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5.1 repository of mskold. When mskold does a push these changes
will be propagated to the main repository and, within 24 hours after the
push, to the public repository.
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ChangeSet@stripped, 2008-02-08 17:11:33+01:00, mskold@stripped +2 -0
bug#31233 mysql_alter_table() fails to drop UNIQUE KEY
sql/mysql_priv.h@stripped, 2008-02-08 17:10:38+01:00, mskold@stripped +1 -0
bug#31233 mysql_alter_table() fails to drop UNIQUE KEY
sql/sql_table.cc@stripped, 2008-02-08 17:10:38+01:00, mskold@stripped +57 -12
bug#31233 mysql_alter_table() fails to drop UNIQUE KEY
diff -Nrup a/sql/mysql_priv.h b/sql/mysql_priv.h
--- a/sql/mysql_priv.h 2007-12-14 14:01:09 +01:00
+++ b/sql/mysql_priv.h 2008-02-08 17:10:38 +01:00
@@ -2146,6 +2146,7 @@ uint build_table_shadow_filename(char *b
#define FN_TO_IS_TMP (1 << 1)
#define FN_IS_TMP (FN_FROM_IS_TMP | FN_TO_IS_TMP)
#define NO_FRM_RENAME (1 << 2)
+#define FN_FRM_ONLY (1 << 3)
/* from hostname.cc */
struct in_addr;
diff -Nrup a/sql/sql_table.cc b/sql/sql_table.cc
--- a/sql/sql_table.cc 2007-12-17 13:39:54 +01:00
+++ b/sql/sql_table.cc 2008-02-08 17:10:38 +01:00
@@ -1831,8 +1831,9 @@ bool quick_rm_table(handlerton *base,con
if (my_delete(path,MYF(0)))
error= 1; /* purecov: inspected */
path[path_length - reg_ext_length]= '\0'; // Remove reg_ext
- DBUG_RETURN(ha_delete_table(current_thd, base, path, db, table_name, 0) ||
- error);
+ if (!(flags & FN_FRM_ONLY))
+ error|= ha_delete_table(current_thd, base, path, db, table_name, 0);
+ DBUG_RETURN(error);
}
/*
@@ -5038,6 +5039,7 @@ err:
index_drop_count OUT The number of elements in the array.
index_add_buffer OUT An array of offsets into key_info_buffer.
index_add_count OUT The number of elements in the array.
+ candidate_key_count OUT The number of candidate keys in original table.
DESCRIPTION
'table' (first argument) contains information of the original
@@ -5068,7 +5070,8 @@ compare_tables(TABLE *table,
enum_alter_table_change_level *need_copy_table,
KEY **key_info_buffer,
uint **index_drop_buffer, uint *index_drop_count,
- uint **index_add_buffer, uint *index_add_count)
+ uint **index_add_buffer, uint *index_add_count,
+ uint *candidate_key_count)
{
Field **f_ptr, *field;
uint changes= 0, tmp;
@@ -5082,6 +5085,7 @@ compare_tables(TABLE *table,
create_info->varchar will be reset in mysql_prepare_create_table.
*/
bool varchar= create_info->varchar;
+ bool not_nullable= true;
DBUG_ENTER("compare_tables");
{
@@ -5220,6 +5224,7 @@ compare_tables(TABLE *table,
*/
*index_drop_count= 0;
*index_add_count= 0;
+ *candidate_key_count= 0;
for (table_key= table->key_info; table_key < table_key_end; table_key++)
{
KEY_PART_INFO *table_part;
@@ -5247,6 +5252,8 @@ compare_tables(TABLE *table,
(table_key->key_parts != new_key->key_parts))
goto index_changed;
+
+ not_nullable= true;
/*
Check that the key parts remain compatible between the old and
new tables.
@@ -5255,6 +5262,8 @@ compare_tables(TABLE *table,
table_part < table_part_end;
table_part++, new_part++)
{
+ not_nullable= not_nullable && (! table_part->field->maybe_null());
+
/*
Key definition has changed if we are using a different field or
if the used key part length is different. We know that the fields
@@ -5264,6 +5273,15 @@ compare_tables(TABLE *table,
(table_part->fieldnr - 1 != new_part->fieldnr))
goto index_changed;
}
+
+ /*
+ Count all candidate keys,
+ i.e all non-nullable unique indexes
+ */
+ if ((table_key->flags & HA_NOSAME) && not_nullable)
+ (*candidate_key_count)++;
+
+
continue;
index_changed:
@@ -5851,13 +5869,16 @@ bool mysql_alter_table(THD *thd,char *ne
uint *index_drop_buffer;
uint index_add_count;
uint *index_add_buffer;
+ uint candidate_key_count;
bool committed= 0;
+ bool no_pk;
DBUG_ENTER("mysql_alter_table");
LINT_INIT(index_add_count);
LINT_INIT(index_drop_count);
LINT_INIT(index_add_buffer);
LINT_INIT(index_drop_buffer);
+ LINT_INIT(candidate_key_count);
/*
Check if we attempt to alter mysql.slow_log or
@@ -6268,7 +6289,8 @@ view_err:
&need_copy_table_res,
&key_info_buffer,
&index_drop_buffer, &index_drop_count,
- &index_add_buffer, &index_add_count))
+ &index_add_buffer, &index_add_count,
+ &candidate_key_count))
goto err;
if (need_copy_table == ALTER_TABLE_METADATA_ONLY)
@@ -6302,9 +6324,11 @@ view_err:
DBUG_PRINT("info", ("index dropped: '%s'", key->name));
if (key->flags & HA_NOSAME)
{
- /* Unique key. Check for "PRIMARY". */
- if (! my_strcasecmp(system_charset_info,
- key->name, primary_key_name))
+ /*
+ Unique key. Check for "PRIMARY"
+ or if dropping last unique key.
+ */
+ if ((uint) (key - table->key_info) != table->s->primary_key)
{
/* Primary key. */
needed_online_flags|= HA_ONLINE_DROP_PK_INDEX;
@@ -6325,7 +6349,8 @@ view_err:
needed_fast_flags|= HA_ONLINE_DROP_INDEX_NO_WRITES;
}
}
-
+ no_pk= ((table->s->primary_key == MAX_KEY) ||
+ (needed_online_flags & HA_ONLINE_DROP_PK_INDEX));
/* Check added indexes. */
for (idx_p= index_add_buffer, idx_end_p= idx_p + index_add_count;
idx_p < idx_end_p;
@@ -6335,14 +6360,19 @@ view_err:
DBUG_PRINT("info", ("index added: '%s'", key->name));
if (key->flags & HA_NOSAME)
{
- /* Unique key. Check for "PRIMARY". */
- if (! my_strcasecmp(system_charset_info,
- key->name, primary_key_name))
+ /*
+ Unique key. Check for "PRIMARY"
+ or if adding first unique key
+ */
+ if ((! my_strcasecmp(system_charset_info,
+ key->name, primary_key_name)) ||
+ (no_pk && candidate_key_count == 0))
{
/* Primary key. */
needed_online_flags|= HA_ONLINE_ADD_PK_INDEX;
needed_fast_flags|= HA_ONLINE_ADD_PK_INDEX_NO_WRITES;
pk_changed++;
+ no_pk= false;
}
else
{
@@ -6359,6 +6389,18 @@ view_err:
}
}
+ if ((candidate_key_count > 0) &&
+ (needed_online_flags & HA_ONLINE_DROP_PK_INDEX))
+ {
+ /*
+ Dropped primary key when there is some other unique
+ not null key that should be converted to primary key
+ */
+ needed_online_flags|= HA_ONLINE_ADD_PK_INDEX;
+ needed_fast_flags|= HA_ONLINE_ADD_PK_INDEX_NO_WRITES;
+ pk_changed= 2;
+ }
+
/*
Online or fast add/drop index is possible only if
the primary key is not added and dropped in the same statement.
@@ -6857,7 +6899,10 @@ err1:
close_temporary_table(thd, new_table, 1, 1);
}
else
- VOID(quick_rm_table(new_db_type, new_db, tmp_name, FN_IS_TMP));
+ VOID(quick_rm_table(new_db_type, new_db, tmp_name,
+ create_info->frm_only
+ ? FN_IS_TMP | FN_FRM_ONLY
+ : FN_IS_TMP));
err:
/*
