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MCOL-3828 This commit replaces the method that calls JOIN::optimise()

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internally(thus can remove equi-JOIN predicates) with a recursive f()
to inject equi-JOIN conditions for IN + correlated subquery Item.
This change both solves MCOL-3747 issue and remove issues I first
faced in union.sql test.

This commit also fixes a clean up for conditions pushed for table API
execution path and replaces NULL with nullptr in ha_mcs_impl.cpp.
This commit is contained in:
Roman Nozdrin
2020-03-19 15:39:13 +00:00
parent fae9864a21
commit ce0311aa79
5 changed files with 152 additions and 82 deletions
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98
dbcon/mysql/ha_mcs_impl.cpp
View File

@ -1,4 +1,4 @@
/* Copyright (C) 2014 InfiniDB, Inc.
/* Copyright (C) 2014 InfiniDB, Inc.
Copyright (C) 2019 MariaDB Corporation
This program is free software; you can redistribute it and/or
@ -1196,7 +1196,7 @@ vector<string> getOnUpdateTimestampColumns(string& schema, string& tableName, in
uint32_t doUpdateDelete(THD* thd, gp_walk_info& gwi)
{
if (get_fe_conn_info_ptr() == NULL)
if (get_fe_conn_info_ptr() == nullptr)
set_fe_conn_info_ptr((void*)new cal_connection_info());
cal_connection_info* ci = reinterpret_cast<cal_connection_info*>(get_fe_conn_info_ptr());
@ -2009,7 +2009,7 @@ uint32_t doUpdateDelete(THD* thd, gp_walk_info& gwi)
else
{
delete ci->dmlProc;
ci->dmlProc = NULL;
ci->dmlProc = nullptr;
ci->dmlProc = new MessageQueueClient("DMLProc");
}
@ -2069,7 +2069,7 @@ uint32_t doUpdateDelete(THD* thd, gp_walk_info& gwi)
//cout << "line 1442. received 0 byte from DMLProc and retry = "<< retry << endl;
// Seems dmlProc isn't playing. Reset it and try again.
delete ci->dmlProc;
ci->dmlProc = NULL;
ci->dmlProc = nullptr;
isTimeOut = true; //@Bug 4742
}
}
@ -2117,7 +2117,7 @@ uint32_t doUpdateDelete(THD* thd, gp_walk_info& gwi)
cout << ex.what() << endl;
b = 1;
delete ci->dmlProc;
ci->dmlProc = NULL;
ci->dmlProc = nullptr;
errorMsg = ex.what();
}
catch ( ... )
@ -2125,7 +2125,7 @@ uint32_t doUpdateDelete(THD* thd, gp_walk_info& gwi)
//cout << "... exception while writing to DMLProc" << endl;
b = 1;
delete ci->dmlProc;
ci->dmlProc = NULL;
ci->dmlProc = nullptr;
errorMsg = "Unknown error caught";
}
@ -2189,7 +2189,7 @@ uint32_t doUpdateDelete(THD* thd, gp_walk_info& gwi)
errorMsg = "Lost connection to DMLProc";
b = 1;
delete ci->dmlProc;
ci->dmlProc = NULL;
ci->dmlProc = nullptr;
}
catch (...)
{
@ -2247,7 +2247,7 @@ uint32_t doUpdateDelete(THD* thd, gp_walk_info& gwi)
}
delete ci->dmlProc;
ci->dmlProc = NULL;
ci->dmlProc = nullptr;
return rc;
}
@ -2375,7 +2375,7 @@ int ha_mcs_impl_rnd_init(TABLE* table)
boost::shared_ptr<CalpontSystemCatalog> csc = CalpontSystemCatalog::makeCalpontSystemCatalog(sessionID);
csc->identity(CalpontSystemCatalog::FE);
if (get_fe_conn_info_ptr() == NULL)
if (get_fe_conn_info_ptr() == nullptr)
set_fe_conn_info_ptr((void*)new cal_connection_info());
idbassert(ci != 0);
@ -2581,7 +2581,7 @@ int ha_mcs_impl_rnd_init(TABLE* table)
ti = ci->tableMap[table];
ti.msTablePtr = table;
if (ti.tpl_ctx == 0)
if (ti.tpl_ctx == nullptr)
{
ti.tpl_ctx = new sm::cpsm_tplh_t();
ti.tpl_scan_ctx = sm::sp_cpsm_tplsch_t(new sm::cpsm_tplsch_t());
@ -2589,7 +2589,7 @@ int ha_mcs_impl_rnd_init(TABLE* table)
// make sure rowgroup is null so the new meta data can be taken. This is for some case mysql
// call rnd_init for a table more than once.
ti.tpl_scan_ctx->rowGroup = NULL;
ti.tpl_scan_ctx->rowGroup = nullptr;
try
{
@ -2707,7 +2707,7 @@ int ha_mcs_impl_rnd_next(uchar* buf, TABLE* table)
// if (MIGR::infinidb_vtable.impossibleWhereOnUnion)
// return HA_ERR_END_OF_FILE;
if (get_fe_conn_info_ptr() == NULL)
if (get_fe_conn_info_ptr() == nullptr)
set_fe_conn_info_ptr((void*)new cal_connection_info());
// @bug 3078
@ -2772,7 +2772,7 @@ int ha_mcs_impl_rnd_end(TABLE* table, bool is_pushdown_hand)
{
int rc = 0;
THD* thd = current_thd;
cal_connection_info* ci = NULL;
cal_connection_info* ci = nullptr;
if (get_fe_conn_info_ptr() != NULL)
ci = reinterpret_cast<cal_connection_info*>(get_fe_conn_info_ptr());
@ -2911,7 +2911,7 @@ int ha_mcs_impl_create(const char* name, TABLE* table_arg, HA_CREATE_INFO* creat
{
THD* thd = current_thd;
if (get_fe_conn_info_ptr() == NULL)
if (get_fe_conn_info_ptr() == nullptr)
set_fe_conn_info_ptr((void*)new cal_connection_info());
cal_connection_info* ci = reinterpret_cast<cal_connection_info*>(get_fe_conn_info_ptr());
@ -2940,7 +2940,7 @@ int ha_mcs_impl_create(const char* name, TABLE* table_arg, HA_CREATE_INFO* creat
int ha_mcs_impl_delete_table(const char* name)
{
THD* thd = current_thd;
char* dbName = NULL;
char* dbName = nullptr;
if (!name)
{
@ -2951,7 +2951,7 @@ int ha_mcs_impl_delete_table(const char* name)
//if this is an InfiniDB tmp table ('#sql*.frm') just leave...
if (!memcmp((uchar*)name, tmp_file_prefix, tmp_file_prefix_length)) return 0;
if (get_fe_conn_info_ptr() == NULL)
if (get_fe_conn_info_ptr() == nullptr)
set_fe_conn_info_ptr((void*)new cal_connection_info());
cal_connection_info* ci = reinterpret_cast<cal_connection_info*>(get_fe_conn_info_ptr());
@ -3010,7 +3010,7 @@ int ha_mcs_impl_write_row(const uchar* buf, TABLE* table, uint64_t rows_changed)
}
}
if (get_fe_conn_info_ptr() == NULL)
if (get_fe_conn_info_ptr() == nullptr)
set_fe_conn_info_ptr((void*)new cal_connection_info());
cal_connection_info* ci = reinterpret_cast<cal_connection_info*>(get_fe_conn_info_ptr());
@ -3057,7 +3057,7 @@ int ha_mcs_impl_write_row(const uchar* buf, TABLE* table, uint64_t rows_changed)
int ha_mcs_impl_update_row()
{
if (get_fe_conn_info_ptr() == NULL)
if (get_fe_conn_info_ptr() == nullptr)
set_fe_conn_info_ptr((void*)new cal_connection_info());
cal_connection_info* ci = reinterpret_cast<cal_connection_info*>(get_fe_conn_info_ptr());
@ -3071,7 +3071,7 @@ int ha_mcs_impl_update_row()
int ha_mcs_impl_delete_row()
{
if (get_fe_conn_info_ptr() == NULL)
if (get_fe_conn_info_ptr() == nullptr)
set_fe_conn_info_ptr((void*)new cal_connection_info());
cal_connection_info* ci = reinterpret_cast<cal_connection_info*>(get_fe_conn_info_ptr());
@ -3087,7 +3087,7 @@ void ha_mcs_impl_start_bulk_insert(ha_rows rows, TABLE* table)
{
THD* thd = current_thd;
if (get_fe_conn_info_ptr() == NULL)
if (get_fe_conn_info_ptr() == nullptr)
set_fe_conn_info_ptr((void*)new cal_connection_info());
cal_connection_info* ci = reinterpret_cast<cal_connection_info*>(get_fe_conn_info_ptr());
@ -3300,7 +3300,7 @@ void ha_mcs_impl_start_bulk_insert(ha_rows rows, TABLE* table)
SECURITY_ATTRIBUTES saAttr;
saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
saAttr.bInheritHandle = TRUE;
saAttr.lpSecurityDescriptor = NULL;
saAttr.lpSecurityDescriptor = nullptr;
HANDLE handleList[2];
const char* pSectionMsg;
bSuccess = true;
@ -3320,7 +3320,7 @@ void ha_mcs_impl_start_bulk_insert(ha_rows rows, TABLE* table)
}
// Launch cpimport
LPPROC_THREAD_ATTRIBUTE_LIST lpAttributeList = NULL;
LPPROC_THREAD_ATTRIBUTE_LIST lpAttributeList = nullptr;
SIZE_T attrSize = 0;
STARTUPINFOEX siStartInfo;
@ -3338,7 +3338,7 @@ void ha_mcs_impl_start_bulk_insert(ha_rows rows, TABLE* table)
pSectionMsg = "HeapAlloc for AttrList";
lpAttributeList = reinterpret_cast<LPPROC_THREAD_ATTRIBUTE_LIST>
(HeapAlloc(GetProcessHeap(), 0, attrSize));
bSuccess = lpAttributeList != NULL;
bSuccess = lpAttributeList != nullptr;
}
if (bSuccess)
@ -3373,8 +3373,8 @@ void ha_mcs_impl_start_bulk_insert(ha_rows rows, TABLE* table)
memset(&siStartInfo, 0, sizeof(STARTUPINFOEX));
siStartInfo.StartupInfo.cb = sizeof(STARTUPINFOEX);
siStartInfo.lpAttributeList = lpAttributeList;
siStartInfo.StartupInfo.hStdError = NULL;
siStartInfo.StartupInfo.hStdOutput = NULL;
siStartInfo.StartupInfo.hStdError = nullptr;
siStartInfo.StartupInfo.hStdOutput = nullptr;
siStartInfo.StartupInfo.hStdInput = ci->cpimport_stdin_Rd;
siStartInfo.StartupInfo.dwFlags |= STARTF_USESTDHANDLES;
// Create the child process.
@ -3603,7 +3603,7 @@ int ha_mcs_impl_end_bulk_insert(bool abort, TABLE* table)
std::string aTmpDir(startup::StartUp::tmpDir());
if (get_fe_conn_info_ptr() == NULL)
if (get_fe_conn_info_ptr() == nullptr)
set_fe_conn_info_ptr((void*)new cal_connection_info());
cal_connection_info* ci = reinterpret_cast<cal_connection_info*>(get_fe_conn_info_ptr());
@ -3831,7 +3831,7 @@ int ha_mcs_impl_end_bulk_insert(bool abort, TABLE* table)
int ha_mcs_impl_commit (handlerton* hton, THD* thd, bool all)
{
if (get_fe_conn_info_ptr() == NULL)
if (get_fe_conn_info_ptr() == nullptr)
set_fe_conn_info_ptr((void*)new cal_connection_info());
cal_connection_info* ci = reinterpret_cast<cal_connection_info*>(get_fe_conn_info_ptr());
@ -3863,7 +3863,7 @@ int ha_mcs_impl_commit (handlerton* hton, THD* thd, bool all)
int ha_mcs_impl_rollback (handlerton* hton, THD* thd, bool all)
{
if (get_fe_conn_info_ptr() == NULL)
if (get_fe_conn_info_ptr() == nullptr)
set_fe_conn_info_ptr((void*)new cal_connection_info());
cal_connection_info* ci = reinterpret_cast<cal_connection_info*>(get_fe_conn_info_ptr());
@ -3897,7 +3897,7 @@ int ha_mcs_impl_close_connection (handlerton* hton, THD* thd)
// from vtable(lock_type = 2)
// An ugly way. I will use ha_data w/o external_lock.
// This in MCOL-2178
cal_connection_info* ci = NULL;
cal_connection_info* ci = nullptr;
if(thd_get_ha_data(thd, hton) != (void*)0x42) // 0x42 is the magic CS sets when setup hton
{
ci = reinterpret_cast<cal_connection_info*>(thd_get_ha_data(thd, hton));
@ -3911,7 +3911,7 @@ int ha_mcs_impl_close_connection (handlerton* hton, THD* thd)
{
rc = ha_mcs_impl_close_connection_(hton, thd, *ci);
delete ci->dmlProc;
ci->dmlProc = NULL;
ci->dmlProc = nullptr;
}
if (ci->cal_conn_hndl)
@ -3927,7 +3927,7 @@ int ha_mcs_impl_rename_table(const char* from, const char* to)
{
IDEBUG( cout << "ha_mcs_impl_rename_table: " << from << " => " << to << endl );
if (get_fe_conn_info_ptr() == NULL)
if (get_fe_conn_info_ptr() == nullptr)
set_fe_conn_info_ptr((void*)new cal_connection_info());
cal_connection_info* ci = reinterpret_cast<cal_connection_info*>(get_fe_conn_info_ptr());
@ -3970,7 +3970,7 @@ COND* ha_mcs_impl_cond_push(COND* cond, TABLE* table)
alias.assign(table->alias.ptr(), table->alias.length());
IDEBUG( cout << "ha_mcs_impl_cond_push: " << alias << endl );
if (get_fe_conn_info_ptr() == NULL)
if (get_fe_conn_info_ptr() == nullptr)
set_fe_conn_info_ptr((void*)new cal_connection_info());
cal_connection_info* ci = reinterpret_cast<cal_connection_info*>(get_fe_conn_info_ptr());
@ -4009,7 +4009,7 @@ COND* ha_mcs_impl_cond_push(COND* cond, TABLE* table)
if (ti.condInfo)
{
delete ti.condInfo;
ti.condInfo = 0;
ti.condInfo = nullptr;
ci->tableMap[table] = ti;
}
@ -4022,7 +4022,7 @@ COND* ha_mcs_impl_cond_push(COND* cond, TABLE* table)
}
else
{
return NULL;
return nullptr;
}
}
@ -4045,7 +4045,7 @@ int ha_mcs_impl_external_lock(THD* thd, TABLE* table, int lock_type)
alias.assign(table->alias.ptr(), table->alias.length());
IDEBUG( cout << "external_lock for " << alias << endl );
if (get_fe_conn_info_ptr() == NULL)
if (get_fe_conn_info_ptr() == nullptr)
set_fe_conn_info_ptr((void*)new cal_connection_info());
cal_connection_info* ci = reinterpret_cast<cal_connection_info*>(get_fe_conn_info_ptr());
@ -4062,7 +4062,9 @@ int ha_mcs_impl_external_lock(THD* thd, TABLE* table, int lock_type)
CalTableMap::iterator mapiter = ci->tableMap.find(table);
// make sure this is a release lock (2nd) call called in
// the table mode.
if (mapiter != ci->tableMap.end() && mapiter->second.csep && lock_type == 2)
if (mapiter != ci->tableMap.end()
&& (mapiter->second.condInfo || mapiter->second.csep)
&& lock_type == 2)
{
// CS ends up processing query with handlers
// table mode
@ -4075,13 +4077,13 @@ int ha_mcs_impl_external_lock(THD* thd, TABLE* table, int lock_type)
ci->extendedStats = mapiter->second.conn_hndl->extendedStats;
ci->miniStats = mapiter->second.conn_hndl->miniStats;
sm::sm_cleanup(mapiter->second.conn_hndl);
mapiter->second.conn_hndl = 0;
mapiter->second.conn_hndl = nullptr;
}
if (mapiter->second.condInfo)
{
delete mapiter->second.condInfo;
mapiter->second.condInfo = 0;
mapiter->second.condInfo = nullptr;
}
// MCOL-2178 Check for tableMap size to set this only once.
@ -4132,7 +4134,7 @@ int ha_mcs_impl_external_lock(THD* thd, TABLE* table, int lock_type)
if (tme.second.condInfo)
{
delete tme.second.condInfo;
tme.second.condInfo= 0;
tme.second.condInfo= nullptr;
}
}
ci->tableMap.clear();
@ -4200,7 +4202,7 @@ int ha_mcs_impl_group_by_init(mcs_handler_info *handler_info, TABLE* table)
boost::shared_ptr<CalpontSystemCatalog> csc = CalpontSystemCatalog::makeCalpontSystemCatalog(sessionID);
csc->identity(CalpontSystemCatalog::FE);
if (get_fe_conn_info_ptr() == NULL)
if (get_fe_conn_info_ptr() == nullptr)
set_fe_conn_info_ptr((void*)new cal_connection_info());
cal_connection_info* ci = reinterpret_cast<cal_connection_info*>(get_fe_conn_info_ptr());
@ -4519,7 +4521,7 @@ int ha_mcs_impl_group_by_init(mcs_handler_info *handler_info, TABLE* table)
// make sure rowgroup is null so the new meta data can be taken. This is for some case mysql
// call rnd_init for a table more than once.
ti.tpl_scan_ctx->rowGroup = NULL;
ti.tpl_scan_ctx->rowGroup = nullptr;
try
{
@ -4621,7 +4623,7 @@ int ha_mcs_impl_group_by_next(TABLE* table)
// if (MIGR::infinidb_vtable.impossibleWhereOnUnion)
// return HA_ERR_END_OF_FILE;
if (get_fe_conn_info_ptr() == NULL)
if (get_fe_conn_info_ptr() == nullptr)
set_fe_conn_info_ptr((void*)new cal_connection_info());
cal_connection_info* ci = reinterpret_cast<cal_connection_info*>(get_fe_conn_info_ptr());
@ -4700,7 +4702,7 @@ int ha_mcs_impl_group_by_end(TABLE* table)
{
int rc = 0;
THD* thd = current_thd;
cal_connection_info* ci = NULL;
cal_connection_info* ci = nullptr;
if (thd->slave_thread && !get_replication_slave(thd) && (
thd->lex->sql_command == SQLCOM_INSERT ||
@ -4962,8 +4964,8 @@ int ha_cs_impl_pushdown_init(mcs_handler_info* handler_info, TABLE* table)
sm::cpsm_conhdl_t* hndl;
SCSEP csep;
// Declare handlers ptrs in this scope for future use.
select_handler* sh = NULL;
derived_handler* dh = NULL;
select_handler* sh = nullptr;
derived_handler* dh = nullptr;
// update traceFlags according to the autoswitch state.
ci->traceFlags = (ci->traceFlags | CalpontSelectExecutionPlan::TRACE_TUPLE_OFF)^
@ -5237,7 +5239,7 @@ int ha_cs_impl_pushdown_init(mcs_handler_info* handler_info, TABLE* table)
// make sure rowgroup is null so the new meta data can be taken. This is for some case mysql
// call rnd_init for a table more than once.
ti.tpl_scan_ctx->rowGroup = NULL;
ti.tpl_scan_ctx->rowGroup = nullptr;
try
{
@ -5315,7 +5317,7 @@ int ha_cs_impl_select_next(uchar* buf, TABLE* table)
int rc = HA_ERR_END_OF_FILE;
THD* thd = current_thd;
if (get_fe_conn_info_ptr() == NULL)
if (get_fe_conn_info_ptr() == nullptr)
set_fe_conn_info_ptr((void*)new cal_connection_info());
cal_connection_info* ci = reinterpret_cast<cal_connection_info*>(get_fe_conn_info_ptr());
@ -5366,7 +5368,7 @@ int ha_cs_impl_select_next(uchar* buf, TABLE* table)
// make sure rowgroup is null so the new meta data can be taken. This is for some case mysql
// call rnd_init for a table more than once.
ti.tpl_scan_ctx->rowGroup = NULL;
ti.tpl_scan_ctx->rowGroup = nullptr;
try
{

89
dbcon/mysql/ha_mcs_opt_rewrites.cpp
View File

@ -1,4 +1,4 @@
/* Copyright (C) 2019 MariaDB Corporation
/* Copyright (C) 2019-20 MariaDB Corporation
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
@ -14,6 +14,9 @@
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301, USA. */
#include <typeinfo>
#include "ha_mcs_opt_rewrites.h"
// Search simplify_joins() function in the server's code for detail
@ -243,3 +246,87 @@ simplify_joins_mcs(JOIN *join, List<TABLE_LIST> *join_list, COND *conds, bool to
}
DBUG_RETURN(conds);
}
/*@brief in_subselect_rewrite_walk - Rewrites Item_in_subselect*/
/************************************************************
* DESCRIPTION:
* It traverses filter predicates searching for
* Item_in_subselect and rewrites it adding equi-join predicate
* to finalise IN_2_EXISTS rewrite.
* PARAMETERS:
* item_arg - Item to check.
* arg - bool to early return if predicate injection fails.
* RETURN:
***********************************************************/
void in_subselect_rewrite_walk(const Item* item_arg, void* arg)
{
bool* result= reinterpret_cast<bool*>(arg);
if (*result) return;
Item* item= const_cast<Item*>(item_arg);
JOIN* join= nullptr;
if (typeid(*item) == typeid(Item_in_subselect))
{
Item_in_subselect* sub= reinterpret_cast<Item_in_subselect*>(item);
// MCS 1.4.3 doesn't support IN + subquery with UNION so
// we safe to take this JOIN.
join= sub->unit->first_select()->join;
// Inject equi-JOIN predicates if needed.
*result= sub->create_in_to_exists_cond(join);
*result= (*result) ? *result :
sub->inject_in_to_exists_cond(join);
}
else if (typeid(*item) == typeid(Item_singlerow_subselect))
{
Item_singlerow_subselect* sub=
reinterpret_cast<Item_singlerow_subselect*>(item);
// MCS 1.4.3 doesn't support IN + subquery with UNION so
// we safe to take this JOIN.
join= sub->unit->first_select()->join;
}
else
{
// Exit for any but dedicated Items.
return;
}
// Walk recursively to process nested IN ops.
if (join->conds)
{
join->conds->traverse_cond(in_subselect_rewrite_walk,
arg, Item::POSTFIX);
}
}
/*@brief in_subselect_rewrite - Rewrites Item_in_subselect*/
/************************************************************
* DESCRIPTION:
* It traverses TABLE_LISTs running in_subselect_rewrite_walk
* PARAMETERS:
* select_lex
* RETURN:
* bool to to indicate predicate injection failures.
***********************************************************/
bool in_subselect_rewrite(SELECT_LEX *select_lex)
{
bool result = false;
TABLE_LIST *tbl;
List_iterator_fast<TABLE_LIST> li(select_lex->leaf_tables);
while (!result && (tbl= li++))
{
if (tbl->is_view_or_derived())
{
SELECT_LEX *dsl = tbl->derived->first_select();
result = in_subselect_rewrite(dsl);
}
}
if (select_lex->join && select_lex->join->conds)
{
select_lex->join->conds->traverse_cond(in_subselect_rewrite_walk, &result,
Item::POSTFIX);
}
return result;
}

1
dbcon/mysql/ha_mcs_opt_rewrites.h
View File

@ -21,6 +21,7 @@
#include "idb_mysql.h"
COND *simplify_joins_mcs(JOIN *join, List<TABLE_LIST> *join_list, COND *conds, bool top, bool in_sj);
bool in_subselect_rewrite(SELECT_LEX *select_lex);
#endif

44
dbcon/mysql/ha_mcs_pushdown.cpp
View File

@ -42,26 +42,6 @@ void disable_indices_for_CEJ(THD *thd_)
}
}
bool optimize_unflattened_subqueries_mcs(SELECT_LEX *select_lex)
{
bool result = false;
TABLE_LIST *tbl;
List_iterator_fast<TABLE_LIST> li(select_lex->leaf_tables);
while (!result && (tbl= li++))
{
if (tbl->is_view_or_derived())
{
SELECT_LEX *dsl = tbl->derived->first_select();
result = optimize_unflattened_subqueries_mcs(dsl);
}
}
result = (!result) ?
select_lex->optimize_unflattened_subqueries(false) : true;
return result;
}
void mutate_optimizer_flags(THD *thd_)
{
// MCOL-2178 Disable all optimizer flags as it was in the fork.
@ -242,7 +222,6 @@ void save_join_predicates(const Item* item, void* arg)
}
}
/*@brief check_walk - It traverses filter conditions */
/************************************************************
* DESCRIPTION:
@ -823,18 +802,9 @@ create_columnstore_select_handler(THD* thd, SELECT_LEX* select_lex)
COND *conds = nullptr;
if (!unsupported_feature)
{
conds = simplify_joins_mcs(join, select_lex->join_list,
conds= simplify_joins_mcs(join, select_lex->join_list,
join->conds, TRUE, FALSE);
}
// MCOL-3747 IN-TO-EXISTS rewrite inside MDB didn't add
// an equi-JOIN condition.
if (!unsupported_feature
&& optimize_unflattened_subqueries_mcs(select_lex))
{
unsupported_feature = true;
handler->err_msg.assign("create_columnstore_select_handler(): \
Internal error occured in optimize_unflattened_subqueries_mcs()");
}
if (!unsupported_feature && conds)
{
@ -843,9 +813,19 @@ create_columnstore_select_handler(THD* thd, SELECT_LEX* select_lex)
#endif
join->conds = conds;
}
// MCOL-3747 IN-TO-EXISTS rewrite inside MDB didn't add
// an equi-JOIN condition.
if (!unsupported_feature && in_subselect_rewrite(select_lex))
{
unsupported_feature = true;
handler->err_msg.assign("create_columnstore_select_handler(): \
Internal error occured in in_subselect_rewrite()");
}
}
// We can't raise error now so set an error to raise it later in init_SH.
// We shouldn't raise error now so set an error to raise it later in init_SH.
handler->rewrite_error= unsupported_feature;
// Return SH even if init fails b/c CS changed SELECT_LEX structures

2
dbcon/mysql/ha_mcs_pushdown.h
View File

@ -1,5 +1,5 @@
/*
Copyright (c) 2019 MariaDB
Copyright (c) 2019-20 MariaDB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by