string;
896 return (udb_query_pick_from_list_by_name (name,
897 src_list, src_list_len,
898 dst_list, dst_list_len));
899 } /* }}} int udb_query_pick_from_list */
901 const char *udb_query_get_name (udb_query_t *q) /* {{{ */
907 } /* }}} const char *udb_query_get_name */
909 const char *udb_query_get_statement (udb_query_t *q) /* {{{ */
914 return (q->statement);
915 } /* }}} const char *udb_query_get_statement */
917 void udb_query_set_user_data (udb_query_t *q, void *user_data) /* {{{ */
922 q->user_data = user_data;
923 } /* }}} void udb_query_set_user_data */
925 void *udb_query_get_user_data (udb_query_t *q) /* {{{ */
930 return (q->user_data);
931 } /* }}} void *udb_query_get_user_data */
933 int udb_query_check_version (udb_query_t *q, unsigned int version) /* {{{ */
938 if ((version < q->min_version) || (version > q->max_version))
942 } /* }}} int udb_query_check_version */
944 void udb_query_finish_result (udb_query_t const *q, /* {{{ */
945 udb_query_preparation_area_t *prep_area)
947 udb_result_preparation_area_t *r_area;
950 if ((q == NULL) || (prep_area == NULL))
953 prep_area->column_num = 0;
954 sfree (prep_area->host);
955 sfree (prep_area->plugin);
956 sfree (prep_area->db_name);
958 prep_area->interval = 0;
960 for (r = q->results, r_area = prep_area->result_prep_areas;
961 r != NULL; r = r->next, r_area = r_area->next)
963 /* this may happen during error conditions of the caller */
966 udb_result_finish_result (r, r_area);
968 } /* }}} void udb_query_finish_result */
970 int udb_query_handle_result (udb_query_t const *q, /* {{{ */
971 udb_query_preparation_area_t *prep_area, char **column_values)
973 udb_result_preparation_area_t *r_area;
978 if ((q == NULL) || (prep_area == NULL))
981 if ((prep_area->column_num < 1) || (prep_area->host == NULL)
982 || (prep_area->plugin == NULL) || (prep_area->db_name == NULL))
984 ERROR ("db query utils: Query `%s': Query is not prepared; "
985 "can't handle result.", q->name);
989 #if defined(COLLECT_DEBUG) && COLLECT_DEBUG /* {{{ */
992 for (size_t i = 0; i < prep_area->column_num; i++)
994 DEBUG ("db query utils: udb_query_handle_result (%s, %s): "
996 prep_area->db_name, q->name, i, column_values[i]);
1002 for (r = q->results, r_area = prep_area->result_prep_areas;
1003 r != NULL; r = r->next, r_area = r_area->next)
1005 status = udb_result_handle_result (r, prep_area, r_area,
1013 ERROR ("db query utils: udb_query_handle_result (%s, %s): "
1014 "All results failed.", prep_area->db_name, q->name);
1019 } /* }}} int udb_query_handle_result */
1021 int udb_query_prepare_result (udb_query_t const *q, /* {{{ */
1022 udb_query_preparation_area_t *prep_area,
1023 const char *host, const char *plugin, const char *db_name,
1024 char **column_names, size_t column_num, cdtime_t interval)
1026 udb_result_preparation_area_t *r_area;
1030 if ((q == NULL) || (prep_area == NULL))
1033 udb_query_finish_result (q, prep_area);
1035 prep_area->column_num = column_num;
1036 prep_area->host = strdup (host);
1037 prep_area->plugin = strdup (plugin);
1038 prep_area->db_name = strdup (db_name);
1040 prep_area->interval = interval;
1042 if ((prep_area->host == NULL) || (prep_area->plugin == NULL)
1043 || (prep_area->db_name == NULL))
1045 ERROR ("db query utils: Query `%s': Prepare failed: Out of memory.", q->name);
1046 udb_query_finish_result (q, prep_area);
1050 #if defined(COLLECT_DEBUG) && COLLECT_DEBUG
1053 for (size_t i = 0; i < column_num; i++)
1055 DEBUG ("db query utils: udb_query_prepare_result: "
1056 "query = %s; column[%zu] = %s;",
1057 q->name, i, column_names[i]);
1062 /* Determine the position of the PluginInstance column {{{ */
1063 if (q->plugin_instance_from != NULL)
1067 for (i = 0; i < column_num; i++)
1069 if (strcasecmp (q->plugin_instance_from, column_names[i]) == 0)
1071 prep_area->plugin_instance_pos = i;
1076 if (i >= column_num)
1078 ERROR ("db query utils: udb_query_prepare_result: "
1079 "Column `%s' from `PluginInstanceFrom' could not be found.",
1080 q->plugin_instance_from);
1081 udb_query_finish_result (q, prep_area);
1087 for (r = q->results, r_area = prep_area->result_prep_areas;
1088 r != NULL; r = r->next, r_area = r_area->next)
1092 ERROR ("db query utils: Query `%s': Invalid number of result "
1093 "preparation areas.", q->name);
1094 udb_query_finish_result (q, prep_area);
1098 status = udb_result_prepare_result (r, r_area, column_names, column_num);
1101 udb_query_finish_result (q, prep_area);
1107 } /* }}} int udb_query_prepare_result */
1109 udb_query_preparation_area_t *
1110 udb_query_allocate_preparation_area (udb_query_t *q) /* {{{ */
1112 udb_query_preparation_area_t *q_area;
1113 udb_result_preparation_area_t **next_r_area;
1116 q_area = calloc (1, sizeof (*q_area));
1120 next_r_area = &q_area->result_prep_areas;
1121 for (r = q->results; r != NULL; r = r->next)
1123 udb_result_preparation_area_t *r_area;
1125 r_area = calloc (1, sizeof (*r_area));
1128 udb_result_preparation_area_t *a = q_area->result_prep_areas;
1132 udb_result_preparation_area_t *next = a->next;
1141 *next_r_area = r_area;
1142 next_r_area = &r_area->next;
1146 } /* }}} udb_query_preparation_area_t *udb_query_allocate_preparation_area */
1149 udb_query_delete_preparation_area (udb_query_preparation_area_t *q_area) /* {{{ */
1151 udb_result_preparation_area_t *r_area;
1156 r_area = q_area->result_prep_areas;
1157 while (r_area != NULL)
1159 udb_result_preparation_area_t *area = r_area;
1161 r_area = r_area->next;
1163 sfree (area->instances_pos);
1164 sfree (area->values_pos);
1165 sfree (area->instances_buffer);
1166 sfree (area->values_buffer);
1170 sfree (q_area->host);
1171 sfree (q_area->plugin);
1172 sfree (q_area->db_name);
1175 } /* }}} void udb_query_delete_preparation_area */
1177 /* vim: set sw=2 sts=2 et fdm=marker : */