1 files changed, 34 insertions, 0 deletions
diff --git a/src/include/access/visibilitymapdefs.h b/src/include/access/visibilitymapdefs.h
new file mode 100644
index 0000000..8dfdbfa
--- /dev/null
+++ b/src/include/access/visibilitymapdefs.h
@@ -0,0 +1,34 @@
+/*-------------------------------------------------------------------------
+ *
+ * visibilitymapdefs.h
+ *		macros for accessing contents of visibility map pages
+ *
+ *
+ * Copyright (c) 2021-2023, PostgreSQL Global Development Group
+ *
+ * src/include/access/visibilitymapdefs.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef VISIBILITYMAPDEFS_H
+#define VISIBILITYMAPDEFS_H
+
+/* Number of bits for one heap page */
+#define BITS_PER_HEAPBLOCK 2
+
+/* Flags for bit map */
+#define VISIBILITYMAP_ALL_VISIBLE	0x01
+#define VISIBILITYMAP_ALL_FROZEN	0x02
+#define VISIBILITYMAP_VALID_BITS	0x03	/* OR of all valid visibilitymap
+											 * flags bits */
+/*
+ * To detect recovery conflicts during logical decoding on a standby, we need
+ * to know if a table is a user catalog table. For that we add an additional
+ * bit into xl_heap_visible.flags, in addition to the above.
+ *
+ * NB: VISIBILITYMAP_XLOG_* may not be passed to visibilitymap_set().
+ */
+#define VISIBILITYMAP_XLOG_CATALOG_REL	0x04
+#define VISIBILITYMAP_XLOG_VALID_BITS	(VISIBILITYMAP_VALID_BITS | VISIBILITYMAP_XLOG_CATALOG_REL)
+
+#endif							/* VISIBILITYMAPDEFS_H */