thevar1able/ClickHouse
1
0
Fork 0
mirror of https://github.com/ClickHouse/ClickHouse.git synced 2024-12-18 04:12:19 +00:00
Code Issues Packages Projects Releases Wiki Activity

dbms: disabled moving to PREWHERE expressions with GLOBAL IN [#METR-17231].

Browse Source
This commit is contained in:
Alexey Milovidov 2015-07-15 08:07:00 +03:00
parent 6847fdb979
commit 583dd33ed0
1 changed files with 12 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
dbms/include/DB/Storages/MergeTree/MergeTreeWhereOptimizer.h
View File

@ -37,6 +37,8 @@ class MergeTreeWhereOptimizer
static constexpr auto and_function_name = "and";
static constexpr auto equals_function_name = "equals";
static constexpr auto array_join_function_name = "arrayJoin";
static constexpr auto global_in_function_name = "globalIn";
static constexpr auto global_not_in_function_name = "globalNotIn";
public:
MergeTreeWhereOptimizer(const MergeTreeWhereOptimizer&) = delete;
@ -312,8 +314,11 @@ private:
}
/** ARRAY JOIN'ed columns as well as arrayJoin() result cannot be used in PREWHERE, therefore expressions
* containing said columns should not be moved to PREWHERE at all.
* We assume all AS aliases have been expanded prior to using this class */
* containing said columns should not be moved to PREWHERE at all.
* We assume all AS aliases have been expanded prior to using this class
*
* Also, disallow moving expressions with GLOBAL [NOT] IN.
*/
bool cannotBeMoved(const IAST * ptr) const
{
if (const auto function_ptr = typeid_cast<const ASTFunction *>(ptr))
@ -321,6 +326,11 @@ private:
/// disallow arrayJoin expressions to be moved to PREWHERE for now
if (array_join_function_name == function_ptr->name)
return true;
/// disallow GLOBAL IN, GLOBAL NOT IN
if (global_in_function_name == function_ptr->name
|| global_not_in_function_name == function_ptr->name)
return true;
}
else if (const auto identifier_ptr = typeid_cast<const ASTIdentifier *>(ptr))
{