Fix for BUG#57316 "It is not clear how to disable autocommit"

add boolean command-line option --autocommit.

mysql-test/mysql-test-run.pl:
  do in --gdb like in --ddd: to let the developer debug the startup
  phase (like command-line options parsing), don't "run".
  It's the third time I do this change, it was previously lost
  by merges, port of 6.0 to next-mr...
mysql-test/r/mysqld--help-notwin.result:
  new command-line option
mysql-test/r/mysqld--help-win.result:
  a Linux user's best guess at what the Windows result should be
mysql-test/suite/sys_vars/inc/autocommit_func2.inc:
  new test
mysql-test/suite/sys_vars/t/autocommit_func2-master.opt:
  test new option
mysql-test/suite/sys_vars/t/autocommit_func3-master.opt:
  test new option
sql/mysqld.cc:
  new --autocommit
sql/mysqld.h:
  new --autocommit
sql/sql_partition.cc:
  What matters to this partitioning quote is to have
  the OPTION_QUOTE_SHOW_CREATE flag down, it's all
  that append_identifier() uses. So we make it explicit.

mysql-test/mysql-test-run.pl

@@ -5317,8 +5317,7 @@ sub gdb_arguments {
 	       "break mysql_parse\n" .
 	       "commands 1\n" .
 	       "disable 1\n" .
-	       "end\n" .
-	       "run");
+	       "end\n");
   }
 
   if ( $opt_manual_gdb )

mysql-test/r/mysqld--help-notwin.result

@@ -19,6 +19,7 @@ The following options may be given as the first argument:
  --auto-increment-offset[=#] 
  Offset added to Auto-increment columns. Used when
  auto-increment-increment != 1
+ --autocommit        Set default value for autocommit (0 or 1)
  --automatic-sp-privileges 
  Creating and dropping stored procedures alters ACLs
  (Defaults to on; use --skip-automatic-sp-privileges to disable.)

mysql-test/r/mysqld--help-win.result

@@ -19,6 +19,7 @@ The following options may be given as the first argument:
  --auto-increment-offset[=#] 
  Offset added to Auto-increment columns. Used when
  auto-increment-increment != 1
+ --autocommit        Set default value for autocommit (0 or 1)
  --automatic-sp-privileges 
  Creating and dropping stored procedures alters ACLs
  (Defaults to on; use --skip-automatic-sp-privileges to disable.)

mysql-test/suite/sys_vars/inc/autocommit_func2.inc

+--source include/have_innodb.inc
+
+CREATE TABLE t1
+(
+id INT NOT NULL auto_increment,
+PRIMARY KEY (id),
+name varchar(30)
+) ENGINE = INNODB;
+
+SELECT @@global.autocommit;
+SELECT @@autocommit;
+INSERT into t1(name) values('Record_1');
+INSERT into t1(name) values('Record_2');
+SELECT * from t1;
+ROLLBACK;
+SELECT * from t1;
+
+set @@global.autocommit = 1-@@global.autocommit;
+set @@autocommit = 1-@@autocommit;
+SELECT @@global.autocommit;
+SELECT @@autocommit;
+INSERT into t1(name) values('Record_1');
+INSERT into t1(name) values('Record_2');
+SELECT * from t1;
+ROLLBACK;
+SELECT * from t1;
+
+DROP TABLE t1;
+set @@global.autocommit = 1-@@global.autocommit;

mysql-test/suite/sys_vars/r/autocommit_func2.result

+CREATE TABLE t1
+(
+id INT NOT NULL auto_increment,
+PRIMARY KEY (id),
+name varchar(30)
+) ENGINE = INNODB;
+SELECT @@global.autocommit;
+@@global.autocommit
+1
+SELECT @@autocommit;
+@@autocommit
+1
+INSERT into t1(name) values('Record_1');
+INSERT into t1(name) values('Record_2');
+SELECT * from t1;
+id	name
+1	Record_1
+2	Record_2
+ROLLBACK;
+SELECT * from t1;
+id	name
+1	Record_1
+2	Record_2
+set @@global.autocommit = 1-@@global.autocommit;
+set @@autocommit = 1-@@autocommit;
+SELECT @@global.autocommit;
+@@global.autocommit
+0
+SELECT @@autocommit;
+@@autocommit
+0
+INSERT into t1(name) values('Record_1');
+INSERT into t1(name) values('Record_2');
+SELECT * from t1;
+id	name
+1	Record_1
+2	Record_2
+3	Record_1
+4	Record_2
+ROLLBACK;
+SELECT * from t1;
+id	name
+1	Record_1
+2	Record_2
+DROP TABLE t1;
+set @@global.autocommit = 1-@@global.autocommit;

mysql-test/suite/sys_vars/r/autocommit_func3.result

+CREATE TABLE t1
+(
+id INT NOT NULL auto_increment,
+PRIMARY KEY (id),
+name varchar(30)
+) ENGINE = INNODB;
+SELECT @@global.autocommit;
+@@global.autocommit
+0
+SELECT @@autocommit;
+@@autocommit
+0
+INSERT into t1(name) values('Record_1');
+INSERT into t1(name) values('Record_2');
+SELECT * from t1;
+id	name
+1	Record_1
+2	Record_2
+ROLLBACK;
+SELECT * from t1;
+id	name
+set @@global.autocommit = 1-@@global.autocommit;
+set @@autocommit = 1-@@autocommit;
+SELECT @@global.autocommit;
+@@global.autocommit
+1
+SELECT @@autocommit;
+@@autocommit
+1
+INSERT into t1(name) values('Record_1');
+INSERT into t1(name) values('Record_2');
+SELECT * from t1;
+id	name
+3	Record_1
+4	Record_2
+ROLLBACK;
+SELECT * from t1;
+id	name
+3	Record_1
+4	Record_2
+DROP TABLE t1;
+set @@global.autocommit = 1-@@global.autocommit;

mysql-test/suite/sys_vars/t/autocommit_func2-master.opt

+--autocommit=1

mysql-test/suite/sys_vars/t/autocommit_func2.test

+--source suite/sys_vars/inc/autocommit_func2.inc

mysql-test/suite/sys_vars/t/autocommit_func3-master.opt

+--autocommit=0

mysql-test/suite/sys_vars/t/autocommit_func3.test

+--source suite/sys_vars/inc/autocommit_func2.inc

sql/mysqld.cc

@@ -5662,6 +5662,12 @@ struct my_option my_long_options[]=
   {"ansi", 'a', "Use ANSI SQL syntax instead of MySQL syntax. This mode "
    "will also set transaction isolation level 'serializable'.", 0, 0, 0,
    GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
+  /*
+    Because Sys_var_bit does not support command-line options, we need to
+    explicitely add one for --autocommit
+  */
+  {"autocommit", OPT_AUTOCOMMIT, "Set default value for autocommit (0 or 1)",
+   NULL, NULL, 0, GET_BOOL, OPT_ARG, 0, 0, 0, 0, 0, NULL},
   {"bind-address", OPT_BIND_ADDRESS, "IP address to bind to.",
    &my_bind_addr_str, &my_bind_addr_str, 0, GET_STR,
    REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
@@ -7114,6 +7120,13 @@ mysqld_get_one_option(int optid,
     if (argument == NULL) /* no argument */
       log_error_file_ptr= const_cast<char*>("");
     break;
+  case OPT_AUTOCOMMIT:
+    const ulonglong turn_bit_on= (argument && (atoi(argument) == 0)) ?
+      OPTION_NOT_AUTOCOMMIT : OPTION_AUTOCOMMIT;
+    global_system_variables.option_bits=
+      (global_system_variables.option_bits &
+       ~(OPTION_NOT_AUTOCOMMIT | OPTION_AUTOCOMMIT)) | turn_bit_on;
+    break;
   }
   return 0;
 }

sql/mysqld.h

@@ -391,7 +391,8 @@ enum options_mysqld
   OPT_UPDATE_LOG,
   OPT_WANT_CORE,
   OPT_ENGINE_CONDITION_PUSHDOWN,
-  OPT_LOG_ERROR
+  OPT_LOG_ERROR,
+  OPT_AUTOCOMMIT
 };
 
 

sql/sql_partition.cc

@@ -1997,7 +1997,7 @@ static int add_part_field_list(File fptr, List<char> field_list)
     String field_string("", 0, system_charset_info);
     THD *thd= current_thd;
     ulonglong save_options= thd->variables.option_bits;
-    thd->variables.option_bits= 0;
+    thd->variables.option_bits&= ~OPTION_QUOTE_SHOW_CREATE;
     append_identifier(thd, &field_string, field_str,
                       strlen(field_str));
     thd->variables.option_bits= save_options;
@@ -2016,8 +2016,7 @@ static int add_name_string(File fptr, const char *name)
   String name_string("", 0, system_charset_info);
   THD *thd= current_thd;
   ulonglong save_options= thd->variables.option_bits;
-
-  thd->variables.option_bits= 0;
+  thd->variables.option_bits&= ~OPTION_QUOTE_SHOW_CREATE;
   append_identifier(thd, &name_string, name,
                     strlen(name));
   thd->variables.option_bits= save_options;