should be it

external/duckdb/third_party/libpg_query/include/access/attnum.hpp

@@ -0,0 +1,62 @@
+/*-------------------------------------------------------------------------
+ *
+ * attnum.h
+ *	  POSTGRES attribute number definitions.
+ *
+ *
+ * Portions Copyright (c) 1996-2017, PostgreSQL Global Development PGGroup
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/access/attnum.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#pragma once
+
+#include <cstdint>
+
+/*
+ * user defined attribute numbers start at 1.   -ay 2/95
+ */
+typedef int16_t PGAttrNumber;
+
+#define InvalidAttrNumber		0
+#define MaxAttrNumber			32767
+
+/* ----------------
+ *		support macros
+ * ----------------
+ */
+/*
+ * AttributeNumberIsValid
+ *		True iff the attribute number is valid.
+ */
+#define AttributeNumberIsValid(attributeNumber) \
+	((bool) ((attributeNumber) != InvalidAttrNumber))
+
+/*
+ * AttrNumberIsForUserDefinedAttr
+ *		True iff the attribute number corresponds to an user defined attribute.
+ */
+#define AttrNumberIsForUserDefinedAttr(attributeNumber) \
+	((bool) ((attributeNumber) > 0))
+
+/*
+ * AttrNumberGetAttrOffset
+ *		Returns the attribute offset for an attribute number.
+ *
+ * Note:
+ *		Assumes the attribute number is for a user defined attribute.
+ */
+#define AttrNumberGetAttrOffset(attNum) \
+( \
+	AssertMacro(AttrNumberIsForUserDefinedAttr(attNum)), \
+	((attNum) - 1) \
+)
+
+/*
+ * AttributeOffsetGetAttributeNumber
+ *		Returns the attribute number for an attribute offset.
+ */
+#define AttrOffsetGetAttrNumber(attributeOffset) \
+	 ((PGAttrNumber) (1 + (attributeOffset)))