Skip to content

14 look a like #115

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 4 commits into from
Jan 27, 2023
Merged

14 look a like #115

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
1aea13f
Load neighbours with the fss hash except dublicated neighours.
Jun 28, 2022
09f4d12
Add disabled nestloop and mergejoin parameters to stabilize look-a-li…
Jan 20, 2023
3c7f20f
Add delete table c after finished look-a-like test.
Jan 20, 2023
4c73906
Rename guc, which connected with setting minimum number of neighbours…
Jan 24, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
26 changes: 25 additions & 1 deletion aqo.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -34,6 +34,7 @@ void _PG_init(void);
/* Strategy of determining feature space for new queries. */
int aqo_mode = AQO_MODE_CONTROLLED;
bool force_collect_stat;
bool aqo_predict_with_few_neighbors;

/*
* Show special info in EXPLAIN mode.
Expand Down Expand Up @@ -71,7 +72,7 @@ int auto_tuning_infinite_loop = 8;
/* Machine learning parameters */

/* The number of nearest neighbors which will be chosen for ML-operations */
int aqo_k = 3;
int aqo_k;
double log_selectivity_lower_bound = -30;

/*
Expand Down Expand Up @@ -293,6 +294,29 @@ _PG_init(void)
NULL
);

DefineCustomIntVariable("aqo.min_neighbors_for_predicting",
"Set how many neighbors the cardinality prediction will be calculated",
NULL,
&aqo_k,
3,
1, INT_MAX / 1000,
PGC_USERSET,
0,
NULL,
NULL,
NULL);

DefineCustomBoolVariable("aqo.predict_with_few_neighbors",
"Establish the ability to make predictions with fewer neighbors than were found.",
NULL,
&aqo_predict_with_few_neighbors,
true,
PGC_USERSET,
0,
NULL,
NULL,
NULL);

prev_shmem_startup_hook = shmem_startup_hook;
shmem_startup_hook = aqo_init_shmem;
prev_planner_hook = planner_hook;
Expand Down
1 change: 1 addition & 0 deletions aqo.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -217,6 +217,7 @@ extern double auto_tuning_convergence_error;
/* Machine learning parameters */

extern int aqo_k;
extern bool aqo_predict_with_few_neighbors;
extern double log_selectivity_lower_bound;

/* Parameters for current query */
Expand Down
2 changes: 1 addition & 1 deletion cardinality_estimation.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -93,7 +93,7 @@ predict_for_relation(List *clauses, List *selectivities, List *relsigns,
*/

/* Try to search in surrounding feature spaces for the same node */
if (!load_aqo_data(query_context.fspace_hash, *fss, data, NULL, use_wide_search))
if (!load_aqo_data(query_context.fspace_hash, *fss, data, NULL, use_wide_search, features))
result = -1;
else
{
Expand Down
Loading