Fix typos in comments

The changes done in this commit impact comments with no direct
user-visible changes, with fixes for incorrect function, variable or
structure names.

Author: Alexander Lakhin
Discussion: https://postgr.es/m/e8c38840-596a-83d6-bd8d-cebc51111572@gmail.com

3 files changed, 7 insertions, 7 deletions

diff --git a/src/backend/commands/opclasscmds.c b/src/backend/commands/opclasscmds.c
index 864e35e45b4..5f7ee238863 100644
--- a/src/backend/commands/opclasscmds.c
+++ b/src/backend/commands/opclasscmds.c
@@ -819,7 +819,7 @@ AlterOpFamily(AlterOpFamilyStmt *stmt)
 	Oid			amoid,			/* our AM's oid */
 				opfamilyoid;	/* oid of opfamily */
 	int			maxOpNumber,	/* amstrategies value */
-				optsProcNumber, /* amopclassopts value */
+				optsProcNumber, /* amoptsprocnum value */
 				maxProcNumber;	/* amsupport value */
 	HeapTuple	tup;
 	Form_pg_am	amform;
@@ -1321,7 +1321,7 @@ assignProcTypes(OpFamilyMember *member, Oid amoid, Oid typeoid,
 			/*
 			 * pg_amproc functions are indexed by (lefttype, righttype), but
 			 * an equalimage function can only be called at CREATE INDEX time.
-			 * The same opclass opcintype OID is always used for leftype and
+			 * The same opclass opcintype OID is always used for lefttype and
 			 * righttype.  Providing a cross-type routine isn't sensible.
 			 * Reject cross-type ALTER OPERATOR FAMILY ...  ADD FUNCTION 4
 			 * statements here.
diff --git a/src/backend/commands/subscriptioncmds.c b/src/backend/commands/subscriptioncmds.c
index 56eafbff10a..8b3de032eee 100644
--- a/src/backend/commands/subscriptioncmds.c
+++ b/src/backend/commands/subscriptioncmds.c
@@ -974,8 +974,8 @@ AlterSubscription_refresh(Subscription *sub, bool copy_data,
 				 *
 				 * Even if new worker for this particular rel is restarted it
 				 * won't be able to make any progress as we hold exclusive
-				 * lock on subscription_rel till the transaction end. It will
-				 * simply exit as there is no corresponding rel entry.
+				 * lock on pg_subscription_rel till the transaction end. It
+				 * will simply exit as there is no corresponding rel entry.
 				 *
 				 * This locking also ensures that the state of rels won't
 				 * change till we are done with this refresh operation.
diff --git a/src/backend/commands/tablecmds.c b/src/backend/commands/tablecmds.c
index 343fe611151..c7a8a689b7c 100644
--- a/src/backend/commands/tablecmds.c
+++ b/src/backend/commands/tablecmds.c
@@ -2984,7 +2984,7 @@ MergeAttributes(List *schema, List *supers, char relpersistence,
 				 * generated column, we'll take its generation expression in
 				 * preference to the parent's.  We must check that the child
 				 * column doesn't specify a default value or identity, which
-				 * matches the rules for a single column in parse_util.c.
+				 * matches the rules for a single column in parse_utilcmd.c.
 				 *
 				 * Conversely, if the parent column is not generated, the
 				 * child column can't be either.  (We used to allow that, but
@@ -8017,7 +8017,7 @@ ATPrepDropExpression(Relation rel, AlterTableCmd *cmd, bool recurse, bool recurs
 	 * is a bit complicated.  GENERATED clauses must be attached to the column
 	 * definition and cannot be added later like DEFAULT, so if a child table
 	 * has a generation expression that the parent does not have, the child
-	 * column will necessarily be an attlocal column.  So to implement ONLY
+	 * column will necessarily be an attislocal column.  So to implement ONLY
 	 * here, we'd need extra code to update attislocal of the direct child
 	 * tables, somewhat similar to how DROP COLUMN does it, so that the
 	 * resulting state can be properly dumped and restored.
@@ -10930,7 +10930,7 @@ ATExecAlterConstraint(Relation rel, AlterTableCmd *cmd, bool recurse,
 	}
 
 	/*
-	 * ATExecConstrRecurse already invalidated relcache for the relations
+	 * ATExecAlterConstrRecurse already invalidated relcache for the relations
 	 * having the constraint itself; here we also invalidate for relations
 	 * that have any triggers that are part of the constraint.
 	 */