Additional fix for bug #12267 (Can't use POINT for primary key)

mysql-test/r/gis.result:
  result fixed
mysql-test/t/gis.test:
  testcase added
sql/sql_table.cc:
  no need to specify keylength for Point type
sql/sql_yacc.yy:
  no need to specify length for Point type

mysql-test/r/gis.result

@@ -682,6 +682,9 @@ POINT(1 1)
 drop function fn3;
 create table t1(pt POINT);
 alter table t1 add primary key pti(pt);
+drop table t1;
+create table t1(pt GEOMETRY);
+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

@@ -399,6 +399,9 @@ drop function fn3;
 # Bug #12267 (primary key over GIS)
 #
 create table t1(pt POINT);
+alter table t1 add primary key pti(pt);
+drop table t1;
+create table t1(pt GEOMETRY);
 --error 1170
 alter table t1 add primary key pti(pt);
 alter table t1 add primary key pti(pt(20));

sql/sql_table.cc

@@ -1156,6 +1156,9 @@ static int mysql_prepare_table(THD *thd, HA_CREATE_INFO *create_info,
 	    my_error(ER_BLOB_USED_AS_KEY, MYF(0), column->field_name);
 	    DBUG_RETURN(-1);
 	  }
+          if (f_is_geom(sql_field->pack_flag) && sql_field->geom_type ==
+              Field::GEOM_POINT)
+            column->length= 21;
 	  if (!column->length)
 	  {
 	    my_error(ER_BLOB_KEY_WITHOUT_LENGTH, MYF(0), column->field_name);

sql/sql_yacc.yy

@@ -2969,7 +2969,9 @@ type:
 spatial_type:
 	GEOMETRY_SYM	      { $$= Field::GEOM_GEOMETRY; }
 	| GEOMETRYCOLLECTION  { $$= Field::GEOM_GEOMETRYCOLLECTION; }
-	| POINT_SYM           { $$= Field::GEOM_POINT; }
+	| POINT_SYM           { Lex->length= (char*)"21";
+                                $$= Field::GEOM_POINT;
+                              }
 	| MULTIPOINT          { $$= Field::GEOM_MULTIPOINT; }
 	| LINESTRING          { $$= Field::GEOM_LINESTRING; }
 	| MULTILINESTRING     { $$= Field::GEOM_MULTILINESTRING; }