when show databases/tables/table status where xxx, it will change a selectStmt to select result from
information_schema, it need catalog info to scan schema table, otherwise may get many
database or table info from multi catalog.
for example
mysql> show databases where schema_name='test';
+----------+
| Database |
+----------+
| test |
| test |
+----------+
MySQL [internal.test]> show tables from test where table_name='test_dc';
+----------------+
| Tables_in_test |
+----------------+
| test_dc |
| test_dc |
+----------------+
# Proposed changes
## refactor
- add AggregateExpression to shield the difference of AggregateFunction before disassemble and after
- request `GATHER` physicalProperties for query, because query always collect result to the coordinator, use `GATHER` maybe select a better plan
- refactor `NormalizeAggregate`
- remove some physical fields for the `LogicalAggregate`, like `AggPhase`, `isDisassemble`
- remove `AggregateDisassemble` and `DistinctAggregateDisassemble`, and use `AggregateStrategies` to generate various of PhysicalHashAggregate, like `two phases aggregate`, `three phases aggregate`, and cascades can auto select the lowest cost alternative.
- move `PushAggregateToOlapScan` to `AggregateStrategies`
- separate the traverse and visit method in FoldConstantRuleOnFE
- if some expression not implement the visit method, the traverse method can handle and rewrite the children by default
- if some expression implement the visit, the user defined traverse(invoke accept/visit method) will quickly return because the default visit method will not forward to the children, and the pre-process in traverse method will not be skipped.
## new feature
- support `disable_nereids_rules` to skip some rules.
example:
1. create 1 bucket table `n`
```sql
CREATE TABLE `n` (
`id` bigint(20) NOT NULL
) ENGINE=OLAP
DUPLICATE KEY(`id`)
COMMENT 'OLAP'
DISTRIBUTED BY HASH(`id`) BUCKETS 1
PROPERTIES (
"replication_allocation" = "tag.location.default: 1",
"in_memory" = "false",
"storage_format" = "V2",
"disable_auto_compaction" = "false"
);
```
2. insert some rows into `n`
```sql
insert into n select * from numbers('number'='20000000')
```
3. query table `n`
```sql
SET enable_nereids_planner=true;
SET enable_vectorized_engine=true;
SET enable_fallback_to_original_planner=false;
explain plan select id from n group by id;
```
the result show that we use the one stage aggregate
```
| PhysicalHashAggregate ( aggPhase=LOCAL, aggMode=INPUT_TO_RESULT, groupByExpr=[id#0], outputExpr=[id#0], partitionExpr=Optional.empty, requestProperties=[GATHER], stats=(rows=1, width=1, penalty=2.0E7) ) |
| +--PhysicalProject ( projects=[id#0], stats=(rows=20000000, width=1, penalty=0.0) ) |
| +--PhysicalOlapScan ( qualified=default_cluster:test.n, output=[id#0, name#1], stats=(rows=20000000, width=1, penalty=0.0) ) |
```
4. disable one stage aggregate
```sql
explain plan select
/*+SET_VAR(disable_nereids_rules=DISASSEMBLE_ONE_PHASE_AGGREGATE_WITHOUT_DISTINCT)*/
id
from n
group by id
```
the result is two stage aggregate
```
| PhysicalHashAggregate ( aggPhase=GLOBAL, aggMode=BUFFER_TO_RESULT, groupByExpr=[id#0], outputExpr=[id#0], partitionExpr=Optional[[id#0]], requestProperties=[GATHER], stats=(rows=1, width=1, penalty=2.0E7) ) |
| +--PhysicalHashAggregate ( aggPhase=LOCAL, aggMode=INPUT_TO_BUFFER, groupByExpr=[id#0], outputExpr=[id#0], partitionExpr=Optional[[id#0]], requestProperties=[ANY], stats=(rows=1, width=1, penalty=2.0E7) ) |
| +--PhysicalProject ( projects=[id#0], stats=(rows=20000000, width=1, penalty=0.0) ) |
| +--PhysicalOlapScan ( qualified=default_cluster:test.n, output=[id#0, name#1], stats=(rows=20000000, width=1, penalty=0.0) ) |
```
Set FE `enable_new_load_scan_node` to true by default.
So that all load tasks(broker load, stream load, routine load, insert into) will use FileScanNode instead of BrokerScanNode
to read data
1. Support loading parquet file in stream load with new load scan node.
2. Fix bug that new parquet reader can not read column without logical or converted type.
3. Change jsonb parser function to "jsonb_parse_error_to_null"
So that if the input string is not a valid json string, it will return null for jsonb column in load task.
add DateV2 and DateTimeV2 for Literal.uncheckCastTo()
move nereids tpch cases into suite nereids_tpch_p1
move nereids datav2 cases into suite nereids_datav2_p1
The PhysicalFilter can't be assigned to ExchangeNode, SortNode and UnionNode. The nereids would create a standalone SelectNode to do the filter work properly.
## date_add series
- DATE_ADD
- DAYS_ADD
- ADDDATE
- TIMESTAMPADD
## date_sub series
- DATE_SUB
- DAYS_SUB
- SUBDATE
## NOTE
1. For DAYS_XXX, time unit is omissible, by default the time unit is DAY
2. no TIMESTAMPSUB
At present, there are multiple user interface to access hdfs and s3.
Each interface has its own configuration and is different, which causes confusion for users.
Create resource already supports remote storage resources and resource permission management,
but only `spark`/`odbc_catalog` are in use.
Cloud storage resources need to be created and managed uniformly through create resource.
This PR contains the following changes:
1. Add `s3`, `hdfs` and `hms` resource, and each resource contains it's own configuration items, and delete configuration items scattered in other classes.
2. Use `resource` to create `storage` tools, and use `storage` tools to access the remote file system.
* [fix](schemachange) fix the schema change that causes the be core dump.
Forbid schema change to add or modify the key column of the agg model as double or float.
* [fix](ut) try to fix ConcurrentModifycationException bug
* [Regression](Fix) fix the regression of pipeline and ConcurrentModificationException failed
Co-authored-by: morningman <morningman@163.com>
