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Merge pull request #1095 from mariadb-corporation/MCOL-3769_3

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MCOL-3769 This commit divides create_SH() in two parts.
Conflicts:
	dbcon/mysql/ha_mcs_pushdown.cpp
This commit is contained in:
Gagan Goel
2020-03-18 14:37:02 -04:00
committed by Patrick LeBlanc
parent eb26fa6539
commit 1e9946e23a
4 changed files with 68 additions and 86 deletions
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10
dbcon/mysql/ha_mcs_opt_rewrites.cpp
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@@ -18,7 +18,7 @@
// Search simplify_joins() function in the server's code for detail
COND *
simplify_joins_(JOIN *join, List<TABLE_LIST> *join_list, COND *conds, bool top,
simplify_joins_mcs(JOIN *join, List<TABLE_LIST> *join_list, COND *conds, bool top,
bool in_sj)
{
TABLE_LIST *table;
@@ -26,7 +26,7 @@ simplify_joins_(JOIN *join, List<TABLE_LIST> *join_list, COND *conds, bool top,
TABLE_LIST *prev_table= 0;
List_iterator<TABLE_LIST> li(*join_list);
bool straight_join= MY_TEST(join->select_options & SELECT_STRAIGHT_JOIN);
DBUG_ENTER("simplify_joins");
DBUG_ENTER("simplify_joins_mcs");
/*
Try to simplify join operations from join_list.
@@ -54,7 +54,7 @@ simplify_joins_(JOIN *join, List<TABLE_LIST> *join_list, COND *conds, bool top,
the outer join is converted to an inner join and
the corresponding on expression is added to E.
*/
expr= simplify_joins_(join, &nested_join->join_list,
expr= simplify_joins_mcs(join, &nested_join->join_list,
expr, FALSE, in_sj || table->sj_on_expr);
if (!table->prep_on_expr || expr != table->on_expr)
@@ -67,7 +67,7 @@ simplify_joins_(JOIN *join, List<TABLE_LIST> *join_list, COND *conds, bool top,
}
nested_join->used_tables= (table_map) 0;
nested_join->not_null_tables=(table_map) 0;
conds= simplify_joins_(join, &nested_join->join_list, conds, top,
conds= simplify_joins_mcs(join, &nested_join->join_list, conds, top,
in_sj || table->sj_on_expr);
used_tables= nested_join->used_tables;
not_null_tables= nested_join->not_null_tables;
@@ -241,5 +241,5 @@ simplify_joins_(JOIN *join, List<TABLE_LIST> *join_list, COND *conds, bool top,
li.replace(repl_list);
}
}
DBUG_RETURN(conds);
DBUG_RETURN(conds);
}