MaxScannerThreadNum in file scan operator when turn on pipelinex is incorrect, it will cost many memory and causing performance degradation. This PR fix it.
In previous implementation, the row count cache will be expired after 10min(by default),
and after expiration, the next row count request will miss the cache, causing unstable query plan.
In this PR, the cache will be refreshed after Config.external_cache_expire_time_minutes_after_access,
so that the cache entry will remain fresh.
Some of mysql connector (eg, dotnet MySQL.Data) rely on variable's column type to make connection.
eg, `select @@autocommit` should with column type `BIGINT`, not `BIT`, otherwise it will throw error like:
```
System.FormatException: The input string 'True' was not in a correct format.
at System.Number.ThrowFormatException[TChar](ReadOnlySpan`1 value)
at System.Convert.ToInt32(String value)
at MySql.Data.MySqlClient.Driver.LoadCharacterSetsAsync(MySqlConnection connection, Boolean execAsync, CancellationToken cancellationToken)
at MySql.Data.MySqlClient.Driver.ConfigureAsync(MySqlConnection connection, Boolean execAsync, CancellationToken cancellationToken)
at MySql.Data.MySqlClient.MySqlConnection.OpenAsync(Boolean execAsync, CancellationToken cancellationToken)
at MySql.Data.MySqlClient.MySqlConnection.Open()
```
In this PR, I add a new field of `VarAttr`: `convertBoolToLongMethod`, if set, it will convert boolean to long.
And set it for `autocommit`
close or finish method will take a lot of time, and the lock will hold a lot of time. If there is a bug in close or finish method, it will affect pipeline execute thread.
writer's close method will need this lock, so that it will hang when close method is called.
* [fix](Nereids) support variant column with index when create table (#32948)
* [opt](Nereids) support create table with variant type (#32953)
---------
Co-authored-by: morrySnow <101034200+morrySnow@users.noreply.github.com>
* [Fix](Variant) forbit table with variant type doing segment compaction temporarily
TODO fix this corretly in later works
* [Bug](Variant) use lower case name for variant's root, since backend treat parent column as lower case
This PR address the problem as blow:
```
errCode = 2, detailMessage = (172.16.56.137)[CANCELLED]failed to initialize storage reader. tablet=17136, res=[INTERNAL_ERROR]Not found field_name, field_name:Tags.tag_key1, schema:[Thread(8), Tags(9), Source(5), tags.tag_key1(-1), Title(6), Level(3), Time(2), CreateDate(1), Message(7), IP(4), AppId(0)]
```
1. Fix iceberg catalog bug
This PR #30198 change the logic of `IcebergHMSExternalCatalog.java`,
to get locationUrl by calling hive metastore's `getCatalog()` method.
But this method only exists in hive 3+. So it will fail if we using hive 2.x.
I temporary remove this logic, because this logic is only used from iceberg table writing.
Which is still under development. We will rethink this logic later.
2. Fix test cases
Some of P2 test cases missed `order_qt`. And because the output format of the floating point
type is changed, some result in `out` files need to be regenerated.
