Add [IF EXISTS] support to following statements:
- CREATE [IF NOT EXISTS] USER
- CREATE [IF NOT EXISTS] ROLE
- DROP [IF EXISTS] USER
- DROP [IF EXISTS] ROLE
support suite block to specify multiple groups.
TestAction support compare result to iterator, local file and http stream.
support print teamcity service message.
abandon the logical: generate groovy file for sql file
support 3 levels parrallel: script file, suite block, thread action
support specify JAVA_OPTS for boot shell
avoid jvm metaspace oom
use -d to run the suite in some directories, instead of -g. and -g is used to specify groups
Current situation of Doris is that the cluster is balanced, but the disks of a backend may be unbalanced.
for example, backend A have two disks: disk1 and disk2, disk1's usage is 98%, but disk2's usage is only 40%.
disk1 is unable to take more data, therefore only one disk of backend A can take new data,
the available write throughput of backend A is only half of its ability, and we can not resolve this through load or
partition rebalance now.
So we introduce disk rebalancer, disk rebalancer is different from other rebalancer(load or partition)
which take care of cluster-wide data balancing. it takes care about backend-wide data balancing.
[For more details see #8550](https://github.com/apache/incubator-doris/issues/8550)
1. add a config string_type_soft_limit to soft limit max length of string type
2. disable using String type in Key column, partition column and
distribution column
3. remove String type alias BLOB for futrue use
Support a lot of actions for regression testing framework.
e.g. thread, lazyCheck, onSuccess, connect, selectUnionAll, timer
Demo exists in ${DORIS_HOME}/regression-test/suites/demo
Add a new column-type to speed up the approximation of quantiles.
1. The new column-type is named `quantile_state` with fixed aggregation function `quantile_union`, which stores the intermediate results of pre-aggregated approximation calculations for quantiles.
2. support pre-aggregation of new column-type and quantile_state related functions.
Currently, the compiled output of BE mainly consists of two binaries:
palo_be and meta_tool, which are both around 1.6G in size.
However, the debug information is only needed for debugging purposes.
So I separate the debug info from binaries.
After BE is built, the debug info file will be saved in `be/lib/debug_info/` dir.
`palo_be` and `meta_tool`'s size decrease to about 100MB
This is optional, and default is disabled.
To enable it, use:
`STRIP_DEBUG_INFO=ON sh build.sh`
Early Design Documentation: https://shimo.im/docs/DT6JXDRkdTvdyV3G
Implement a new way of memory statistics based on TCMalloc New/Delete Hook,
MemTracker and TLS, and it is expected that all memory new/delete/malloc/free
of the BE process can be counted.
Modify the implementation of MemTracker:
1. Simplify a lot of useless logic;
2. Added MemTrackerTaskPool, as the ancestor of all query and import trackers, This is used to track the local memory usage of all tasks executing;
3. Add cosume/release cache, trigger a cosume/release when the memory accumulation exceeds the parameter mem_tracker_consume_min_size_bytes;
4. Add a new memory leak detection mode (Experimental feature), throw an exception when the remaining statistical value is greater than the specified range when the MemTracker is destructed, and print the accurate statistical value in HTTP, the parameter memory_leak_detection
5. Added Virtual MemTracker, cosume/release will not sync to parent. It will be used when introducing TCMalloc Hook to record memory later, to record the specified memory independently;
6. Modify the GC logic, register the buffer cached in DiskIoMgr as a GC function, and add other GC functions later;
7. Change the global root node from Root MemTracker to Process MemTracker, and remove Process MemTracker in exec_env;
8. Modify the macro that detects whether the memory has reached the upper limit, modify the parameters and default behavior of creating MemTracker, modify the error message format in mem_limit_exceeded, extend and apply transfer_to, remove Metric in MemTracker, etc.;
Modify where MemTracker is used:
1. MemPool adds a constructor to create a temporary tracker to avoid a lot of redundant code;
2. Added trackers for global objects such as ChunkAllocator and StorageEngine;
3. Added more fine-grained trackers such as ExprContext;
4. RuntimeState removes FragmentMemTracker, that is, PlanFragmentExecutor mem_tracker, which was previously used for independent statistical scan process memory, and replaces it with _scanner_mem_tracker in OlapScanNode;
5. MemTracker is no longer recorded in ReservationTracker, and ReservationTracker will be removed later;
1. Avoid print large string in error log
If user load a unqualified large string, the all string will be saved in error log,
so the error log is too big that can not be shown be using `show load warnings on "url"`.
Err: `Got packet bigger than 'max_allowed_packet' bytes`
2. Remove duplicate help doc
Do not allow doc with same title, or error thrown when starting FE:
`java.lang.IllegalArgumentException: Multiple entries with same key:`
