--- /dev/null
+/*-------------------------------------------------------------------------
+ *
+ * sequence.h--
+ * prototypes for sequence.c.
+ *
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef SEQUENCE_H
+#define SEQUENCE_H
+
+/*
+ * Columns of a sequnece relation
+ */
+
+#define SEQ_COL_NAME 1
+#define SEQ_COL_LASTVAL 2
+#define SEQ_COL_INCBY 3
+#define SEQ_COL_MAXVALUE 4
+#define SEQ_COL_MINVALUE 5
+#define SEQ_COL_CACHE 6
+#define SEQ_COL_CYCLE 7
+#define SEQ_COL_CALLED 8
+
+#define SEQ_COL_FIRSTCOL SEQ_COL_NAME
+#define SEQ_COL_LASTCOL SEQ_COL_CALLED
+
+extern void DefineSequence (CreateSeqStmt *stmt);
+extern int4 nextval (struct varlena *seqname);
+extern int4 currval (struct varlena *seqname);
+extern void CloseSequences (void);
+
+#endif /* SEQUENCE_H */