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Removing "DTCollation Arg_comparator::cmp_collation".

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Using a CHARSET_INFO pointer instead.
This commit is contained in:
Alexander Barkov
2015-09-21 16:18:20 +04:00
parent 2dc32c02ab
commit c8db0df2da
3 changed files with 25 additions and 17 deletions
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25
sql/item_cmpfunc.cc
View File

@ -494,10 +494,13 @@ bool Item_func::setup_args_and_comparator(THD *thd, Arg_comparator *cmp)
DBUG_ASSERT(arg_count >= 2); // Item_func_nullif has arg_count == 3
if (args[0]->cmp_type() == STRING_RESULT &&
args[1]->cmp_type() == STRING_RESULT &&
agg_arg_charsets_for_comparison(cmp->cmp_collation, args, 2))
args[1]->cmp_type() == STRING_RESULT)
{
DTCollation tmp;
if (agg_arg_charsets_for_comparison(tmp, args, 2))
return true;
cmp->m_compare_collation= tmp.collation;
}
// Convert constants when compared to int/year field
DBUG_ASSERT(functype() != LIKE_FUNC);
convert_const_compared_to_int_field(thd);
@ -528,7 +531,7 @@ int Arg_comparator::set_compare_func(Item_func_or_sum *item, Item_result type)
switch (type) {
case TIME_RESULT:
cmp_collation.collation= &my_charset_numeric;
m_compare_collation= &my_charset_numeric;
break;
case ROW_RESULT:
{
@ -666,17 +669,19 @@ bool get_mysql_time_from_str(THD *thd, String *str, timestamp_type warn_type,
*/
bool Arg_comparator::agg_arg_charsets_for_comparison()
{
if (cmp_collation.set((*a)->collation, (*b)->collation, MY_COLL_CMP_CONV) ||
cmp_collation.derivation == DERIVATION_NONE)
DTCollation tmp;
if (tmp.set((*a)->collation, (*b)->collation, MY_COLL_CMP_CONV) ||
tmp.derivation == DERIVATION_NONE)
{
my_coll_agg_error((*a)->collation, (*b)->collation, owner->func_name());
return true;
}
if (agg_item_set_converter(cmp_collation, owner->func_name(),
if (agg_item_set_converter(tmp, owner->func_name(),
a, 1, MY_COLL_CMP_CONV, 1) ||
agg_item_set_converter(cmp_collation, owner->func_name(),
agg_item_set_converter(tmp, owner->func_name(),
b, 1, MY_COLL_CMP_CONV, 1))
return true;
m_compare_collation= tmp.collation;
return false;
}
@ -909,7 +914,7 @@ int Arg_comparator::compare_string()
{
if (set_null)
owner->null_value= 0;
return sortcmp(res1,res2,cmp_collation.collation);
return sortcmp(res1, res2, compare_collation());
}
}
if (set_null)
@ -930,7 +935,7 @@ int Arg_comparator::compare_e_string()
res2= (*b)->val_str(&value2);
if (!res1 || !res2)
return MY_TEST(res1 == res2);
return MY_TEST(sortcmp(res1, res2, cmp_collation.collation) == 0);
return MY_TEST(sortcmp(res1, res2, compare_collation()) == 0);
}

15
sql/item_cmpfunc.h
View File

@ -48,6 +48,7 @@ class Arg_comparator: public Sql_alloc
{
Item **a, **b;
Item_result m_compare_type;
CHARSET_INFO *m_compare_collation;
arg_cmp_func func;
Item_func_or_sum *owner;
bool set_null; // TRUE <=> set owner->null_value
@ -65,16 +66,18 @@ class Arg_comparator: public Sql_alloc
int compare_e_temporal(enum_field_types type);
public:
DTCollation cmp_collation;
/* Allow owner function to use string buffers. */
String value1, value2;
Arg_comparator(): m_compare_type(STRING_RESULT),
m_compare_collation(&my_charset_bin),
set_null(TRUE), comparators(0), thd(0),
a_cache(0), b_cache(0) {};
Arg_comparator(Item **a1, Item **a2): a(a1), b(a2),
m_compare_type(STRING_RESULT), set_null(TRUE),
comparators(0), thd(0), a_cache(0), b_cache(0) {};
m_compare_type(STRING_RESULT),
m_compare_collation(&my_charset_bin),
set_null(TRUE), comparators(0), thd(0),
a_cache(0), b_cache(0) {};
public:
inline int set_cmp_func(Item_func_or_sum *owner_arg,
@ -115,6 +118,7 @@ public:
((Item_func*)owner)->functype() == Item_func::EQUAL_FUNC);
}
Item_result compare_type() const { return m_compare_type; }
CHARSET_INFO *compare_collation() const { return m_compare_collation; }
Arg_comparator *subcomparators() const { return comparators; }
void cleanup()
{
@ -401,8 +405,7 @@ public:
{
return cmp.set_cmp_func(this, tmp_arg, tmp_arg + 1, true);
}
CHARSET_INFO *compare_collation() const
{ return cmp.cmp_collation.collation; }
CHARSET_INFO *compare_collation() const { return cmp.compare_collation(); }
Item_result compare_type() const { return cmp.compare_type(); }
Arg_comparator *get_comparator() { return &cmp; }
void cleanup()
@ -931,7 +934,7 @@ public:
bool is_null();
Item* propagate_equal_fields(THD *thd, const Context &ctx, COND_EQUAL *cond)
{
Context cmpctx(ANY_SUBST, cmp.compare_type(), cmp.cmp_collation.collation);
Context cmpctx(ANY_SUBST, cmp.compare_type(), cmp.compare_collation());
args[0]->propagate_equal_fields_and_change_item_tree(thd, cmpctx,
cond, &args[0]);
args[1]->propagate_equal_fields_and_change_item_tree(thd, cmpctx,

2
sql/sql_select.cc
View File

@ -12766,7 +12766,7 @@ static bool check_row_equality(THD *thd, const Arg_comparator *comparators,
is_converted= check_simple_equality(thd,
Item::Context(Item::ANY_SUBST,
tmp->compare_type(),
tmp->cmp_collation.collation),
tmp->compare_collation()),
left_item, right_item,
cond_equal);
}