Vlad Ilyushchenko

chore(build): fix javadoc warnings

5

I really appreciate everyone adding Javadoc, the more the better. But Javadoc has to be in a correct format. From this PR onwards any Javadoc issue will fail the build

feat(core): WAL implementation

1

Introduced a table registry, when tables are created they are registered with this service. A sequencer is created and initialised for each table when it is registered. The sequencer's main...

### Describe the bug ``` 2022-06-23T12:40:20.3907127Z 2022-06-23T12:40:19.872384Z I i.q.TestListener >>>> io.questdb.cairo.TableReaderTest.testAddColumnPartitionConcurrentCreateReader 2022-06-23T12:40:20.3908408Z 2022-06-23T12:40:19.874378Z I i.q.c.AbstractCairoTest Starting test TableReaderTest#testAddColumnPartitionConcurrentCreateReader 2022-06-23T12:40:20.3910760Z 2022-06-23T12:40:19.880134Z I i.q.c.p.WriterPool open [table=`tbl_meta_test`, thread=117423] 2022-06-23T12:40:20.3913106Z 2022-06-23T12:40:19.880164Z I i.q.c.TableWriter open...

Ability to remove duplicate observations in SELECT

2

Consider the following data we want to exclude repeated observations from `SELECT` ``` | time | temp_outside | temp_inside | +----------+--------------+-------------+ | 12:00:01 | 22 | 27 |

[Channels] Implement MPSC Channels

7

Queue semantics don't offer object reuse. Having to allocate new object instance for every offer() call effectively halves queue throughput. It would be useful to have disruptor-like pattern around a...

We might want to add document for table schema auto-generation of influxdb line-protocol. This feature is missing from [the docs](https://questdb.io/docs/develop/insert-data#influxdb-line-protocol). It's a key feature to consider before we actually using...

Bug - incorrect timestamp filter description

1

 On this screenshot the original upper bound is `Jan` not `Dec`.

Support for DEFAULT keyword in SQL

3

```sql CREATE TABLE "indicators" ( "time" BIGINT NULL, "record_ts" TIMESTAMP DEFAULT '1969-12-31 23:59:59.999', "date" DATE DEFAULT '1969-12-31', "symbol" TEXT DEFAULT '', "event_type" TEXT DEFAULT '', "trade_price" DOUBLE PRECISION DEFAULT NaN,...

Flaky testParallelStressMultipleThreadsMultipleWorkersPositiveLimitJitDisabled

1

### Describe the bug Possible bug in async offload: ``` 2022-09-09T13:13:31.9157982Z 2022-09-09T13:13:31.882773Z I i.q.t.t.TestUtils cleaned [worker=1] 2022-09-09T13:13:31.9829710Z java.lang.AssertionError: expected: but was: 2022-09-09T13:13:31.9843707Z at org.junit.Assert.fail(Assert.java:89) 2022-09-09T13:13:31.9844454Z at org.junit.Assert.failNotEquals(Assert.java:835) 2022-09-09T13:13:31.9845213Z at org.junit.Assert.assertEquals(Assert.java:120)...

fix(sql): fix incorrect data stored when inserting string literals into numeric columns

1

- Fix issue spotted in one of PG tests. In "simple" mode Java PG driver can product the following `insert` on numeric columns: ```sql insert into (long_col, double_col) values ('123000',...