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Merge mysql.com:/home/ram/work/b31137/b31137.5.0

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into  mysql.com:/home/ram/work/b31137/b31137.5.1
This commit is contained in:
ramil/ram@ramil.myoffice.izhnet.ru 2007-10-29 17:34:01 +04:00
commit b6a808bd1f
3 changed files with 21 additions and 9 deletions
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2
include/my_base.h
View file

@ -244,6 +244,8 @@ enum ha_base_keytype {
HA_BINARY_PACK_KEY | HA_FULLTEXT | HA_UNIQUE_CHECK | \
HA_SPATIAL | HA_NULL_ARE_EQUAL | HA_GENERATED_KEY)
#define HA_KEY_HAS_PART_KEY_SEG 65536 /* Key contains partial segments */
/* Automatic bits in key-flag */
#define HA_SPACE_PACK_USED 4 /* Test for if SPACE_PACK used */

26
sql/sql_table.cc
View file

@ -1782,7 +1782,8 @@ bool quick_rm_table(handlerton *base,const char *db,
/*
Sort keys in the following order:
- PRIMARY KEY
- UNIQUE keyws where all column are NOT NULL
- UNIQUE keys where all column are NOT NULL
- UNIQUE keys that don't contain partial segments
- Other UNIQUE keys
- Normal keys
- Fulltext keys
@ -1793,26 +1794,31 @@ bool quick_rm_table(handlerton *base,const char *db,
static int sort_keys(KEY *a, KEY *b)
{
if (a->flags & HA_NOSAME)
ulong a_flags= a->flags, b_flags= b->flags;
if (a_flags & HA_NOSAME)
{
if (!(b->flags & HA_NOSAME))
if (!(b_flags & HA_NOSAME))
return -1;
if ((a->flags ^ b->flags) & (HA_NULL_PART_KEY | HA_END_SPACE_KEY))
if ((a_flags ^ b_flags) & (HA_NULL_PART_KEY | HA_END_SPACE_KEY))
{
/* Sort NOT NULL keys before other keys */
return (a->flags & (HA_NULL_PART_KEY | HA_END_SPACE_KEY)) ? 1 : -1;
return (a_flags & (HA_NULL_PART_KEY | HA_END_SPACE_KEY)) ? 1 : -1;
}
if (a->name == primary_key_name)
return -1;
if (b->name == primary_key_name)
return 1;
/* Sort keys don't containing partial segments before others */
if ((a_flags ^ b_flags) & HA_KEY_HAS_PART_KEY_SEG)
return (a_flags & HA_KEY_HAS_PART_KEY_SEG) ? 1 : -1;
}
else if (b->flags & HA_NOSAME)
else if (b_flags & HA_NOSAME)
return 1; // Prefer b
if ((a->flags ^ b->flags) & HA_FULLTEXT)
if ((a_flags ^ b_flags) & HA_FULLTEXT)
{
return (a->flags & HA_FULLTEXT) ? 1 : -1;
return (a_flags & HA_FULLTEXT) ? 1 : -1;
}
/*
Prefer original key order. usable_key_parts contains here
@ -2876,6 +2882,10 @@ mysql_prepare_create_table(THD *thd, HA_CREATE_INFO *create_info,
else
key_info->flags|= HA_PACK_KEY;
}
/* Check if the key segment is partial, set the key flag accordingly */
if (length != sql_field->key_length)
key_info->flags|= HA_KEY_HAS_PART_KEY_SEG;
key_length+=length;
key_part_info++;

2
sql/structs.h
View file

@ -71,7 +71,7 @@ typedef struct st_key_part_info { /* Info about a key part */
typedef struct st_key {
uint key_length; /* Tot length of key */
uint flags; /* dupp key and pack flags */
ulong flags; /* dupp key and pack flags */
uint key_parts; /* How many key_parts */
uint extra_length;
uint usable_key_parts; /* Should normally be = key_parts */