init

db_include/access/tupdesc_details.h

@@ -0,0 +1,28 @@
+/*-------------------------------------------------------------------------
+ *
+ * tupdesc_details.h
+ *	  POSTGRES tuple descriptor definitions we can't include everywhere
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/access/tupdesc_details.h
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#ifndef TUPDESC_DETAILS_H
+#define TUPDESC_DETAILS_H
+
+/*
+ * Structure used to represent value to be used when the attribute is not
+ * present at all in a tuple, i.e. when the column was created after the tuple
+ */
+typedef struct AttrMissing
+{
+	bool		am_present;		/* true if non-NULL missing value exists */
+	Datum		am_value;		/* value when attribute is missing */
+} AttrMissing;
+
+#endif							/* TUPDESC_DETAILS_H */