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Bug #49480: WHERE using YEAR columns returns unexpected results

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Merge the fix from 5.1-bugteam to 5.1-main
This commit is contained in:
Georgi Kodinov
2009-12-15 10:37:10 +02:00
parent 8dc0091c21
commit 915cc3e9b0
4 changed files with 421 additions and 102 deletions
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9
sql/item_cmpfunc.h
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@@ -42,24 +42,22 @@ class Arg_comparator: public Sql_alloc
bool is_nulls_eq; // TRUE <=> compare for the EQUAL_FUNC
bool set_null; // TRUE <=> set owner->null_value
// when one of arguments is NULL.
bool year_as_datetime; // TRUE <=> convert YEAR value to
// the YYYY-00-00 00:00:00 DATETIME
// format. See compare_year.
enum enum_date_cmp_type { CMP_DATE_DFLT= 0, CMP_DATE_WITH_DATE,
CMP_DATE_WITH_STR, CMP_STR_WITH_DATE };
longlong (*get_value_a_func)(THD *thd, Item ***item_arg, Item **cache_arg,
Item *warn_item, bool *is_null);
longlong (*get_value_b_func)(THD *thd, Item ***item_arg, Item **cache_arg,
Item *warn_item, bool *is_null);
bool try_year_cmp_func(Item_result type);
public:
DTCollation cmp_collation;
/* Allow owner function to use string buffers. */
String value1, value2;
Arg_comparator(): thd(0), a_cache(0), b_cache(0), set_null(0),
year_as_datetime(0), get_value_a_func(0), get_value_b_func(0) {};
get_value_a_func(0), get_value_b_func(0) {};
Arg_comparator(Item **a1, Item **a2): a(a1), b(a2), thd(0),
a_cache(0), b_cache(0), set_null(0), year_as_datetime(0),
a_cache(0), b_cache(0), set_null(0),
get_value_a_func(0), get_value_b_func(0) {};
int set_compare_func(Item_result_field *owner, Item_result type);
@@ -101,7 +99,6 @@ public:
int compare_real_fixed();
int compare_e_real_fixed();
int compare_datetime(); // compare args[0] & args[1] as DATETIMEs
int compare_year();
static enum enum_date_cmp_type can_compare_as_dates(Item *a, Item *b,
ulonglong *const_val_arg);