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System Versioning pre0.12

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Merge remote-tracking branch 'origin/archive/2017-10-17' into 10.3
This commit is contained in:
Aleksey Midenkov
2017-11-07 00:37:49 +03:00
parent 835cbbcc7b ce66d5b2a5
commit d8d7251019
354 changed files with 20615 additions and 1638 deletions
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166
sql/sql_view.cc
View File

@ -455,6 +455,140 @@ bool mysql_create_view(THD *thd, TABLE_LIST *views,
goto err;
}
for (SELECT_LEX *sl= select_lex; sl; sl= sl->next_select())
{ /* System Versioning: fix system fields of versioned view */
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wformat"
#pragma GCC diagnostic ignored "-Wformat-extra-args"
// Similar logic as in mysql_derived_prepare()
// Leading versioning table detected implicitly (first one selected)
TABLE_LIST *impli_table= NULL;
// Leading versioning table specified explicitly
// (i.e. if at least one system field is selected)
TABLE_LIST *expli_table= NULL;
const LString_i *impli_start, *impli_end;
Item_field *expli_start= NULL, *expli_end= NULL;
for (TABLE_LIST *table= tables; table; table= table->next_local)
{
DBUG_ASSERT(!table->is_view() || table->view);
// Any versioned table in VIEW will add `FOR SYSTEM_TIME ALL` + WHERE:
// if there are at least one versioned table then VIEW will contain FOR_SYSTEM_TIME_ALL
// (because it is in fact LEX used to parse its SELECT).
if (table->is_view() && table->view->vers_conditions == FOR_SYSTEM_TIME_ALL)
{
my_printf_error(
ER_VERS_VIEW_PROHIBITED,
"Creating VIEW %`s is prohibited: versioned VIEW %`s in query!", MYF(0),
view->table_name,
table->table_name);
res= true;
goto err;
}
if (!table->table || !table->table->versioned())
continue;
const LString_i table_start= table->table->vers_start_field()->field_name;
const LString_i table_end= table->table->vers_end_field()->field_name;
if (!impli_table)
{
impli_table= table;
impli_start= &table_start;
impli_end= &table_end;
}
/* Implicitly add versioning fields if needed */
Item *item;
List_iterator_fast<Item> it(sl->item_list);
DBUG_ASSERT(table->alias);
while ((item= it++))
{
if (item->real_item()->type() != Item::FIELD_ITEM)
continue;
Item_field *fld= (Item_field*) item->real_item();
if (fld->table_name && 0 != my_strcasecmp(table_alias_charset, table->alias, fld->table_name))
continue;
DBUG_ASSERT(fld->field_name.str);
if (table_start == fld->field_name)
{
if (expli_start)
{
my_printf_error(
ER_VERS_VIEW_PROHIBITED,
"Creating VIEW %`s is prohibited: multiple start system fields `%s.%s`, `%s.%s` in query!", MYF(0),
view->table_name,
expli_table->alias,
expli_start->field_name.str,
table->alias,
fld->field_name.str);
res= true;
goto err;
}
if (expli_table)
{
if (expli_table != table)
{
expli_table_err:
my_printf_error(
ER_VERS_VIEW_PROHIBITED,
"Creating VIEW %`s is prohibited: system fields from multiple tables %`s, %`s in query!", MYF(0),
view->table_name,
expli_table->alias,
table->alias);
res= true;
goto err;
}
}
else
expli_table= table;
expli_start= fld;
impli_end= &table_end;
}
else if (table_end == fld->field_name)
{
if (expli_end)
{
my_printf_error(
ER_VERS_VIEW_PROHIBITED,
"Creating VIEW %`s is prohibited: multiple end system fields `%s.%s`, `%s.%s` in query!", MYF(0),
view->table_name,
expli_table->alias,
expli_end->field_name.str,
table->alias,
fld->field_name.str);
res= true;
goto err;
}
if (expli_table)
{
if (expli_table != table)
goto expli_table_err;
}
else
expli_table= table;
expli_end= fld;
impli_start= &table_start;
}
} // while ((item= it++))
} // for (TABLE_LIST *table)
if (expli_table)
impli_table= expli_table;
if (impli_table)
{
if (!expli_start && sl->vers_push_field(thd, impli_table, *impli_start))
goto err;
if (!expli_end && sl->vers_push_field(thd, impli_table, *impli_end))
goto err;
}
#pragma GCC diagnostic pop
} /* System Versioning end */
view= lex->unlink_first_table(&link_to_local);
if (check_db_dir_existence(view->db))
@ -607,14 +741,22 @@ bool mysql_create_view(THD *thd, TABLE_LIST *views,
view->table_name, item->name.str) &
VIEW_ANY_ACL);
if (fld && !fld->field->table->s->tmp_table)
if (!fld)
continue;
TABLE_SHARE *s= fld->field->table->s;
const LString_i field_name= fld->field->field_name;
if (s->tmp_table ||
(s->versioned &&
(field_name == s->vers_start_field()->field_name ||
field_name == s->vers_end_field()->field_name)))
{
final_priv&= fld->have_privileges;
if (~fld->have_privileges & priv)
report_item= item;
continue;
}
final_priv&= fld->have_privileges;
if (~fld->have_privileges & priv)
report_item= item;
}
}
@ -2017,7 +2159,7 @@ bool check_key_in_view(THD *thd, TABLE_LIST *view)
RETURN
FALSE OK
TRUE error (is not sent to cliet)
TRUE error (is not sent to client)
*/
bool insert_view_fields(THD *thd, List<Item> *list, TABLE_LIST *view)
@ -2034,7 +2176,15 @@ bool insert_view_fields(THD *thd, List<Item> *list, TABLE_LIST *view)
{
Item_field *fld;
if ((fld= entry->item->field_for_view_update()))
{
TABLE_SHARE *s= fld->context->table_list->table->s;
LString_i field_name= fld->field_name;
if (s->versioned &&
(field_name == s->vers_start_field()->field_name ||
field_name == s->vers_end_field()->field_name))
continue;
list->push_back(fld, thd->mem_root);
}
else
{
my_error(ER_NON_INSERTABLE_TABLE, MYF(0), view->alias, "INSERT");
@ -2045,7 +2195,7 @@ bool insert_view_fields(THD *thd, List<Item> *list, TABLE_LIST *view)
}
/*
checking view md5 check suum
checking view md5 check sum
SINOPSYS
view_checksum()