database/mariadb-columnstore-engine
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MCOL-4525 Implement columnstore_select_handler=AUTO.

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This feature allows a query execution to fallback to the server,
in case query execution using the select_handler (SH) fails. In case
of fallback, a warning message containing the original reason for
query failure using SH is generated.

To accomplish this task, SH execution is moved to an earlier step when
we create the SH in create_columnstore_select_handler(), instead of the
previous call to SH execution in ha_columnstore_select_handler::init_scan().
This requires some pre-requisite steps that occur in the server in
JOIN::optimize() and JOIN::exec() to be performed before starting SH execution.

In addition, missing test cases from MCOL-424 are also added to the MTR suite,
and the corresponding fix using disable_indices_for_CEJ() is reverted back
since the original fix now appears to be redundant.
This commit is contained in:
Gagan Goel
2021-06-03 13:52:38 +00:00
parent 4ecd561878
commit e3d8100150
13 changed files with 1065 additions and 146 deletions
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5
dbcon/mysql/ha_mcs_impl_if.h
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@ -32,6 +32,7 @@
#include <vector>
#include "idb_mysql.h"
#include "ha_mcs_sysvars.h"
struct st_ha_create_information;
class ha_columnstore_select_handler;
@ -274,7 +275,7 @@ struct cal_connection_info
filePtr(0),
headerLength(0),
useXbit(false),
useCpimport(1),
useCpimport(mcs_use_import_for_batchinsert_mode_t::ON),
delimiter('\7'),
affectedRows(0)
{
@ -341,7 +342,7 @@ struct cal_connection_info
FILE* filePtr;
uint8_t headerLength;
bool useXbit;
uint8_t useCpimport;
mcs_use_import_for_batchinsert_mode_t useCpimport;
char delimiter;
char enclosed_by;
std::vector <execplan::CalpontSystemCatalog::ColType> columnTypes;