thevar1able/ClickHouse
1
0
Fork 0
mirror of https://github.com/ClickHouse/ClickHouse.git synced 2024-11-21 15:12:02 +00:00
Code Issues Packages Projects Releases Wiki Activity

Fix bug in delta codec caused by genious C++ implicit type conversion and consequent template type deduction

Browse Source
This commit is contained in:
alesapin 2019-06-28 13:42:36 +03:00
parent ab8dd1d4e3
commit cfd8df6568
3 changed files with 12 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
dbms/src/Compression/CompressionCodecDelta.cpp
View File

@ -48,7 +48,7 @@ void compressDataForType(const char * source, UInt32 source_size, char * dest)
while (source < source_end)
{
T curr_src = unalignedLoad<T>(source);
unalignedStore(dest, curr_src - prev_src);
unalignedStore<T>(dest, curr_src - prev_src);
prev_src = curr_src;
source += sizeof(T);

2
dbms/tests/queries/0_stateless/00957_delta_diff_bug.reference Normal file
View File

@ -0,0 +1,2 @@
1111
2222

9
dbms/tests/queries/0_stateless/00957_delta_diff_bug.sql Normal file
View File

@ -0,0 +1,9 @@
DROP TABLE IF EXISTS segfault_table;
CREATE TABLE segfault_table (id UInt16 CODEC(Delta(2))) ENGINE MergeTree() order by tuple();
INSERT INTO segfault_table VALUES (1111), (2222);
SELECT * FROM segfault_table;
DROP TABLE IF EXISTS segfault_table;