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MDEV-14551 Can't find record in table on multi-table update with ORDER BY

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preserve positions if the multi-update join is using tmp table:

* store positions in the tmp table if needed
  JOIN::add_fields_for_current_rowid()

* take positions from the tmp table, not from file->position():
  multi_update::prepare2()
This commit is contained in:
Sergei Golubchik
2018-04-04 15:34:40 +02:00
parent e17e798599
commit 28dbdf3d79
12 changed files with 218 additions and 12 deletions
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5
sql/sql_select.h
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@ -1438,6 +1438,9 @@ public:
enum { QEP_NOT_PRESENT_YET, QEP_AVAILABLE, QEP_DELETED} have_query_plan;
// if keep_current_rowid=true, whether they should be saved in temporary table
bool tmp_table_keep_current_rowid;
/*
Additional WHERE and HAVING predicates to be considered for IN=>EXISTS
subquery transformation of a JOIN object.
@ -1543,6 +1546,7 @@ public:
pushdown_query= 0;
original_join_tab= 0;
explain= NULL;
tmp_table_keep_current_rowid= 0;
all_fields= fields_arg;
if (&fields_list != &fields_arg) /* Avoid valgrind-warning */
@ -1776,6 +1780,7 @@ private:
void cleanup_item_list(List<Item> &items) const;
bool add_having_as_table_cond(JOIN_TAB *tab);
bool make_aggr_tables_info();
bool add_fields_for_current_rowid(JOIN_TAB *cur, List<Item> *fields);
};
enum enum_with_bush_roots { WITH_BUSH_ROOTS, WITHOUT_BUSH_ROOTS};