35 lines
1.1 KiB
C
35 lines
1.1 KiB
C
/*-------------------------------------------------------------------------
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*
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* visibilitymapdefs.h
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* macros for accessing contents of visibility map pages
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*
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*
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* Copyright (c) 2021-2023, PostgreSQL Global Development Group
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*
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* src/include/access/visibilitymapdefs.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef VISIBILITYMAPDEFS_H
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#define VISIBILITYMAPDEFS_H
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/* Number of bits for one heap page */
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#define BITS_PER_HEAPBLOCK 2
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/* Flags for bit map */
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#define VISIBILITYMAP_ALL_VISIBLE 0x01
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#define VISIBILITYMAP_ALL_FROZEN 0x02
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#define VISIBILITYMAP_VALID_BITS 0x03 /* OR of all valid visibilitymap
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* flags bits */
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/*
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* To detect recovery conflicts during logical decoding on a standby, we need
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* to know if a table is a user catalog table. For that we add an additional
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* bit into xl_heap_visible.flags, in addition to the above.
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*
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* NB: VISIBILITYMAP_XLOG_* may not be passed to visibilitymap_set().
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*/
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#define VISIBILITYMAP_XLOG_CATALOG_REL 0x04
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#define VISIBILITYMAP_XLOG_VALID_BITS (VISIBILITYMAP_VALID_BITS | VISIBILITYMAP_XLOG_CATALOG_REL)
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#endif /* VISIBILITYMAPDEFS_H */
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