- add an interface ExpectsInputTypes to Expression
- add an interface ImplicitCastInputTypes to Expression
- add a Expression rewrite rule for type coercion
- add a Check Analysis Rule to check whether Plan is Semantically correct
if Expression implements ImplicitCastInputTypes, type coercion rule will automatic rewrite its children that casting it to the most suitable type.
If Expression implements ExpectsInputTypes, Check Analysis will check its children's type whether accepted by expects input types.
Stream load will ignore invisible columns if no http header columns
specified, but in some case user cannot get all columns if columns
changed frequently。
Add a hidden_columns header to support hidden columns import。User can
set hidden_columns such as __DORIS_DELETE_SIGN__ and add this column
in stream load data so we can delete this line.
For example:
curl -u root -v --location-trusted -H "hidden_columns: __DORIS_DELETE_SIGN__" -H
"format: json" -H "strip_outer_array: true" -H "jsonpaths: [\"$.id\",
\"$.name\",\"$.__DORIS_DELETE_SIGN__\"]" -T 1.json
http://{beip}:{be_port}/api/test/test1/_stream_load
Co-authored-by: yixiutt <yixiu@selectdb.com>
When creating table like this:
```
CREATE TABLE `test`.`test_key_order` (
`k1` tinyint(4) NULL COMMENT "",
`k2` smallint(6) NULL COMMENT "",
`k3` int(11) NULL COMMENT "",
`v1` double MAX NULL COMMENT "",
`v2` float SUM NULL COMMENT ""
) ENGINE=OLAP
AGGREGATE KEY(`k1`, `k3`, `k2`)
COMMENT "OLAP"
DISTRIBUTED BY HASH(`k1`) BUCKETS 5
PROPERTIES (
"replication_num" = "1"
);
```
The error message before is:
```
Key columns should be a ordered prefix of the schema.
```
With this PR, the error message is:
```
Key columns should be a ordered prefix of the schema. KeyColumns[1] (starts from zero) is k3, but corresponding column is k2 in the previous columns declaration.
```
In engine_clone_task.cpp, it use tablet->tablet_schema() to create rowset, but in the method, it need a lock that already locked in engine_clone_task.cpp:514. It use cloned_tablet_meta->tablet_schema() originally, but modified in #11131. It need to revert to use cloned_tablet_meta->tablet_schema().
support view in query
and add a rewrite rule: merge consecutive projects.
the rule can merge relative consecutive projects to one project to improve efficiency
