26 lines
719 B
C
26 lines
719 B
C
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/*-------------------------------------------------------------------------
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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, 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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#endif /* VISIBILITYMAPDEFS_H */
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