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diff --git a/src/include/optimizer/geqo_selection.h b/src/include/optimizer/geqo_selection.h
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+/*-------------------------------------------------------------------------
+ *
+ * geqo_selection.h
+ * prototypes for selection routines in optimizer/geqo
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/optimizer/geqo_selection.h
+ *
+ *-------------------------------------------------------------------------
+ */
+
+/* contributed by:
+ =*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=
+ * Martin Utesch * Institute of Automatic Control *
+ = = University of Mining and Technology =
+ * utesch@aut.tu-freiberg.de * Freiberg, Germany *
+ =*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=
+ */
+
+
+#ifndef GEQO_SELECTION_H
+#define GEQO_SELECTION_H
+
+#include "optimizer/geqo.h"
+
+
+extern void geqo_selection(PlannerInfo *root,
+ Chromosome *momma, Chromosome *daddy,
+ Pool *pool, double bias);
+
+#endif /* GEQO_SELECTION_H */