distributed-database

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

tidb> show create table placement_rules\G
*************************** 1. row ***************************
       Table: PLACEMENT_RULES
Create Table: CREATE TABLE `PLACEMENT_RULES` (
  `POLICY_ID` bigint(64) NOT NULL,
  `CATALOG_NAME` varchar(512) NOT NULL

Currently, tree.NotExpr is implemented natively in the vectorized engine, so we have to fallback to the older row-by-row engine to evaluate it. We should, instead, vectorize NotExpr.

I think the implementation will be quite similar to how tree.IsNullExpr implemented, and I think we will want to implement two version of NotExpr operator:

• one for projections, which populates a `coldata

Background

DistSQL is a new feature of version 5.0. Users may encounter some error prompts when using it, but do not understand how to deal with these situations.

Aim

Add FAQ, point out the cause of the error message, and provide solutions.

How to

1. Understand the error message in the task description, investigate and confirm the cause. (Of course you can also ask for h

Calling setclass in fdbcli will try to change any process that matches the process filter given. If no processes are found, it silently does nothing. Instead, it should report back to the user that no processes matched the given filter.

Hello Philip!
I think there is an issue with this part of the code of rqlite (store/store.go).

func (s *Store) Database(leader bool) ([]byte, error) {
	if leader && s.raft.State() != raft.Leader {
		return nil, ErrNotLeader
	}
	// Ensure only one snapshot can take place at once, and block all queries.
	s.mu.Lock()
	defer s.mu.Unlock()

	f, err := ioutil.TempFile("", "rqlilte-snap-

Description

Currently, for e.g. say that out of 3 copies of a tablet, we want to have 2 copies in C1.R1.Z1 and 1 copy in C2.R2.Z2 then we would specify it as below:

./bin/yb-admin \
    -master_addresses $MASTER_RPC_ADDRS \
    modify_placement_info  \
    C1.R1.Z1,C1.R1.Z1,C2.R2.Z2 3

However, this is somewhat complex and hard to follow. We don't need to necessarily r

With Hive connector

trino:default> CREATE TABLE one (a varchar);
            -> CREATE VIEW two AS SELECT * FROM one;
CREATE TABLE
CREATE VIEW

DROP TABLE is rejected on a view:

trino:default> DROP TABLE two;
Query 20210906_150832_00015_id3y3 failed: line 1:1: Table 'hive.default.two' does not exist, but a view with that name exists. Did you mean DROP VIEW hive.default.t

Required by DataGrip. See crate/crate#11726

The full query is

select L.transactionid::varchar::bigint as transaction_id
from pg_catalog.pg_locks L                                                                               
where L.transactionid is not null                                                                        
order by pg_catalog.age(L

Currently we don't have any mechanism to limit the maximum number of clients that could be handled simultaneously.

This feature should be designed properly. Here is some clue: https://redis.io/topics/clients#maximum-number-of-clients

Now that we support more than 1 data type, we should include the values data type in cache nodes. This give us a way of easily identifying what type of data a key points to e.g. string, queue (and more types in the future)

Currently a cache node object consists of a Key, a Value and a TTL. We should also add a field specifying the type of the Value