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Merge remote-tracking branch 'origin/10.4' into 10.5

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This commit is contained in:
Monty
2019-06-27 01:21:41 +03:00
parent 8e2a24bb33 bb702c2e4c
commit 1a41fc77dd
54 changed files with 1739 additions and 2891 deletions
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45
sql/handler.h
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@ -49,6 +49,11 @@ class Alter_info;
class Virtual_column_info;
class sequence_definition;
class Rowid_filter;
class Field_string;
class Field_varstring;
class Field_blob;
class Field_geom;
class Column_definition;
// the following is for checking tables
@ -324,10 +329,6 @@ enum enum_alter_inplace_result {
/* Safe for online backup */
#define HA_CAN_ONLINE_BACKUPS (1ULL << 56)
/** whether every data field explicitly stores length
(holds for InnoDB ROW_FORMAT=REDUNDANT) */
#define HA_EXTENDED_TYPES_CONVERSION (1ULL << 57)
/* Support native hash index */
#define HA_CAN_HASH_KEYS (1ULL << 58)
#define HA_LAST_TABLE_FLAG HA_CAN_HASH_KEYS
@ -710,13 +711,9 @@ typedef ulonglong alter_table_operations;
#define ALTER_VIRTUAL_COLUMN_TYPE (1ULL << 47)
#define ALTER_STORED_COLUMN_TYPE (1ULL << 48)
/**
Change column datatype in such way that new type has compatible
packed representation with old type, so it is theoretically
possible to perform change by only updating data dictionary
without changing table rows.
*/
#define ALTER_COLUMN_EQUAL_PACK_LENGTH (1ULL << 49)
// Engine can handle type change by itself in ALGORITHM=INPLACE
#define ALTER_COLUMN_TYPE_CHANGE_BY_ENGINE (1ULL << 49)
// Reorder column
#define ALTER_STORED_COLUMN_ORDER (1ULL << 50)
@ -4805,6 +4802,32 @@ public:
virtual bool is_clustering_key(uint index) { return false; }
/**
Some engines can perform column type conversion with ALGORITHM=INPLACE.
These functions check for such possibility.
Implementation could be based on Field_xxx::is_equal()
*/
virtual bool can_convert_string(const Field_string *field,
const Column_definition &new_type) const
{
return false;
}
virtual bool can_convert_varstring(const Field_varstring *field,
const Column_definition &new_type) const
{
return false;
}
virtual bool can_convert_blob(const Field_blob *field,
const Column_definition &new_type) const
{
return false;
}
virtual bool can_convert_geom(const Field_geom *field,
const Column_definition &new_type) const
{
return false;
}
protected:
Handler_share *get_ha_share_ptr();
void set_ha_share_ptr(Handler_share *arg_ha_share);