Merge work:/home/bk/mysql-4.0 into hundin.mysql.fi:/my/bk/mysql-4.0

Docs/manual.texi:
  Auto merged

innobase/btr/btr0btr.c

@@ -21,7 +21,7 @@ Created 6/2/1994 Heikki Tuuri
 #include "lock0lock.h"
 #include "ibuf0ibuf.h"
 
-/**
+/*
 Node pointers
 -------------
 Leaf pages of a B-tree contain the index records stored in the
@@ -550,14 +550,15 @@ btr_page_get_father_for_rec(
 
 	ut_ad(mtr_memo_contains(mtr, dict_tree_get_lock(tree),
 							MTR_MEMO_X_LOCK));
-	ut_ad(user_rec != page_get_supremum_rec(page));
-	ut_ad(user_rec != page_get_infimum_rec(page));
+	ut_a(user_rec != page_get_supremum_rec(page));
+	ut_a(user_rec != page_get_infimum_rec(page));
 	
 	ut_ad(dict_tree_get_page(tree) != buf_frame_get_page_no(page));
 
 	heap = mem_heap_create(100);
 
-	tuple = dict_tree_build_node_ptr(tree, user_rec, 0, heap);
+	tuple = dict_tree_build_node_ptr(tree, user_rec, 0, heap,
+					 btr_page_get_level(page, mtr));
 
 	/* In the following, we choose just any index from the tree as the
 	first parameter for btr_cur_search_to_nth_level. */
@@ -569,7 +570,7 @@ btr_page_get_father_for_rec(
 
 	node_ptr = btr_cur_get_rec(&cursor);
 
-	ut_ad(btr_node_ptr_get_child_page_no(node_ptr) ==
+	ut_a(btr_node_ptr_get_child_page_no(node_ptr) ==
 						buf_frame_get_page_no(page));
 	mem_heap_free(heap);
 
@@ -949,8 +950,8 @@ btr_root_raise_and_insert(
 	/* Build the node pointer (= node key and page address) for the
 	child */
 
-	node_ptr = dict_tree_build_node_ptr(tree, rec, new_page_no, heap);
-	
+	node_ptr = dict_tree_build_node_ptr(tree, rec, new_page_no, heap,
+					                          level);
 	/* Reorganize the root to get free space */
 	btr_page_reorganize(root, mtr);	
 
@@ -1365,7 +1366,7 @@ btr_attach_half_pages(
 	half */
 
 	node_ptr_upper = dict_tree_build_node_ptr(tree, split_rec,
-							upper_page_no, heap);
+					     upper_page_no, heap, level);
 
 	/* Insert it next to the pointer to the lower half. Note that this
 	may generate recursion leading to a split on the higher level. */
@@ -2230,7 +2231,7 @@ btr_check_node_ptr(
 	node_ptr_tuple = dict_tree_build_node_ptr(
 				tree,
 				page_rec_get_next(page_get_infimum_rec(page)),
-				0, heap);
+				0, heap, btr_page_get_level(page, mtr));
 				
 	ut_a(cmp_dtuple_rec(node_ptr_tuple, node_ptr) == 0);
 
@@ -2485,10 +2486,11 @@ loop:
 			heap = mem_heap_create(256);
 		
 			node_ptr_tuple = dict_tree_build_node_ptr(
-						tree,
+					tree,
 					page_rec_get_next(
 						page_get_infimum_rec(page)),
-						0, heap);
+						0, heap,
+       					btr_page_get_level(page, &mtr));
 
 			if (cmp_dtuple_rec(node_ptr_tuple, node_ptr) != 0) {
 

innobase/btr/btr0cur.c

@@ -2345,9 +2345,9 @@ btr_cur_pessimistic_delete(
 			heap = mem_heap_create(256);
 
 			node_ptr = dict_tree_build_node_ptr(
-						tree, page_rec_get_next(rec),
-						buf_frame_get_page_no(page),
-						heap);
+					tree, page_rec_get_next(rec),
+					buf_frame_get_page_no(page),
+       					heap, btr_page_get_level(page, mtr));
 
 			btr_insert_on_non_leaf_level(tree,
 					btr_page_get_level(page, mtr) + 1,

innobase/buf/buf0flu.c

@@ -138,15 +138,11 @@ buf_flush_ready_for_flush(
 
 			return(TRUE);
 
-		} else if ((block->old || (UT_LIST_GET_LEN(buf_pool->LRU)
-							< BUF_LRU_OLD_MIN_LEN))
-			   && (block->buf_fix_count == 0)) {
+		} else if (block->buf_fix_count == 0) {
  
 			/* If we are flushing the LRU list, to avoid deadlocks
 			we require the block not to be bufferfixed, and hence
-			not latched. Since LRU flushed blocks are soon moved
-			to the free list, it is good to flush only old blocks
-			from the end of the LRU list. */
+			not latched. */
 
 			return(TRUE);
 		}
@@ -560,6 +556,15 @@ buf_flush_try_neighbors(
 
 		block = buf_page_hash_get(space, i);
 
+		if (block && flush_type == BUF_FLUSH_LRU && i != offset
+		    && !block->old) {
+
+		  /* We avoid flushing 'non-old' blocks in an LRU flush,
+		     because the flushed blocks are soon freed */
+
+		  continue;
+		}
+
 		if (block && buf_flush_ready_for_flush(block, flush_type)) {
 
 			mutex_exit(&(buf_pool->mutex));

innobase/dict/dict0dict.c

@@ -2415,7 +2415,9 @@ dict_tree_build_node_ptr(
 	dict_tree_t*	tree,	/* in: index tree */
 	rec_t*		rec,	/* in: record for which to build node pointer */
 	ulint		page_no,/* in: page number to put in node pointer */
-	mem_heap_t*	heap)	/* in: memory heap where pointer created */
+	mem_heap_t*	heap,	/* in: memory heap where pointer created */
+	ulint           level)  /* in: level of rec in tree: 0 means leaf
+				level */
 {
 	dtuple_t*	tuple;
 	dict_index_t*	ind;
@@ -2427,9 +2429,16 @@ dict_tree_build_node_ptr(
 	
 	if (tree->type & DICT_UNIVERSAL) {
 		/* In a universal index tree, we take the whole record as
-		the node pointer */
+		the node pointer if the reord is on the leaf level,
+		on non-leaf levels we remove the last field, which
+		contains the page number of the child page */
 
 		n_unique = rec_get_n_fields(rec);
+
+		if (level > 0) {
+		        ut_a(n_unique > 1);
+		        n_unique--;
+		}
 	} else {	
 		n_unique = dict_index_get_n_unique_in_tree(ind);
 	}

innobase/include/dict0dict.h

@@ -622,7 +622,9 @@ dict_tree_build_node_ptr(
 	dict_tree_t*	tree,	/* in: index tree */
 	rec_t*		rec,	/* in: record for which to build node pointer */
 	ulint		page_no,/* in: page number to put in node pointer */
-	mem_heap_t*	heap);	/* in: memory heap where pointer created */
+	mem_heap_t*	heap,	/* in: memory heap where pointer created */
+	ulint           level);  /* in: level of rec in tree: 0 means leaf
+				level */
 /**************************************************************************
 Copies an initial segment of a physical record, long enough to specify an
 index entry uniquely. */

mysql-test/r/create.result

@@ -68,3 +68,12 @@ select * from t2 where b="world";
 a	B
 3	world
 drop table t1,t2;
+create table t1(x varchar(50) );
+create table t2 select x from t1 where 1=2;
+describe t1;
+Field	Type	Null	Key	Default	Extra
+x	varchar(50)	YES		NULL	
+describe t2;
+Field	Type	Null	Key	Default	Extra
+x	char(50)	YES		NULL	
+drop table t1,t2;

mysql-test/r/myisam.result

@@ -31,3 +31,20 @@ check table t1;
 Table	Op	Msg_type	Msg_text
 test.t1	check	status	OK
 drop table t1;
+create table t1 (a int not null auto_increment, b int not null, primary key (a), index(b));
+insert into t1 (b) values (1),(2),(2),(2),(2);
+optimize table t1;
+Table	Op	Msg_type	Msg_text
+test.t1	optimize	status	OK
+show index from t1;
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Comment
+t1	0	PRIMARY	1	a	A	5	NULL	NULL	
+t1	1	b	1	b	A	1	NULL	NULL	
+optimize table t1;
+Table	Op	Msg_type	Msg_text
+test.t1	optimize	status	Table is already up to date
+show index from t1;
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Comment
+t1	0	PRIMARY	1	a	A	5	NULL	NULL	
+t1	1	b	1	b	A	1	NULL	NULL	
+drop table t1;

mysql-test/t/create.test

@@ -65,3 +65,13 @@ create table t2 (key (b)) select * from t1;
 explain select * from t2 where b="world";
 select * from t2 where b="world";
 drop table t1,t2;
+
+#
+# Test types after CREATE ... SELECT
+#
+
+create table t1(x varchar(50) );
+create table t2 select x from t1 where 1=2;
+describe t1;
+describe t2;
+drop table t1,t2;

mysql-test/t/myisam.test

@@ -38,3 +38,15 @@ check table t1;
 repair table t1;
 check table t1;
 drop table t1;
+
+#
+# Test bug: Two optimize in a row reset index cardinality
+#
+
+create table t1 (a int not null auto_increment, b int not null, primary key (a), index(b));
+insert into t1 (b) values (1),(2),(2),(2),(2);
+optimize table t1;
+show index from t1;
+optimize table t1;
+show index from t1;
+drop table t1;

sql/ha_myisam.cc

@@ -541,7 +541,7 @@ int ha_myisam::optimize(THD* thd, HA_CHECK_OPT *check_opt)
 int ha_myisam::repair(THD *thd, MI_CHECK &param, bool optimize)
 {
   int error=0;
-  uint extra_testflag=0;
+  uint local_testflag=param.testflag;
   bool optimize_done= !optimize, statistics_done=0;
   const char *old_proc_info=thd->proc_info;
   char fixed_name[FN_REFLEN];
@@ -570,19 +570,18 @@ int ha_myisam::repair(THD *thd, MI_CHECK &param, bool optimize)
        (!param.opt_rep_quick ||
 	!(share->state.changed & STATE_NOT_OPTIMIZED_KEYS))))
   {
-    ulonglong key_map= ((param.testflag & T_CREATE_MISSING_KEYS) ? 
+    ulonglong key_map= ((local_testflag & T_CREATE_MISSING_KEYS) ? 
 			((ulonglong) 1L << share->base.keys)-1 :
 			share->state.key_map);
+    uint testflag=param.testflag;
     if (mi_test_if_sort_rep(file,file->state->records,key_map,0) &&
-	(param.testflag & T_REP_BY_SORT))
+	(local_testflag & T_REP_BY_SORT))
     {
-      uint testflag=param.testflag;
-      extra_testflag=  T_STATISTICS;
+      local_testflag|= T_STATISTICS;
       param.testflag|= T_STATISTICS;		// We get this for free
       thd->proc_info="Repair by sorting";
       statistics_done=1;
       error = mi_repair_by_sort(&param, file, fixed_name, param.opt_rep_quick);
-      param.testflag=testflag;
     }
     else
     {
@@ -590,22 +589,28 @@ int ha_myisam::repair(THD *thd, MI_CHECK &param, bool optimize)
       param.testflag &= ~T_REP_BY_SORT;
       error=  mi_repair(&param, file, fixed_name, param.opt_rep_quick);
     }
+    param.testflag=testflag;
+    optimize_done=1;
   }
   if (!error)
   {
-    if ((param.testflag & T_SORT_INDEX) &&
+    if ((local_testflag & T_SORT_INDEX) &&
 	(share->state.changed & STATE_NOT_SORTED_PAGES))
     {
       optimize_done=1;
       thd->proc_info="Sorting index";
       error=mi_sort_index(&param,file,fixed_name);
     }
-    if (!statistics_done && (param.testflag & T_STATISTICS) &&
-	(share->state.changed & STATE_NOT_ANALYZED))
+    if (!statistics_done && (local_testflag & T_STATISTICS))
     {
-      optimize_done=1;
-      thd->proc_info="Analyzing";
-      error = chk_key(&param, file);
+      if (share->state.changed & STATE_NOT_ANALYZED)
+      {
+	optimize_done=1;
+	thd->proc_info="Analyzing";
+	error = chk_key(&param, file);
+      }
+      else
+	local_testflag&= ~T_STATISTICS;		// Don't update statistics
     }
   }
   thd->proc_info="Saving state";
@@ -620,10 +625,11 @@ int ha_myisam::repair(THD *thd, MI_CHECK &param, bool optimize)
     file->save_state=file->s->state.state;
     if (file->s->base.auto_key)
       update_auto_increment_key(&param, file, 1);
-    error = update_state_info(&param, file,
-			      UPDATE_TIME | UPDATE_OPEN_COUNT |
-			      ((param.testflag | extra_testflag) &
-			       T_STATISTICS ? UPDATE_STAT : 0));
+    if (optimize_done)
+      error = update_state_info(&param, file,
+				UPDATE_TIME | UPDATE_OPEN_COUNT |
+				(local_testflag &
+				 T_STATISTICS ? UPDATE_STAT : 0));
     info(HA_STATUS_NO_LOCK | HA_STATUS_TIME | HA_STATUS_VARIABLE |
 	 HA_STATUS_CONST);
     if (rows != file->state->records && ! (param.testflag & T_VERY_SILENT))

sql/item_func.cc

@@ -621,8 +621,8 @@ double Item_func_rand::val()
 {
   if (arg_count)
   {					// Only use argument once in query
-    ulong tmp=((ulong) args[0]->val_int())+55555555L;
-    randominit(&current_thd->rand,tmp,tmp/2);
+    ulong tmp=((ulong) args[0]->val_int());
+    randominit(&current_thd->rand,tmp*0x10001L+55555555L,tmp*0x10000001L);
 #ifdef DELETE_ITEMS
     delete args[0];
 #endif