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WL#926 "SUM(DISTINCT) and AVG(DISTINCT)": improvement of SUM(DISTINCT) and

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implementation of AVG(DISTINCT) which utilizes the approach with Fields.
The patch implemented in October is portede to the up-to-date tree 
containing DECIMAL type.
Tests for AVG(DISTINCT) (although there is not much to test provided
that SUM(DISTINCT) works), cleanups for COUNT(DISTINCT) and GROUP_CONCAT()
will follow in another changeset.
This commit is contained in:
konstantin@mysql.com
2005-03-13 23:50:43 +03:00
parent ca336ad1de
commit 983c75f05e
9 changed files with 635 additions and 192 deletions
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18
sql/field.cc
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@@ -7150,6 +7150,24 @@ void create_field::create_length_to_internal_length(void)
}
void create_field::init_for_tmp_table(enum_field_types sql_type_arg,
uint32 length_arg, uint32 decimals,
bool maybe_null, bool is_unsigned)
{
field_name= "";
sql_type= sql_type_arg;
length= length_arg;;
unireg_check= Field::NONE;
interval= 0;
charset= &my_charset_bin;
geom_type= Field::GEOM_GEOMETRY;
pack_flag= (FIELDFLAG_NUMBER |
((decimals & FIELDFLAG_MAX_DEC) << FIELDFLAG_DEC_SHIFT) |
(maybe_null ? FIELDFLAG_MAYBE_NULL : 0) |
(is_unsigned ? 0 : FIELDFLAG_DECIMAL));
}
enum_field_types get_blob_type_from_length(ulong length)
{
enum_field_types type;