d11365da9c
Otherwise using the stale `_row_in_blocks` will result in heap-buffer-overflow
```
==2695213==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x62900122e210 at pc 0x56524744aecf bp 0x7f62c595ef7
0 sp 0x7f62c595ef68
READ of size 8 at 0x62900122e210 thread T1627 (MemTableFlushTh)
#0 0x56524744aece in doris::vectorized::ColumnVector<long>::insert_indices_from(doris::vectorized::IColumn const&, unsigned int const*, unsigned int const*) /mnt/disk2/lihangyu/doris/be/src/vec/columns/column_vector.cpp:378:33
#1 0x5652472a7538 in doris::vectorized::ColumnNullable::insert_indices_from(doris::vectorized::IColumn const&, unsigned int const*, unsigned int const*) /mnt/disk2/lihangyu/doris/be/src/vec/columns/column_nullable.cpp:310:25
#2 0x56524782a62a in doris::vectorized::MutableBlock::add_rows(doris::vectorized::Block const*, unsigned int const*, unsigned int const*) /mnt/disk2/lihangyu/doris/be/src/vec/core/block.cpp:961:14
#3 0x565233f187ae in doris::MemTable::_put_into_output(doris::vectorized::Block&) /mnt/disk2/lihangyu/doris/be/src/olap/memtable.cpp:248:27
#4 0x565233f1db66 in doris::MemTable::to_block() /mnt/disk2/lihangyu/doris/be/src/olap/memtable.cpp:496:13
#5 0x565233efae60 in doris::FlushToken::_do_flush_memtable(doris::MemTable*, int, long*) /mnt/disk2/lihangyu/doris/be/src/olap/memtable_flush_executor.cpp:121:62
#6 0x565233efc8d6 in doris::FlushToken::_flush_memtable(doris::MemTable*, int, long) /mnt/disk2/lihangyu/doris/be/src/olap/memtable_flush_executor.cpp:150:16
#7 0x565233f0c5eb in doris::MemtableFlushTask::run() /mnt/disk2/lihangyu/doris/be/src/olap/memtable_flush_executor.cpp:58:23
```
新加case注意事项
-
变量名前要写 def，否则是全局变量，并行跑的 case 的时候可能被其他 case 影响。
Problematic code:
ret = ***Correct code:
def ret = *** -
尽量不要在 case 中 global 的设置 session variable，或者修改集群配置，可能会影响其他 case。
Problematic code:
sql """set global enable_pipeline_x_engine=true;"""Correct code:
sql """set enable_pipeline_x_engine=true;""" -
如果必须要设置 global，或者要改集群配置，可以指定 case 以 nonConcurrent 的方式运行。
-
case 中涉及时间相关的，最好固定时间，不要用类似 now() 函数这种动态值，避免过一段时间后 case 就跑不过了。
Problematic code:
sql """select count(*) from table where created < now();"""Correct code:
sql """select count(*) from table where created < '2023-11-13';"""