CHECKSUM TABLE table1, table2, ... [ QUICK | EXTENDED ]

myisam/mi_checksum.c:
  workaround for zlib's crc32 glitch
mysql-test/r/show_check.result:
  results updated
mysys/checksum.c:
  switching to crc32 as a checksum algorithm

myisam/mi_checksum.c

@@ -50,7 +50,7 @@ ha_checksum mi_checksum(MI_INFO *info, const byte *buf)
       pos=buf;
       break;
     }
-    crc=my_checksum(crc, pos, length);
+    crc=my_checksum(crc, pos ? pos : "", length);
   }
   return crc;
 }

mysql-test/r/innodb.result

@@ -1341,3 +1341,28 @@ ERROR HY000: Table storage engine for 't1' doesn't have this option
 select * from t1;
 c1	c2	stamp
 drop table t1;
+create table t1 (a int, b varchar(200), c text not null) checksum=1 type=myisam;
+create table t2 (a int, b varchar(200), c text not null) checksum=0 type=innodb;
+create table t3 (a int, b varchar(200), c text not null) checksum=1 type=innodb;
+insert t1 values (1, "aaa", "bbb"), (NULL, "", "ccccc"), (0, NULL, "");
+insert t2 select * from t1;
+insert t3 select * from t1;
+checksum table t1, t2, t3, t4 quick;
+Table	Checksum
+test.t1	968604391
+test.t2	NULL
+test.t3	NULL
+test.t4	NULL
+checksum table t1, t2, t3, t4;
+Table	Checksum
+test.t1	968604391
+test.t2	968604391
+test.t3	968604391
+test.t4	NULL
+checksum table t1, t2, t3, t4 extended;
+Table	Checksum
+test.t1	968604391
+test.t2	968604391
+test.t3	968604391
+test.t4	NULL
+drop table t1,t2,t3;

mysql-test/r/myisam.result

@@ -394,6 +394,23 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 drop table t1,t2;
 CREATE TABLE t1 (`a` int(11) NOT NULL default '0', `b` int(11) NOT NULL default '0', UNIQUE KEY `a` USING RTREE (`a`,`b`)) TYPE=MyISAM;
 ERROR 42000: This version of MySQL doesn't yet support 'RTREE INDEX'
-DROP TABLE IF EXISTS t1;
-Warnings:
-Note	1051	Unknown table 't1'
+create table t1 (a int, b varchar(200), c text not null) checksum=1;
+create table t2 (a int, b varchar(200), c text not null) checksum=0;
+insert t1 values (1, "aaa", "bbb"), (NULL, "", "ccccc"), (0, NULL, "");
+insert t2 select * from t1;
+checksum table t1, t2, t3 quick;
+Table	Checksum
+test.t1	968604391
+test.t2	NULL
+test.t3	NULL
+checksum table t1, t2, t3;
+Table	Checksum
+test.t1	968604391
+test.t2	968604391
+test.t3	NULL
+checksum table t1, t2, t3 extended;
+Table	Checksum
+test.t1	968604391
+test.t2	968604391
+test.t3	NULL
+drop table t1,t2;

mysql-test/r/show_check.result

@@ -43,7 +43,7 @@ wait_timeout	28800
 show variables like "this_doesn't_exists%";
 Variable_name	Value
 show table status from test like "this_doesn't_exists%";
-Name	Type	Row_format	Rows	Avg_row_length	Data_length	Max_data_length	Index_length	Data_free	Auto_increment	Create_time	Update_time	Check_time	Charset	Create_options	Comment
+Name	Type	Row_format	Rows	Avg_row_length	Data_length	Max_data_length	Index_length	Data_free	Auto_increment	Create_time	Update_time	Check_time	Charset	Checksum	Create_options	Comment
 show databases;
 Database
 mysql

mysql-test/t/innodb.test

@@ -920,3 +920,15 @@ replace delayed into t1 (c1, c2)  values ( "text1","12"),( "text2","13"),( "text
 select * from t1;
 drop table t1;
 
+create table t1 (a int, b varchar(200), c text not null) checksum=1 type=myisam;
+create table t2 (a int, b varchar(200), c text not null) checksum=0 type=innodb;
+create table t3 (a int, b varchar(200), c text not null) checksum=1 type=innodb;
+insert t1 values (1, "aaa", "bbb"), (NULL, "", "ccccc"), (0, NULL, "");
+insert t2 select * from t1;
+insert t3 select * from t1;
+checksum table t1, t2, t3, t4 quick;
+checksum table t1, t2, t3, t4;
+checksum table t1, t2, t3, t4 extended;
+#show table status;
+drop table t1,t2,t3;
+

mysql-test/t/myisam.test

@@ -360,4 +360,15 @@ drop table t1,t2;
 CREATE TABLE t1 (`a` int(11) NOT NULL default '0', `b` int(11) NOT NULL default '0', UNIQUE KEY `a` USING RTREE (`a`,`b`)) TYPE=MyISAM;
 # INSERT INTO t1 VALUES (1,1),(1,1);
 # DELETE FROM rt WHERE a<1;
-DROP TABLE IF EXISTS t1;
+# DROP TABLE IF EXISTS t1;
+
+create table t1 (a int, b varchar(200), c text not null) checksum=1;
+create table t2 (a int, b varchar(200), c text not null) checksum=0;
+insert t1 values (1, "aaa", "bbb"), (NULL, "", "ccccc"), (0, NULL, "");
+insert t2 select * from t1;
+checksum table t1, t2, t3 quick;
+checksum table t1, t2, t3;
+checksum table t1, t2, t3 extended;
+#show table status;
+drop table t1,t2;
+

mysys/checksum.c

@@ -30,9 +30,11 @@
 
 ha_checksum my_checksum(ha_checksum crc, const byte *pos, uint length)
 {
-  const byte *end=pos+length;
+/*  const byte *end=pos+length;
   for ( ; pos != end ; pos++)
     crc=((crc << 8) + *((uchar*) pos)) + (crc >> (8*sizeof(ha_checksum)-8));
   return crc;
+*/
+  return (ha_checksum)crc32((uint)crc, (const uchar *)pos, length);
 }
 

sql/mysql_priv.h

@@ -398,7 +398,8 @@ bool check_global_access(THD *thd, ulong want_access);
 int mysql_backup_table(THD* thd, TABLE_LIST* table_list);
 int mysql_restore_table(THD* thd, TABLE_LIST* table_list);
 
-int mysql_checksum_table(THD* thd, TABLE_LIST* table_list);
+int mysql_checksum_table(THD* thd, TABLE_LIST* table_list,
+		      HA_CHECK_OPT* check_opt);
 int mysql_check_table(THD* thd, TABLE_LIST* table_list,
 		      HA_CHECK_OPT* check_opt);
 int mysql_repair_table(THD* thd, TABLE_LIST* table_list,

sql/sql_parse.cc

@@ -2269,7 +2269,7 @@ mysql_execute_command(THD *thd)
     if (check_db_used(thd,tables) ||
 	check_table_access(thd, SELECT_ACL | EXTRA_ACL , tables))
       goto error; /* purecov: inspected */
-    res = mysql_checksum_table(thd, tables);
+    res = mysql_checksum_table(thd, tables, &lex->check_opt);
     break;
   }
   case SQLCOM_REPAIR:

sql/sql_table.cc

@@ -2588,7 +2588,7 @@ copy_data_between_tables(TABLE *from,TABLE *to,
   DBUG_RETURN(error > 0 ? -1 : 0);
 }
 
-int mysql_checksum_table(THD* thd, TABLE_LIST* tables)
+int mysql_checksum_table(THD* thd, TABLE_LIST* tables, HA_CHECK_OPT *check_opt)
 {
   TABLE_LIST *table;
   List<Item> field_list;
@@ -2608,9 +2608,10 @@ int mysql_checksum_table(THD* thd, TABLE_LIST* tables)
     char table_name[NAME_LEN*2+2];
     char* db = (table->db) ? table->db : thd->db;
     bool fatal_error=0;
+    TABLE *t;
     strxmov(table_name,db ? db : "",".",table->real_name,NullS);
 
-    table->table = open_ltable(thd, table, TL_READ_NO_INSERT);
+    t=table->table = open_ltable(thd, table, TL_READ_NO_INSERT);
 #ifdef EMBEDDED_LIBRARY
     thd->net.last_errno= 0;  // these errors shouldn't get client
 #endif
@@ -2618,19 +2619,54 @@ int mysql_checksum_table(THD* thd, TABLE_LIST* tables)
     protocol->prepare_for_resend();
     protocol->store(table_name, system_charset_info);
 
-    if (!table->table)
+    if (!t)
     {
       protocol->store_null();
       thd->net.last_error[0]=0;
     }
     else
     {
-      table->table->pos_in_table_list= table;
+      t->pos_in_table_list= table;
 
-      if (table->table->file->table_flags() & HA_HAS_CHECKSUM)
-        protocol->store((ulonglong)table->table->file->checksum());
+      if (t->file->table_flags() & HA_HAS_CHECKSUM &&
+          !(check_opt->flags & T_EXTEND))
+        protocol->store((ulonglong)t->file->checksum());
+      else if (!(t->file->table_flags() & HA_HAS_CHECKSUM) &&
+          check_opt->flags & T_QUICK)
+        protocol->store_null();
       else
+      {
+        /* calculating table's checksum */
+        ha_checksum crc=0;
+        if (t->file->rnd_init(1))
           protocol->store_null();
+        else
+        {
+          while (!t->file->rnd_next(t->record[0]))
+          {
+            ha_checksum row_crc=0;
+            if (t->record[0] != t->field[0]->ptr)
+              row_crc=my_checksum(row_crc, t->record[0],
+                                  t->field[0]->ptr - t->record[0]);
+
+            for (uint i=0; i < t->fields; i++ )
+            {
+              Field *f=t->field[i];
+              if (f->type() == FIELD_TYPE_BLOB)
+              {
+                String tmp;
+                f->val_str(&tmp,&tmp);
+                row_crc=my_checksum(row_crc, tmp.ptr(), tmp.length());
+              }
+              else
+                row_crc=my_checksum(row_crc, f->ptr, f->pack_length());
+            }
+
+            crc+=row_crc;
+          }
+          protocol->store((ulonglong)crc);
+        }
+      }
 #ifdef EMBEDDED_LIBRARY
       thd->net.last_errno= 0;  // these errors shouldn't get client
 #endif

sql/sql_yacc.yy

@@ -1760,10 +1760,16 @@ checksum:
 	   LEX *lex=Lex;
 	   lex->sql_command = SQLCOM_CHECKSUM;
 	}
-	table_list
+	table_list opt_checksum_type
         {}
 	;
 
+opt_checksum_type:
+        /* nothing */  { Lex->check_opt.flags= 0; }
+	| QUICK        { Lex->check_opt.flags= T_QUICK; }
+	| EXTENDED_SYM { Lex->check_opt.flags= T_EXTEND; }
+        ;
+
 repair:
 	REPAIR opt_no_write_to_binlog table_or_tables
 	{