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611806cd72
Since C99, there can be a trailing comma after the last value in an enum definition. A lot of new code has been introducing this style on the fly. Some new patches are now taking an inconsistent approach to this. Some add the last comma on the fly if they add a new last value, some are trying to preserve the existing style in each place, some are even dropping the last comma if there was one. We could nudge this all in a consistent direction if we just add the trailing commas everywhere once. I omitted a few places where there was a fixed "last" value that will always stay last. I also skipped the header files of libpq and ecpg, in case people want to use those with older compilers. There were also a small number of cases where the enum type wasn't used anywhere (but the enum values were), which ended up confusing pgindent a bit, so I left those alone. Discussion: https://www.postgresql.org/message-id/flat/386f8c45-c8ac-4681-8add-e3b0852c1620%40eisentraut.org
61 lines
1.8 KiB
C
61 lines
1.8 KiB
C
/*-------------------------------------------------------------------------
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*
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* lockoptions.h
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* Common header for some locking-related declarations.
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*
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*
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* Copyright (c) 2014-2023, PostgreSQL Global Development Group
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*
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* src/include/nodes/lockoptions.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef LOCKOPTIONS_H
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#define LOCKOPTIONS_H
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/*
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* This enum represents the different strengths of FOR UPDATE/SHARE clauses.
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* The ordering here is important, because the highest numerical value takes
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* precedence when a RTE is specified multiple ways. See applyLockingClause.
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*/
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typedef enum LockClauseStrength
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{
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LCS_NONE, /* no such clause - only used in PlanRowMark */
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LCS_FORKEYSHARE, /* FOR KEY SHARE */
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LCS_FORSHARE, /* FOR SHARE */
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LCS_FORNOKEYUPDATE, /* FOR NO KEY UPDATE */
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LCS_FORUPDATE, /* FOR UPDATE */
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} LockClauseStrength;
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/*
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* This enum controls how to deal with rows being locked by FOR UPDATE/SHARE
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* clauses (i.e., it represents the NOWAIT and SKIP LOCKED options).
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* The ordering here is important, because the highest numerical value takes
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* precedence when a RTE is specified multiple ways. See applyLockingClause.
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*/
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typedef enum LockWaitPolicy
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{
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/* Wait for the lock to become available (default behavior) */
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LockWaitBlock,
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/* Skip rows that can't be locked (SKIP LOCKED) */
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LockWaitSkip,
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/* Raise an error if a row cannot be locked (NOWAIT) */
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LockWaitError,
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} LockWaitPolicy;
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/*
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* Possible lock modes for a tuple.
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*/
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typedef enum LockTupleMode
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{
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/* SELECT FOR KEY SHARE */
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LockTupleKeyShare,
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/* SELECT FOR SHARE */
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LockTupleShare,
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/* SELECT FOR NO KEY UPDATE, and UPDATEs that don't modify key columns */
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LockTupleNoKeyExclusive,
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/* SELECT FOR UPDATE, UPDATEs that modify key columns, and DELETE */
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LockTupleExclusive,
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} LockTupleMode;
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#endif /* LOCKOPTIONS_H */
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