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Diffstat (limited to 'src/include/access/visibilitymapdefs.h')
| -rw-r--r-- | src/include/access/visibilitymapdefs.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/include/access/visibilitymapdefs.h b/src/include/access/visibilitymapdefs.h new file mode 100644 index 0000000..58be5a4 --- /dev/null +++ b/src/include/access/visibilitymapdefs.h @@ -0,0 +1,25 @@ +/*------------------------------------------------------------------------- + * + * visibilitymapdefs.h + * macros for accessing contents of visibility map pages + * + * + * Copyright (c) 2021, 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 */ + +#endif /* VISIBILITYMAPDEFS_H */ |