cleanup: typos, comments, whitespace

mysql-test/r/type_time.result

@@ -822,7 +822,7 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	8	100.00	Using where
 Warnings:
 Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` where `test`.`t1`.`a` = TIME'10:20:30' and <cache>(length(TIME'10:20:30')) = 30 + rand()
-# Old mode, TIMESTAMP literal, zon-zero YYYYMMDD, no propagation
+# Old mode, TIMESTAMP literal, non-zero YYYYMMDD, no propagation
 SELECT * FROM t1 WHERE a=TIMESTAMP'0000-00-01 10:20:30';
 a
 34:20:30
@@ -860,7 +860,7 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	8	100.00	Using where
 Warnings:
 Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` where `test`.`t1`.`a` = TIME'10:20:30' and <cache>(length(TIME'10:20:30')) = 30 + rand()
-# Old mode, TIMESTAMP-alike literal, zon-zero YYYYMMDD, no propagation
+# Old mode, TIMESTAMP-alike literal, non-zero YYYYMMDD, no propagation
 SELECT * FROM t1 WHERE a='0000-00-01 10:20:30';
 a
 34:20:30

mysql-test/t/type_time.test

@@ -506,7 +506,7 @@ SELECT * FROM t1 WHERE a=TIMESTAMP'0000-00-00 10:20:30' AND LENGTH(a)=8;
 EXPLAIN EXTENDED
 SELECT * FROM t1 WHERE a=TIMESTAMP'0000-00-00 10:20:30' AND LENGTH(a)=30+RAND();
 
---echo # Old mode, TIMESTAMP literal, zon-zero YYYYMMDD, no propagation
+--echo # Old mode, TIMESTAMP literal, non-zero YYYYMMDD, no propagation
 SELECT * FROM t1 WHERE a=TIMESTAMP'0000-00-01 10:20:30';
 SELECT * FROM t1 WHERE a=TIMESTAMP'0000-00-01 10:20:30' AND LENGTH(a)=8;
 EXPLAIN EXTENDED
@@ -522,7 +522,7 @@ SELECT * FROM t1 WHERE a='0000-00-00 10:20:30' AND LENGTH(a)=8;
 EXPLAIN EXTENDED
 SELECT * FROM t1 WHERE a='0000-00-00 10:20:30' AND LENGTH(a)=30+RAND();
 
---echo # Old mode, TIMESTAMP-alike literal, zon-zero YYYYMMDD, no propagation
+--echo # Old mode, TIMESTAMP-alike literal, non-zero YYYYMMDD, no propagation
 SELECT * FROM t1 WHERE a='0000-00-01 10:20:30';
 SELECT * FROM t1 WHERE a='0000-00-01 10:20:30' AND LENGTH(a)=8;
 EXPLAIN EXTENDED

sql/item.h

@@ -1365,7 +1365,7 @@ class Item: public Value_source,
   /*
     Get time with automatic DATE/DATETIME to TIME conversion.
 
-    Performce a reserve operation to get_date_with_conversion().
+    Performes a reverse operation to get_date_with_conversion().
     Suppose:
     - we have a set of items (typically with the native MYSQL_TYPE_TIME type)
       whose item->get_date() return TIME1 value, and
@@ -3842,7 +3842,7 @@ class Item_date_literal_for_invalid_dates: public Item_date_literal
 
     Item_date_literal_for_invalid_dates::get_date()
     (unlike the regular Item_date_literal::get_date())
-    does not check the result for NO_ZERO_IN_DATE and NO_ZER_DATE,
+    does not check the result for NO_ZERO_IN_DATE and NO_ZERO_DATE,
     always returns success (false), and does not produce error/warning messages.
 
     We need these _for_invalid_dates classes to be able to rewrite:
@@ -5588,7 +5588,7 @@ class Item_cache: public Item_basic_constant,
   virtual void store(Item *item);
   virtual bool cache_value()= 0;
   bool basic_const_item() const
-  { return MY_TEST(example && example->basic_const_item()); }
+  { return example && example->basic_const_item(); }
   virtual void clear() { null_value= TRUE; value_cached= FALSE; }
   bool is_null() { return !has_value(); }
   virtual bool is_expensive()

sql/item_cmpfunc.cc

@@ -525,8 +525,7 @@ void Item_bool_rowready_func2::fix_length_and_dec()
 int Arg_comparator::set_compare_func(Item_func_or_sum *item, Item_result type)
 {
   owner= item;
-  func= comparator_matrix[type]
-                         [is_owner_equal_func()];
+  func= comparator_matrix[type][is_owner_equal_func()];
 
   switch (type) {
   case TIME_RESULT:
@@ -708,7 +707,7 @@ int Arg_comparator::set_cmp_func(Item_func_or_sum *owner_arg,
   @return cache item or original value.
 */
 
-Item** Arg_comparator::cache_converted_constant(THD *thd_arg, Item **value,
+Item** Arg_comparator::cache_converted_constant(THD *thd, Item **value,
                                                 Item **cache_item,
                                                 Item_result type)
 {
@@ -717,12 +716,12 @@ Item** Arg_comparator::cache_converted_constant(THD *thd_arg, Item **value,
     Also, get_datetime_value creates Item_cache internally.
     Unless fixed, we should not do it here.
   */
-  if (!thd_arg->lex->is_ps_or_view_context_analysis() &&
+  if (!thd->lex->is_ps_or_view_context_analysis() &&
       (*value)->const_item() && type != (*value)->result_type() &&
       type != TIME_RESULT)
   {
-    Item_cache *cache= Item_cache::get_cache(thd_arg, *value, type);
-    cache->setup(thd_arg, *value);
+    Item_cache *cache= Item_cache::get_cache(thd, *value, type);
+    cache->setup(thd, *value);
     *cache_item= cache;
     return cache_item;
   }
@@ -2172,7 +2171,7 @@ void Item_func_between::fix_length_and_dec()
   if (m_compare_type ==  TIME_RESULT)
     compare_as_dates= find_date_time_item(args, 3, 0);
 
-  /* See the comment about the similar block in Item_bool_func2 */
+  /* See the comment for Item_func::convert_const_compared_to_int_field */
   if (args[0]->real_item()->type() == FIELD_ITEM &&
       !thd->lex->is_ps_or_view_context_analysis())
   {
@@ -4286,7 +4285,7 @@ void Item_func_in::fix_length_and_dec()
       values on the right can be compared as integers and adjust the 
       comparison type accordingly.
 
-      See the comment about the similar block in Item_bool_func2
+      And see the comment for Item_func::convert_const_compared_to_int_field
     */  
     if (args[0]->real_item()->type() == FIELD_ITEM &&
         !thd->lex->is_view_context_analysis() && m_compare_type != INT_RESULT)

sql/item_cmpfunc.h

@@ -529,14 +529,13 @@ class Item_bool_rowready_func2 :public Item_bool_func2_with_rev
       clone->cmp.comparators= 0;
     }
     return clone;
-  }      
-
+  }
 };
 
 /**
   XOR inherits from Item_bool_func because it is not optimized yet.
   Later, when XOR is optimized, it needs to inherit from
-  Item_cond instead. See WL#5800. 
+  Item_cond instead. See WL#5800.
 */
 class Item_func_xor :public Item_bool_func
 {