The local meta/info files generated during backup are not distinguished
by repo names. If two backup jobs with the same name are submitted to
different repos at the same time, meta/info may be overwritten by another
backup job.
disable is null predicate constant fold rule for inline view
consider sql
select c.*
from (
select a.*, b.x
from test_insert a left join
(select 'some_const_str' x from test_insert) b on true
) c
where c.x is null;
when push “c.x is null” into c, after folding constant rule, it will get empty result. Because x is 'some_const_str' and "x is null" will be evaluated to false. This is wrong.
forbid one phase agg for pattern: agg-unionAll
one phase agg plan: agg-union-hashDistribute-children
two phase agg plan: agg(global) - hashDistribute-agg(local)-union-randomDistribute
the key point is the cost of randomDistribute is much lower than the hashDistribute, and hence two-phase agg wins.
if left bucket has no data, we do not generate left bucket instance.
These join should reserve all right side data. But because left instance
is not exists. So right data will be discard since no dest be set.
We ban these join temporarily until we could generate all instance
for left side in Coordinator.
1. not collect partition stats anymore
2. merge insert of stats
3. delete period collector since it is useless
4. remove enable_auto_sample
5. move some config related to stats to global session variable
Before this PR, when analyze a table, the insert count equals column count times 2
After this PR, insert count of analyze table would reduce to column count / insert_merge_item_count.
According to my test, when analyzing tpch lineitem, the insert sql count is 1
consider sql having in-subquery
SELECT count(*)
FROM sub_query_correlated_subquery6
WHERE k1 IN
(SELECT k1
FROM
(**SELECT k1,
sum(k3) AS bbb,
count(k2) AS aaa
FROM sub_query_correlated_subquery7
WHERE k1 > 0
AND k3 > 0
GROUP BY k1** ) y
WHERE y.aaa>0
AND k1>1);
The subquery part having agg is un-correlated, which can be unnested.
on the other side:
SELECT count(*)
FROM sub_query_correlated_subquery6
WHERE k1 IN
(SELECT k1
FROM
(**SELECT k1,
sum(k3) AS bbb,
count(k2) AS aaa
FROM sub_query_correlated_subquery7
WHERE k1 > 0
AND k3 > 0 and sub_query_correlated_subquery6.k1 > 2
GROUP BY k1** ) y
WHERE y.aaa>0
AND k1>1);
The subquery part having agg is correlated, which can't be unnested.
update Project#findProject
agg function's children could be any expression rather than only slot.
we use Project#findProject to process them. But this util could only
process slot. This PR update this util to let it could process all type
expression.
