Add macro RelationIsPermanent() to report relation permanence

Previously, to check relation permanence, the Relation's Form_pg_class
structure member relpersistence was compared to the value
RELPERSISTENCE_PERMANENT ("p"). This commit adds the macro
RelationIsPermanent() and is used in appropirate places to simplify the
code.  This matches other RelationIs* macros.

This macro will be used in more places in future cluster file encryption
patches.

Discussion: https://postgr.es/m/20210318153134.GH20766@tamriel.snowman.net

diff --git a/src/backend/access/gist/gistutil.c b/src/backend/access/gist/gistutil.c
index a3ec9f2cfe4249d7e80ffcbc91d840a2f316b9bb..1ff1bf816f1b45f6e342a83b971e6726f9a94529 100644 (file)
--- a/src/backend/access/gist/gistutil.c
+++ b/src/backend/access/gist/gistutil.c
@@ -1036,7 +1036,7 @@ gistGetFakeLSN(Relation rel)
 
        return counter++;
    }
-   else if (rel->rd_rel->relpersistence == RELPERSISTENCE_PERMANENT)
+   else if (RelationIsPermanent(rel))
    {
        /*
         * WAL-logging on this relation will start after commit, so its LSNs

diff --git a/src/backend/access/heap/heapam_handler.c b/src/backend/access/heap/heapam_handler.c
index 7b475f2950ce86d5a012f6a370f2469d3950735c..7a9a640989ab64ae036ab3e721bdbb41eb928cc6 100644 (file)
--- a/src/backend/access/heap/heapam_handler.c
+++ b/src/backend/access/heap/heapam_handler.c
@@ -662,7 +662,7 @@ heapam_relation_copy_data(Relation rel, const RelFileNode *newrnode)
             * WAL log creation if the relation is persistent, or this is the
             * init fork of an unlogged relation.
             */
-           if (rel->rd_rel->relpersistence == RELPERSISTENCE_PERMANENT ||
+           if (RelationIsPermanent(rel) ||
                (rel->rd_rel->relpersistence == RELPERSISTENCE_UNLOGGED &&
                 forkNum == INIT_FORKNUM))
                log_smgrcreate(newrnode, forkNum);

diff --git a/src/backend/catalog/pg_publication.c b/src/backend/catalog/pg_publication.c
index 84d2efcfd2f1624c25574daa80c9ffc52558894f..86e415af8923f6cbb1e3487bf63ac11def1915a4 100644 (file)
--- a/src/backend/catalog/pg_publication.c
+++ b/src/backend/catalog/pg_publication.c
@@ -67,7 +67,7 @@ check_publication_add_relation(Relation targetrel)
                 errdetail("System tables cannot be added to publications.")));
 
    /* UNLOGGED and TEMP relations cannot be part of publication. */
-   if (targetrel->rd_rel->relpersistence != RELPERSISTENCE_PERMANENT)
+   if (!RelationIsPermanent(targetrel))
        ereport(ERROR,
                (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
                 errmsg("table \"%s\" cannot be replicated",

diff --git a/src/backend/commands/tablecmds.c b/src/backend/commands/tablecmds.c
index 54fea31e43fd6700ea639cd7e4683984f6a7ed95..3349bcfaa747aa5ab6b18a79cf5d05655b51f8f3 100644 (file)
--- a/src/backend/commands/tablecmds.c
+++ b/src/backend/commands/tablecmds.c
@@ -8650,13 +8650,13 @@ ATAddForeignKeyConstraint(List **wqueue, AlteredTableInfo *tab, Relation rel,
    switch (rel->rd_rel->relpersistence)
    {
        case RELPERSISTENCE_PERMANENT:
-           if (pkrel->rd_rel->relpersistence != RELPERSISTENCE_PERMANENT)
+           if (!RelationIsPermanent(pkrel))
                ereport(ERROR,
                        (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
                         errmsg("constraints on permanent tables may reference only permanent tables")));
            break;
        case RELPERSISTENCE_UNLOGGED:
-           if (pkrel->rd_rel->relpersistence != RELPERSISTENCE_PERMANENT
+           if (!RelationIsPermanent(pkrel)
                && pkrel->rd_rel->relpersistence != RELPERSISTENCE_UNLOGGED)
                ereport(ERROR,
                        (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
@@ -13712,7 +13712,7 @@ index_copy_data(Relation rel, RelFileNode newrnode)
             * WAL log creation if the relation is persistent, or this is the
             * init fork of an unlogged relation.
             */
-           if (rel->rd_rel->relpersistence == RELPERSISTENCE_PERMANENT ||
+           if (RelationIsPermanent(rel) ||
                (rel->rd_rel->relpersistence == RELPERSISTENCE_UNLOGGED &&
                 forkNum == INIT_FORKNUM))
                log_smgrcreate(&newrnode, forkNum);
@@ -15230,7 +15230,7 @@ ATPrepChangePersistence(Relation rel, bool toLogged)
 
            if (toLogged)
            {
-               if (foreignrel->rd_rel->relpersistence != RELPERSISTENCE_PERMANENT)
+               if (!RelationIsPermanent(foreignrel))
                    ereport(ERROR,
                            (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
                             errmsg("could not change table \"%s\" to logged because it references unlogged table \"%s\"",
@@ -15240,7 +15240,7 @@ ATPrepChangePersistence(Relation rel, bool toLogged)
            }
            else
            {
-               if (foreignrel->rd_rel->relpersistence == RELPERSISTENCE_PERMANENT)
+               if (RelationIsPermanent(foreignrel))
                    ereport(ERROR,
                            (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
                             errmsg("could not change table \"%s\" to unlogged because it references logged table \"%s\"",

diff --git a/src/backend/optimizer/util/plancat.c b/src/backend/optimizer/util/plancat.c
index c5947fa41851bed1fe97ac996f7e03c8acc13d33..7f2e40ae39e9f7c0e84c8baa2e0d4367fbc61637 100644 (file)
--- a/src/backend/optimizer/util/plancat.c
+++ b/src/backend/optimizer/util/plancat.c
@@ -126,8 +126,7 @@ get_relation_info(PlannerInfo *root, Oid relationObjectId, bool inhparent,
    relation = table_open(relationObjectId, NoLock);
 
    /* Temporary and unlogged relations are inaccessible during recovery. */
-   if (relation->rd_rel->relpersistence != RELPERSISTENCE_PERMANENT &&
-       RecoveryInProgress())
+   if (!RelationIsPermanent(relation) && RecoveryInProgress())
        ereport(ERROR,
                (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                 errmsg("cannot access temporary or unlogged relations during recovery")));

diff --git a/src/backend/utils/cache/relcache.c b/src/backend/utils/cache/relcache.c
index 20be094f460ebad7298893b0d38d7f5e93945dc0..ff7395c85b5c1156d4b0ca9e70d5e23a6d06c3fe 100644 (file)
--- a/src/backend/utils/cache/relcache.c
+++ b/src/backend/utils/cache/relcache.c
@@ -2990,7 +2990,7 @@ static void
 AssertPendingSyncConsistency(Relation relation)
 {
    bool        relcache_verdict =
-   relation->rd_rel->relpersistence == RELPERSISTENCE_PERMANENT &&
+   RelationIsPermanent(relation) &&
    ((relation->rd_createSubid != InvalidSubTransactionId &&
      RELKIND_HAS_STORAGE(relation->rd_rel->relkind)) ||
     relation->rd_firstRelfilenodeSubid != InvalidSubTransactionId);

diff --git a/src/include/utils/rel.h b/src/include/utils/rel.h
index 5375a37dd19b210f4632bb4436ba1b972e44f77a..8eee1c1a835c6907509ece4f8c3808530dafe7dc 100644 (file)
--- a/src/include/utils/rel.h
+++ b/src/include/utils/rel.h
@@ -577,6 +577,13 @@ typedef struct PartitionedTableRdOptions
        (relation)->rd_smgr->smgr_targblock = (targblock); \
    } while (0)
 
+/*
+ * RelationIsPermanent
+ *     True if relation is permanent.
+ */
+#define RelationIsPermanent(relation) \
+   ((relation)->rd_rel->relpersistence == RELPERSISTENCE_PERMANENT)
+
 /*
  * RelationNeedsWAL
  *     True if relation needs WAL.
@@ -586,8 +593,7 @@ typedef struct PartitionedTableRdOptions
  * RelFileNode" in src/backend/access/transam/README.
  */
 #define RelationNeedsWAL(relation)                                     \
-   ((relation)->rd_rel->relpersistence == RELPERSISTENCE_PERMANENT &&  \
-    (XLogIsNeeded() ||                                                 \
+   (RelationIsPermanent(relation) && (XLogIsNeeded() ||                \
      (relation->rd_createSubid == InvalidSubTransactionId &&           \
       relation->rd_firstRelfilenodeSubid == InvalidSubTransactionId)))
 

diff --git a/src/include/utils/snapmgr.h b/src/include/utils/snapmgr.h
index 2c8b881a09daedbcd77f7475cf6a263eea296dce..f66ac5818859460bbc1a40fd11f2893cfe47e90c 100644 (file)
--- a/src/include/utils/snapmgr.h
+++ b/src/include/utils/snapmgr.h
@@ -37,8 +37,7 @@
  */
 #define RelationAllowsEarlyPruning(rel) \
 ( \
-    (rel)->rd_rel->relpersistence == RELPERSISTENCE_PERMANENT  \
-  && !IsCatalogRelation(rel) \
+    RelationIsPermanent(rel) && !IsCatalogRelation(rel) \
   && !RelationIsAccessibleInLogicalDecoding(rel) \
 )