Fixed crashing bug with alter table when table was in use (Bug #3643)

We didn't use 'only index' for tables of type 'const'. (Bug #3497)

mysql-test/r/func_str.result

@@ -639,3 +639,14 @@ name
 aaaaaaaaaaccccc
 bbbbbbbbbbddddd
 drop table t1, t2;
+create table t1 (c1 INT);
+insert into t1 (c1) values ('21474836461');
+Warnings:
+Warning	1265	Data truncated for column 'c1' at row 1
+show warnings;
+Level	Code	Message
+Warning	1265	Data truncated for column 'c1' at row 1
+select * from t1;
+c1
+2147483647
+drop table t1;

mysql-test/r/key.result

@@ -206,3 +206,19 @@ select i from t1 where b=repeat(_utf8 'b',310);
 i
 1
 drop table t1;
+CREATE TABLE t1 (id int unsigned auto_increment, name char(50), primary key (id)) engine=myisam;
+insert into t1 (name) values ('a'), ('b'),('c'),('d'),('e'),('f'),('g');
+explain select 1 from t1 where id =2;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	const	PRIMARY	PRIMARY	4	const	1	Using index
+explain select 1 from t1 where id =2 or id=3;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	range	PRIMARY	PRIMARY	4	NULL	2	Using where; Using index
+explain select name from t1 where id =2;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	const	PRIMARY	PRIMARY	4	const	1	
+ALTER TABLE t1 DROP PRIMARY KEY, ADD INDEX (id);
+explain select 1 from t1 where id =2;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	id	id	4	const	1	Using where; Using index
+drop table t1;

mysql-test/r/key_primary.result

@@ -13,7 +13,7 @@ t1
 AB%
 describe select * from t1 where t1="ABC";
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	const	PRIMARY	PRIMARY	3	const	1	
+1	SIMPLE	t1	const	PRIMARY	PRIMARY	3	const	1	Using index
 describe select * from t1 where t1="ABCD";
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables

mysql-test/r/null_key.result

@@ -12,7 +12,7 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	ref	a,b	a	9	const,const	1	Using where; Using index
 explain select * from t1 where a=2 and b = 2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	const	a,b	a	9	const,const	1	
+1	SIMPLE	t1	const	a,b	a	9	const,const	1	Using index
 explain select * from t1 where a<=>b limit 2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	index	NULL	a	9	NULL	12	Using where; Using index

mysql-test/r/subselect.result

@@ -357,10 +357,10 @@ INSERT INTO t8 (pseudo,email) VALUES ('joce1','test1');
 INSERT INTO t8 (pseudo,email) VALUES ('2joce1','2test1');
 EXPLAIN EXTENDED SELECT pseudo,(SELECT email FROM t8 WHERE pseudo=(SELECT pseudo FROM t8 WHERE pseudo='joce')) FROM t8 WHERE pseudo=(SELECT pseudo FROM t8 WHERE pseudo='joce');
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t8	const	PRIMARY	PRIMARY	35	const	1	
-4	SUBQUERY	t8	const	PRIMARY	PRIMARY	35		1	
+1	PRIMARY	t8	const	PRIMARY	PRIMARY	35	const	1	Using index
+4	SUBQUERY	t8	const	PRIMARY	PRIMARY	35		1	Using index
 2	SUBQUERY	t8	const	PRIMARY	PRIMARY	35	const	1	
-3	SUBQUERY	t8	const	PRIMARY	PRIMARY	35		1	
+3	SUBQUERY	t8	const	PRIMARY	PRIMARY	35		1	Using index
 Warnings:
 Note	1003	select high_priority test.t8.pseudo AS `pseudo`,(select test.t8.email AS `email` from test.t8 where (test.t8.pseudo = (select test.t8.pseudo AS `pseudo` from test.t8 where (test.t8.pseudo = _latin1'joce')))) AS `(SELECT email FROM t8 WHERE pseudo=(SELECT pseudo FROM t8 WHERE pseudo='joce'))` from test.t8 where (test.t8.pseudo = (select test.t8.pseudo AS `pseudo` from test.t8 where (test.t8.pseudo = _latin1'joce')))
 SELECT pseudo FROM t8 WHERE pseudo=(SELECT pseudo,email FROM
@@ -537,7 +537,7 @@ Warnings:
 Note	1003	select high_priority max(test.t1.numreponse) AS `MAX(numreponse)` from test.t1 where (test.t1.numeropost = _latin1'1')
 EXPLAIN EXTENDED SELECT numreponse FROM t1 WHERE numeropost='1' AND numreponse=(SELECT MAX(numreponse) FROM t1 WHERE numeropost='1');
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1	const	PRIMARY,numreponse	PRIMARY	7	const,const	1	
+1	PRIMARY	t1	const	PRIMARY,numreponse	PRIMARY	7	const,const	1	Using index
 2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
 Warnings:
 Note	1003	select high_priority test.t1.numreponse AS `numreponse` from test.t1 where ((test.t1.numeropost = _latin1'1') and (test.t1.numreponse = 3))

mysql-test/t/func_str.test

@@ -358,21 +358,19 @@ select substring_index("1abcd;2abcd;3abcd;4abcd", ';', 2),substring_index("1abcd
 explain extended select md5('hello'), sha('abc'), sha1('abc'), soundex(''), 'mood' sounds like 'mud', aes_decrypt(aes_encrypt('abc','1'),'1'),concat('*',space(5),'*'), reverse('abc'), rpad('a',4,'1'), lpad('a',4,'1'),  concat_ws(',','',NULL,'a'),make_set(255,_latin2'a',_latin2'b',_latin2'c'),elt(2,1),locate("a","b",2),format(130,10),char(0),conv(130,16,10),hex(130),binary 'HE', export_set(255,_latin2'y',_latin2'n',_latin2' '),FIELD('b' COLLATE latin1_bin,'A','B'),FIND_IN_SET(_latin1'B',_latin1'a,b,c,d'),collation(conv(130,16,10)), coercibility(conv(130,16,10)),length('\n\t\r\b\0\_\%\\'),bit_length('\n\t\r\b\0\_\%\\'),bit_length('\n\t\r\b\0\_\%\\'),concat('monty',' was here ','again'),length('hello'),char(ascii('h')),ord('h'),quote(1/0),crc32("123"),replace('aaaa','a','b'),insert('txs',2,1,'hi'),left(_latin2'a',1),right(_latin2'a',1),lcase(_latin2'a'),ucase(_latin2'a'),SUBSTR('abcdefg',3,2),substring_index("1abcd;2abcd;3abcd;4abcd", ';', 2),trim(_latin2' a '),ltrim(_latin2' a '),rtrim(_latin2' a '), decode(encode(repeat("a",100000),"monty"),"monty");
 
 #
-# Bug #2182
+# lpad returns incorrect result (Bug #2182)
 #
 
 SELECT lpad(12345, 5, "#");
 
 #
-# Bug #2972
+# Problem the the CONV() function (Bug #2972)
 #
  
 SELECT conv(71, 10, 36), conv('1Z', 36, 10);
 
-
-
 #
-# Bug #3089
+# Bug in SUBSTRING when mixed with CONCAT and ORDER BY (Bug #3089)
 #
 
 create table t1 (id int(1), str varchar(10)) DEFAULT CHARSET=utf8;
@@ -382,3 +380,13 @@ insert into t2 values (1,'cccccccccc'), (2,'dddddddddd');
 select substring(concat(t1.str, t2.str), 1, 15) "name" from t1, t2 
 where t2.id=t1.id order by name;
 drop table t1, t2;
+
+#
+# Test case for conversion of long string value to integer (Bug #3472)
+#
+
+create table t1 (c1 INT);
+insert into t1 (c1) values ('21474836461');
+show warnings;
+select * from t1;
+drop table t1;

mysql-test/t/key.test

@@ -204,3 +204,15 @@ select i from t1 where a=repeat(_utf8 0xD0B1,200);
 select i from t1 where b=repeat(_utf8 'b',310);
 drop table t1;
 
+#
+# Test of key read with primary key (Bug #3497)
+#
+
+CREATE TABLE t1 (id int unsigned auto_increment, name char(50), primary key (id)) engine=myisam;
+insert into t1 (name) values ('a'), ('b'),('c'),('d'),('e'),('f'),('g');
+explain select 1 from t1 where id =2;
+explain select 1 from t1 where id =2 or id=3;
+explain select name from t1 where id =2;
+ALTER TABLE t1 DROP PRIMARY KEY, ADD INDEX (id);
+explain select 1 from t1 where id =2;
+drop table t1;

sql/item.cc

@@ -1227,15 +1227,16 @@ Field *Item::tmp_table_field_from_field_type(TABLE *table)
 void Item_field::make_field(Send_field *tmp_field)
 {
   field->make_field(tmp_field);
+  DBUG_ASSERT(tmp_field->table_name);
   if (name)
     tmp_field->col_name=name;			// Use user supplied name
 }
 
+
 /*
-** Set a field:s value from a item
+  Set a field:s value from a item
 */
 
-
 void Item_field::save_org_in_field(Field *to)
 {
   if (field->is_null())

sql/sql_base.cc

@@ -1029,14 +1029,15 @@ bool reopen_table(TABLE *table,bool locked)
   *table=tmp;
   table->file->change_table_ptr(table);
 
+  DBUG_ASSERT(table->table_name);
   for (field=table->field ; *field ; field++)
   {
-    (*field)->table=table;
+    (*field)->table= (*field)->orig_table= table;
     (*field)->table_name=table->table_name;
   }
   for (key=0 ; key < table->keys ; key++)
     for (part=0 ; part < table->key_info[key].usable_key_parts ; part++)
-      table->key_info[key].key_part[part].field->table=table;
+      table->key_info[key].key_part[part].field->table= table;
   VOID(pthread_cond_broadcast(&COND_refresh));
   error=0;
 

sql/sql_load.cc

@@ -529,8 +529,8 @@ read_sep_field(THD *thd,COPY_INFO &info,TABLE *table,
 	  if (field->type() == FIELD_TYPE_TIMESTAMP)
 	    ((Field_timestamp*) field)->set_time();
 	  else if (field != table->next_number_field)      
-      field->set_warning((uint)MYSQL_ERROR::WARN_LEVEL_WARN, 
-                         ER_WARN_NULL_TO_NOTNULL);
+	    field->set_warning((uint) MYSQL_ERROR::WARN_LEVEL_WARN, 
+			       ER_WARN_NULL_TO_NOTNULL);
 	}
 	continue;
       }
@@ -1014,7 +1014,7 @@ bool READ_INFO::find_start_of_fields()
     {						// Can't be line_start
       PUSH(chr);
       while (--ptr != line_start_ptr)
-      {					// Restart with next char
+      {						// Restart with next char
 	PUSH((uchar) *ptr);
       }
       goto try_again;

sql/sql_select.cc

@@ -3630,6 +3630,12 @@ make_join_readinfo(JOIN *join, uint options)
       table->status=STATUS_NO_RECORD;
       tab->read_first_record= join_read_const;
       tab->read_record.read_record= join_no_more_records;
+      if (table->used_keys.is_set(tab->index) &&
+          !table->no_keyread)
+      {
+        table->key_read=1;
+        table->file->extra(HA_EXTRA_KEYREAD);
+      }
       break;
     case JT_EQ_REF:
       table->status=STATUS_NO_RECORD;
@@ -5951,6 +5957,12 @@ join_read_const_table(JOIN_TAB *tab, POSITION *pos)
   }
   else
   {
+    if (!table->key_read && table->used_keys.is_set(tab->index) &&
+	!table->no_keyread)
+    {
+      table->key_read=1;
+      table->file->extra(HA_EXTRA_KEYREAD);
+    }
     if ((error=join_read_const(tab)))
     {
       tab->info="unique row not found";
@@ -9216,7 +9228,8 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
 				       join->best_positions[i]. records_read,
 				       21));
       my_bool key_read=table->key_read;
-      if (tab->type == JT_NEXT && table->used_keys.is_set(tab->index))
+      if ((tab->type == JT_NEXT || tab->type == JT_CONST) &&
+          table->used_keys.is_set(tab->index))
 	key_read=1;
 
       if (tab->info)