Changeset: 93d6c5bdeaa0 for MonetDB
URL: https://dev.monetdb.org/hg/MonetDB/rev/93d6c5bdeaa0
Modified Files:
sql/server/rel_distribute.c
sql/server/rel_optimizer.c
sql/server/rel_statistics.c
Branch: properties
Log Message:
Better solution. Run remote/replica rewriters before statistics
diffs (86 lines):
diff --git a/sql/server/rel_distribute.c b/sql/server/rel_distribute.c
--- a/sql/server/rel_distribute.c
+++ b/sql/server/rel_distribute.c
@@ -10,7 +10,6 @@
#include "rel_optimizer_private.h"
#include "rel_basetable.h"
#include "rel_exp.h"
-#include "rel_rewriter.h"
#include "sql_privileges.h"
static int
@@ -69,7 +68,6 @@ rewrite_replica(mvc *sql, list *exps, sq
node *n, *m;
sql_rel *r = rel_basetable(sql, p, t->base.name);
int allowed = 1;
- sqlstore *store = sql->session->tr->store;
if (!table_privs(sql, p, PRIV_SELECT)) /* Test for privileges */
allowed = 0;
@@ -100,8 +98,6 @@ rewrite_replica(mvc *sql, list *exps, sq
exp_prop_alias(sql->sa, ne, e);
}
list_hash_clear(r->exps); /* the child table may have different column
names, so clear the hash */
- if (isTable(p) && p->s && !isDeclaredTable(p)) /* count active rows
only */
- set_count_prop(sql->sa, r,
(BUN)store->storage_api.count_col(sql->session->tr,
ol_first_node(p->columns)->data, 10));
/* set_remote() */
if (remote_prop && p && isRemote(p)) {
@@ -376,7 +372,6 @@ rel_remote_func_(visitor *v, sql_rel *re
if (find_prop(rel->p, PROP_REMOTE) != NULL) {
list *exps = rel_projections(v->sql, rel, NULL, 1, 1);
rel = rel_relational_func(v->sql->sa, rel, exps);
- set_count_prop(v->sql->sa, rel, get_rel_count(rel->l));
}
return rel;
}
diff --git a/sql/server/rel_optimizer.c b/sql/server/rel_optimizer.c
--- a/sql/server/rel_optimizer.c
+++ b/sql/server/rel_optimizer.c
@@ -656,14 +656,14 @@ const sql_optimizer pre_sql_optimizers[]
/* these optimizers/rewriters only run once after the cycle loop */
const sql_optimizer post_sql_optimizers[] = {
{22, "setjoins_2_joingroupby", bind_setjoins_2_joingroupby},
- {23, "get_statistics", bind_get_statistics}, /* gather statistics */
- {24, "join_order2", bind_join_order2}, /* run join order one more time
with statistics */
- {25, "final_optimization_loop", bind_final_optimization_loop}, /* run
select and group by order with statistics gathered */
/* Merge table rewrites may introduce remote or replica tables */
- /* At the moment, make sure the remote table rewriters always run last
*/
- {26, "rewrite_remote", bind_rewrite_remote},
- {27, "rewrite_replica", bind_rewrite_replica},
- {28, "remote_func", bind_remote_func},
+ /* At the moment, make sure the remote table rewriters always run after
the merge table one */
+ {23, "rewrite_remote", bind_rewrite_remote},
+ {24, "rewrite_replica", bind_rewrite_replica},
+ {25, "remote_func", bind_remote_func},
+ {26, "get_statistics", bind_get_statistics}, /* gather statistics */
+ {27, "join_order2", bind_join_order2}, /* run join order one more time
with statistics */
+ {28, "final_optimization_loop", bind_final_optimization_loop}, /* run
select and group by order with statistics gathered */
{ 0, NULL, NULL}
/* If an optimizer is going to be added, don't forget to update
NSQLREWRITERS macro */
};
diff --git a/sql/server/rel_statistics.c b/sql/server/rel_statistics.c
--- a/sql/server/rel_statistics.c
+++ b/sql/server/rel_statistics.c
@@ -679,7 +679,7 @@ rel_get_statistics_(visitor *v, sql_rel
for (node *n = rel->exps->h ; n ; n = n->next)
rel_basetable_column_get_statistics(v->sql,
rel, n->data);
}
- /* Set table row count. TODO? look for remote/replica tables.
Don't look at storage for declared tables, because it won't be cleaned */
+ /* Set table row count. TODO? look for remote tables. Don't
look at storage for declared tables, because it won't be cleaned */
if (isTable(t) && t->s && !isDeclaredTable(t)) /* count active
rows only */
set_count_prop(v->sql->sa, rel,
(BUN)store->storage_api.count_col(v->sql->session->tr,
ol_first_node(t->columns)->data, 10));
} break;
@@ -692,10 +692,10 @@ rel_get_statistics_(visitor *v, sql_rel
while (is_sample(pl->op) || is_topn(pl->op)) /* skip topN and
sample relations in the middle */
pl = pl->l;
- while (is_sample(r->op) || is_topn(pr->op))
+ while (is_sample(pr->op) || is_topn(pr->op))
pr = pr->l;
/* if it's not a projection, then project and propagate
statistics */
- if (!is_project(pl->op) && !is_base(l->op)) {
+ if (!is_project(pl->op) && !is_base(pl->op)) {
pl = rel_project(v->sql->sa, pl,
rel_projections(v->sql, pl, NULL, 0, 1));
set_count_prop(v->sql->sa, pl, get_rel_count(pl->l));
pl->exps = exps_exp_visitor_bottomup(v, pl, pl->exps,
0, &rel_propagate_statistics, false);
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