diff --git a/pkg/sql/schemachanger/scexec/mutation_desc_getter.go b/pkg/sql/schemachanger/scexec/mutation_desc_getter.go
index 19214d871081..a4ca4e475cce 100644
--- a/pkg/sql/schemachanger/scexec/mutation_desc_getter.go
+++ b/pkg/sql/schemachanger/scexec/mutation_desc_getter.go
@@ -112,4 +112,4 @@ func (m *mutationDescGetter) RemoveObjectComments(ctx context.Context, id descpb
 	return err
 }
 
-var _ scmutationexec.MutableDescGetter = (*mutationDescGetter)(nil)
+var _ scmutationexec.Catalog = (*mutationDescGetter)(nil)
diff --git a/pkg/sql/schemachanger/scexec/scmutationexec/scmutationexec.go b/pkg/sql/schemachanger/scexec/scmutationexec/scmutationexec.go
index b78bc53304bc..fac78a0bf74c 100644
--- a/pkg/sql/schemachanger/scexec/scmutationexec/scmutationexec.go
+++ b/pkg/sql/schemachanger/scexec/scmutationexec/scmutationexec.go
@@ -31,17 +31,35 @@ import (
 	"github.com/cockroachdb/errors"
 )
 
-// MutableDescGetter encapsulates the logic to retrieve descriptors.
-// All retrieved descriptors are modified.
-type MutableDescGetter interface {
+// DescriptorReader encapsulates logic used to retrieve
+// and track modified descriptors.
+type DescriptorReader interface {
 	GetMutableTypeByID(ctx context.Context, id descpb.ID) (*typedesc.Mutable, error)
 	GetImmutableDatabaseByID(ctx context.Context, id descpb.ID) (catalog.DatabaseDescriptor, error)
 	GetMutableTableByID(ctx context.Context, id descpb.ID) (*tabledesc.Mutable, error)
+}
+
+// NamespaceWriter encapsulates operations used to manipulate
+// namespaces.
+type NamespaceWriter interface {
 	AddDrainedName(id descpb.ID, nameInfo descpb.NameInfo)
 	SubmitDrainedNames(ctx context.Context, codec keys.SQLCodec, ba *kv.Batch) error
+}
+
+// CommentWriter encapsulates operations used to manipulate
+// object comments.
+type CommentWriter interface {
 	RemoveObjectComments(ctx context.Context, id descpb.ID) error
 }
 
+// Catalog encapsulates the logic to modify descriptors,
+// namespaces, comments to help support schema changer mutations.
+type Catalog interface {
+	DescriptorReader
+	NamespaceWriter
+	CommentWriter
+}
+
 // MutationJobs encapsulates the logic to create different types
 // of jobs.
 type MutationJobs interface {
@@ -50,19 +68,19 @@ type MutationJobs interface {
 }
 
 // NewMutationVisitor creates a new scop.MutationVisitor.
-func NewMutationVisitor(descs MutableDescGetter, jobs MutationJobs) scop.MutationVisitor {
-	return &visitor{descs: descs, jobs: jobs}
+func NewMutationVisitor(catalog Catalog, jobs MutationJobs) scop.MutationVisitor {
+	return &visitor{catalog: catalog, jobs: jobs}
 }
 
 type visitor struct {
-	descs MutableDescGetter
-	jobs  MutationJobs
+	catalog Catalog
+	jobs    MutationJobs
 }
 
 func (m *visitor) MakeAddedColumnDeleteAndWriteOnly(
 	ctx context.Context, op scop.MakeAddedColumnDeleteAndWriteOnly,
 ) error {
-	table, err := m.descs.GetMutableTableByID(ctx, op.TableID)
+	table, err := m.catalog.GetMutableTableByID(ctx, op.TableID)
 	if err != nil {
 		return err
 	}
@@ -77,7 +95,7 @@ func (m *visitor) MakeAddedColumnDeleteAndWriteOnly(
 
 func (m *visitor) UpdateRelationDeps(ctx context.Context, op scop.UpdateRelationDeps) error {
 	// TODO(fqazi): Only implemented for sequences.
-	tableDesc, err := m.descs.GetMutableTableByID(ctx, op.TableID)
+	tableDesc, err := m.catalog.GetMutableTableByID(ctx, op.TableID)
 	if err != nil {
 		return err
 	}
@@ -124,7 +142,7 @@ func (m *visitor) RemoveColumnDefaultExpression(
 	ctx context.Context, op scop.RemoveColumnDefaultExpression,
 ) error {
 	// Remove the descriptors namespaces as the last stage
-	tableDesc, err := m.descs.GetMutableTableByID(ctx, op.TableID)
+	tableDesc, err := m.catalog.GetMutableTableByID(ctx, op.TableID)
 	if err != nil {
 		return err
 	}
@@ -143,7 +161,7 @@ func (m *visitor) RemoveRelationDependedOnBy(
 	ctx context.Context, op scop.RemoveRelationDependedOnBy,
 ) error {
 	// Remove the descriptors namespaces as the last stage
-	tableDesc, err := m.descs.GetMutableTableByID(ctx, op.TableID)
+	tableDesc, err := m.catalog.GetMutableTableByID(ctx, op.TableID)
 	if err != nil {
 		return err
 	}
@@ -157,7 +175,7 @@ func (m *visitor) RemoveRelationDependedOnBy(
 }
 
 func (m *visitor) RemoveSequenceOwnedBy(ctx context.Context, op scop.RemoveSequenceOwnedBy) error {
-	mutDesc, err := m.descs.GetMutableTableByID(ctx, op.TableID)
+	mutDesc, err := m.catalog.GetMutableTableByID(ctx, op.TableID)
 	if err != nil {
 		return err
 	}
@@ -167,7 +185,7 @@ func (m *visitor) RemoveSequenceOwnedBy(ctx context.Context, op scop.RemoveSeque
 }
 
 func (m *visitor) RemoveTypeBackRef(ctx context.Context, op scop.RemoveTypeBackRef) error {
-	mutDesc, err := m.descs.GetMutableTypeByID(ctx, op.TypeID)
+	mutDesc, err := m.catalog.GetMutableTypeByID(ctx, op.TypeID)
 	if err != nil {
 		return err
 	}
@@ -194,7 +212,7 @@ func (m *visitor) CreateGcJobForDescriptor(
 func (m *visitor) MarkDescriptorAsDropped(
 	ctx context.Context, op scop.MarkDescriptorAsDropped,
 ) error {
-	tableDesc, err := m.descs.GetMutableTableByID(ctx, op.TableID)
+	tableDesc, err := m.catalog.GetMutableTableByID(ctx, op.TableID)
 	if err != nil {
 		return err
 	}
@@ -204,7 +222,7 @@ func (m *visitor) MarkDescriptorAsDropped(
 }
 
 func (m *visitor) DrainDescriptorName(ctx context.Context, op scop.DrainDescriptorName) error {
-	tableDesc, err := m.descs.GetMutableTableByID(ctx, op.TableID)
+	tableDesc, err := m.catalog.GetMutableTableByID(ctx, op.TableID)
 	if err != nil {
 		return err
 	}
@@ -214,12 +232,12 @@ func (m *visitor) DrainDescriptorName(ctx context.Context, op scop.DrainDescript
 		ParentID:       tableDesc.ParentID,
 		ParentSchemaID: parentSchemaID,
 		Name:           tableDesc.Name}
-	m.descs.AddDrainedName(tableDesc.GetID(), nameDetails)
+	m.catalog.AddDrainedName(tableDesc.GetID(), nameDetails)
 	return nil
 }
 
 func (m *visitor) MakeColumnPublic(ctx context.Context, op scop.MakeColumnPublic) error {
-	table, err := m.descs.GetMutableTableByID(ctx, op.TableID)
+	table, err := m.catalog.GetMutableTableByID(ctx, op.TableID)
 	if err != nil {
 		return err
 	}
@@ -243,7 +261,7 @@ func (m *visitor) MakeColumnPublic(ctx context.Context, op scop.MakeColumnPublic
 func (m *visitor) MakeDroppedNonPrimaryIndexDeleteAndWriteOnly(
 	ctx context.Context, op scop.MakeDroppedNonPrimaryIndexDeleteAndWriteOnly,
 ) error {
-	table, err := m.descs.GetMutableTableByID(ctx, op.TableID)
+	table, err := m.catalog.GetMutableTableByID(ctx, op.TableID)
 	if err != nil {
 		return err
 	}
@@ -266,7 +284,7 @@ func (m *visitor) MakeDroppedNonPrimaryIndexDeleteAndWriteOnly(
 func (m *visitor) MakeDroppedColumnDeleteAndWriteOnly(
 	ctx context.Context, op scop.MakeDroppedColumnDeleteAndWriteOnly,
 ) error {
-	table, err := m.descs.GetMutableTableByID(ctx, op.TableID)
+	table, err := m.catalog.GetMutableTableByID(ctx, op.TableID)
 	if err != nil {
 		return err
 	}
@@ -289,7 +307,7 @@ func (m *visitor) MakeDroppedColumnDeleteAndWriteOnly(
 func (m *visitor) MakeDroppedColumnDeleteOnly(
 	ctx context.Context, op scop.MakeDroppedColumnDeleteOnly,
 ) error {
-	table, err := m.descs.GetMutableTableByID(ctx, op.TableID)
+	table, err := m.catalog.GetMutableTableByID(ctx, op.TableID)
 	if err != nil {
 		return err
 	}
@@ -303,7 +321,7 @@ func (m *visitor) MakeDroppedColumnDeleteOnly(
 }
 
 func (m *visitor) MakeColumnAbsent(ctx context.Context, op scop.MakeColumnAbsent) error {
-	table, err := m.descs.GetMutableTableByID(ctx, op.TableID)
+	table, err := m.catalog.GetMutableTableByID(ctx, op.TableID)
 	if err != nil {
 		return err
 	}
@@ -324,7 +342,7 @@ func (m *visitor) MakeColumnAbsent(ctx context.Context, op scop.MakeColumnAbsent
 func (m *visitor) MakeAddedIndexDeleteAndWriteOnly(
 	ctx context.Context, op scop.MakeAddedIndexDeleteAndWriteOnly,
 ) error {
-	table, err := m.descs.GetMutableTableByID(ctx, op.TableID)
+	table, err := m.catalog.GetMutableTableByID(ctx, op.TableID)
 	if err != nil {
 		return err
 	}
@@ -340,7 +358,7 @@ func (m *visitor) MakeAddedIndexDeleteAndWriteOnly(
 func (m *visitor) MakeAddedColumnDeleteOnly(
 	ctx context.Context, op scop.MakeAddedColumnDeleteOnly,
 ) error {
-	table, err := m.descs.GetMutableTableByID(ctx, op.TableID)
+	table, err := m.catalog.GetMutableTableByID(ctx, op.TableID)
 	if err != nil {
 		return err
 	}
@@ -380,7 +398,7 @@ func (m *visitor) MakeAddedColumnDeleteOnly(
 func (m *visitor) MakeDroppedIndexDeleteOnly(
 	ctx context.Context, op scop.MakeDroppedIndexDeleteOnly,
 ) error {
-	table, err := m.descs.GetMutableTableByID(ctx, op.TableID)
+	table, err := m.catalog.GetMutableTableByID(ctx, op.TableID)
 	if err != nil {
 		return err
 	}
@@ -396,7 +414,7 @@ func (m *visitor) MakeDroppedIndexDeleteOnly(
 func (m *visitor) MakeDroppedPrimaryIndexDeleteAndWriteOnly(
 	ctx context.Context, op scop.MakeDroppedPrimaryIndexDeleteAndWriteOnly,
 ) error {
-	table, err := m.descs.GetMutableTableByID(ctx, op.TableID)
+	table, err := m.catalog.GetMutableTableByID(ctx, op.TableID)
 	if err != nil {
 		return err
 	}
@@ -415,7 +433,7 @@ func (m *visitor) MakeAddedIndexDeleteOnly(
 	ctx context.Context, op scop.MakeAddedIndexDeleteOnly,
 ) error {
 
-	table, err := m.descs.GetMutableTableByID(ctx, op.TableID)
+	table, err := m.catalog.GetMutableTableByID(ctx, op.TableID)
 	if err != nil {
 		return err
 	}
@@ -432,7 +450,7 @@ func (m *visitor) MakeAddedIndexDeleteOnly(
 }
 
 func (m *visitor) AddCheckConstraint(ctx context.Context, op scop.AddCheckConstraint) error {
-	table, err := m.descs.GetMutableTableByID(ctx, op.TableID)
+	table, err := m.catalog.GetMutableTableByID(ctx, op.TableID)
 	if err != nil {
 		return err
 	}
@@ -454,7 +472,7 @@ func (m *visitor) AddCheckConstraint(ctx context.Context, op scop.AddCheckConstr
 func (m *visitor) MakeAddedPrimaryIndexPublic(
 	ctx context.Context, op scop.MakeAddedPrimaryIndexPublic,
 ) error {
-	table, err := m.descs.GetMutableTableByID(ctx, op.TableID)
+	table, err := m.catalog.GetMutableTableByID(ctx, op.TableID)
 	if err != nil {
 		return err
 	}
@@ -471,7 +489,7 @@ func (m *visitor) MakeAddedPrimaryIndexPublic(
 }
 
 func (m *visitor) MakeIndexAbsent(ctx context.Context, op scop.MakeIndexAbsent) error {
-	table, err := m.descs.GetMutableTableByID(ctx, op.TableID)
+	table, err := m.catalog.GetMutableTableByID(ctx, op.TableID)
 	if err != nil {
 		return err
 	}
@@ -484,7 +502,7 @@ func (m *visitor) MakeIndexAbsent(ctx context.Context, op scop.MakeIndexAbsent)
 }
 
 func (m *visitor) AddColumnFamily(ctx context.Context, op scop.AddColumnFamily) error {
-	table, err := m.descs.GetMutableTableByID(ctx, op.TableID)
+	table, err := m.catalog.GetMutableTableByID(ctx, op.TableID)
 	if err != nil {
 		return err
 	}
@@ -496,7 +514,7 @@ func (m *visitor) AddColumnFamily(ctx context.Context, op scop.AddColumnFamily)
 }
 
 func (m *visitor) DropForeignKeyRef(ctx context.Context, op scop.DropForeignKeyRef) error {
-	table, err := m.descs.GetMutableTableByID(ctx, op.TableID)
+	table, err := m.catalog.GetMutableTableByID(ctx, op.TableID)
 	if err != nil {
 		return err
 	}