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MCOL-1052 LIMIT processing refactoring in getGroupPlan().

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This commit is contained in:
Roman Nozdrin
2018-08-30 17:03:14 +03:00
parent 62f296b443
commit 07561c43d7
3 changed files with 26 additions and 10 deletions
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19
dbcon/mysql/ha_calpont_execplan.cpp
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@@ -10164,25 +10164,28 @@ int getGroupPlan(gp_walk_info& gwi, SELECT_LEX& select_lex, SCSEP& csep, cal_gro
}
}
if (ord_cols.length() > 0) // has order by
if ( gwi.orderByCols.size() ) // has order by
{
gwi.thd->infinidb_vtable.has_order_by = true;
csep->hasOrderBy(true);
ord_cols = " order by " + ord_cols;
select_query += ord_cols;
csep->specHandlerProcessed(true);
}
}
// LIMIT and OFFSET are extracted from TABLE_LIST elements.
// All of JOIN-ed tables contain relevant limit and offset.
if (gi.groupByTables->select_lex->select_limit)
uint64_t limit = (uint64_t)-1;
if (gi.groupByTables->select_lex->select_limit &&
( limit = static_cast<Item_int*>(gi.groupByTables->select_lex->select_limit)->val_int() ) &&
limit != (uint64_t)-1 )
{
csep->limitNum(((Item_int*)gi.groupByTables->select_lex->select_limit)->val_int());
csep->limitNum(limit);
}
else
else if (csep->hasOrderBy())
{
if (csep->hasOrderBy())
csep->limitNum((uint64_t) - 2);
// We use LimitedOrderBy so set the limit to
// go through the check in addOrderByAndLimit
csep->limitNum((uint64_t) - 2);
}
if (gi.groupByTables->select_lex->offset_limit)