This PR does the following:
1. This PR is a substantial refactor of the JDBC client architecture. The previous monolithic JDBC client has been refactored into an abstract base class `JdbcClient`, and a set of database-specific subclasses (e.g., `JdbcMySQLClient`, `JdbcOracleClient`, etc.), and the JdbcClient required config, abstract into an object. This allows for improved modularity, easier addition of support for new databases, and cleaner, more maintainable code. This change is backward-compatible and does not affect existing functionality.
2. As a result of client refactoring, OceanBaseClient can automatically recognize the mode of operation as MySQL or Oracle, so we cancel the oceanbase_mode property in the Jdbc Catalog, but due to the cancellation of the property, When creating a single OceanBase Jdbc Table, the table type needs to be filled in as oceanbase(mysql mode) or oceanbase_oracle(oracle_mode). The above work is a change in the usage behavior, please note.
3. For the PostgreSQL Jdbc Catalog, I did two things:
1. The adaptation to MATERIALIZED VIEW and FOREIGN TABLE is added
2. Fixed reading jsonb, which had been incorrectly changed to json in a previous PR
4. fix some jdbc catalog test case
5. modify oceanbase jdbc doc
And,Thanks @wolfboys for the guidance
Nereids planner include all columns index in TFileScanRangeParams, this may cause the column projection incorrect for
text format table. Because csv reader use the column index position to split a line. Extra column index will cause get
wrong split result. This PR is to reset the column index after Projection, remove the useless column index.
fix 3 bugs:
1. failed to insert into a table with mv.
```sql
create table t (
id int,
c1 int,
c2 int,
c3 int
) duplicate key(id)
distributed by hash(id) buckets 4
create materialized view k12s3m as select id, sum(c1), max(c3) from t group by id;
insert into t select -4, -4, -4, 'd';
```
insert will rise exception because mv column is not handled. now we will add a target column and value as defineExpr.
2. failed to insert into a table with not all the columns.
```sql
insert into t(c1, c2) select c1, c2 from t
```
and t(id ukey, c1, c2, c3), will insert too many data, we fix it by change the output partitions.
3. failed to insert into a table with complex select.
the select statement has join or agg, fix the bug by the way similar to the one at 2nd bug.
1. make ColumnObject exception safe
2. introduce FlushContext and construct schema at memtable flush stage to make segment independent from dynamic schema
3. add more test cases
When using nereids, if we use compare operator of bitmap type, an analyze exception need to be throwed.
like:
select id from (select BITMAP_EMPTY() as c0 from expr_test) as ref0 where c0 = 1 order by id
Which c0 in subq0 is a bitmap type, this scenario is not supported right now.
The test query includes the conversion of string types to other types, and the processing of materialized columns for nested subqueries, which is the regression test for bug fix(#18783)
Currently, compaction is executed separately for each backend, and the reconstruction of the index during compaction leads to high CPU usage. To address this, we are introducing single replica compaction, where a specific primary replica is selected to perform compaction, and the remaining replicas fetch the compaction results from the primary replica.
The Backend (BE) requests replica information for all peers corresponding to a tablet from the Frontend (FE). This information includes the host where the replica is located and the replica_id. By calculating hash(replica_id), the replica with the smallest hash value is responsible for executing compaction, while the remaining replicas are responsible for fetching the compaction results from this replica.
The compaction task producer thread, before submitting a compaction task, checks whether the local replica should fetch from its peer. If it should, the task is then submitted to the single replica compaction thread pool.
When performing single replica compaction, the process begins by requesting rowset versions from the target replica. These rowset_versions are then compared with the local rowset versions. The first version that can be fetched is selected.
## Problem summary
When we want to push the filter through the union. We should check whether the union's children are `OneRowRelation` or not. If there are some `OneRowRelation`, we shouldn't push down the filter to that part
Before this PR
```
mysql> select * from (select 1 as a, 2 as b union all select 3, 3) t where a = 1;
+------+------+
| a | b |
+------+------+
| 1 | 2 |
| 3 | 3 |
+------+------+
2 rows in set (0.01 sec)
```
After this PR
```
mysql> select * from (select 1 as a, 2 as b union all select 3, 3) t where a = 1;
+------+------+
| a | b |
+------+------+
| 1 | 2 |
+------+------+
1 row in set (0.38 sec)
```
1. Fix create catalog with resource replay bug.
If user create catalog using `create catalog hive with resource xxx`, when replaying edit log,
there is a bug that resource may be dropped, causing NPE and FE will fail to start.
In this PR, I add a new FE config `disallow_create_catalog_with_resource`, default is true.
So that `with resource` will not be allowed, and it will be deprecated later.
And also fix the replay bug to avoid NPE.
2. Fix issue when creating 2 hive catalogs to connect with and without kerberos authentication.
When user create 2 hive catalogs, one use simple auth, the other use kerberos auth.
The query may fail with error like: `Server asks us to fall back to SIMPLE auth, but this client is configured to only allow secure connections.`
So I add a default property for hive catalog: `"ipc.client.fallback-to-simple-auth-allowed" = "true"`.
Which means this property will be added automatically when user creating hive catalog, to avoid such problem.
3. Fix calling `hdfsExists()` issue
When calling `hdfsExists()` with non-zero return code, should check if it encounters error or is file not found.
3. Some code refactor
Avoid import `org.apache.parquet.Strings`
Doris updated array type output format, using double quote for Strings.
Before, it was using single quote. So we need to update the case out file using double quote.
before
mysql [test]>select cast(1 as DECIMALV3(16, 2)) / cast(3 as DECIMALV3(16, 2));
+-----------------------------------------------------------+
| CAST(1 AS DECIMALV3(16, 2)) / CAST(3 AS DECIMALV3(16, 2)) |
+-----------------------------------------------------------+
| 0.00 |
+-----------------------------------------------------------+
mysql [test]>select * from divtest;
+------+------+
| id | val |
+------+------+
| 3 | 5.00 |
| 2 | 4.00 |
| 1 | 3.00 |
+------+------+
mysql [test]>select cast(1 as decimalv3(16,2)) / val from divtest;
+-------------------------------------+
| CAST(1 AS DECIMALV3(16, 2)) / `val` |
+-------------------------------------+
| 0 |
| 0 |
| 0 |
+-------------------------------------+
after
mysql [test]>select cast(1 as DECIMALV3(16, 2)) / cast(3 as DECIMALV3(16, 2));
+-----------------------------------------------------------+
| CAST(1 AS DECIMALV3(16, 2)) / CAST(3 AS DECIMALV3(16, 2)) |
+-----------------------------------------------------------+
| 0.33 |
+-----------------------------------------------------------+
mysql [test]>select cast(1 as decimalv3(16,2)) / val from divtest;
+-------------------------------------+
| CAST(1 AS DECIMALV3(16, 2)) / `val` |
+-------------------------------------+
| 0.250000 |
| 0.200000 |
| 0.333333 |
+-------------------------------------+
This is because in the previous code, the constant 1.000 would be transformed into 1.
remove "ReduceType
before
mysql [(none)]>select cast("10:10:10" as time);
+-------------------------------+
| CAST('10:10:10' AS TIMEV2(0)) |
+-------------------------------+
| 00:00:00 |
+-------------------------------+
after
mysql [(none)]>select cast("10:10:10" as time);
+-------------------------------+
| CAST('10:10:10' AS TIMEV2(0)) |
+-------------------------------+
| 10:10:10 |
+-------------------------------+
In the past, we supported this syntax.
mysql [(none)]>select cast("2023:05:01 13:14:15" as time);
+------------------------------------------+
| CAST('2023:05:01 13:14:15' AS TIMEV2(0)) |
+------------------------------------------+
| 13:14:15 |
+------------------------------------------+
However, "10:10:10" is also a valid datetime.
mysql [(none)]>select cast("10:10:10" as datetime);
+-----------------------------------+
| CAST('10:10:10' AS DATETIMEV2(0)) |
+-----------------------------------+
| 2010-10-10 00:00:00 |
+-----------------------------------+
So here, the order of parsing has been adjusted.
Increase the functionality of advanced materialized view
This feature already supported by legacy planner with PR #19650
This PR implement it in Nereids. This PR implement the features as below:
1. Support multiple columns in aggregate function. eg: select sum(c1 + c2) from t1;
2. Supports complex expressions. eg: select abs(c1), sum(abc(c1+1) + 1) from t1;
TODO:
1. Support adding where in materialized view
* [Bug](point query) checkAndSetPointQuery before checkEnableTwoPhaseRead
1. checkEnableTwoPhaseRead rely on thr short circuit flag
2. add more metric to display lookup profile
* fix rebase
1. Before this PR if rowset does not contain column which should be read for related SlotDescriptor will call `insert_default` to column, but it's not this real defautl value.Real default value relevant information should be provided by the frontend side.
2. Support fetch when light schema change is not enabled, but disable for AGG or UNIQUE MOR model
