Bug#50574 5.5.x allows spatial indexes on non-spatial columns,

          causing crashes!

Adding a SPATIAL INDEX on a non-geometrical column caused a
segmentation fault when the table was subsequently 
inserted into.
      
A test was added in mysql_prepare_create_table to explicitly
check whether non-geometrical columns are used in a
spatial index, and throw an error if so.

mysql-test/r/gis.result

@@ -1058,3 +1058,33 @@ SELECT Polygon(12345123,'');
 Polygon(12345123,'')
 NULL
 End of 5.1 tests
+CREATE TABLE t1(
+col0 BINARY NOT NULL,
+col2 TIMESTAMP,
+SPATIAL INDEX i1 (col0)
+) ENGINE=MyISAM;
+ERROR 42000: A SPATIAL index may only contain a geometrical type column
+CREATE TABLE t1 (
+col0 BINARY NOT NULL,
+col2 TIMESTAMP
+) ENGINE=MyISAM;
+CREATE SPATIAL INDEX idx0 ON t1(col0);
+ERROR 42000: A SPATIAL index may only contain a geometrical type column
+ALTER TABLE t1 ADD SPATIAL INDEX i1 (col0);
+ERROR 42000: A SPATIAL index may only contain a geometrical type column
+CREATE TABLE t2 (
+col0 INTEGER NOT NULL,
+col1 POINT,
+col2 POINT
+);
+CREATE SPATIAL INDEX idx0 ON t2 (col1, col2);
+ERROR HY000: Incorrect arguments to SPATIAL INDEX
+CREATE TABLE t3 (
+col0 INTEGER NOT NULL,
+col1 POINT,
+col2 LINESTRING,
+SPATIAL INDEX i1 (col1, col2)
+);
+ERROR HY000: Incorrect arguments to SPATIAL INDEX
+DROP TABLE t1;
+DROP TABLE t2;

mysql-test/t/gis.test

@@ -723,3 +723,48 @@ SELECT Polygon(1234512,'');
 SELECT Polygon(12345123,'');
 
 --echo End of 5.1 tests
+
+#
+# Bug #50574 5.5.x allows spatial indexes on non-spatial 
+#           columns, causing crashes!
+#
+--error ER_SPATIAL_MUST_HAVE_GEOM_COL
+CREATE TABLE t1(
+  col0 BINARY NOT NULL,
+  col2 TIMESTAMP,
+  SPATIAL INDEX i1 (col0)
+) ENGINE=MyISAM;
+
+# Test other ways to add indices
+CREATE TABLE t1 (
+  col0 BINARY NOT NULL,
+  col2 TIMESTAMP
+) ENGINE=MyISAM;
+
+--error ER_SPATIAL_MUST_HAVE_GEOM_COL
+CREATE SPATIAL INDEX idx0 ON t1(col0);
+
+--error ER_SPATIAL_MUST_HAVE_GEOM_COL
+ALTER TABLE t1 ADD SPATIAL INDEX i1 (col0);
+
+CREATE TABLE t2 (
+  col0 INTEGER NOT NULL,
+  col1 POINT,
+  col2 POINT
+);
+
+--error ER_WRONG_ARGUMENTS
+CREATE SPATIAL INDEX idx0 ON t2 (col1, col2);
+
+--error ER_WRONG_ARGUMENTS
+CREATE TABLE t3 (
+  col0 INTEGER NOT NULL,
+  col1 POINT,
+  col2 LINESTRING,
+  SPATIAL INDEX i1 (col1, col2)
+);
+
+# cleanup
+DROP TABLE t1;
+DROP TABLE t2;
+

sql/share/errmsg-utf8.txt

@@ -6260,3 +6260,5 @@ ER_FIELD_TYPE_NOT_ALLOWED_AS_PARTITION_FIELD
   eng "Field '%-.192s' is of a not allowed type for this type of partitioning"
 ER_PARTITION_FIELDS_TOO_LONG
   eng "The total length of the partitioning fields is too large"
+ER_SPATIAL_MUST_HAVE_GEOM_COL 42000
+  eng "A SPATIAL index may only contain a geometrical type column"

sql/sql_table.cc

@@ -3193,11 +3193,19 @@ mysql_prepare_create_table(THD *thd, HA_CREATE_INFO *create_info,
       {
 	column->length*= sql_field->charset->mbmaxlen;
 
-        if (key->type == Key::SPATIAL && column->length)
+        if (key->type == Key::SPATIAL)
+        {
+          if (column->length)
           {
             my_error(ER_WRONG_SUB_KEY, MYF(0));
             DBUG_RETURN(TRUE);
           }
+          if (!f_is_geom(sql_field->pack_flag))
+          {
+            my_error(ER_SPATIAL_MUST_HAVE_GEOM_COL, MYF(0));
+            DBUG_RETURN(TRUE);
+          }
+        }
 
 	if (f_is_blob(sql_field->pack_flag) ||
             (f_is_geom(sql_field->pack_flag) && key->type != Key::SPATIAL))