Set rocksdb_large_prefix to ON and deprecate this system variable (pe…

…rcona#1322)

Upstream commit ID: facebook/mysql-5.6@e4751ca
PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951)

Summary:
This variable was introduced to mirror innodb_large_prefix, which was deprecated in 5.7 and removed in 8.0, and no longer serves any real purpose, nor there is anything to gain with its 'OFF' setting, which is also incompatible with the data dictionary schema. Thus 1) change the default to 'ON'; 2) deprecate it.

Squash with 749f1dc5ef0327e55616441b399000510db9a54d

Pull Request resolved: facebook/mysql-5.6#1322

Differential Revision: D46773511

fbshipit-source-id: f7b43bc6db767baa8803fa6932e3592d23464fd3

mysql-test/suite/rocksdb/r/dup_key_update.result

@@ -176,8 +176,6 @@ id1	id2	id3
 9	17	9
 DROP TABLE t1;
 DROP TABLE t2;
-set @orig_rocksdb_large_prefix=@@global.rocksdb_large_prefix;
-set @@global.rocksdb_large_prefix=1;
 CREATE TABLE t1 (id1 varchar(128) CHARACTER SET latin1 COLLATE latin1_bin,
 id2 varchar(256) CHARACTER SET utf8mb3 COLLATE utf8mb3_bin,
 id3 varchar(200) CHARACTER SET latin1 COLLATE latin1_swedish_ci,
@@ -194,7 +192,6 @@ UNIQUE KEY (id3, id1) COMMENT 'cfname=rev:cf') ENGINE=ROCKSDB;
 Warnings:
 Warning	1287	'utf8mb3' is deprecated and will be removed in a future release. Please use utf8mb4 instead
 Warning	3778	'utf8mb3_bin' is a collation of the deprecated character set UTF8MB3. Please consider using UTF8MB4 with an appropriate collation instead.
-set @@global.rocksdb_large_prefix=@orig_rocksdb_large_prefix;
 INSERT INTO t1 VALUES (1, 1, 1) ON DUPLICATE KEY UPDATE id2 = 9;
 SELECT * FROM t1 WHERE id1 = 1;
 id1	id2	id3

mysql-test/suite/rocksdb/r/index.result

@@ -43,6 +43,8 @@ ALTER TABLE t1 DROP KEY a;
 DROP TABLE t1;
 set @orig_rocksdb_large_prefix=@@global.rocksdb_large_prefix;
 set @@global.rocksdb_large_prefix=0;
+Warnings:
+Warning	131	using rocksdb_large_prefix is deprecated and it will be removed in a future release
 CREATE TABLE t1 (
 a BLOB(1024),
 KEY (a(767))
@@ -54,6 +56,8 @@ KEY (a(768))
 ) ENGINE=ROCKSDB;
 ERROR 42000: Specified key was too long; max key length is 767 bytes
 set @@global.rocksdb_large_prefix=1;
+Warnings:
+Warning	131	using rocksdb_large_prefix is deprecated and it will be removed in a future release
 CREATE TABLE t1 (
 a BLOB(4096),
 KEY (a(3072))
@@ -65,6 +69,8 @@ KEY (a(3073))
 ) ENGINE=ROCKSDB;
 ERROR 42000: Specified key was too long; max key length is 3072 bytes
 set @@global.rocksdb_large_prefix=@orig_rocksdb_large_prefix;
+Warnings:
+Warning	131	using rocksdb_large_prefix is deprecated and it will be removed in a future release
 #
 # Issue #376: MyRocks: ORDER BY optimizer is unable to use the index extension
 #

mysql-test/suite/rocksdb/r/index_primary.result

@@ -47,6 +47,8 @@ t1	0	PRIMARY	1	b	A	#	NULL	NULL		SE_SPECIFIC			YES	NULL
 DROP TABLE t1;
 set @orig_rocksdb_large_prefix=@@global.rocksdb_large_prefix;
 set @@global.rocksdb_large_prefix=0;
+Warnings:
+Warning	131	using rocksdb_large_prefix is deprecated and it will be removed in a future release
 CREATE TABLE t1 (
 a BLOB(1024),
 PRIMARY KEY (a(767))
@@ -58,6 +60,8 @@ PRIMARY KEY (a(768))
 ) ENGINE=ROCKSDB;
 ERROR 42000: Specified key was too long; max key length is 767 bytes
 set @@global.rocksdb_large_prefix=1;
+Warnings:
+Warning	131	using rocksdb_large_prefix is deprecated and it will be removed in a future release
 CREATE TABLE t1 (
 a BLOB(4096),
 PRIMARY KEY (a(3072))
@@ -69,3 +73,5 @@ PRIMARY KEY (a(3073))
 ) ENGINE=ROCKSDB;
 ERROR 42000: Specified key was too long; max key length is 3072 bytes
 set @@global.rocksdb_large_prefix=@orig_rocksdb_large_prefix;
+Warnings:
+Warning	131	using rocksdb_large_prefix is deprecated and it will be removed in a future release

mysql-test/suite/rocksdb/r/index_type_btree.result

@@ -51,6 +51,8 @@ ALTER TABLE t1 DROP KEY a;
 DROP TABLE t1;
 set @orig_rocksdb_large_prefix=@@global.rocksdb_large_prefix;
 set @@global.rocksdb_large_prefix=0;
+Warnings:
+Warning	131	using rocksdb_large_prefix is deprecated and it will be removed in a future release
 CREATE TABLE t1 (
 a BLOB(1024),
 KEY (a(767))
@@ -62,6 +64,8 @@ KEY (a(768))
 ) ENGINE=ROCKSDB;
 ERROR 42000: Specified key was too long; max key length is 767 bytes
 set @@global.rocksdb_large_prefix=1;
+Warnings:
+Warning	131	using rocksdb_large_prefix is deprecated and it will be removed in a future release
 CREATE TABLE t1 (
 a BLOB(4096),
 KEY (a(3072))
@@ -73,3 +77,5 @@ KEY (a(3073))
 ) ENGINE=ROCKSDB;
 ERROR 42000: Specified key was too long; max key length is 3072 bytes
 set @@global.rocksdb_large_prefix=@orig_rocksdb_large_prefix;
+Warnings:
+Warning	131	using rocksdb_large_prefix is deprecated and it will be removed in a future release

mysql-test/suite/rocksdb/r/index_type_hash.result

@@ -51,6 +51,8 @@ ALTER TABLE t1 DROP KEY a;
 DROP TABLE t1;
 set @orig_rocksdb_large_prefix=@@global.rocksdb_large_prefix;
 set @@global.rocksdb_large_prefix=0;
+Warnings:
+Warning	131	using rocksdb_large_prefix is deprecated and it will be removed in a future release
 CREATE TABLE t1 (
 a BLOB(1024),
 KEY (a(767))
@@ -62,6 +64,8 @@ KEY (a(768))
 ) ENGINE=ROCKSDB;
 ERROR 42000: Specified key was too long; max key length is 767 bytes
 set @@global.rocksdb_large_prefix=1;
+Warnings:
+Warning	131	using rocksdb_large_prefix is deprecated and it will be removed in a future release
 CREATE TABLE t1 (
 a BLOB(4096),
 KEY (a(3072))
@@ -73,3 +77,5 @@ KEY (a(3073))
 ) ENGINE=ROCKSDB;
 ERROR 42000: Specified key was too long; max key length is 3072 bytes
 set @@global.rocksdb_large_prefix=@orig_rocksdb_large_prefix;
+Warnings:
+Warning	131	using rocksdb_large_prefix is deprecated and it will be removed in a future release

mysql-test/suite/rocksdb/r/rocksdb.result

@@ -2479,17 +2479,10 @@ id
 select * from t1 where id=9 for update;
 id
 drop table t1;
-#Index on blob column
-SET @old_mode = @@sql_mode;
-SET sql_mode = 'strict_all_tables';
-Warnings:
-Warning	3135	'NO_ZERO_DATE', 'NO_ZERO_IN_DATE' and 'ERROR_FOR_DIVISION_BY_ZERO' sql modes should be used with strict mode. They will be merged with strict mode in a future release.
+# Index on blob column
 create table t1 (a int, b text, c varchar(255), Primary Key(a), Key(c, b(255))) engine=rocksdb;
 drop table t1;
-set @orig_rocksdb_large_prefix=@@global.rocksdb_large_prefix;
-set @@global.rocksdb_large_prefix=1;
 create table t1 (a int, b text, c varchar(255), Primary Key(a), Key(b(255))) engine=rocksdb;
-set @@global.rocksdb_large_prefix=@orig_rocksdb_large_prefix;
 insert into t1 values (1, '1abcde', '1abcde'), (2, '2abcde', '2abcde'), (3, '3abcde', '3abcde');
 select * from t1;
 a	b	c
@@ -2513,9 +2506,6 @@ a	b	c
 2	12345	2abcde
 3	3abcde	3abcde
 drop table t1;
-create table t1 (a int, b text, c varchar(400), Primary Key(a), Key(b(2255))) engine=rocksdb;
-ERROR 42000: Specified key was too long; max key length is 3072 bytes
-SET sql_mode = @old_mode;
 drop table t0;
 #
 # Fix assertion failure (attempt to overrun the key buffer) for prefix indexes

mysql-test/suite/rocksdb/t/dup_key_update.test

@@ -10,15 +10,12 @@ CREATE TABLE t2 (id1 INT, id2 INT, id3 INT,
                  PRIMARY KEY (id1, id2, id3),
                  UNIQUE KEY (id3, id1) COMMENT 'cfname=rev:cf') ENGINE=ROCKSDB;
 
-
 --source suite/rocksdb/include/dup_key_update.inc
 
 # Cleanup
 DROP TABLE t1;
 DROP TABLE t2;
 
-set @orig_rocksdb_large_prefix=@@global.rocksdb_large_prefix;
-set @@global.rocksdb_large_prefix=1;
 CREATE TABLE t1 (id1 varchar(128) CHARACTER SET latin1 COLLATE latin1_bin,
                  id2 varchar(256) CHARACTER SET utf8mb3 COLLATE utf8mb3_bin,
                  id3 varchar(200) CHARACTER SET latin1 COLLATE latin1_swedish_ci,
@@ -30,7 +27,6 @@ CREATE TABLE t2 (id1 varchar(128) CHARACTER SET latin1 COLLATE latin1_bin,
                  id3 varchar(200) CHARACTER SET latin1 COLLATE latin1_swedish_ci,
                  PRIMARY KEY (id1, id2, id3),
                  UNIQUE KEY (id3, id1) COMMENT 'cfname=rev:cf') ENGINE=ROCKSDB;
-set @@global.rocksdb_large_prefix=@orig_rocksdb_large_prefix;
 
 --source suite/rocksdb/include/dup_key_update.inc
 

mysql-test/suite/rocksdb/t/rocksdb.test

@@ -1726,15 +1726,10 @@ select * from t1 where id=9 for update;
 -- disconnect con1
 drop table t1;
 
---echo #Index on blob column
-SET @old_mode = @@sql_mode;
-SET sql_mode = 'strict_all_tables';
+--echo # Index on blob column
 create table t1 (a int, b text, c varchar(255), Primary Key(a), Key(c, b(255))) engine=rocksdb;
 drop table t1;
-set @orig_rocksdb_large_prefix=@@global.rocksdb_large_prefix;
-set @@global.rocksdb_large_prefix=1;
 create table t1 (a int, b text, c varchar(255), Primary Key(a), Key(b(255))) engine=rocksdb;
-set @@global.rocksdb_large_prefix=@orig_rocksdb_large_prefix;
 insert into t1 values (1, '1abcde', '1abcde'), (2, '2abcde', '2abcde'), (3, '3abcde', '3abcde');
 select * from t1;
 --replace_column 10 #
@@ -1744,9 +1739,6 @@ explain select b, a from t1 where b like '1%';
 update t1 set b= '12345' where b = '2abcde';
 select * from t1;
 drop table t1;
---error ER_TOO_LONG_KEY
-create table t1 (a int, b text, c varchar(400), Primary Key(a), Key(b(2255))) engine=rocksdb;
-SET sql_mode = @old_mode;
 
 drop table t0;
 

mysql-test/suite/rocksdb_sys_vars/r/rocksdb_large_prefix_basic.result

@@ -12,31 +12,43 @@ SELECT @start_global_value;
 '# Setting to valid values in global scope#'
 "Trying to set variable @@global.ROCKSDB_LARGE_PREFIX to 1"
 SET @@global.ROCKSDB_LARGE_PREFIX   = 1;
+Warnings:
+Warning	131	using rocksdb_large_prefix is deprecated and it will be removed in a future release
 SELECT @@global.ROCKSDB_LARGE_PREFIX;
 @@global.ROCKSDB_LARGE_PREFIX
 1
 "Setting the global scope variable back to default"
 SET @@global.ROCKSDB_LARGE_PREFIX = DEFAULT;
+Warnings:
+Warning	131	using rocksdb_large_prefix is deprecated and it will be removed in a future release
 SELECT @@global.ROCKSDB_LARGE_PREFIX;
 @@global.ROCKSDB_LARGE_PREFIX
 1
 "Trying to set variable @@global.ROCKSDB_LARGE_PREFIX to 0"
 SET @@global.ROCKSDB_LARGE_PREFIX   = 0;
+Warnings:
+Warning	131	using rocksdb_large_prefix is deprecated and it will be removed in a future release
 SELECT @@global.ROCKSDB_LARGE_PREFIX;
 @@global.ROCKSDB_LARGE_PREFIX
 0
 "Setting the global scope variable back to default"
 SET @@global.ROCKSDB_LARGE_PREFIX = DEFAULT;
+Warnings:
+Warning	131	using rocksdb_large_prefix is deprecated and it will be removed in a future release
 SELECT @@global.ROCKSDB_LARGE_PREFIX;
 @@global.ROCKSDB_LARGE_PREFIX
 1
 "Trying to set variable @@global.ROCKSDB_LARGE_PREFIX to on"
 SET @@global.ROCKSDB_LARGE_PREFIX   = on;
+Warnings:
+Warning	131	using rocksdb_large_prefix is deprecated and it will be removed in a future release
 SELECT @@global.ROCKSDB_LARGE_PREFIX;
 @@global.ROCKSDB_LARGE_PREFIX
 1
 "Setting the global scope variable back to default"
 SET @@global.ROCKSDB_LARGE_PREFIX = DEFAULT;
+Warnings:
+Warning	131	using rocksdb_large_prefix is deprecated and it will be removed in a future release
 SELECT @@global.ROCKSDB_LARGE_PREFIX;
 @@global.ROCKSDB_LARGE_PREFIX
 1
@@ -57,6 +69,8 @@ SELECT @@global.ROCKSDB_LARGE_PREFIX;
 @@global.ROCKSDB_LARGE_PREFIX
 1
 SET @@global.ROCKSDB_LARGE_PREFIX = @start_global_value;
+Warnings:
+Warning	131	using rocksdb_large_prefix is deprecated and it will be removed in a future release
 SELECT @@global.ROCKSDB_LARGE_PREFIX;
 @@global.ROCKSDB_LARGE_PREFIX
 1

storage/rocksdb/ha_rocksdb.cc

@@ -60,6 +60,7 @@
 #include "sql/sql_thd_internal_api.h"
 #include "sql/strfunc.h"
 #include "sql/table.h"
+#include "sql/strfunc.h"
 
 /* RocksDB includes */
 #include "monitoring/histogram.h"
@@ -1188,6 +1189,50 @@ static TYPELIB index_type_typelib = {array_elements(index_type_names) - 1,
                                      "index_type_typelib", index_type_names,
                                      nullptr};
 
+static constexpr char large_prefix_deprecated_msg[] =
+    "using rocksdb_large_prefix is deprecated and it will be removed in a "
+    "future release";
+
+// Copied over from InnoDB with minor changes. Returns false on success, true on
+// failure.
+static bool check_func_bool(void *save, st_mysql_value *value) {
+  int result;
+  if (value->value_type(value) == MYSQL_VALUE_TYPE_STRING) {
+    char buff[STRING_BUFFER_USUAL_SIZE];
+    int length = sizeof(buff);
+
+    const auto *const str = value->val_str(value, buff, &length);
+
+    if (str == nullptr) return true;
+
+    result = find_type(&bool_typelib, str, length, true) - 1;
+
+    if (result < 0) return true;
+  } else {
+    long long tmp;
+    if (value->val_int(value, &tmp) < 0) return true;
+    if (tmp > 1 || tmp < 0) return true;
+    result = static_cast<int>(tmp);
+  }
+  *(bool *)save = result != 0;
+  return false;
+}
+
+static int rocksdb_large_prefix_check(THD *, SYS_VAR *, void *save,
+                                      st_mysql_value *value) {
+  if (check_func_bool(save, value)) return HA_EXIT_FAILURE;
+
+  return HA_EXIT_SUCCESS;
+}
+
+static void rocksdb_large_prefix_update(THD *thd, SYS_VAR *, void *var_ptr,
+                                        const void *save) {
+  push_warning(thd, Sql_condition::SL_WARNING, HA_ERR_WRONG_COMMAND,
+               large_prefix_deprecated_msg);
+
+  *static_cast<bool *>(var_ptr) = *static_cast<const bool *>(save);
+}
+
 // TODO: 0 means don't wait at all, and we don't support it yet?
 static MYSQL_THDVAR_ULONG(lock_wait_timeout,
                           PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_HINTUPDATEABLE,
@@ -2444,9 +2489,9 @@ static MYSQL_SYSVAR_BOOL(table_stats_use_table_scan,
 
 static MYSQL_SYSVAR_BOOL(
     large_prefix, rocksdb_large_prefix, PLUGIN_VAR_RQCMDARG,
-    "Support large index prefix length of 3072 bytes. If off, the maximum "
-    "index prefix length is 767.",
-    nullptr, nullptr, true);
+    "Deprecated: support large index prefix length of 3072 bytes. If off, the "
+    "maximum index prefix length is 767.",
+    rocksdb_large_prefix_check, rocksdb_large_prefix_update, true);
 
 static MYSQL_SYSVAR_BOOL(
     allow_to_start_after_corruption, rocksdb_allow_to_start_after_corruption,