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postreview fixes (BUG#5618 & BUG#5590)

Browse Source 
sql/field.cc:
  fixed compatibility fields type detection
sql/item.cc:
  fixed compatibility fields detection with using standard method for all fields, also some bugs are fixed
sql/sql_derived.cc:
  some cleanup
This commit is contained in:
unknown
2004-09-25 15:07:50 +03:00
parent 580f12cc04
commit 4038218b18
3 changed files with 54 additions and 46 deletions
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63
sql/field.cc
View File

@ -172,42 +172,51 @@ static bool test_if_real(const char *str,int length, CHARSET_INFO *cs)
FIELD_CAST_STOP
*/
static Field::field_cast_enum field_cast_decimal[]=
{Field::FIELD_CAST_STRING, Field::FIELD_CAST_VARSTRING,
{Field::FIELD_CAST_DECIMAL,
Field::FIELD_CAST_STRING, Field::FIELD_CAST_VARSTRING,
Field::FIELD_CAST_BLOB, Field::FIELD_CAST_STOP};
static Field::field_cast_enum field_cast_tiny[]=
{Field::FIELD_CAST_SHORT, Field::FIELD_CAST_MEDIUM, Field::FIELD_CAST_LONG,
{Field::FIELD_CAST_TINY,
Field::FIELD_CAST_SHORT, Field::FIELD_CAST_MEDIUM, Field::FIELD_CAST_LONG,
Field::FIELD_CAST_LONGLONG,
Field::FIELD_CAST_FLOAT, Field::FIELD_CAST_DOUBLE,
Field::FIELD_CAST_STRING, Field::FIELD_CAST_VARSTRING,
Field::FIELD_CAST_BLOB, Field::FIELD_CAST_STOP};
static Field::field_cast_enum field_cast_short[]=
{Field::FIELD_CAST_MEDIUM, Field::FIELD_CAST_LONG, Field::FIELD_CAST_LONGLONG,
{Field::FIELD_CAST_SHORT,
Field::FIELD_CAST_MEDIUM, Field::FIELD_CAST_LONG, Field::FIELD_CAST_LONGLONG,
Field::FIELD_CAST_FLOAT, Field::FIELD_CAST_DOUBLE,
Field::FIELD_CAST_STRING, Field::FIELD_CAST_VARSTRING,
Field::FIELD_CAST_BLOB, Field::FIELD_CAST_STOP};
static Field::field_cast_enum field_cast_medium[]=
{Field::FIELD_CAST_LONG, Field::FIELD_CAST_LONGLONG,
{Field::FIELD_CAST_MEDIUM,
Field::FIELD_CAST_LONG, Field::FIELD_CAST_LONGLONG,
Field::FIELD_CAST_DOUBLE,
Field::FIELD_CAST_STRING, Field::FIELD_CAST_VARSTRING,
Field::FIELD_CAST_BLOB, Field::FIELD_CAST_STOP};
static Field::field_cast_enum field_cast_long[]=
{Field::FIELD_CAST_LONGLONG,
{Field::FIELD_CAST_LONG,
Field::FIELD_CAST_LONGLONG,
Field::FIELD_CAST_DOUBLE,
Field::FIELD_CAST_STRING, Field::FIELD_CAST_VARSTRING,
Field::FIELD_CAST_BLOB, Field::FIELD_CAST_STOP};
static Field::field_cast_enum field_cast_longlong[]=
{Field::FIELD_CAST_DOUBLE,
{Field::FIELD_CAST_LONGLONG,
Field::FIELD_CAST_DOUBLE,
Field::FIELD_CAST_STRING, Field::FIELD_CAST_VARSTRING,
Field::FIELD_CAST_BLOB, Field::FIELD_CAST_STOP};
static Field::field_cast_enum field_cast_float[]=
{Field::FIELD_CAST_DOUBLE,
{Field::FIELD_CAST_FLOAT,
Field::FIELD_CAST_DOUBLE,
Field::FIELD_CAST_STRING, Field::FIELD_CAST_VARSTRING,
Field::FIELD_CAST_BLOB, Field::FIELD_CAST_STOP};
static Field::field_cast_enum field_cast_double[]=
{Field::FIELD_CAST_STRING, Field::FIELD_CAST_VARSTRING,
{Field::FIELD_CAST_DOUBLE,
Field::FIELD_CAST_STRING, Field::FIELD_CAST_VARSTRING,
Field::FIELD_CAST_BLOB, Field::FIELD_CAST_STOP};
static Field::field_cast_enum field_cast_null[]=
{Field::FIELD_CAST_DECIMAL, Field::FIELD_CAST_TINY, Field::FIELD_CAST_SHORT,
{Field::FIELD_CAST_NULL,
Field::FIELD_CAST_DECIMAL, Field::FIELD_CAST_TINY, Field::FIELD_CAST_SHORT,
Field::FIELD_CAST_MEDIUM, Field::FIELD_CAST_LONG, Field::FIELD_CAST_LONGLONG,
Field::FIELD_CAST_FLOAT, Field::FIELD_CAST_DOUBLE,
Field::FIELD_CAST_TIMESTAMP, Field::FIELD_CAST_YEAR,
@ -218,44 +227,54 @@ static Field::field_cast_enum field_cast_null[]=
Field::FIELD_CAST_GEOM, Field::FIELD_CAST_ENUM, Field::FIELD_CAST_SET,
Field::FIELD_CAST_STOP};
static Field::field_cast_enum field_cast_timestamp[]=
{Field::FIELD_CAST_DATETIME,
{Field::FIELD_CAST_TIMESTAMP,
Field::FIELD_CAST_DATETIME,
Field::FIELD_CAST_STRING, Field::FIELD_CAST_VARSTRING,
Field::FIELD_CAST_BLOB, Field::FIELD_CAST_STOP};
static Field::field_cast_enum field_cast_year[]=
{Field::FIELD_CAST_SHORT, Field::FIELD_CAST_MEDIUM, Field::FIELD_CAST_LONG,
{Field::FIELD_CAST_YEAR,
Field::FIELD_CAST_SHORT, Field::FIELD_CAST_MEDIUM, Field::FIELD_CAST_LONG,
Field::FIELD_CAST_LONGLONG,
Field::FIELD_CAST_FLOAT, Field::FIELD_CAST_DOUBLE,
Field::FIELD_CAST_STRING, Field::FIELD_CAST_VARSTRING,
Field::FIELD_CAST_BLOB, Field::FIELD_CAST_STOP};
static Field::field_cast_enum field_cast_date[]=
{Field::FIELD_CAST_DATETIME,
{Field::FIELD_CAST_DATE,
Field::FIELD_CAST_DATETIME,
Field::FIELD_CAST_STRING, Field::FIELD_CAST_VARSTRING,
Field::FIELD_CAST_BLOB, Field::FIELD_CAST_STOP};
static Field::field_cast_enum field_cast_newdate[]=
{Field::FIELD_CAST_DATETIME,
{Field::FIELD_CAST_NEWDATE,
Field::FIELD_CAST_DATETIME,
Field::FIELD_CAST_STRING, Field::FIELD_CAST_VARSTRING,
Field::FIELD_CAST_BLOB, Field::FIELD_CAST_STOP};
static Field::field_cast_enum field_cast_time[]=
{Field::FIELD_CAST_DATETIME,
{Field::FIELD_CAST_TIME,
Field::FIELD_CAST_DATETIME,
Field::FIELD_CAST_STRING, Field::FIELD_CAST_VARSTRING,
Field::FIELD_CAST_BLOB, Field::FIELD_CAST_STOP};
static Field::field_cast_enum field_cast_datetime[]=
{Field::FIELD_CAST_STRING, Field::FIELD_CAST_VARSTRING,
{Field::FIELD_CAST_DATETIME,
Field::FIELD_CAST_STRING, Field::FIELD_CAST_VARSTRING,
Field::FIELD_CAST_BLOB, Field::FIELD_CAST_STOP};
static Field::field_cast_enum field_cast_string[]=
{Field::FIELD_CAST_VARSTRING, Field::FIELD_CAST_BLOB, Field::FIELD_CAST_STOP};
{Field::FIELD_CAST_STRING,
Field::FIELD_CAST_VARSTRING, Field::FIELD_CAST_BLOB, Field::FIELD_CAST_STOP};
static Field::field_cast_enum field_cast_varstring[]=
{Field::FIELD_CAST_BLOB, Field::FIELD_CAST_STOP};
{Field::FIELD_CAST_VARSTRING,
Field::FIELD_CAST_BLOB, Field::FIELD_CAST_STOP};
static Field::field_cast_enum field_cast_blob[]=
{Field::FIELD_CAST_STOP};
{Field::FIELD_CAST_BLOB,
Field::FIELD_CAST_STOP};
/*
Geometrical, enum and set fields can be casted only to expressions
*/
static Field::field_cast_enum field_cast_geom[]=
{Field::FIELD_CAST_STOP};
static Field::field_cast_enum field_cast_enum[]=
{Field::FIELD_CAST_STRING, Field::FIELD_CAST_VARSTRING,
Field::FIELD_CAST_BLOB, Field::FIELD_CAST_STOP};
{Field::FIELD_CAST_STOP};
static Field::field_cast_enum field_cast_set[]=
{Field::FIELD_CAST_STRING, Field::FIELD_CAST_VARSTRING,
Field::FIELD_CAST_BLOB, Field::FIELD_CAST_STOP};
{Field::FIELD_CAST_STOP};
// Array of pointers on conversion table for all fields types casting
static Field::field_cast_enum *field_cast_array[]=
{0, //FIELD_CAST_STOP

35
sql/item.cc
View File

@ -2517,38 +2517,29 @@ bool Item_type_holder::join_types(THD *thd, Item *item)
if (field_example && item->type() == Item::FIELD_ITEM)
{
Field *field= ((Item_field *)item)->field;
Field::field_cast_enum field_type= field->field_cast_type();
if (field_type != Field::FIELD_CAST_ENUM &&
field_type != Field::FIELD_CAST_SET)
/* Can old example field store new data? */
if ((change_field=
!field->field_cast_compatible(field_example->field_cast_type())))
{
if (field_example->field_cast_type() != field_type)
{
if (!(change_field=
field_example->field_cast_compatible(field->field_cast_type())))
{
/*
if old field can't store value of 'worse' new field we will make
decision about result field type based only on Item result type
*/
if (!field->field_cast_compatible(field_example->field_cast_type()))
skip_store_field= 1;
}
}
/*
if old field can't store value of 'worse' new field we will make
decision about result field type based only on Item result type
*/
if (!field_example->field_cast_compatible(field->field_cast_type()))
skip_store_field= 1;
}
else
skip_store_field= 1;
}
else if (field_example || item->type() == Item::FIELD_ITEM)
{
/* expression can't be mixed with field */
skip_store_field= 1;
}
// size/type should be changed
if (change_field ||
skip_store_field ||
(new_type != item_type) ||
(max_length < new_length) ||
((new_type == INT_RESULT) &&
(decimals < item->decimals)) ||
(!maybe_null && item->maybe_null) ||
(item_type == STRING_RESULT && new_type == STRING_RESULT &&
!my_charset_same(collation.collation, item->collation.collation)))
@ -2556,8 +2547,6 @@ bool Item_type_holder::join_types(THD *thd, Item *item)
// new field has some parameters worse then current
skip_store_field|= (change_field &&
(max_length > new_length) ||
((new_type == INT_RESULT) &&
(decimals > item->decimals)) ||
(maybe_null && !item->maybe_null) ||
(item_type == STRING_RESULT &&
new_type == STRING_RESULT &&

2
sql/sql_derived.cc
View File

@ -226,7 +226,7 @@ static int mysql_derived(THD *thd, LEX *lex, SELECT_LEX_UNIT *unit,
else
{
free_tmp_table(thd, table);
thd->lex->unit.cleanup();
unit->cleanup();
}
exit: