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WL#1563 - Modify MySQL to support fast CREATE/DROP INDEX 

NDB cluster is not fully supported. This will be added with
WL 1892 (NDB Handler: Add support for CREATE/DROP INDEX).
Some preparatory code for this is already present though.
A change for the "duplicate key" error message is planned
for another changeset.


include/my_base.h:
  WL#1563 - Modify MySQL to support fast CREATE/DROP INDEX
  Defined a mask of flags which must be the same for two indexes
  if they should compare as compatible.
  Added an error number for a new drop index error message.
mysql-test/r/key.result:
  WL#1563 - Modify MySQL to support fast CREATE/DROP INDEX
  The test result.
mysql-test/t/key.test:
  WL#1563 - Modify MySQL to support fast CREATE/DROP INDEX
  The test case.
sql/handler.cc:
  WL#1563 - Modify MySQL to support fast CREATE/DROP INDEX
  Prepared for a later change in an error message:
  Replace index number by index name for "duplicate key" error.
  Added handling for the new drop index error message.
sql/handler.h:
  WL#1563 - Modify MySQL to support fast CREATE/DROP INDEX
  Added new flags and methods.
  Removed old flags and methods (from the last attempt).
sql/share/errmsg.txt:
  WL#1563 - Modify MySQL to support fast CREATE/DROP INDEX
  Added a new error message for drop index.
sql/sql_table.cc:
  WL#1563 - Modify MySQL to support fast CREATE/DROP INDEX
  Moved definitions to the top of the file.
  In mysql_prepare_table() allow an index to have the name
  "PRIMARY" if it has the key type "Key::PRIMARY".
  Added a parenthesis for readability.
  Removed old code from the last attempt.
  Some changes to compare_tables():
  - Input parameter "List<Key> *key_list" is replaced by
    "KEY *key_info_buffer, uint key_count".
  - Output parameters added: "index_drop_buffer/index_drop_count"
    and "index_add_buffer/index_add_count".
  - Key comparison must now find matching keys in changed
    old and new key lists.
  - Key comparison of a key is easier now because both old
    and new keys are of type 'KEY'.
  Call mysql_prepare_table() before compare_tables(). The
  translated KEY structs are needed at some places now.
  Inserted a code segment for checking alter_table_flags().
  Removed mysql_prepare_table() from the 'partition' branches
  (it is done above now).
  Removed a pair of unnecessary braces.
  Inserted a code segment for executing fast add/drop index.
  Made close of table dependent on whether it was opened.
  Prepared for NDB cluster support.
  Fixed commit to be called outside of LOCK_open.
parent 69f4b6a9
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Showing with 704 additions and 323 deletions
include/my_base.h
View file @ 085c97c1
......@@ -206,6 +206,11 @@ enum ha_base_keytype {
#define HA_NULL_ARE_EQUAL 2048 /* NULL in key are cmp as equal */
#define HA_GENERATED_KEY 8192 /* Automaticly generated key */
/* The combination of the above can be used for key type comparison. */
#define HA_KEYFLAG_MASK (HA_NOSAME | HA_PACK_KEY | HA_AUTO_KEY | \
HA_BINARY_PACK_KEY | HA_FULLTEXT | HA_UNIQUE_CHECK | \
HA_SPATIAL | HA_NULL_ARE_EQUAL | HA_GENERATED_KEY)
/* Automatic bits in key-flag */
#define HA_SPACE_PACK_USED 4 /* Test for if SPACE_PACK used */
......@@ -349,8 +354,9 @@ enum ha_base_keytype {
#define HA_ERR_NO_PARTITION_FOUND 160 /* There's no partition in table for
given value */
#define HA_ERR_RBR_LOGGING_FAILED 161 /* Row-based binlogging of row failed */
#define HA_ERR_DROP_INDEX_FK 162 /* Index needed in foreign key constr. */
#define HA_ERR_LAST 161 /* Copy last error no */
#define HA_ERR_LAST 162 /* Copy last error no */
/* Add error numbers before HA_ERR_LAST and change it accordingly. */
#define HA_ERR_ERRORS (HA_ERR_LAST - HA_ERR_FIRST + 1)
......
mysql-test/r/key.result
View file @ 085c97c1
......@@ -396,3 +396,71 @@ a int(11) NO PRI
b varchar(20) NO MUL
c varchar(20) NO
drop table t1;
create table t1 (
c1 int,
c2 char(12),
c3 varchar(123),
c4 timestamp,
index (c1),
index i1 (c1),
index i2 (c2),
index i3 (c3),
unique i4 (c4),
index i5 (c1, c2, c3, c4),
primary key (c2, c3),
index (c2, c4));
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`c1` int(11) default NULL,
`c2` char(12) NOT NULL default '',
`c3` varchar(123) NOT NULL default '',
`c4` timestamp NOT NULL default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP,
PRIMARY KEY (`c2`,`c3`),
UNIQUE KEY `i4` (`c4`),
KEY `c1` (`c1`),
KEY `i1` (`c1`),
KEY `i2` (`c2`),
KEY `i3` (`c3`),
KEY `i5` (`c1`,`c2`,`c3`,`c4`),
KEY `c2` (`c2`,`c4`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1
alter table t1 drop index c1;
alter table t1 add index (c1);
alter table t1 add index (c1);
alter table t1 drop index i3;
alter table t1 add index i3 (c3);
alter table t1 drop index i2, drop index i4;
alter table t1 add index i2 (c2), add index i4 (c4);
alter table t1 drop index i2, drop index i4, add index i6 (c2, c4);
alter table t1 add index i2 (c2), add index i4 (c4), drop index i6;
alter table t1 drop index i2, drop index i4, add unique i4 (c4);
alter table t1 add index i2 (c2), drop index i4, add index i4 (c4);
alter table t1 drop index c2, add index (c2(4),c3(7));
alter table t1 drop index c2, add index (c2(4),c3(7));
alter table t1 add primary key (c1, c2), drop primary key;
alter table t1 drop primary key;
alter table t1 add primary key (c1, c2), drop primary key;
ERROR 42000: Can't DROP 'PRIMARY'; check that column/key exists
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`c1` int(11) NOT NULL default '0',
`c2` char(12) NOT NULL default '',
`c3` varchar(123) NOT NULL default '',
`c4` timestamp NOT NULL default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP,
KEY `i1` (`c1`),
KEY `i5` (`c1`,`c2`,`c3`,`c4`),
KEY `c1` (`c1`),
KEY `c1_2` (`c1`),
KEY `i3` (`c3`),
KEY `i2` (`c2`),
KEY `i4` (`c4`),
KEY `c2` (`c2`(4),`c3`(7))
) ENGINE=MyISAM DEFAULT CHARSET=latin1
insert into t1 values(1, 'a', 'a', NULL);
insert into t1 values(1, 'b', 'b', NULL);
alter table t1 drop index i3, drop index i2, drop index i1;
alter table t1 add index i3 (c3), add index i2 (c2), add unique index i1 (c1);
ERROR 23000: Duplicate entry '1' for key 1
drop table t1;
mysql-test/t/key.test
View file @ 085c97c1
......@@ -372,3 +372,61 @@ desc t1;
drop table t1;
# End of 4.1 tests
#
# WL#1563 - Modify MySQL to support on-line CREATE/DROP INDEX
# To test if this really works, you need to run with --debug
# and check the trace file.
#
# Create a table with named and unnamed indexes.
create table t1 (
c1 int,
c2 char(12),
c3 varchar(123),
c4 timestamp,
index (c1),
index i1 (c1),
index i2 (c2),
index i3 (c3),
unique i4 (c4),
index i5 (c1, c2, c3, c4),
primary key (c2, c3),
index (c2, c4));
show create table t1;
# Some simple tests.
alter table t1 drop index c1;
alter table t1 add index (c1);
# This creates index 'c1_2'.
alter table t1 add index (c1);
alter table t1 drop index i3;
alter table t1 add index i3 (c3);
# Two indexes at the same time.
alter table t1 drop index i2, drop index i4;
alter table t1 add index i2 (c2), add index i4 (c4);
# Three indexes, one of them reversely.
alter table t1 drop index i2, drop index i4, add index i6 (c2, c4);
alter table t1 add index i2 (c2), add index i4 (c4), drop index i6;
# include an unique index.
alter table t1 drop index i2, drop index i4, add unique i4 (c4);
alter table t1 add index i2 (c2), drop index i4, add index i4 (c4);
# Modify an index by changing its definition.
alter table t1 drop index c2, add index (c2(4),c3(7));
# Change nothing. The new key definition is the same as the old one.
alter table t1 drop index c2, add index (c2(4),c3(7));
# Test primary key handling.
alter table t1 add primary key (c1, c2), drop primary key;
alter table t1 drop primary key;
# Drop is checked first. Primary key must exist.
--error 1091
alter table t1 add primary key (c1, c2), drop primary key;
show create table t1;
# Insert non-unique values.
insert into t1 values(1, 'a', 'a', NULL);
insert into t1 values(1, 'b', 'b', NULL);
# Drop some indexes for new adds.
alter table t1 drop index i3, drop index i2, drop index i1;
# Add indexes, one is unique on non-unique values.
--error 1062
alter table t1 add index i3 (c3), add index i2 (c2), add unique index i1 (c1);
drop table t1;
sql/handler.cc
View file @ 085c97c1
......@@ -1851,7 +1851,12 @@ void handler::print_error(int error, myf errflag)
str.length(max_length-4);
str.append(STRING_WITH_LEN("..."));
}
#ifdef XXX_TO_BE_DONE_BY_A_FOLLOWUP_OF_WL1563
my_printf_error(ER_DUP_ENTRY, "Duplicate entry '%s' for key '%s'",
MYF(0), str.c_ptr(), table->key_info[key_nr].name);
#else
my_error(ER_DUP_ENTRY, MYF(0), str.c_ptr(), key_nr+1);
#endif
DBUG_VOID_RETURN;
}
textno=ER_DUP_KEY;
......@@ -1936,6 +1941,15 @@ void handler::print_error(int error, myf errflag)
case HA_ERR_RBR_LOGGING_FAILED:
textno= ER_BINLOG_ROW_LOGGING_FAILED;
break;
case HA_ERR_DROP_INDEX_FK:
{
const char *ptr= "???";
uint key_nr= get_dup_key(error);
if ((int) key_nr >= 0)
ptr= table->key_info[key_nr].name;
my_error(ER_DROP_INDEX_FK, MYF(0), ptr);
DBUG_VOID_RETURN;
}
default:
{
/* The error was "unknown" to this function.
......@@ -1984,7 +1998,7 @@ uint handler::get_dup_key(int error)
DBUG_ENTER("handler::get_dup_key");
table->file->errkey = (uint) -1;
if (error == HA_ERR_FOUND_DUPP_KEY || error == HA_ERR_FOUND_DUPP_UNIQUE ||
error == HA_ERR_NULL_IN_SPATIAL)
error == HA_ERR_NULL_IN_SPATIAL || error == HA_ERR_DROP_INDEX_FK)
info(HA_STATUS_ERRKEY | HA_STATUS_NO_LOCK);
DBUG_RETURN(table->file->errkey);
}
......
sql/handler.h
View file @ 085c97c1
......@@ -110,8 +110,29 @@
#define HA_KEYREAD_ONLY 64 /* Support HA_EXTRA_KEYREAD */
/* bits in alter_table_flags */
#define HA_ONLINE_ADD_EMPTY_PARTITION 1
#define HA_ONLINE_DROP_PARTITION 2
#define HA_ONLINE_ADD_EMPTY_PARTITION 0x00000001
#define HA_ONLINE_DROP_PARTITION 0x00000002
/*
These bits are set if different kinds of indexes can be created
off-line without re-create of the table (but with a table lock).
*/
#define HA_ONLINE_ADD_INDEX_NO_WRITES 0x00000004 /*add index w/lock*/
#define HA_ONLINE_DROP_INDEX_NO_WRITES 0x00000008 /*drop index w/lock*/
#define HA_ONLINE_ADD_UNIQUE_INDEX_NO_WRITES 0x00000010 /*add unique w/lock*/
#define HA_ONLINE_DROP_UNIQUE_INDEX_NO_WRITES 0x00000020 /*drop uniq. w/lock*/
#define HA_ONLINE_ADD_PK_INDEX_NO_WRITES 0x00000040 /*add prim. w/lock*/
#define HA_ONLINE_DROP_PK_INDEX_NO_WRITES 0x00000080 /*drop prim. w/lock*/
/*
These are set if different kinds of indexes can be created on-line
(without a table lock). If a handler is capable of one or more of
these, it should also set the corresponding *_NO_WRITES bit(s).
*/
#define HA_ONLINE_ADD_INDEX 0x00000100 /*add index online*/
#define HA_ONLINE_DROP_INDEX 0x00000200 /*drop index online*/
#define HA_ONLINE_ADD_UNIQUE_INDEX 0x00000400 /*add unique online*/
#define HA_ONLINE_DROP_UNIQUE_INDEX 0x00000800 /*drop uniq. online*/
#define HA_ONLINE_ADD_PK_INDEX 0x00001000 /*add prim. online*/
#define HA_ONLINE_DROP_PK_INDEX 0x00002000 /*drop prim. online*/
/*
Index scan will not return records in rowid order. Not guaranteed to be
......@@ -134,16 +155,6 @@
*/
#define MAX_HA 15
/*
Bits in index_ddl_flags(KEY *wanted_index)
for what ddl you can do with index
If none is set, the wanted type of index is not supported
by the handler at all. See WorkLog 1563.
*/
#define HA_DDL_SUPPORT 1 /* Supported by handler */
#define HA_DDL_WITH_LOCK 2 /* Can create/drop with locked table */
#define HA_DDL_ONLINE 4 /* Can create/drop without lock */
/*
Parameters for open() (in register form->filestat)
HA_GET_INFO does an implicit HA_ABORT_IF_LOCKED
......@@ -1442,11 +1453,13 @@ class handler :public Sql_alloc
virtual void set_part_info(partition_info *part_info) { return; }
#endif
virtual ulong index_flags(uint idx, uint part, bool all_parts) const =0;
virtual ulong index_ddl_flags(KEY *wanted_index) const
{ return (HA_DDL_SUPPORT); }
virtual int add_index(TABLE *table_arg, KEY *key_info, uint num_of_keys)
{ return (HA_ERR_WRONG_COMMAND); }
virtual int drop_index(TABLE *table_arg, uint *key_num, uint num_of_keys)
virtual int prepare_drop_index(TABLE *table_arg, uint *key_num,
uint num_of_keys)
{ return (HA_ERR_WRONG_COMMAND); }
virtual int final_drop_index(TABLE *table_arg)
{ return (HA_ERR_WRONG_COMMAND); }
uint max_record_length() const
......
sql/share/errmsg.txt
View file @ 085c97c1
......@@ -5779,3 +5779,6 @@ ER_EVENT_SAME_NAME
eng "Same old and new event name"
ER_EVENT_DATA_TOO_LONG
eng "Data for column '%s' too long"
ER_DROP_INDEX_FK
eng "Cannot drop index '%-.64s': needed in a foreign key constraint"
ger "Kann Index '%-.64s' nicht lschen: wird fr einen einen Fremdschlssel bentigt"
sql/sql_table.cc
View file @ 085c97c1
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