Fix for bug #12267 (primary key over GEOMETRY field)

mysql-test/r/gis.result:
  test result fixed
mysql-test/t/gis.test:
  test case added
sql/sql_table.cc:
  we should check this for GEOMETRY fields

mysql-test/r/gis.result

@@ -680,3 +680,8 @@ select astext(fn3());
 astext(fn3())
 POINT(1 1)
 drop function fn3;
+create table t1(pt POINT);
+alter table t1 add primary key pti(pt);
+ERROR 42000: BLOB/TEXT column 'pt' used in key specification without a key length
+alter table t1 add primary key pti(pt(20));
+drop table t1;

mysql-test/t/gis.test

@@ -395,3 +395,11 @@ show create function fn3;
 select astext(fn3());
 drop function fn3;
 
+#
+# Bug #12267 (primary key over GIS)
+#
+create table t1(pt POINT);
+--error 1170
+alter table t1 add primary key pti(pt);
+alter table t1 add primary key pti(pt(20));
+drop table t1;

sql/sql_table.cc

@@ -1148,7 +1148,8 @@ static int mysql_prepare_table(THD *thd, HA_CREATE_INFO *create_info,
       {
 	column->length*= sql_field->charset->mbmaxlen;
 
-	if (f_is_blob(sql_field->pack_flag))
+	if (f_is_blob(sql_field->pack_flag) ||
+            (f_is_geom(sql_field->pack_flag) && key->type != Key::SPATIAL))
 	{
 	  if (!(file->table_flags() & HA_CAN_INDEX_BLOBS))
 	  {