Fix typos and grammar in comments and docs

Author: Justin Pryzby
Discussion: https://postgr.es/m/20210416070310.GG3315@telsasoft.com

src/backend/access/brin/brin.c

@@ -596,7 +596,7 @@ bringetbitmap(IndexScanDesc scan, TIDBitmap *tbm)
 					 * and if we're violating them. In that case we can
 					 * terminate early, without invoking the support function.
 					 *
-					 * As there may be more keys, we can only detemine
+					 * As there may be more keys, we can only determine
 					 * mismatch within this loop.
 					 */
 					if (bdesc->bd_info[attno - 1]->oi_regular_nulls &&
@@ -636,7 +636,7 @@ bringetbitmap(IndexScanDesc scan, TIDBitmap *tbm)
 
 					/*
 					 * Collation from the first key (has to be the same for
-					 * all keys for the same attribue).
+					 * all keys for the same attribute).
 					 */
 					collation = keys[attno - 1][0]->sk_collation;
 

src/backend/access/brin/brin_bloom.c

@@ -409,7 +409,7 @@ typedef struct BloomOpaque
 {
 	/*
 	 * XXX At this point we only need a single proc (to compute the hash), but
-	 * let's keep the array just like inclusion and minman opclasses, for
+	 * let's keep the array just like inclusion and minmax opclasses, for
 	 * consistency. We may need additional procs in the future.
 	 */
 	FmgrInfo	extra_procinfos[BLOOM_MAX_PROCNUMS];

src/backend/access/brin/brin_minmax_multi.c

@@ -248,7 +248,7 @@ typedef struct DistanceValue
 } DistanceValue;
 
 
-/* Cache for support and strategy procesures. */
+/* Cache for support and strategy procedures. */
 
 static FmgrInfo *minmax_multi_get_procinfo(BrinDesc *bdesc, uint16 attno,
 										   uint16 procnum);
@@ -1311,7 +1311,7 @@ compare_distances(const void *a, const void *b)
 }
 
 /*
- * Given an array of expanded ranges, compute distance of the gaps betwen
+ * Given an array of expanded ranges, compute distance of the gaps between
  * the ranges - for ncranges there are (ncranges-1) gaps.
  *
  * We simply call the "distance" function to compute the (max-min) for pairs
@@ -1623,7 +1623,7 @@ ensure_free_space_in_buffer(BrinDesc *bdesc, Oid colloid,
 	 *
 	 * We don't simply check against range->maxvalues again. The deduplication
 	 * might have freed very little space (e.g. just one value), forcing us to
-	 * do depuplication very often. In that case it's better to do compaction
+	 * do deduplication very often. In that case it's better to do compaction
 	 * and reduce more space.
 	 */
 	if (2 * range->nranges + range->nvalues <= range->maxvalues * MINMAX_BUFFER_LOAD_FACTOR)

src/backend/access/gist/gistbuild.c

@@ -115,7 +115,7 @@ typedef struct
 
 /*
  * In sorted build, we use a stack of these structs, one for each level,
- * to hold an in-memory buffer of the righmost page at the level. When the
+ * to hold an in-memory buffer of the rightmost page at the level. When the
  * page fills up, it is written out and a new page is allocated.
  */
 typedef struct GistSortedBuildPageState

src/backend/access/index/genam.c

@@ -633,7 +633,7 @@ systable_endscan(SysScanDesc sysscan)
  * Currently we do not support non-index-based scans here.  (In principle
  * we could do a heapscan and sort, but the uses are in places that
  * probably don't need to still work with corrupted catalog indexes.)
- * For the moment, therefore, these functions are merely the thinnest of
+ * For the moment, therefore, these functions are merely the thinest of
  * wrappers around index_beginscan/index_getnext_slot.  The main reason for
  * their existence is to centralize possible future support of lossy operators
  * in catalog scans.

src/backend/access/nbtree/nbtpage.c

@@ -1398,7 +1398,7 @@ _bt_delitems_delete(Relation rel, Buffer buf, TransactionId latestRemovedXid,
  * _bt_delitems_delete.  These steps must take place before each function's
  * critical section begins.
  *
- * updatabable and nupdatable are inputs, though note that we will use
+ * updatable and nupdatable are inputs, though note that we will use
  * _bt_update_posting() to replace the original itup with a pointer to a final
  * version in palloc()'d memory.  Caller should free the tuples when its done.
  *
@@ -1504,7 +1504,7 @@ _bt_delitems_cmp(const void *a, const void *b)
  * some extra index tuples that were practically free for tableam to check in
  * passing (when they actually turn out to be safe to delete).  It probably
  * only makes sense for the tableam to go ahead with these extra checks when
- * it is block-orientated (otherwise the checks probably won't be practically
+ * it is block-oriented (otherwise the checks probably won't be practically
  * free, which we rely on).  The tableam interface requires the tableam side
  * to handle the problem, though, so this is okay (we as an index AM are free
  * to make the simplifying assumption that all tableams must be block-based).

src/backend/catalog/pg_type.c

@@ -997,7 +997,7 @@ makeMultirangeTypeName(const char *rangeTypeName, Oid typeNamespace)
  * makeUniqueTypeName
  *		Generate a unique name for a prospective new type
  *
- * Given a typeName, return a new palloc'ed name by preprending underscores
+ * Given a typeName, return a new palloc'ed name by prepending underscores
  * until a non-conflicting name results.
  *
  * If tryOriginal, first try with zero underscores.

src/backend/commands/analyze.c

@@ -660,7 +660,7 @@ do_analyze_rel(Relation onerel, VacuumParams *params,
 	{
 		/*
 		 * Partitioned tables don't have storage, so we don't set any fields in
-		 * their pg_class entries except for relpages, which is necessary for
+		 * their pg_class entries except for reltuples, which is necessary for
 		 * auto-analyze to work properly.
 		 */
 		vac_update_relstats(onerel, -1, totalrows,

src/backend/executor/nodeIncrementalSort.c

@@ -661,9 +661,9 @@ ExecIncrementalSort(PlanState *pstate)
 			/*
 			 * We're in full sort mode accumulating a minimum number of tuples
 			 * and not checking for prefix key equality yet, so we can't
-			 * assume the group pivot tuple will reamin the same -- unless
+			 * assume the group pivot tuple will remain the same -- unless
 			 * we're using a minimum group size of 1, in which case the pivot
-			 * is obviously still the pviot.
+			 * is obviously still the pivot.
 			 */
 			if (nTuples != minGroupSize)
 				ExecClearTuple(node->group_pivot);
@@ -1162,7 +1162,7 @@ ExecReScanIncrementalSort(IncrementalSortState *node)
 	}
 
 	/*
-	 * If chgParam of subnode is not null, theni the plan will be re-scanned
+	 * If chgParam of subnode is not null, then the plan will be re-scanned
 	 * by the first ExecProcNode.
 	 */
 	if (outerPlan->chgParam == NULL)

src/backend/rewrite/rewriteSearchCycle.c

@@ -59,7 +59,7 @@
  * SQL standard actually does it in that more complicated way), but the
  * internal representation allows us to construct it this way.)
  *
- * With a search caluse
+ * With a search clause
  *
  * SEARCH DEPTH FIRST BY col1, col2 SET sqc
  *

src/backend/statistics/dependencies.c

@@ -972,7 +972,7 @@ find_strongest_dependency(MVDependencies **dependencies, int ndependencies,
 /*
  * clauselist_apply_dependencies
  *		Apply the specified functional dependencies to a list of clauses and
- *		return the estimated selecvitity of the clauses that are compatible
+ *		return the estimated selectivity of the clauses that are compatible
  *		with any of the given dependencies.
  *
  * This will estimate all not-already-estimated clauses that are compatible
@@ -1450,7 +1450,7 @@ dependencies_clauselist_selectivity(PlannerInfo *root,
 		if (!bms_is_member(listidx, *estimatedclauses))
 		{
 			/*
-			 * If it's a simple column refrence, just extract the attnum. If
+			 * If it's a simple column reference, just extract the attnum. If
 			 * it's an expression, assign a negative attnum as if it was a
 			 * system attribute.
 			 */

src/backend/statistics/extended_stats.c

@@ -358,7 +358,7 @@ statext_compute_stattarget(int stattarget, int nattrs, VacAttrStats **stats)
 	 */
 	for (i = 0; i < nattrs; i++)
 	{
-		/* keep the maximmum statistics target */
+		/* keep the maximum statistics target */
 		if (stats[i]->attr->attstattarget > stattarget)
 			stattarget = stats[i]->attr->attstattarget;
 	}

src/backend/storage/ipc/procarray.c

@@ -2131,7 +2131,7 @@ GetSnapshotDataReuse(Snapshot snapshot)
  *			older than this are known not running any more.
  *
  * And try to advance the bounds of GlobalVis{Shared,Catalog,Data,Temp}Rels
- * for the benefit of theGlobalVisTest* family of functions.
+ * for the benefit of the GlobalVisTest* family of functions.
  *
  * Note: this function should probably not be called with an argument that's
  * not statically allocated (see xip allocation below).

src/backend/tsearch/spell.c

@@ -2020,7 +2020,7 @@ NISortAffixes(IspellDict *Conf)
 						 (const unsigned char *) Affix->repl,
 						 (ptr - 1)->len))
 			{
-				/* leave only unique and minimals suffixes */
+				/* leave only unique and minimal suffixes */
 				ptr->affix = Affix->repl;
 				ptr->len = Affix->replen;
 				ptr->issuffix = issuffix;

src/backend/utils/activity/backend_status.c

@@ -1032,10 +1032,10 @@ pgstat_get_my_queryid(void)
 	if (!MyBEEntry)
 		return 0;
 
-	/* There's no need for a look around pgstat_begin_read_activity /
+	/* There's no need for a lock around pgstat_begin_read_activity /
 	 * pgstat_end_read_activity here as it's only called from
 	 * pg_stat_get_activity which is already protected, or from the same
-	 * backend which mean that there won't be concurrent write.
+	 * backend which means that there won't be concurrent writes.
 	 */
 	return MyBEEntry->st_queryid;
 }

src/backend/utils/adt/multirangetypes.c

@@ -553,7 +553,7 @@ multirange_get_typcache(FunctionCallInfo fcinfo, Oid mltrngtypid)
 
 
 /*
- * Estimate size occupied by serialized multirage.
+ * Estimate size occupied by serialized multirange.
  */
 static Size
 multirange_size_estimate(TypeCacheEntry *rangetyp, int32 range_count,

src/backend/utils/adt/selfuncs.c

@@ -4039,7 +4039,7 @@ estimate_multivariate_ndistinct(PlannerInfo *root, RelOptInfo *rel,
 
 			/*
 			 * Process a simple Var expression, by matching it to keys
-			 * directly. If there's a matchine expression, we'll try
+			 * directly. If there's a matching expression, we'll try
 			 * matching it later.
 			 */
 			if (IsA(varinfo->var, Var))

src/bin/pg_rewind/pg_rewind.c

@@ -605,7 +605,7 @@ perform_rewind(filemap_t *filemap, rewind_source *source,
 	 * and the target. But if the source is a standby server, it's possible
 	 * that the last common checkpoint is *after* the standby's restartpoint.
 	 * That implies that the source server has applied the checkpoint record,
-	 * but hasn't perfomed a corresponding restartpoint yet. Make sure we
+	 * but hasn't performed a corresponding restartpoint yet. Make sure we
 	 * start at the restartpoint's redo point in that case.
 	 *
 	 * Use the old version of the source's control file for this. The server

src/bin/pg_waldump/pg_waldump.c

@@ -323,7 +323,7 @@ WALDumpCloseSegment(XLogReaderState *state)
 }
 
 /*
- * pg_waldump's WAL page rader
+ * pg_waldump's WAL page reader
  *
  * timeline and startptr specifies the LSN, and reads up to endptr.
  */

src/common/hmac_openssl.c

@@ -34,7 +34,7 @@
 
 /*
  * In backend, use an allocation in TopMemoryContext to count for resowner
- * cleanup handling if necesary.  For versions of OpenSSL where HMAC_CTX is
+ * cleanup handling if necessary.  For versions of OpenSSL where HMAC_CTX is
  * known, just use palloc().  In frontend, use malloc to be able to return
  * a failure status back to the caller.
  */

src/common/pg_lzcompress.c

@@ -147,7 +147,7 @@
  *
  *			For each subsequent entry in the history list, the "good_match"
  *			is lowered by 10%. So the compressor will be more happy with
- *			short matches the farer it has to go back in the history.
+ *			short matches the further it has to go back in the history.
  *			Another "speed against ratio" preference characteristic of
  *			the algorithm.
  *

src/interfaces/ecpg/preproc/ecpg.c

@@ -375,7 +375,7 @@ main(int argc, char *const argv[])
 				}
 				cur = NULL;
 
-				/* remove old delared statements if any are still there */
+				/* remove old declared statements if any are still there */
 				for (list = g_declared_list; list != NULL;)
 				{
 					struct declared_list *this = list;

src/port/bsearch_arg.c

@@ -43,7 +43,7 @@
  * is odd, moving left simply involves halving lim: e.g., when lim
  * is 5 we look at item 2, so we change lim to 2 so that we will
  * look at items 0 & 1.  If lim is even, the same applies.  If lim
- * is odd, moving right again involes halving lim, this time moving
+ * is odd, moving right again involves halving lim, this time moving
  * the base up one item past p: e.g., when lim is 5 we change base
  * to item 3 and make lim 2 so that we will look at items 3 and 4.
  * If lim is even, however, we have to shrink it by one before