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Fix sorting of NULL values (Should always be first)

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Fix problem with HAVING and MAX() IS NOT NULL


Docs/manual.texi:
  Changelog & NULL usage with ORDER BY
client/mysqldump.c:
  Cleanup disable keys
mysql-test/r/distinct.result:
  Fix results after ORDER BY with NULL fix
mysql-test/r/group_by.result:
  Fix results after ORDER BY with NULL fix
mysql-test/r/having.result:
  Testcase for bug with HAVING
mysql-test/t/distinct.test:
  Test for DISTINCT + ORDER BY DESC bug
mysql-test/t/having.test:
  Test of HAVING and MAX IS NOT NULL
sql/filesort.cc:
  Fix sorting of NULL values (Should always be first)
sql/item.h:
  Fix problem with HAVING and MAX() IS NOT NULL
sql/item_sum.h:
  Fix problem with HAVING and MAX() IS NOT NULL
sql/opt_range.cc:
  Fix problem with HAVING and MAX() IS NOT NULL
sql/opt_range.h:
  Fix sorting of NULL values
sql/sql_select.cc:
  Fix sorting of ORDER BY ... DESC on NULL values.
This commit is contained in:
unknown 2002-03-02 09:51:24 +02:00
commit ad4fcb8a01
13 changed files with 144 additions and 36 deletions
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3
sql/item_sum.h
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@ -64,6 +64,7 @@ public:
{ return new Item_field(field);}
table_map used_tables() const { return ~(table_map) 0; } /* Not used */
bool const_item() const { return 0; }
bool is_null() { return null_value; }
void update_used_tables() { }
void make_field(Send_field *field);
void print(String *str);
@ -202,6 +203,7 @@ public:
enum Type type() const { return FIELD_AVG_ITEM; }
double val();
longlong val_int() { return (longlong) val(); }
bool is_null() { (void) val_int(); return null_value; }
String *val_str(String*);
void make_field(Send_field *field);
void fix_length_and_dec() {}
@ -239,6 +241,7 @@ public:
double val();
longlong val_int() { return (longlong) val(); }
String *val_str(String*);
bool is_null() { (void) val_int(); return null_value; }
void make_field(Send_field *field);
void fix_length_and_dec() {}
};