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-rw-r--r--sql/item.h110
1 files changed, 101 insertions, 9 deletions
diff --git a/sql/item.h b/sql/item.h
index fb7edfd3d1a..d178d9f97d6 100644
--- a/sql/item.h
+++ b/sql/item.h
@@ -301,6 +301,28 @@ public:
}
};
+class Name_resolution_context_backup
+{
+ Name_resolution_context &ctx;
+ TABLE_LIST &table_list;
+ table_map save_map;
+ Name_resolution_context_state ctx_state;
+
+public:
+ Name_resolution_context_backup(Name_resolution_context &_ctx, TABLE_LIST &_table_list)
+ : ctx(_ctx), table_list(_table_list), save_map(_table_list.map)
+ {
+ ctx_state.save_state(&ctx, &table_list);
+ ctx.table_list= &table_list;
+ ctx.first_name_resolution_table= &table_list;
+ }
+ ~Name_resolution_context_backup()
+ {
+ ctx_state.restore_state(&ctx, &table_list);
+ table_list.map= save_map;
+ }
+};
+
/*
This enum is used to report information about monotonicity of function
@@ -541,7 +563,6 @@ public:
String_copier_for_item(THD *thd): m_thd(thd) { }
};
-
class Item: public Value_source,
public Type_all_attributes
{
@@ -774,6 +795,10 @@ public:
return type_handler()->field_type();
}
virtual const Type_handler *type_handler() const= 0;
+ virtual uint field_flags() const
+ {
+ return 0;
+ }
const Type_handler *type_handler_for_comparison() const
{
return type_handler()->type_handler_for_comparison();
@@ -1742,6 +1767,10 @@ public:
virtual Item_field *field_for_view_update() { return 0; }
+ virtual Item *vers_transformer(THD *thd, uchar *)
+ { return this; }
+ virtual bool vers_trx_id() const
+ { return false; }
virtual Item *neg_transformer(THD *thd) { return NULL; }
virtual Item *update_value_transformer(THD *thd, uchar *select_arg)
{ return this; }
@@ -2803,6 +2832,10 @@ public:
return field->type_handler();
}
TYPELIB *get_typelib() const { return field->get_typelib(); }
+ uint32 field_flags() const
+ {
+ return field->flags;
+ }
enum_monotonicity_info get_monotonicity_info() const
{
return MONOTONIC_STRICT_INCREASING;
@@ -2899,6 +2932,8 @@ public:
uint32 max_display_length() const { return field->max_display_length(); }
Item_field *field_for_view_update() { return this; }
int fix_outer_field(THD *thd, Field **field, Item **reference);
+ virtual Item *vers_transformer(THD *thd, uchar *);
+ virtual bool vers_trx_id() const;
virtual Item *update_value_transformer(THD *thd, uchar *select_arg);
Item *derived_field_transformer_for_having(THD *thd, uchar *arg);
Item *derived_field_transformer_for_where(THD *thd, uchar *arg);
@@ -3463,6 +3498,14 @@ public:
name.str= str_arg; name.length= safe_strlen(name.str);
fixed= 1;
}
+ Item_int(THD *thd, const char *str_arg,longlong i,uint length, bool flag):
+ Item_num(thd), value(i)
+ {
+ max_length=length;
+ name.str= str_arg; name.length= safe_strlen(name.str);
+ fixed= 1;
+ unsigned_flag= flag;
+ }
Item_int(THD *thd, const char *str_arg, uint length=64);
enum Type type() const { return INT_ITEM; }
const Type_handler *type_handler() const
@@ -3913,10 +3956,10 @@ class Item_return_date_time :public Item_partition_func_safe_string
enum_field_types date_time_field_type;
public:
Item_return_date_time(THD *thd, const char *name_arg, uint length_arg,
- enum_field_types field_type_arg):
+ enum_field_types field_type_arg, uint dec_arg= 0):
Item_partition_func_safe_string(thd, name_arg, length_arg, &my_charset_bin),
date_time_field_type(field_type_arg)
- { decimals= 0; }
+ { decimals= dec_arg; }
const Type_handler *type_handler() const
{
return Type_handler::get_handler_by_field_type(date_time_field_type);
@@ -4157,6 +4200,13 @@ public:
{ return val_decimal_from_date(decimal_value); }
int save_in_field(Field *field, bool no_conversions)
{ return save_date_in_field(field, no_conversions); }
+ void set_time(MYSQL_TIME *ltime)
+ {
+ cached_time= *ltime;
+ }
+ bool operator>(const MYSQL_TIME &ltime) const;
+ bool operator<(const MYSQL_TIME &ltime) const;
+ bool operator==(const MYSQL_TIME &ltime) const;
};
@@ -4216,7 +4266,7 @@ public:
class Item_datetime_literal: public Item_temporal_literal
{
public:
- Item_datetime_literal(THD *thd, MYSQL_TIME *ltime, uint dec_arg):
+ Item_datetime_literal(THD *thd, MYSQL_TIME *ltime, uint dec_arg= 0):
Item_temporal_literal(thd, ltime, dec_arg)
{
max_length= MAX_DATETIME_WIDTH + (decimals ? decimals + 1 : 0);
@@ -4716,6 +4766,12 @@ public:
return 0;
return cleanup_processor(arg);
}
+ virtual bool vers_trx_id() const
+ {
+ DBUG_ASSERT(ref);
+ DBUG_ASSERT(*ref);
+ return (*ref)->vers_trx_id();
+ }
};
@@ -5232,6 +5288,7 @@ public:
#include "item_xmlfunc.h"
#include "item_jsonfunc.h"
#include "item_create.h"
+#include "item_vers.h"
#endif
/**
@@ -6172,37 +6229,59 @@ class Item_type_holder: public Item,
{
protected:
TYPELIB *enum_set_typelib;
+private:
+ void init_flags(Item *item)
+ {
+ if (item->real_type() == Item::FIELD_ITEM)
+ {
+ Item_field *item_field= (Item_field *)item->real_item();
+ m_flags|= (item_field->field->flags &
+ (VERS_SYS_START_FLAG | VERS_SYS_END_FLAG));
+ // TODO: additional field flag?
+ m_vers_trx_id= item_field->field->vers_trx_id();
+ }
+ }
public:
Item_type_holder(THD *thd, Item *item)
:Item(thd, item),
Type_handler_hybrid_field_type(item->real_type_handler()),
- enum_set_typelib(0)
+ enum_set_typelib(0),
+ m_flags(0),
+ m_vers_trx_id(false)
{
DBUG_ASSERT(item->fixed);
maybe_null= item->maybe_null;
+ init_flags(item);
}
Item_type_holder(THD *thd,
- const LEX_CSTRING *name_arg,
+ Item *item,
const Type_handler *handler,
const Type_all_attributes *attr,
bool maybe_null_arg)
:Item(thd),
Type_handler_hybrid_field_type(handler),
Type_geometry_attributes(handler, attr),
- enum_set_typelib(attr->get_typelib())
+ enum_set_typelib(attr->get_typelib()),
+ m_flags(0),
+ m_vers_trx_id(false)
{
- name= *name_arg;
+ name= item->name;
Type_std_attributes::set(*attr);
maybe_null= maybe_null_arg;
+ init_flags(item);
}
const Type_handler *type_handler() const
{
- const Type_handler *handler= Type_handler_hybrid_field_type::type_handler();
+ const Type_handler *handler= m_vers_trx_id ?
+ &type_handler_vers_trx_id :
+ Type_handler_hybrid_field_type::type_handler();
return handler->type_handler_for_item_field();
}
const Type_handler *real_type_handler() const
{
+ if (m_vers_trx_id)
+ return &type_handler_vers_trx_id;
return Type_handler_hybrid_field_type::type_handler();
}
@@ -6227,6 +6306,19 @@ public:
Type_geometry_attributes::set_geometry_type(type);
}
Item* get_copy(THD *thd) { return 0; }
+
+private:
+ uint m_flags;
+ bool m_vers_trx_id;
+public:
+ uint32 field_flags() const
+ {
+ return m_flags;
+ }
+ virtual bool vers_trx_id() const
+ {
+ return m_vers_trx_id;
+ }
};
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