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Bug #27300:

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Geometry fields have a result type string and a 
  special subclass to cater for the differences
  between them and the base class (just like 
  DATE/TIME).
  When creating temporary tables for results of 
  functions that return results of type GEOMETRY
  we must construct fields of the derived class 
  instead of the base class.
  Fixed by creating a GEOMETRY field (Field_geom) 
  instead of a generic BLOB (Field_blob) in temp 
  tables for the results of GIS functions that 
  have GEOMETRY return type (Item_geometry_func).
This commit is contained in:
gkodinov/kgeorge@magare.gmz
2007-03-28 14:35:23 +03:00
parent 9c55cd3e03
commit c3eb3f7093
4 changed files with 29 additions and 4 deletions
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6
sql/sql_select.cc
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@ -8793,12 +8793,12 @@ static Field *create_tmp_field_from_item(THD *thd, Item *item, TABLE *table,
enum enum_field_types type;
/*
DATE/TIME fields have STRING_RESULT result type. To preserve
type they needed to be handled separately.
DATE/TIME and GEOMETRY fields have STRING_RESULT result type.
To preserve type they needed to be handled separately.
*/
if ((type= item->field_type()) == MYSQL_TYPE_DATETIME ||
type == MYSQL_TYPE_TIME || type == MYSQL_TYPE_DATE ||
type == MYSQL_TYPE_TIMESTAMP)
type == MYSQL_TYPE_TIMESTAMP || type == MYSQL_TYPE_GEOMETRY)
new_field= item->tmp_table_field_from_field_type(table);
/*
Make sure that the blob fits into a Field_varstring which has