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Commitd3f7f3b

Browse files
Alena Rybakinadanolivo
Alena Rybakina
authored andcommitted
Load neighbours with the fss hash except dublicated neighours.
Rewrite test for look-a-like functional. Current tests containcorrelation columns and queries have more nodes and descriptionfeatures.Add aqo_k as custom parameter to define few number of featuresfor prediction. Its default value is 3. Queries can containa larger number of features than 3 especially generic queries.Also add predict_a_few_neibours parameter for switch avalableto predict a few neibors than 3. It is done for not to changethe previous logic of the code
1 parent0fdbb07 commitd3f7f3b

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8 files changed

+543
-198
lines changed

8 files changed

+543
-198
lines changed

‎aqo.c‎

Lines changed: 25 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -34,6 +34,7 @@ void _PG_init(void);
3434
/* Strategy of determining feature space for new queries. */
3535
intaqo_mode=AQO_MODE_CONTROLLED;
3636
boolforce_collect_stat;
37+
boolaqo_predict_with_few_neighbors;
3738

3839
/*
3940
* Show special info in EXPLAIN mode.
@@ -71,7 +72,7 @@ intauto_tuning_infinite_loop = 8;
7172
/* Machine learning parameters */
7273

7374
/* The number of nearest neighbors which will be chosen for ML-operations */
74-
intaqo_k=3;
75+
intaqo_k;
7576
doublelog_selectivity_lower_bound=-30;
7677

7778
/*
@@ -287,6 +288,29 @@ _PG_init(void)
287288
NULL
288289
);
289290

291+
DefineCustomIntVariable("aqo.k_neighbors_threshold",
292+
"Set the threshold of number of neighbors for predicting.",
293+
NULL,
294+
&aqo_k,
295+
3,
296+
1,INT_MAX /1000,
297+
PGC_USERSET,
298+
0,
299+
NULL,
300+
NULL,
301+
NULL);
302+
303+
DefineCustomBoolVariable("aqo.predict_with_few_neighbors",
304+
"Make prediction with less neighbors than we should have.",
305+
NULL,
306+
&aqo_predict_with_few_neighbors,
307+
true,
308+
PGC_USERSET,
309+
0,
310+
NULL,
311+
lc_assign_hook,
312+
NULL);
313+
290314
prev_shmem_startup_hook=shmem_startup_hook;
291315
shmem_startup_hook=aqo_init_shmem;
292316
prev_planner_hook=planner_hook;

‎aqo.h‎

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -217,6 +217,7 @@ extern double auto_tuning_convergence_error;
217217
/* Machine learning parameters */
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219219
externintaqo_k;
220+
externboolaqo_predict_with_few_neighbors;
220221
externdoublelog_selectivity_lower_bound;
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222223
/* Parameters for current query */

‎cardinality_estimation.c‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -93,7 +93,7 @@ predict_for_relation(List *clauses, List *selectivities, List *relsigns,
9393
*/
9494

9595
/* Try to search in surrounding feature spaces for the same node */
96-
if (!load_aqo_data(query_context.fspace_hash,*fss,data,NULL,use_wide_search))
96+
if (!load_aqo_data(query_context.fspace_hash,*fss,data,NULL,use_wide_search,features))
9797
result=-1;
9898
else
9999
{

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