diff --git a/contrib/test_decoding/expected/binary.out b/contrib/test_decoding/expected/binary.out
index d094920100..b3a3509595 100644
--- a/contrib/test_decoding/expected/binary.out
+++ b/contrib/test_decoding/expected/binary.out
@@ -14,7 +14,7 @@ SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'for
 
 -- fails, binary plugin, textual consumer
 SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'force-binary', '1', 'skip-empty-xacts', '1');
-ERROR:  logical decoding output plugin "test_decoding" produces binary output, but "pg_logical_slot_get_changes(name,pg_lsn,integer,text[])" expects textual data
+ERROR:  logical decoding output plugin "test_decoding" produces binary output, but function "pg_logical_slot_get_changes(name,pg_lsn,integer,text[])" expects textual data
 -- succeeds, textual plugin, binary consumer
 SELECT data FROM pg_logical_slot_get_binary_changes('regression_slot', NULL, NULL, 'force-binary', '0', 'skip-empty-xacts', '1');
  data 
diff --git a/src/backend/access/transam/multixact.c b/src/backend/access/transam/multixact.c
index 9571d0760a..7d97085a1a 100644
--- a/src/backend/access/transam/multixact.c
+++ b/src/backend/access/transam/multixact.c
@@ -1140,7 +1140,9 @@ GetNewMultiXactId(int nmembers, MultiXactOffset *offset)
 								 nmembers + MULTIXACT_MEMBERS_PER_PAGE * SLRU_PAGES_PER_SEGMENT * OFFSET_WARN_SEGMENTS))
 		ereport(WARNING,
 				(errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
-				 errmsg("database with OID %u must be vacuumed before %d more multixact members are used",
+				 errmsg_plural("database with OID %u must be vacuumed before %d more multixact member is used",
+							   "database with OID %u must be vacuumed before %d more multixact members are used",
+						MultiXactState->offsetStopLimit - nextOffset + nmembers,
 						MultiXactState->oldestMultiXactDB,
 					MultiXactState->offsetStopLimit - nextOffset + nmembers),
 				 errhint("Execute a database-wide VACUUM in that database with reduced vacuum_multixact_freeze_min_age and vacuum_multixact_freeze_table_age settings.")));
diff --git a/src/backend/catalog/dependency.c b/src/backend/catalog/dependency.c
index 90b1cd835f..efca34c66d 100644
--- a/src/backend/catalog/dependency.c
+++ b/src/backend/catalog/dependency.c
@@ -1619,7 +1619,7 @@ find_expr_references_walker(Node *node,
 				case REGROLEOID:
 					ereport(ERROR,
 							(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
-							 errmsg("constant of the type \'regrole\' cannot be used here")));
+							 errmsg("constant of the type \"regrole\" cannot be used here")));
 					break;
 			}
 		}
diff --git a/src/backend/catalog/objectaddress.c b/src/backend/catalog/objectaddress.c
index 052aab1003..fc56f1ec3c 100644
--- a/src/backend/catalog/objectaddress.c
+++ b/src/backend/catalog/objectaddress.c
@@ -1740,7 +1740,7 @@ get_object_address_defacl(List *objname, List *objargs, bool missing_ok)
 			ereport(ERROR,
 					(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
 				  errmsg("unrecognized default ACL object type %c", objtype),
-				 errhint("Valid object types are 'r', 'S', 'f', and 'T'.")));
+				 errhint("Valid object types are \"r\", \"S\", \"f\", and \"T\".")));
 	}
 
 	/*
diff --git a/src/backend/commands/copy.c b/src/backend/commands/copy.c
index f409aa7393..9a52ec6c3f 100644
--- a/src/backend/commands/copy.c
+++ b/src/backend/commands/copy.c
@@ -875,7 +875,7 @@ DoCopy(const CopyStmt *stmt, const char *queryString, uint64 *processed)
 				ereport(ERROR,
 						(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
 				  errmsg("COPY FROM not supported with row level security."),
-						 errhint("Use direct INSERT statements instead.")));
+						 errhint("Use INSERT statements instead.")));
 
 			/* Build target list */
 			cr = makeNode(ColumnRef);
diff --git a/src/backend/commands/matview.c b/src/backend/commands/matview.c
index 5492e5985b..745b76527d 100644
--- a/src/backend/commands/matview.c
+++ b/src/backend/commands/matview.c
@@ -608,7 +608,7 @@ refresh_by_match_merge(Oid matviewOid, Oid tempOid, Oid relowner,
 		 */
 		ereport(ERROR,
 				(errcode(ERRCODE_CARDINALITY_VIOLATION),
-				 errmsg("new data for \"%s\" contains duplicate rows without any null columns",
+				 errmsg("new data for materialized view \"%s\" contains duplicate rows without any null columns",
 						RelationGetRelationName(matviewRel)),
 				 errdetail("Row: %s",
 			SPI_getvalue(SPI_tuptable->vals[0], SPI_tuptable->tupdesc, 1))));
diff --git a/src/backend/commands/tablecmds.c b/src/backend/commands/tablecmds.c
index 76793ef02a..55ab2096cc 100644
--- a/src/backend/commands/tablecmds.c
+++ b/src/backend/commands/tablecmds.c
@@ -9811,7 +9811,7 @@ AlterTableMoveAll(AlterTableMoveAllStmt *stmt)
 			!ConditionalLockRelationOid(relOid, AccessExclusiveLock))
 			ereport(ERROR,
 					(errcode(ERRCODE_OBJECT_IN_USE),
-					 errmsg("aborting because lock on relation \"%s\".\"%s\" is not available",
+					 errmsg("aborting because lock on relation \"%s.%s\" is not available",
 							get_namespace_name(relForm->relnamespace),
 							NameStr(relForm->relname))));
 		else
diff --git a/src/backend/commands/tablespace.c b/src/backend/commands/tablespace.c
index 7588b7ae26..18ae4ab10a 100644
--- a/src/backend/commands/tablespace.c
+++ b/src/backend/commands/tablespace.c
@@ -857,7 +857,7 @@ remove_tablespace_symlink(const char *linkloc)
 			return;
 		ereport(ERROR,
 				(errcode_for_file_access(),
-				 errmsg("could not stat \"%s\": %m", linkloc)));
+				 errmsg("could not stat file \"%s\": %m", linkloc)));
 	}
 
 	if (S_ISDIR(st.st_mode))
diff --git a/src/backend/commands/vacuumlazy.c b/src/backend/commands/vacuumlazy.c
index a01cfb4c04..24298894fa 100644
--- a/src/backend/commands/vacuumlazy.c
+++ b/src/backend/commands/vacuumlazy.c
@@ -1124,9 +1124,13 @@ lazy_scan_heap(Relation onerel, LVRelStats *vacrelstats,
 					 nkeep);
 	appendStringInfo(&buf, _("There were %.0f unused item pointers.\n"),
 					 nunused);
-	appendStringInfo(&buf, _("Skipped %u pages due to buffer pins.\n"),
+	appendStringInfo(&buf, ngettext("Skipped %u page due to buffer pins.\n",
+									"Skipped %u pages due to buffer pins.\n",
+									vacrelstats->pinskipped_pages),
 					 vacrelstats->pinskipped_pages);
-	appendStringInfo(&buf, _("%u pages are entirely empty.\n"),
+	appendStringInfo(&buf, ngettext("%u page is entirely empty.\n",
+									"%u pages are entirely empty.\n",
+									empty_pages),
 					 empty_pages);
 	appendStringInfo(&buf, _("%s."),
 					 pg_rusage_show(&ru0));
diff --git a/src/backend/executor/execMain.c b/src/backend/executor/execMain.c
index a55022e0a8..9f2af6d0ac 100644
--- a/src/backend/executor/execMain.c
+++ b/src/backend/executor/execMain.c
@@ -1832,7 +1832,7 @@ ExecWithCheckOptions(WCOKind kind, ResultRelInfo *resultRelInfo,
 
 					ereport(ERROR,
 							(errcode(ERRCODE_WITH_CHECK_OPTION_VIOLATION),
-					  errmsg("new row violates WITH CHECK OPTION for \"%s\"",
+					  errmsg("new row violates check option for view \"%s\"",
 							 wco->relname),
 							 val_desc ? errdetail("Failing row contains %s.",
 												  val_desc) : 0));
@@ -1842,24 +1842,24 @@ ExecWithCheckOptions(WCOKind kind, ResultRelInfo *resultRelInfo,
 					if (wco->polname != NULL)
 						ereport(ERROR,
 								(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
-							 errmsg("new row violates row level security policy \"%s\" for \"%s\"",
+							 errmsg("new row violates row-level security policy \"%s\" for table \"%s\"",
 									wco->polname, wco->relname)));
 					else
 						ereport(ERROR,
 								(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
-							 errmsg("new row violates row level security policy for \"%s\"",
+							 errmsg("new row violates row-level security policy for table \"%s\"",
 									wco->relname)));
 					break;
 				case WCO_RLS_CONFLICT_CHECK:
 					if (wco->polname != NULL)
 						ereport(ERROR,
 								(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
-							 errmsg("new row violates row level security policy \"%s\" (USING expression) for \"%s\"",
+							 errmsg("new row violates row-level security policy \"%s\" (USING expression) for table \"%s\"",
 									wco->polname, wco->relname)));
 					else
 						ereport(ERROR,
 								(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
-							 errmsg("new row violates row level security policy (USING expression) for \"%s\"",
+							 errmsg("new row violates row-level security policy (USING expression) for table \"%s\"",
 									wco->relname)));
 					break;
 				default:
diff --git a/src/backend/parser/parse_clause.c b/src/backend/parser/parse_clause.c
index 59808568a5..9c2846dc33 100644
--- a/src/backend/parser/parse_clause.c
+++ b/src/backend/parser/parse_clause.c
@@ -2867,7 +2867,7 @@ transformOnConflictArbiter(ParseState *pstate,
 	if (IsCatalogRelation(pstate->p_target_relation))
 		ereport(ERROR,
 				(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
-			  errmsg("ON CONFLICT not supported with system catalog tables"),
+			  errmsg("ON CONFLICT is not supported with system catalog tables"),
 				 parser_errposition(pstate,
 								  exprLocation((Node *) onConflictClause))));
 
@@ -2875,7 +2875,7 @@ transformOnConflictArbiter(ParseState *pstate,
 	if (RelationIsUsedAsCatalogTable(pstate->p_target_relation))
 		ereport(ERROR,
 				(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
-				 errmsg("ON CONFLICT not supported on table \"%s\" used as a catalog table",
+				 errmsg("ON CONFLICT is not supported on table \"%s\" used as a catalog table",
 						RelationGetRelationName(pstate->p_target_relation)),
 				 parser_errposition(pstate,
 								  exprLocation((Node *) onConflictClause))));
diff --git a/src/backend/replication/logical/logicalfuncs.c b/src/backend/replication/logical/logicalfuncs.c
index a354a3f819..012987a972 100644
--- a/src/backend/replication/logical/logicalfuncs.c
+++ b/src/backend/replication/logical/logicalfuncs.c
@@ -403,7 +403,7 @@ pg_logical_slot_get_changes_guts(FunctionCallInfo fcinfo, bool confirm, bool bin
 			ctx->options.output_type !=OUTPUT_PLUGIN_TEXTUAL_OUTPUT)
 			ereport(ERROR,
 					(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
-					 errmsg("logical decoding output plugin \"%s\" produces binary output, but \"%s\" expects textual data",
+					 errmsg("logical decoding output plugin \"%s\" produces binary output, but function \"%s\" expects textual data",
 							NameStr(MyReplicationSlot->data.plugin),
 							format_procedure(fcinfo->flinfo->fn_oid))));
 
diff --git a/src/backend/replication/logical/origin.c b/src/backend/replication/logical/origin.c
index f55641bfb0..8a3fb59e4a 100644
--- a/src/backend/replication/logical/origin.c
+++ b/src/backend/replication/logical/origin.c
@@ -313,7 +313,7 @@ replorigin_create(char *roname)
 	if (tuple == NULL)
 		ereport(ERROR,
 				(errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
-				 errmsg("no free replication origin oid could be found")));
+				 errmsg("could not find free replication origin OID")));
 
 	heap_freetuple(tuple);
 	return roident;
@@ -350,7 +350,7 @@ replorigin_drop(RepOriginId roident)
 			{
 				ereport(ERROR,
 						(errcode(ERRCODE_OBJECT_IN_USE),
-						 errmsg("cannot drop replication origin with oid %d, in use by pid %d",
+						 errmsg("could not drop replication origin with OID %d, in use by PID %d",
 								state->roident,
 								state->acquired_by)));
 			}
@@ -728,7 +728,7 @@ StartupReplicationOrigin(void)
 		if (last_state == max_replication_slots)
 			ereport(PANIC,
 					(errcode(ERRCODE_CONFIGURATION_LIMIT_EXCEEDED),
-					 errmsg("no free replication state could be found, increase max_replication_slots")));
+					 errmsg("could not find free replication state, increase max_replication_slots")));
 
 		/* copy data to shared memory */
 		replication_states[last_state].roident = disk_state.roident;
@@ -746,7 +746,7 @@ StartupReplicationOrigin(void)
 	if (file_crc != crc)
 		ereport(PANIC,
 				(errcode(ERRCODE_CONFIGURATION_LIMIT_EXCEEDED),
-				 errmsg("replication_slot_checkpoint has wrong checksum %u, expected %u",
+				 errmsg("replication slot checkpoint has wrong checksum %u, expected %u",
 						crc, file_crc)));
 
 	CloseTransientFile(fd);
@@ -870,7 +870,7 @@ replorigin_advance(RepOriginId node,
 		{
 			ereport(ERROR,
 					(errcode(ERRCODE_OBJECT_IN_USE),
-					 errmsg("replication origin with oid %d is already active for pid %d",
+					 errmsg("replication origin with OID %d is already active for PID %d",
 							replication_state->roident,
 							replication_state->acquired_by)));
 		}
@@ -881,7 +881,7 @@ replorigin_advance(RepOriginId node,
 	if (replication_state == NULL && free_state == NULL)
 		ereport(ERROR,
 				(errcode(ERRCODE_CONFIGURATION_LIMIT_EXCEEDED),
-				 errmsg("no free replication state slot could be found for replication origin with oid %u",
+				 errmsg("could not find free replication state slot for replication origin with OID %u",
 						node),
 				 errhint("Increase max_replication_slots and try again.")));
 
@@ -1049,7 +1049,7 @@ replorigin_session_setup(RepOriginId node)
 		{
 			ereport(ERROR,
 					(errcode(ERRCODE_OBJECT_IN_USE),
-			 errmsg("replication identifier %d is already active for pid %d",
+			 errmsg("replication identifier %d is already active for PID %d",
 					curstate->roident, curstate->acquired_by)));
 		}
 
@@ -1061,7 +1061,7 @@ replorigin_session_setup(RepOriginId node)
 	if (session_replication_state == NULL && free_slot == -1)
 		ereport(ERROR,
 				(errcode(ERRCODE_CONFIGURATION_LIMIT_EXCEEDED),
-				 errmsg("no free replication state slot could be found for replication origin with oid %u",
+				 errmsg("could not find free replication state slot for replication origin with OID %u",
 						node),
 				 errhint("Increase max_replication_slots and try again.")));
 	else if (session_replication_state == NULL)
diff --git a/src/backend/replication/logical/snapbuild.c b/src/backend/replication/logical/snapbuild.c
index a574cf365a..ccc44faa62 100644
--- a/src/backend/replication/logical/snapbuild.c
+++ b/src/backend/replication/logical/snapbuild.c
@@ -1677,12 +1677,12 @@ SnapBuildRestore(SnapBuild *builder, XLogRecPtr lsn)
 
 	if (ondisk.magic != SNAPBUILD_MAGIC)
 		ereport(ERROR,
-				(errmsg("snapbuild state file \"%s\" has wrong magic %u instead of %u",
+				(errmsg("snapbuild state file \"%s\" has wrong magic number: %u instead of %u",
 						path, ondisk.magic, SNAPBUILD_MAGIC)));
 
 	if (ondisk.version != SNAPBUILD_VERSION)
 		ereport(ERROR,
-				(errmsg("snapbuild state file \"%s\" has unsupported version %u instead of %u",
+				(errmsg("snapbuild state file \"%s\" has unsupported version: %u instead of %u",
 						path, ondisk.version, SNAPBUILD_VERSION)));
 
 	INIT_CRC32C(checksum);
@@ -1738,7 +1738,7 @@ SnapBuildRestore(SnapBuild *builder, XLogRecPtr lsn)
 	if (!EQ_CRC32C(checksum, ondisk.checksum))
 		ereport(ERROR,
 				(errcode_for_file_access(),
-				 errmsg("snapbuild state file %s: checksum mismatch, is %u, should be %u",
+				 errmsg("checksum mismatch for snapbuild state file \"%s\": is %u, should be %u",
 						path, checksum, ondisk.checksum)));
 
 	/*
diff --git a/src/backend/replication/slot.c b/src/backend/replication/slot.c
index 92ec6326de..c39e95767d 100644
--- a/src/backend/replication/slot.c
+++ b/src/backend/replication/slot.c
@@ -344,7 +344,7 @@ ReplicationSlotAcquire(const char *name)
 	if (active_pid != 0)
 		ereport(ERROR,
 				(errcode(ERRCODE_OBJECT_IN_USE),
-			   errmsg("replication slot \"%s\" is already active for pid %d",
+			   errmsg("replication slot \"%s\" is already active for PID %d",
 					  name, active_pid)));
 
 	/* We made this slot active, so it's ours now. */
@@ -1179,7 +1179,7 @@ RestoreSlotFromDisk(const char *name)
 	if (cp.magic != SLOT_MAGIC)
 		ereport(PANIC,
 				(errcode_for_file_access(),
-				 errmsg("replication slot file \"%s\" has wrong magic %u instead of %u",
+				 errmsg("replication slot file \"%s\" has wrong magic number: %u instead of %u",
 						path, cp.magic, SLOT_MAGIC)));
 
 	/* verify version */
@@ -1223,7 +1223,7 @@ RestoreSlotFromDisk(const char *name)
 
 	if (!EQ_CRC32C(checksum, cp.checksum))
 		ereport(PANIC,
-				(errmsg("replication slot file %s: checksum mismatch, is %u, should be %u",
+				(errmsg("checksum mismatch for replication slot file \"%s\": is %u, should be %u",
 						path, checksum, cp.checksum)));
 
 	/*
diff --git a/src/backend/tcop/postgres.c b/src/backend/tcop/postgres.c
index d30fe35c14..cb580dc0a7 100644
--- a/src/backend/tcop/postgres.c
+++ b/src/backend/tcop/postgres.c
@@ -3900,7 +3900,7 @@ PostgresMain(int argc, char *argv[],
 		if (pq_is_reading_msg())
 			ereport(FATAL,
 					(errcode(ERRCODE_PROTOCOL_VIOLATION),
-			errmsg("terminating connection because protocol sync was lost")));
+			errmsg("terminating connection because protocol synchronization was lost")));
 
 		/* Now we can allow interrupts again */
 		RESUME_INTERRUPTS();
diff --git a/src/backend/utils/adt/jsonb.c b/src/backend/utils/adt/jsonb.c
index d7b90b6108..7cbb69faf2 100644
--- a/src/backend/utils/adt/jsonb.c
+++ b/src/backend/utils/adt/jsonb.c
@@ -721,7 +721,7 @@ datum_to_jsonb(Datum val, bool is_null, JsonbInState *result,
 	{
 		ereport(ERROR,
 				(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
-		  errmsg("key value must be scalar, not array, composite or json")));
+		  errmsg("key value must be scalar, not array, composite, or json")));
 	}
 	else
 	{
diff --git a/src/backend/utils/adt/misc.c b/src/backend/utils/adt/misc.c
index c0495d955c..3ef6e43c4d 100644
--- a/src/backend/utils/adt/misc.c
+++ b/src/backend/utils/adt/misc.c
@@ -168,7 +168,7 @@ pg_cancel_backend(PG_FUNCTION_ARGS)
 	if (r == SIGNAL_BACKEND_NOPERMISSION)
 		ereport(ERROR,
 				(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
-				 (errmsg("must be a member of the role whose query is being cancelled"))));
+				 (errmsg("must be a member of the role whose query is being canceled"))));
 
 	PG_RETURN_BOOL(r == SIGNAL_BACKEND_SUCCESS);
 }
diff --git a/src/bin/psql/command.c b/src/bin/psql/command.c
index 5163c765ba..50d3ff5174 100644
--- a/src/bin/psql/command.c
+++ b/src/bin/psql/command.c
@@ -2805,7 +2805,9 @@ printPsetInfo(const char *param, struct printQueryOpt *popt)
 	/* show minimum lines for pager use */
 	else if (strcmp(param, "pager_min_lines") == 0)
 	{
-		printf(_("Pager won't be used for less than %d lines\n"),
+		printf(ngettext("Pager won't be used for less than %d line.\n",
+						"Pager won't be used for less than %d lines.\n",
+						popt->topt.pager_min_lines),
 			   popt->topt.pager_min_lines);
 	}
 
diff --git a/src/test/modules/test_rls_hooks/expected/test_rls_hooks.out b/src/test/modules/test_rls_hooks/expected/test_rls_hooks.out
index 88854641be..159b6043f0 100644
--- a/src/test/modules/test_rls_hooks/expected/test_rls_hooks.out
+++ b/src/test/modules/test_rls_hooks/expected/test_rls_hooks.out
@@ -62,7 +62,7 @@ SELECT * FROM rls_test_permissive;
 INSERT INTO rls_test_permissive VALUES ('r1','s1',10);
 -- failure
 INSERT INTO rls_test_permissive VALUES ('r4','s4',10);
-ERROR:  new row violates row level security policy for "rls_test_permissive"
+ERROR:  new row violates row-level security policy for table "rls_test_permissive"
 SET ROLE s1;
 -- With only the hook's policies, restrictive
 -- hook's policy is current_user = supervisor
@@ -83,7 +83,7 @@ SELECT * FROM rls_test_restrictive;
 INSERT INTO rls_test_restrictive VALUES ('r1','s1',10);
 -- failure
 INSERT INTO rls_test_restrictive VALUES ('r4','s4',10);
-ERROR:  new row violates row level security policy "extension policy" for "rls_test_restrictive"
+ERROR:  new row violates row-level security policy "extension policy" for table "rls_test_restrictive"
 SET ROLE s1;
 -- With only the hook's policies, both
 -- permissive hook's policy is current_user = username
@@ -103,13 +103,13 @@ SELECT * FROM rls_test_both;
 
 -- failure
 INSERT INTO rls_test_both VALUES ('r1','s1',10);
-ERROR:  new row violates row level security policy for "rls_test_both"
+ERROR:  new row violates row-level security policy for table "rls_test_both"
 -- failure
 INSERT INTO rls_test_both VALUES ('r4','s1',10);
-ERROR:  new row violates row level security policy for "rls_test_both"
+ERROR:  new row violates row-level security policy for table "rls_test_both"
 -- failure
 INSERT INTO rls_test_both VALUES ('r4','s4',10);
-ERROR:  new row violates row level security policy for "rls_test_both"
+ERROR:  new row violates row-level security policy for table "rls_test_both"
 RESET ROLE;
 -- Create "internal" policies, to check that the policies from
 -- the hooks are combined correctly.
@@ -141,7 +141,7 @@ INSERT INTO rls_test_permissive VALUES ('r1','s1',7);
 INSERT INTO rls_test_permissive VALUES ('r3','s3',10);
 -- failure
 INSERT INTO rls_test_permissive VALUES ('r4','s4',7);
-ERROR:  new row violates row level security policy for "rls_test_permissive"
+ERROR:  new row violates row-level security policy for table "rls_test_permissive"
 SET ROLE s1;
 -- With both internal and hook policies, restrictive
 EXPLAIN (costs off) SELECT * FROM rls_test_restrictive;
@@ -163,13 +163,13 @@ SELECT * FROM rls_test_restrictive;
 INSERT INTO rls_test_restrictive VALUES ('r1','s1',8);
 -- failure
 INSERT INTO rls_test_restrictive VALUES ('r3','s3',10);
-ERROR:  new row violates row level security policy "extension policy" for "rls_test_restrictive"
+ERROR:  new row violates row-level security policy "extension policy" for table "rls_test_restrictive"
 -- failure
 INSERT INTO rls_test_restrictive VALUES ('r1','s1',7);
-ERROR:  new row violates row level security policy for "rls_test_restrictive"
+ERROR:  new row violates row-level security policy for table "rls_test_restrictive"
 -- failure
 INSERT INTO rls_test_restrictive VALUES ('r4','s4',7);
-ERROR:  new row violates row level security policy for "rls_test_restrictive"
+ERROR:  new row violates row-level security policy for table "rls_test_restrictive"
 -- With both internal and hook policies, both permissive
 -- and restrictive hook policies
 EXPLAIN (costs off) SELECT * FROM rls_test_both;
@@ -190,13 +190,13 @@ SELECT * FROM rls_test_both;
 INSERT INTO rls_test_both VALUES ('r1','s1',8);
 -- failure
 INSERT INTO rls_test_both VALUES ('r3','s3',10);
-ERROR:  new row violates row level security policy "extension policy" for "rls_test_both"
+ERROR:  new row violates row-level security policy "extension policy" for table "rls_test_both"
 -- failure
 INSERT INTO rls_test_both VALUES ('r1','s1',7);
-ERROR:  new row violates row level security policy for "rls_test_both"
+ERROR:  new row violates row-level security policy for table "rls_test_both"
 -- failure
 INSERT INTO rls_test_both VALUES ('r4','s4',7);
-ERROR:  new row violates row level security policy for "rls_test_both"
+ERROR:  new row violates row-level security policy for table "rls_test_both"
 RESET ROLE;
 DROP TABLE rls_test_restrictive;
 DROP TABLE rls_test_permissive;
diff --git a/src/test/regress/expected/jsonb.out b/src/test/regress/expected/jsonb.out
index bd06a0e49a..58c2ab0273 100644
--- a/src/test/regress/expected/jsonb.out
+++ b/src/test/regress/expected/jsonb.out
@@ -1375,11 +1375,11 @@ SELECT jsonb_build_object(1,2);
 SELECT jsonb_build_object(null,2);
 ERROR:  arg 1: key cannot be null
 SELECT jsonb_build_object(r,2) FROM (SELECT 1 AS a, 2 AS b) r;
-ERROR:  key value must be scalar, not array, composite or json
+ERROR:  key value must be scalar, not array, composite, or json
 SELECT jsonb_build_object(json '{"a":1,"b":2}', 3);
-ERROR:  key value must be scalar, not array, composite or json
+ERROR:  key value must be scalar, not array, composite, or json
 SELECT jsonb_build_object('{1,2,3}'::int[], 3);
-ERROR:  key value must be scalar, not array, composite or json
+ERROR:  key value must be scalar, not array, composite, or json
 -- handling of NULL values
 SELECT jsonb_object_agg(1, NULL::jsonb);
  jsonb_object_agg 
diff --git a/src/test/regress/expected/matview.out b/src/test/regress/expected/matview.out
index eb13ea75fb..91c0957f0c 100644
--- a/src/test/regress/expected/matview.out
+++ b/src/test/regress/expected/matview.out
@@ -411,7 +411,7 @@ REFRESH MATERIALIZED VIEW mv;
 ERROR:  could not create unique index "mv_a_idx"
 DETAIL:  Key (a)=(1) is duplicated.
 REFRESH MATERIALIZED VIEW CONCURRENTLY mv;
-ERROR:  new data for "mv" contains duplicate rows without any null columns
+ERROR:  new data for materialized view "mv" contains duplicate rows without any null columns
 DETAIL:  Row: (1,10)
 DROP TABLE foo CASCADE;
 NOTICE:  drop cascades to materialized view mv
diff --git a/src/test/regress/expected/rowsecurity.out b/src/test/regress/expected/rowsecurity.out
index c8444999e1..1d8609f352 100644
--- a/src/test/regress/expected/rowsecurity.out
+++ b/src/test/regress/expected/rowsecurity.out
@@ -330,9 +330,9 @@ SELECT * FROM document WHERE did = 8; -- and confirm we can't see it
 
 -- RLS policies are checked before constraints
 INSERT INTO document VALUES (8, 44, 1, 'rls_regress_user2', 'my third manga'); -- Should fail with RLS check violation, not duplicate key violation
-ERROR:  new row violates row level security policy for "document"
+ERROR:  new row violates row-level security policy for table "document"
 UPDATE document SET did = 8, dauthor = 'rls_regress_user2' WHERE did = 5; -- Should fail with RLS check violation, not duplicate key violation
-ERROR:  new row violates row level security policy for "document"
+ERROR:  new row violates row-level security policy for table "document"
 -- database superuser does bypass RLS policy when enabled
 RESET SESSION AUTHORIZATION;
 SET row_security TO ON;
@@ -1453,9 +1453,9 @@ NOTICE:  f_leak => d3d9446802a44259755d38e6d163e820
 (5 rows)
 
 INSERT INTO bv1 VALUES (-1, 'xxx'); -- should fail view WCO
-ERROR:  new row violates row level security policy for "b1"
+ERROR:  new row violates row-level security policy for table "b1"
 INSERT INTO bv1 VALUES (11, 'xxx'); -- should fail RLS check
-ERROR:  new row violates row level security policy for "b1"
+ERROR:  new row violates row-level security policy for table "b1"
 INSERT INTO bv1 VALUES (12, 'xxx'); -- ok
 EXPLAIN (COSTS OFF) UPDATE bv1 SET b = 'yyy' WHERE a = 4 AND f_leak(b);
                                 QUERY PLAN                                 
@@ -1534,7 +1534,7 @@ SELECT * FROM document WHERE did = 2;
 -- alternative UPDATE path happens to be taken):
 INSERT INTO document VALUES (2, (SELECT cid from category WHERE cname = 'novel'), 1, 'rls_regress_user2', 'my first novel')
     ON CONFLICT (did) DO UPDATE SET dtitle = EXCLUDED.dtitle, dauthor = EXCLUDED.dauthor;
-ERROR:  new row violates row level security policy for "document"
+ERROR:  new row violates row-level security policy for table "document"
 -- Violates USING qual for UPDATE policy p3.
 --
 -- UPDATE path is taken, but UPDATE fails purely because *existing* row to be
@@ -1543,7 +1543,7 @@ ERROR:  new row violates row level security policy for "document"
 INSERT INTO document VALUES (33, 22, 1, 'rls_regress_user1', 'okay science fiction'); -- preparation for next statement
 INSERT INTO document VALUES (33, (SELECT cid from category WHERE cname = 'novel'), 1, 'rls_regress_user1', 'Some novel, replaces sci-fi') -- takes UPDATE path
     ON CONFLICT (did) DO UPDATE SET dtitle = EXCLUDED.dtitle;
-ERROR:  new row violates row level security policy (USING expression) for "document"
+ERROR:  new row violates row-level security policy (USING expression) for table "document"
 -- Fine (we UPDATE, since INSERT WCOs and UPDATE security barrier quals + WCOs
 -- not violated):
 INSERT INTO document VALUES (2, (SELECT cid from category WHERE cname = 'novel'), 1, 'rls_regress_user1', 'my first novel')
@@ -1574,7 +1574,7 @@ INSERT INTO document VALUES (78, (SELECT cid from category WHERE cname = 'novel'
 -- passing quals:
 INSERT INTO document VALUES (78, (SELECT cid from category WHERE cname = 'novel'), 1, 'rls_regress_user1', 'some technology novel')
     ON CONFLICT (did) DO UPDATE SET dtitle = EXCLUDED.dtitle, cid = 33 RETURNING *;
-ERROR:  new row violates row level security policy (USING expression) for "document"
+ERROR:  new row violates row-level security policy (USING expression) for table "document"
 -- Don't fail just because INSERT doesn't satisfy WITH CHECK option that
 -- originated as a barrier/USING() qual from the UPDATE.  Note that the UPDATE
 -- path *isn't* taken, and so UPDATE-related policy does not apply:
@@ -1591,7 +1591,7 @@ INSERT INTO document VALUES (79, (SELECT cid from category WHERE cname = 'techno
 -- irrelevant, in fact.
 INSERT INTO document VALUES (79, (SELECT cid from category WHERE cname = 'technology'), 1, 'rls_regress_user1', 'technology book, can only insert')
     ON CONFLICT (did) DO UPDATE SET dtitle = EXCLUDED.dtitle RETURNING *;
-ERROR:  new row violates row level security policy (USING expression) for "document"
+ERROR:  new row violates row-level security policy (USING expression) for table "document"
 -- Test default USING qual enforced as WCO
 SET SESSION AUTHORIZATION rls_regress_user0;
 DROP POLICY p1 ON document;
@@ -1613,14 +1613,14 @@ SET SESSION AUTHORIZATION rls_regress_user1;
 -- UPDATE to make this fail:
 INSERT INTO document VALUES (79, (SELECT cid from category WHERE cname = 'technology'), 1, 'rls_regress_user1', 'technology book, can only insert')
     ON CONFLICT (did) DO UPDATE SET dtitle = EXCLUDED.dtitle RETURNING *;
-ERROR:  new row violates row level security policy for "document"
+ERROR:  new row violates row-level security policy for table "document"
 -- UPDATE path is taken here.  Existing tuple passes, since it's cid
 -- corresponds to "novel", but default USING qual is enforced against
 -- post-UPDATE tuple too (as always when updating with a policy that lacks an
 -- explicit WCO), and so this fails:
 INSERT INTO document VALUES (2, (SELECT cid from category WHERE cname = 'technology'), 1, 'rls_regress_user1', 'my first novel')
     ON CONFLICT (did) DO UPDATE SET cid = EXCLUDED.cid, dtitle = EXCLUDED.dtitle RETURNING *;
-ERROR:  new row violates row level security policy for "document"
+ERROR:  new row violates row-level security policy for table "document"
 SET SESSION AUTHORIZATION rls_regress_user0;
 DROP POLICY p3_with_default ON document;
 --
@@ -1634,16 +1634,16 @@ SET SESSION AUTHORIZATION rls_regress_user1;
 -- Fails, since ALL WCO is enforced in insert path:
 INSERT INTO document VALUES (80, (SELECT cid from category WHERE cname = 'novel'), 1, 'rls_regress_user2', 'my first novel')
     ON CONFLICT (did) DO UPDATE SET dtitle = EXCLUDED.dtitle, cid = 33;
-ERROR:  new row violates row level security policy for "document"
+ERROR:  new row violates row-level security policy for table "document"
 -- Fails, since ALL policy USING qual is enforced (existing, target tuple is in
 -- violation, since it has the "manga" cid):
 INSERT INTO document VALUES (4, (SELECT cid from category WHERE cname = 'novel'), 1, 'rls_regress_user1', 'my first novel')
     ON CONFLICT (did) DO UPDATE SET dtitle = EXCLUDED.dtitle;
-ERROR:  new row violates row level security policy (USING expression) for "document"
+ERROR:  new row violates row-level security policy (USING expression) for table "document"
 -- Fails, since ALL WCO are enforced:
 INSERT INTO document VALUES (1, (SELECT cid from category WHERE cname = 'novel'), 1, 'rls_regress_user1', 'my first novel')
     ON CONFLICT (did) DO UPDATE SET dauthor = 'rls_regress_user2';
-ERROR:  new row violates row level security policy for "document"
+ERROR:  new row violates row-level security policy for table "document"
 --
 -- ROLE/GROUP
 --
@@ -2249,7 +2249,7 @@ EXPLAIN (COSTS OFF) WITH cte1 AS (SELECT * FROM t1 WHERE f_leak(b)) SELECT * FRO
 (6 rows)
 
 WITH cte1 AS (UPDATE t1 SET a = a + 1 RETURNING *) SELECT * FROM cte1; --fail
-ERROR:  new row violates row level security policy for "t1"
+ERROR:  new row violates row-level security policy for table "t1"
 WITH cte1 AS (UPDATE t1 SET a = a RETURNING *) SELECT * FROM cte1; --ok
  a  |                b                 
 ----+----------------------------------
@@ -2267,7 +2267,7 @@ WITH cte1 AS (UPDATE t1 SET a = a RETURNING *) SELECT * FROM cte1; --ok
 (11 rows)
 
 WITH cte1 AS (INSERT INTO t1 VALUES (21, 'Fail') RETURNING *) SELECT * FROM cte1; --fail
-ERROR:  new row violates row level security policy for "t1"
+ERROR:  new row violates row-level security policy for table "t1"
 WITH cte1 AS (INSERT INTO t1 VALUES (20, 'Success') RETURNING *) SELECT * FROM cte1; --ok
  a  |    b    
 ----+---------
@@ -2675,7 +2675,7 @@ ERROR:  insufficient privilege to bypass row security.
 SET row_security TO ON;
 COPY copy_t FROM STDIN; --fail - COPY FROM not supported by RLS.
 ERROR:  COPY FROM not supported with row level security.
-HINT:  Use direct INSERT statements instead.
+HINT:  Use INSERT statements instead.
 -- Check COPY FROM as user with permissions and BYPASSRLS
 SET SESSION AUTHORIZATION rls_regress_exempt_user;
 SET row_security TO ON;
@@ -2978,7 +2978,7 @@ SELECT * FROM r2;
 
 -- r2 is read-only
 INSERT INTO r2 VALUES (2); -- Not allowed
-ERROR:  new row violates row level security policy for "r2"
+ERROR:  new row violates row-level security policy for table "r2"
 UPDATE r2 SET a = 2 RETURNING *; -- Updates nothing
  a 
 ---
@@ -3047,7 +3047,7 @@ TABLE r1;
 
 -- RLS error
 INSERT INTO r1 VALUES (1);
-ERROR:  new row violates row level security policy for "r1"
+ERROR:  new row violates row-level security policy for table "r1"
 -- No error (unable to see any rows to update)
 UPDATE r1 SET a = 1;
 TABLE r1;
@@ -3208,7 +3208,7 @@ TABLE r1;
 SET row_security = on;
 -- Error
 INSERT INTO r1 VALUES (10), (20) RETURNING *;
-ERROR:  new row violates row level security policy for "r1"
+ERROR:  new row violates row-level security policy for table "r1"
 DROP TABLE r1;
 --
 -- Test UPDATE+RETURNING applies SELECT policies as
@@ -3244,7 +3244,7 @@ TABLE r1;
 SET row_security = on;
 -- Error
 UPDATE r1 SET a = 30 RETURNING *;
-ERROR:  new row violates row level security policy for "r1"
+ERROR:  new row violates row-level security policy for table "r1"
 DROP TABLE r1;
 --
 -- Clean up objects
diff --git a/src/test/regress/expected/updatable_views.out b/src/test/regress/expected/updatable_views.out
index 7eb92612d7..8e5463a28d 100644
--- a/src/test/regress/expected/updatable_views.out
+++ b/src/test/regress/expected/updatable_views.out
@@ -1456,18 +1456,18 @@ SELECT * FROM information_schema.views WHERE table_name = 'rw_view1';
 
 INSERT INTO rw_view1 VALUES(3,4); -- ok
 INSERT INTO rw_view1 VALUES(4,3); -- should fail
-ERROR:  new row violates WITH CHECK OPTION for "rw_view1"
+ERROR:  new row violates check option for view "rw_view1"
 DETAIL:  Failing row contains (4, 3).
 INSERT INTO rw_view1 VALUES(5,null); -- should fail
-ERROR:  new row violates WITH CHECK OPTION for "rw_view1"
+ERROR:  new row violates check option for view "rw_view1"
 DETAIL:  Failing row contains (5, null).
 UPDATE rw_view1 SET b = 5 WHERE a = 3; -- ok
 UPDATE rw_view1 SET b = -5 WHERE a = 3; -- should fail
-ERROR:  new row violates WITH CHECK OPTION for "rw_view1"
+ERROR:  new row violates check option for view "rw_view1"
 DETAIL:  Failing row contains (3, -5).
 INSERT INTO rw_view1(a) VALUES (9); -- ok
 INSERT INTO rw_view1(a) VALUES (10); -- should fail
-ERROR:  new row violates WITH CHECK OPTION for "rw_view1"
+ERROR:  new row violates check option for view "rw_view1"
 DETAIL:  Failing row contains (10, 10).
 SELECT * FROM base_tbl;
  a | b  
@@ -1506,11 +1506,11 @@ SELECT * FROM information_schema.views WHERE table_name = 'rw_view2';
 (1 row)
 
 INSERT INTO rw_view2 VALUES (-5); -- should fail
-ERROR:  new row violates WITH CHECK OPTION for "rw_view1"
+ERROR:  new row violates check option for view "rw_view1"
 DETAIL:  Failing row contains (-5).
 INSERT INTO rw_view2 VALUES (5); -- ok
 INSERT INTO rw_view2 VALUES (15); -- should fail
-ERROR:  new row violates WITH CHECK OPTION for "rw_view2"
+ERROR:  new row violates check option for view "rw_view2"
 DETAIL:  Failing row contains (15).
 SELECT * FROM base_tbl;
  a 
@@ -1519,10 +1519,10 @@ SELECT * FROM base_tbl;
 (1 row)
 
 UPDATE rw_view2 SET a = a - 10; -- should fail
-ERROR:  new row violates WITH CHECK OPTION for "rw_view1"
+ERROR:  new row violates check option for view "rw_view1"
 DETAIL:  Failing row contains (-5).
 UPDATE rw_view2 SET a = a + 10; -- should fail
-ERROR:  new row violates WITH CHECK OPTION for "rw_view2"
+ERROR:  new row violates check option for view "rw_view2"
 DETAIL:  Failing row contains (15).
 CREATE OR REPLACE VIEW rw_view2 AS SELECT * FROM rw_view1 WHERE a < 10
   WITH LOCAL CHECK OPTION;
@@ -1547,7 +1547,7 @@ SELECT * FROM information_schema.views WHERE table_name = 'rw_view2';
 
 INSERT INTO rw_view2 VALUES (-10); -- ok, but not in view
 INSERT INTO rw_view2 VALUES (20); -- should fail
-ERROR:  new row violates WITH CHECK OPTION for "rw_view2"
+ERROR:  new row violates check option for view "rw_view2"
 DETAIL:  Failing row contains (20).
 SELECT * FROM base_tbl;
   a  
@@ -1561,10 +1561,10 @@ ERROR:  invalid value for "check_option" option
 DETAIL:  Valid values are "local" and "cascaded".
 ALTER VIEW rw_view1 SET (check_option=local);
 INSERT INTO rw_view2 VALUES (-20); -- should fail
-ERROR:  new row violates WITH CHECK OPTION for "rw_view1"
+ERROR:  new row violates check option for view "rw_view1"
 DETAIL:  Failing row contains (-20).
 INSERT INTO rw_view2 VALUES (30); -- should fail
-ERROR:  new row violates WITH CHECK OPTION for "rw_view2"
+ERROR:  new row violates check option for view "rw_view2"
 DETAIL:  Failing row contains (30).
 ALTER VIEW rw_view2 RESET (check_option);
 \d+ rw_view2
@@ -1620,7 +1620,7 @@ INSERT INTO rw_view1 VALUES (1); -- ok
 INSERT INTO rw_view2 VALUES (-2); -- ok, but not in view
 INSERT INTO rw_view2 VALUES (2); -- ok
 INSERT INTO rw_view3 VALUES (-3); -- should fail
-ERROR:  new row violates WITH CHECK OPTION for "rw_view2"
+ERROR:  new row violates check option for view "rw_view2"
 DETAIL:  Failing row contains (-3).
 INSERT INTO rw_view3 VALUES (3); -- ok
 DROP TABLE base_tbl CASCADE;
@@ -1634,16 +1634,16 @@ CREATE VIEW rw_view1 AS SELECT * FROM base_tbl WHERE a = ANY (b)
   WITH CHECK OPTION;
 INSERT INTO rw_view1 VALUES (1, ARRAY[1,2,3]); -- ok
 INSERT INTO rw_view1 VALUES (10, ARRAY[4,5]); -- should fail
-ERROR:  new row violates WITH CHECK OPTION for "rw_view1"
+ERROR:  new row violates check option for view "rw_view1"
 DETAIL:  Failing row contains (10, {4,5}).
 UPDATE rw_view1 SET b[2] = -b[2] WHERE a = 1; -- ok
 UPDATE rw_view1 SET b[1] = -b[1] WHERE a = 1; -- should fail
-ERROR:  new row violates WITH CHECK OPTION for "rw_view1"
+ERROR:  new row violates check option for view "rw_view1"
 DETAIL:  Failing row contains (1, {-1,-2,3}).
 PREPARE ins(int, int[]) AS INSERT INTO rw_view1 VALUES($1, $2);
 EXECUTE ins(2, ARRAY[1,2,3]); -- ok
 EXECUTE ins(10, ARRAY[4,5]); -- should fail
-ERROR:  new row violates WITH CHECK OPTION for "rw_view1"
+ERROR:  new row violates check option for view "rw_view1"
 DETAIL:  Failing row contains (10, {4,5}).
 DEALLOCATE PREPARE ins;
 DROP TABLE base_tbl CASCADE;
@@ -1658,11 +1658,11 @@ CREATE VIEW rw_view1 AS
   WITH CHECK OPTION;
 INSERT INTO rw_view1 VALUES (5); -- ok
 INSERT INTO rw_view1 VALUES (15); -- should fail
-ERROR:  new row violates WITH CHECK OPTION for "rw_view1"
+ERROR:  new row violates check option for view "rw_view1"
 DETAIL:  Failing row contains (15).
 UPDATE rw_view1 SET a = a + 5; -- ok
 UPDATE rw_view1 SET a = a + 5; -- should fail
-ERROR:  new row violates WITH CHECK OPTION for "rw_view1"
+ERROR:  new row violates check option for view "rw_view1"
 DETAIL:  Failing row contains (15).
 EXPLAIN (costs off) INSERT INTO rw_view1 VALUES (5);
                           QUERY PLAN                           
@@ -1710,10 +1710,10 @@ CREATE TRIGGER base_tbl_trig BEFORE INSERT OR UPDATE ON base_tbl
 CREATE VIEW rw_view1 AS SELECT * FROM base_tbl WHERE a < b WITH CHECK OPTION;
 INSERT INTO rw_view1 VALUES (5,0); -- ok
 INSERT INTO rw_view1 VALUES (15, 20); -- should fail
-ERROR:  new row violates WITH CHECK OPTION for "rw_view1"
+ERROR:  new row violates check option for view "rw_view1"
 DETAIL:  Failing row contains (15, 10).
 UPDATE rw_view1 SET a = 20, b = 30; -- should fail
-ERROR:  new row violates WITH CHECK OPTION for "rw_view1"
+ERROR:  new row violates check option for view "rw_view1"
 DETAIL:  Failing row contains (20, 10).
 DROP TABLE base_tbl CASCADE;
 NOTICE:  drop cascades to view rw_view1
@@ -1744,12 +1744,12 @@ CREATE TRIGGER rw_view1_trig
 CREATE VIEW rw_view2 AS
   SELECT * FROM rw_view1 WHERE a > 0 WITH LOCAL CHECK OPTION;
 INSERT INTO rw_view2 VALUES (-5); -- should fail
-ERROR:  new row violates WITH CHECK OPTION for "rw_view2"
+ERROR:  new row violates check option for view "rw_view2"
 DETAIL:  Failing row contains (-5).
 INSERT INTO rw_view2 VALUES (5); -- ok
 INSERT INTO rw_view2 VALUES (50); -- ok, but not in view
 UPDATE rw_view2 SET a = a - 10; -- should fail
-ERROR:  new row violates WITH CHECK OPTION for "rw_view2"
+ERROR:  new row violates check option for view "rw_view2"
 DETAIL:  Failing row contains (-5).
 SELECT * FROM base_tbl;
  a  | b