diff --git a/pkg/ccl/backupccl/restore_job.go b/pkg/ccl/backupccl/restore_job.go
index 25437edb1445..03619b9fb8f5 100644
--- a/pkg/ccl/backupccl/restore_job.go
+++ b/pkg/ccl/backupccl/restore_job.go
@@ -2683,13 +2683,11 @@ func setGCTTLForDroppingTable(
 		return err
 	}
 
-	schemaDesc, err := descsCol.GetImmutableSchemaByID(ctx, txn, tableToDrop.GetParentSchemaID(),
-		tree.SchemaLookupFlags{
-			Required:       true,
-			IncludeDropped: true,
-			IncludeOffline: true,
-			AvoidLeased:    true,
-		})
+	schemaDesc, err := descsCol.ByID(txn).WithFlags(tree.SchemaLookupFlags{
+		IncludeDropped: true,
+		IncludeOffline: true,
+		AvoidLeased:    true,
+	}).Immutable().Schema(ctx, tableToDrop.GetParentSchemaID())
 	if err != nil {
 		return err
 	}
diff --git a/pkg/ccl/backupccl/restore_planning.go b/pkg/ccl/backupccl/restore_planning.go
index 692e8ae8ef8d..2b39b4944d7f 100644
--- a/pkg/ccl/backupccl/restore_planning.go
+++ b/pkg/ccl/backupccl/restore_planning.go
@@ -332,11 +332,11 @@ func allocateDescriptorRewrites(
 				} else {
 					// If we found an existing schema, then we need to remap all references
 					// to this schema to the existing one.
-					desc, err := col.GetImmutableSchemaByID(ctx, txn, id, tree.SchemaLookupFlags{
+					desc, err := col.ByID(txn).WithFlags(tree.SchemaLookupFlags{
 						AvoidLeased:    true,
 						IncludeDropped: true,
 						IncludeOffline: true,
-					})
+					}).Immutable().Schema(ctx, id)
 					if err != nil {
 						return err
 					}
diff --git a/pkg/ccl/changefeedccl/changefeed_stmt.go b/pkg/ccl/changefeedccl/changefeed_stmt.go
index fd8c97ca3ad7..a18027697305 100644
--- a/pkg/ccl/changefeedccl/changefeed_stmt.go
+++ b/pkg/ccl/changefeedccl/changefeed_stmt.go
@@ -1186,7 +1186,7 @@ func getQualifiedTableNameObj(
 	if err != nil {
 		return tree.TableName{}, err
 	}
-	sc, err := col.GetImmutableSchemaByID(ctx, txn, desc.GetParentSchemaID(), flags)
+	sc, err := col.ByID(txn).WithFlags(flags).Immutable().Schema(ctx, desc.GetParentSchemaID())
 	if err != nil {
 		return tree.TableName{}, err
 	}
diff --git a/pkg/scheduledjobs/schedulebase/util.go b/pkg/scheduledjobs/schedulebase/util.go
index d0eb93aaf5a7..436673b5c293 100644
--- a/pkg/scheduledjobs/schedulebase/util.go
+++ b/pkg/scheduledjobs/schedulebase/util.go
@@ -197,8 +197,7 @@ func FullyQualifyTables(
 				}
 
 				// Resolve the schema.
-				schemaDesc, err := col.GetImmutableSchemaByID(ctx, txn, tableDesc.GetParentSchemaID(),
-					tree.SchemaLookupFlags{Required: true})
+				schemaDesc, err := col.ByID(txn).WithFlags(tree.SchemaLookupFlags{}).Immutable().Schema(ctx, tableDesc.GetParentSchemaID())
 				if err != nil {
 					return err
 				}
diff --git a/pkg/server/status.go b/pkg/server/status.go
index 953bc263aa39..9096a057d4f3 100644
--- a/pkg/server/status.go
+++ b/pkg/server/status.go
@@ -2497,7 +2497,7 @@ func (s *statusServer) HotRangesV2(
 									dbName = dbDesc.GetName()
 								}
 
-								if schemaDesc, err := col.GetImmutableSchemaByID(ctx, txn, desc.GetParentSchemaID(), commonLookupFlags); err != nil {
+								if schemaDesc, err := col.ByID(txn).WithFlags(commonLookupFlags).Immutable().Schema(ctx, desc.GetParentSchemaID()); err != nil {
 									log.Warningf(ctx, "cannot get schema name for range descriptor: %s: %v", r.Desc, err)
 								} else {
 									schemaName = schemaDesc.GetName()
diff --git a/pkg/sql/authorization.go b/pkg/sql/authorization.go
index 8be56bdc9b77..20ac772d84e2 100644
--- a/pkg/sql/authorization.go
+++ b/pkg/sql/authorization.go
@@ -745,8 +745,7 @@ func (p *planner) canCreateOnSchema(
 	user username.SQLUsername,
 	checkPublicSchema shouldCheckPublicSchema,
 ) error {
-	scDesc, err := p.Descriptors().GetImmutableSchemaByID(
-		ctx, p.Txn(), schemaID, tree.SchemaLookupFlags{Required: true})
+	scDesc, err := p.Descriptors().ByID(p.Txn()).WithFlags(tree.SchemaLookupFlags{}).Immutable().Schema(ctx, schemaID)
 	if err != nil {
 		return err
 	}
@@ -850,9 +849,7 @@ func (p *planner) HasOwnershipOnSchema(
 		// Only the node user has ownership over the system database.
 		return p.User().IsNodeUser(), nil
 	}
-	scDesc, err := p.Descriptors().GetImmutableSchemaByID(
-		ctx, p.Txn(), schemaID, tree.SchemaLookupFlags{Required: true},
-	)
+	scDesc, err := p.Descriptors().ByID(p.Txn()).WithFlags(tree.SchemaLookupFlags{}).Immutable().Schema(ctx, schemaID)
 	if err != nil {
 		return false, err
 	}
diff --git a/pkg/sql/catalog/descs/schema.go b/pkg/sql/catalog/descs/schema.go
index 29b14ece45b6..ec450a70ca3e 100644
--- a/pkg/sql/catalog/descs/schema.go
+++ b/pkg/sql/catalog/descs/schema.go
@@ -53,16 +53,6 @@ func (tc *Collection) GetImmutableSchemaByName(
 	return tc.ByName(txn).WithFlags(flags).Immutable().Schema(ctx, db, scName)
 }
 
-// GetImmutableSchemaByID returns a ResolvedSchema wrapping an immutable
-// descriptor, if applicable. RequireMutable is ignored.
-// Required is ignored, and an error is always returned if no descriptor with
-// the ID exists.
-func (tc *Collection) GetImmutableSchemaByID(
-	ctx context.Context, txn *kv.Txn, schemaID descpb.ID, flags tree.SchemaLookupFlags,
-) (catalog.SchemaDescriptor, error) {
-	return tc.ByID(txn).WithFlags(flags).Immutable().Schema(ctx, schemaID)
-}
-
 // GetMutableSchemaByID returns a mutable schema descriptor with the given
 // schema ID. An error is always returned if the descriptor is not physical.
 func (tc *Collection) GetMutableSchemaByID(
diff --git a/pkg/sql/catalog/ingesting/privileges.go b/pkg/sql/catalog/ingesting/privileges.go
index 60de80fc66da..1fb9afe8c731 100644
--- a/pkg/sql/catalog/ingesting/privileges.go
+++ b/pkg/sql/catalog/ingesting/privileges.go
@@ -145,11 +145,11 @@ func getIngestingPrivilegesForTableOrSchema(
 			} else {
 				// If we are restoring into an existing schema, resolve it, and fetch
 				// its default privileges.
-				parentSchema, err := descsCol.GetImmutableSchemaByID(ctx, txn, desc.GetParentSchemaID(), tree.SchemaLookupFlags{
+				parentSchema, err := descsCol.ByID(txn).WithFlags(tree.SchemaLookupFlags{
 					AvoidLeased:    true,
 					IncludeDropped: true,
 					IncludeOffline: true,
-				})
+				}).Immutable().Schema(ctx, desc.GetParentSchemaID())
 				if err != nil {
 					return nil,
 						errors.Wrapf(err, "failed to lookup parent schema %d", errors.Safe(desc.GetParentSchemaID()))
diff --git a/pkg/sql/crdb_internal.go b/pkg/sql/crdb_internal.go
index 3979a731294e..5fb737313578 100644
--- a/pkg/sql/crdb_internal.go
+++ b/pkg/sql/crdb_internal.go
@@ -7097,7 +7097,7 @@ func convertContentionEventsToJSON(
 			return nil, err
 		}
 
-		schemaDesc, err := desc.GetImmutableSchemaByID(ctx, p.txn, tableDesc.GetParentSchemaID(), tree.SchemaLookupFlags{})
+		schemaDesc, err := desc.ByID(p.txn).WithFlags(tree.SchemaLookupFlags{}).Immutable().Schema(ctx, tableDesc.GetParentSchemaID())
 		if err != nil {
 			return nil, err
 		}
diff --git a/pkg/sql/create_schema.go b/pkg/sql/create_schema.go
index 74fb13df2096..19543c81ec47 100644
--- a/pkg/sql/create_schema.go
+++ b/pkg/sql/create_schema.go
@@ -82,12 +82,11 @@ func CreateUserDefinedSchemaDescriptor(
 			// and can't be in a dropping state.
 			if schemaID != descpb.InvalidID {
 				// Check if the object already exists in a dropped state
-				sc, err := descriptors.GetImmutableSchemaByID(ctx, txn, schemaID, tree.SchemaLookupFlags{
-					Required:       true,
+				sc, err := descriptors.ByID(txn).WithFlags(tree.SchemaLookupFlags{
 					AvoidLeased:    true,
 					IncludeOffline: true,
 					IncludeDropped: true,
-				})
+				}).Immutable().Schema(ctx, schemaID)
 				if err != nil || sc.SchemaKind() != catalog.SchemaUserDefined {
 					return nil, nil, err
 				}
diff --git a/pkg/sql/importer/import_job.go b/pkg/sql/importer/import_job.go
index 6bca3e35c0fc..5e25e27ed9b3 100644
--- a/pkg/sql/importer/import_job.go
+++ b/pkg/sql/importer/import_job.go
@@ -816,7 +816,7 @@ func getPublicSchemaDescForDatabase(
 		ctx context.Context, txn *kv.Txn, descriptors *descs.Collection,
 	) error {
 		publicSchemaID := db.GetSchemaID(tree.PublicSchema)
-		scDesc, err = descriptors.GetImmutableSchemaByID(ctx, txn, publicSchemaID, tree.SchemaLookupFlags{Required: true})
+		scDesc, err = descriptors.ByID(txn).WithFlags(tree.SchemaLookupFlags{}).Immutable().Schema(ctx, publicSchemaID)
 		return err
 	}); err != nil {
 		return nil, err
diff --git a/pkg/sql/importer/import_stmt_test.go b/pkg/sql/importer/import_stmt_test.go
index e9869a2308eb..4497f083f1fa 100644
--- a/pkg/sql/importer/import_stmt_test.go
+++ b/pkg/sql/importer/import_stmt_test.go
@@ -6418,11 +6418,11 @@ func TestImportPgDumpSchemas(t *testing.T) {
 		for _, schemaID := range schemaIDs {
 			// Expect that the schema descriptor is deleted.
 			if err := sql.TestingDescsTxn(ctx, tc.Server(0), func(ctx context.Context, txn *kv.Txn, col *descs.Collection) error {
-				_, err := col.GetImmutableSchemaByID(ctx, txn, schemaID, tree.CommonLookupFlags{
+				_, err := col.ByID(txn).WithFlags(tree.CommonLookupFlags{
 					AvoidLeased:    true,
 					IncludeDropped: true,
 					IncludeOffline: true,
-				})
+				}).Immutable().Schema(ctx, schemaID)
 				if pgerror.GetPGCode(err) == pgcode.InvalidSchemaName {
 					return nil
 				}
diff --git a/pkg/sql/information_schema.go b/pkg/sql/information_schema.go
index 5c4f7fa75caa..28f8bbadb3f0 100644
--- a/pkg/sql/information_schema.go
+++ b/pkg/sql/information_schema.go
@@ -1673,7 +1673,7 @@ var informationSchemaRoleRoutineGrantsTable = virtualSchemaTable{
 			}
 
 			err := db.ForEachSchema(func(id descpb.ID, name string) error {
-				sc, err := p.Descriptors().GetImmutableSchemaByID(ctx, p.txn, id, tree.SchemaLookupFlags{Required: true})
+				sc, err := p.Descriptors().ByID(p.txn).WithFlags(tree.SchemaLookupFlags{}).Immutable().Schema(ctx, id)
 				if err != nil {
 					return err
 				}
diff --git a/pkg/sql/opt_catalog.go b/pkg/sql/opt_catalog.go
index 5378f3294216..50bb9c7a482e 100644
--- a/pkg/sql/opt_catalog.go
+++ b/pkg/sql/opt_catalog.go
@@ -448,9 +448,7 @@ func (oc *optCatalog) fullyQualifiedNameWithTxn(
 	if scID == keys.PublicSchemaID {
 		scName = tree.PublicSchemaName
 	} else {
-		scDesc, err := oc.planner.Descriptors().GetImmutableSchemaByID(
-			ctx, txn, scID, tree.SchemaLookupFlags{AvoidLeased: true},
-		)
+		scDesc, err := oc.planner.Descriptors().ByID(txn).WithFlags(tree.SchemaLookupFlags{AvoidLeased: true}).Immutable().Schema(ctx, scID)
 		if err != nil {
 			return cat.DataSourceName{}, err
 		}
diff --git a/pkg/sql/pg_catalog.go b/pkg/sql/pg_catalog.go
index de7dcdb7efc7..473d1a4086ef 100644
--- a/pkg/sql/pg_catalog.go
+++ b/pkg/sql/pg_catalog.go
@@ -1076,11 +1076,11 @@ func (r oneAtATimeSchemaResolver) getTableByID(id descpb.ID) (catalog.TableDescr
 }
 
 func (r oneAtATimeSchemaResolver) getSchemaByID(id descpb.ID) (catalog.SchemaDescriptor, error) {
-	return r.p.Descriptors().GetImmutableSchemaByID(r.ctx, r.p.txn, id, tree.SchemaLookupFlags{
+	return r.p.Descriptors().ByID(r.p.txn).WithFlags(tree.SchemaLookupFlags{
 		AvoidLeased:    true,
 		IncludeDropped: true,
 		IncludeOffline: true,
-	})
+	}).Immutable().Schema(r.ctx, id)
 }
 
 // makeAllRelationsVirtualTableWithDescriptorIDIndex creates a virtual table that searches through
@@ -1148,10 +1148,7 @@ func makeAllRelationsVirtualTableWithDescriptorIDIndex(
 					}
 					h := makeOidHasher()
 					scResolver := oneAtATimeSchemaResolver{p: p, ctx: ctx}
-					sc, err := p.Descriptors().GetImmutableSchemaByID(
-						ctx, p.txn, table.GetParentSchemaID(), tree.SchemaLookupFlags{
-							Required: true,
-						})
+					sc, err := p.Descriptors().ByID(p.txn).WithFlags(tree.SchemaLookupFlags{}).Immutable().Schema(ctx, table.GetParentSchemaID())
 					if err != nil {
 						return false, err
 					}
@@ -1611,13 +1608,7 @@ https://www.postgresql.org/docs/9.5/catalog-pg-description.html`,
 				if err != nil {
 					return err
 				}
-				schema, err := p.Descriptors().GetImmutableSchemaByID(
-					ctx,
-					p.txn,
-					tableDesc.GetParentSchemaID(),
-					tree.CommonLookupFlags{
-						Required: true,
-					})
+				schema, err := p.Descriptors().ByID(p.txn).WithFlags(tree.CommonLookupFlags{}).Immutable().Schema(ctx, tableDesc.GetParentSchemaID())
 				if err != nil {
 					return err
 				}
@@ -2110,9 +2101,7 @@ https://www.postgresql.org/docs/9.5/catalog-pg-namespace.html`,
 					if sc, ok := schemadesc.GetVirtualSchemaByID(descpb.ID(ooid)); ok {
 						return sc, true, nil
 					}
-					if sc, err := p.Descriptors().GetImmutableSchemaByID(
-						ctx, p.Txn(), descpb.ID(ooid), tree.SchemaLookupFlags{Required: true},
-					); err == nil {
+					if sc, err := p.Descriptors().ByID(p.Txn()).WithFlags(tree.SchemaLookupFlags{}).Immutable().Schema(ctx, descpb.ID(ooid)); err == nil {
 						return sc, true, nil
 					} else if !sqlerrors.IsUndefinedSchemaError(err) {
 						return nil, false, err
@@ -2610,9 +2599,7 @@ https://www.postgresql.org/docs/9.5/catalog-pg-proc.html`,
 						return false, err
 					}
 
-					scDesc, err := p.Descriptors().GetImmutableSchemaByID(
-						ctx, p.Txn(), descpb.ID(ooid), tree.SchemaLookupFlags{Required: true},
-					)
+					scDesc, err := p.Descriptors().ByID(p.Txn()).WithFlags(tree.SchemaLookupFlags{}).Immutable().Schema(ctx, descpb.ID(ooid))
 					if err != nil {
 						return false, err
 					}
@@ -3218,12 +3205,7 @@ func getSchemaAndTypeByTypeID(
 		return nil, nil, nil
 	}
 
-	sc, err := p.Descriptors().GetImmutableSchemaByID(
-		ctx,
-		p.txn,
-		typDesc.GetParentSchemaID(),
-		tree.SchemaLookupFlags{Required: true},
-	)
+	sc, err := p.Descriptors().ByID(p.txn).WithFlags(tree.SchemaLookupFlags{}).Immutable().Schema(ctx, typDesc.GetParentSchemaID())
 	if err != nil {
 		return nil, nil, err
 	}
diff --git a/pkg/sql/resolver.go b/pkg/sql/resolver.go
index 84a47d9da399..becaf4c57d4b 100644
--- a/pkg/sql/resolver.go
+++ b/pkg/sql/resolver.go
@@ -650,9 +650,7 @@ func (p *planner) getQualifiedTypeName(
 	}
 
 	schemaID := desc.GetParentSchemaID()
-	scDesc, err := p.Descriptors().GetImmutableSchemaByID(
-		ctx, p.txn, schemaID, tree.SchemaLookupFlags{Required: true},
-	)
+	scDesc, err := p.Descriptors().ByID(p.txn).WithFlags(tree.SchemaLookupFlags{}).Immutable().Schema(ctx, schemaID)
 	if err != nil {
 		return nil, err
 	}
diff --git a/pkg/sql/schema_resolver.go b/pkg/sql/schema_resolver.go
index 77d9a0be9288..e28ae3ab724f 100644
--- a/pkg/sql/schema_resolver.go
+++ b/pkg/sql/schema_resolver.go
@@ -256,13 +256,11 @@ func (sr *schemaResolver) getQualifiedTableName(
 	// information from the namespace table.
 	var schemaName tree.Name
 	schemaID := desc.GetParentSchemaID()
-	scDesc, err := sr.descCollection.GetImmutableSchemaByID(ctx, sr.txn, schemaID,
-		tree.SchemaLookupFlags{
-			Required:       true,
-			IncludeOffline: true,
-			IncludeDropped: true,
-			AvoidLeased:    true,
-		})
+	scDesc, err := sr.descCollection.ByID(sr.txn).WithFlags(tree.SchemaLookupFlags{
+		IncludeOffline: true,
+		IncludeDropped: true,
+		AvoidLeased:    true,
+	}).Immutable().Schema(ctx, schemaID)
 	switch {
 	case scDesc != nil:
 		schemaName = tree.Name(scDesc.GetName())
@@ -300,7 +298,7 @@ func (sr *schemaResolver) getQualifiedFunctionName(
 	if err != nil {
 		return nil, err
 	}
-	scDesc, err := sr.descCollection.GetImmutableSchemaByID(ctx, sr.txn, fnDesc.GetParentSchemaID(), lookupFlags)
+	scDesc, err := sr.descCollection.ByID(sr.txn).WithFlags(lookupFlags).Immutable().Schema(ctx, fnDesc.GetParentSchemaID())
 	if err != nil {
 		return nil, err
 	}
@@ -378,7 +376,7 @@ func (sr *schemaResolver) GetTypeDescriptor(
 		}
 		dbName = db.GetName()
 	}
-	sc, err := tc.GetImmutableSchemaByID(ctx, sr.txn, desc.GetParentSchemaID(), flags)
+	sc, err := tc.ByID(sr.txn).WithFlags(flags).Immutable().Schema(ctx, desc.GetParentSchemaID())
 	if err != nil {
 		return tree.TypeName{}, nil, err
 	}
diff --git a/pkg/sql/schemachanger/scdeps/exec_deps.go b/pkg/sql/schemachanger/scdeps/exec_deps.go
index 344b50d81241..b92305c562e9 100644
--- a/pkg/sql/schemachanger/scdeps/exec_deps.go
+++ b/pkg/sql/schemachanger/scdeps/exec_deps.go
@@ -161,9 +161,7 @@ func (d *txnDeps) GetFullyQualifiedName(ctx context.Context, id descpb.ID) (stri
 		if err != nil {
 			return "", err
 		}
-		schemaDesc, err := d.descsCollection.GetImmutableSchemaByID(
-			ctx, d.txn, objectDesc.GetParentSchemaID(), flags,
-		)
+		schemaDesc, err := d.descsCollection.ByID(d.txn).WithFlags(flags).Immutable().Schema(ctx, objectDesc.GetParentSchemaID())
 		if err != nil {
 			return "", err
 		}
diff --git a/pkg/sql/temporary_schema.go b/pkg/sql/temporary_schema.go
index 2016719e1c0a..dfa8cfd64985 100644
--- a/pkg/sql/temporary_schema.go
+++ b/pkg/sql/temporary_schema.go
@@ -122,7 +122,7 @@ func (p *planner) getOrCreateTemporarySchema(
 		m.SetTemporarySchemaName(tempSchemaName)
 		m.SetTemporarySchemaIDForDatabase(uint32(db.GetID()), uint32(id))
 	})
-	return p.Descriptors().GetImmutableSchemaByID(ctx, p.Txn(), id, p.CommonLookupFlagsRequired())
+	return p.Descriptors().ByID(p.Txn()).WithFlags(p.CommonLookupFlagsRequired()).Immutable().Schema(ctx, id)
 }
 
 // temporarySchemaName returns the session specific temporary schema name given
@@ -317,7 +317,7 @@ func cleanupTempSchemaObjects(
 					if err != nil {
 						return err
 					}
-					sc, err := descsCol.GetImmutableSchemaByID(ctx, txn, dTableDesc.GetParentSchemaID(), flags)
+					sc, err := descsCol.ByID(txn).WithFlags(flags).Immutable().Schema(ctx, dTableDesc.GetParentSchemaID())
 					if err != nil {
 						return err
 					}
diff --git a/pkg/sql/type_change.go b/pkg/sql/type_change.go
index 76193ddab228..6292c7d97835 100644
--- a/pkg/sql/type_change.go
+++ b/pkg/sql/type_change.go
@@ -1164,8 +1164,7 @@ func (t *typeSchemaChanger) canRemoveEnumValueFromArrayUsages(
 		}
 		if len(rows) > 0 {
 			// Use an FQN in the error message.
-			parentSchema, err := descsCol.GetImmutableSchemaByID(
-				ctx, txn, desc.GetParentSchemaID(), tree.SchemaLookupFlags{Required: true})
+			parentSchema, err := descsCol.ByID(txn).WithFlags(tree.SchemaLookupFlags{}).Immutable().Schema(ctx, desc.GetParentSchemaID())
 			if err != nil {
 				return err
 			}