Bug#27912873 CRASH: SEGMENTATION FAULT IN HA_INNOBASE::INDEX_TYPE()

Problem:
During ALTER, when adding foreign key on spatial index and
the reference table does not exist then hit explict assert case in
dict_table_check_for_dup_indexes().

Fix:
Since foreign key is not allowed on spatial index. Added check inside
dict_foreign_qualify_index(), if index->type is DICT_SPATIAL
then return false.

RB: 19968
Reviewed by : [email protected]

Author: sachinagarwal1111

storage/innobase/dict/dict0dict.cc

@@ -6728,6 +6728,11 @@ dict_foreign_qualify_index(
 		return(false);
 	}
 
+	if (index->type & DICT_SPATIAL) {
+		/* Spatial index cannot be used as foreign keys */
+		return(false);
+	}
+
 	for (ulint i = 0; i < n_cols; i++) {
 		dict_field_t*	field;
 		const char*	col_name;