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TABLE::update_virtual_field to compute just one vcol

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will be used later by storage engines (e.g. in MyISAM repair or in
InnoDB purge)
This commit is contained in:
Sergei Golubchik 2016-11-24 16:07:19 +01:00
parent 2cdcf141f5
commit c2b2cb8acd
4 changed files with 29 additions and 0 deletions
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12
sql/item.cc
View File

@ -985,6 +985,18 @@ bool Item_field::check_field_expression_processor(void *arg)
return 0;
}
bool Item_field::update_vcol_processor(void *arg)
{
MY_BITMAP *map= (MY_BITMAP *) arg;
if (field->vcol_info &&
!bitmap_fast_test_and_set(map, field->field_index))
{
field->vcol_info->expr_item->walk(&Item::update_vcol_processor, 0, arg);
field->vcol_info->expr_item->save_in_field(field, 0);
}
return 0;
}
bool Item::check_cols(uint c)
{

4
sql/item.h
View File

@ -1635,6 +1635,7 @@ public:
timezone-dependent expressions in a (sub)partitioning function.
*/
virtual bool check_valid_arguments_processor(void *arg) { return 0; }
virtual bool update_vcol_processor(void *arg) { return 0; }
/*============== End of Item processor list ======================*/
virtual Item *get_copy(THD *thd, MEM_ROOT *mem_root)=0;
@ -2580,6 +2581,7 @@ public:
bool enumerate_field_refs_processor(void *arg);
bool update_table_bitmaps_processor(void *arg);
bool switch_to_nullable_fields_processor(void *arg);
bool update_vcol_processor(void *arg);
bool check_vcol_func_processor(void *arg)
{
return mark_unsupported_function(field_name, arg, VCOL_FIELD_REF);
@ -5091,6 +5093,7 @@ public:
}
table_map used_tables() const { return (table_map)0L; }
Item_field *field_for_view_update() { return 0; }
bool update_vcol_processor(void *arg) { return 0; }
bool walk(Item_processor processor, bool walk_subquery, void *args)
{
@ -5170,6 +5173,7 @@ public:
(this->*processor)(args);
}
bool check_partition_func_processor(void *int_arg) {return TRUE;}
bool update_vcol_processor(void *arg) { return 0; }
bool check_vcol_func_processor(void *arg)
{
return mark_unsupported_function("values()", arg, VCOL_IMPOSSIBLE);

12
sql/table.cc
View File

@ -7333,6 +7333,18 @@ int TABLE::update_virtual_fields(enum_vcol_update_mode update_mode)
DBUG_RETURN(0);
}
int TABLE::update_virtual_field(Field *vf)
{
DBUG_ENTER("TABLE::update_virtual_field");
in_use->reset_arena_for_cached_items(expr_arena);
bitmap_clear_all(&tmp_set);
vf->vcol_info->expr_item->walk(&Item::update_vcol_processor, 0, &tmp_set);
vf->vcol_info->expr_item->save_in_field(vf, 0);
in_use->reset_arena_for_cached_items(0);
DBUG_RETURN(0);
}
/**
Update all DEFAULT and/or ON INSERT fields.

1
sql/table.h
View File

@ -1423,6 +1423,7 @@ public:
uint actual_n_key_parts(KEY *keyinfo);
ulong actual_key_flags(KEY *keyinfo);
int update_virtual_field(Field *vf);
int update_virtual_fields(enum_vcol_update_mode update_mode);
int update_default_fields(bool update, bool ignore_errors);
void reset_default_fields();