diff --git a/src/main/kotlin/kestrel/store/sql/DiskExecutor.kt b/src/main/kotlin/kestrel/store/sql/DiskExecutor.kt
new file mode 100644
index 0000000..40bd01c
--- /dev/null
+++ b/src/main/kotlin/kestrel/store/sql/DiskExecutor.kt
@@ -0,0 +1,157 @@
+package kestrel.store.sql
+
+import java.math.BigDecimal
+import kestrel.KestrelException
+import kestrel.catalog.CheckConstraint
+import kestrel.catalog.Column
+import kestrel.catalog.ForeignKeyConstraint
+import kestrel.catalog.Sequence
+import kestrel.catalog.SequenceDefinition
+import kestrel.catalog.TableSchema
+import kestrel.catalog.TriggerDefinition
+import kestrel.catalog.UniqueConstraint
+import kestrel.engine.AggregateFunctions
+import kestrel.engine.AlterSequenceResult
+import kestrel.engine.AlterTableResult
+import kestrel.engine.BeginResult
+import kestrel.engine.ColumnResolver
+import kestrel.engine.CommitResult
+import kestrel.engine.collationFoldedKey
+import kestrel.engine.collationFoldedUniquenessKey
+import kestrel.engine.compareOrderKeyValues
+import kestrel.engine.CreateIndexResult
+import kestrel.engine.CreateSequenceResult
+import kestrel.engine.CreateTableResult
+import kestrel.engine.CreateTriggerResult
+import kestrel.engine.CreateViewResult
+import kestrel.engine.DeallocateResult
+import kestrel.engine.DeleteResult
+import kestrel.engine.DropIndexResult
+import kestrel.engine.DropSequenceResult
+import kestrel.engine.DropTableResult
+import kestrel.engine.DropTriggerResult
+import kestrel.engine.DropViewResult
+import kestrel.engine.Evaluator
+import kestrel.engine.ExplainResult
+import kestrel.engine.GroupAggregation
+import kestrel.engine.GroupingSetExpansion
+import kestrel.engine.InsertResult
+import kestrel.engine.MergeResult
+import kestrel.engine.ParameterSubstitution
+import kestrel.engine.PrepareResult
+import kestrel.engine.ReleaseSavepointResult
+import kestrel.engine.RollbackResult
+import kestrel.engine.RollbackToSavepointResult
+import kestrel.engine.SavepointResult
+import kestrel.engine.SelectResult
+import kestrel.engine.SequenceAccess
+import kestrel.engine.StatementResult
+import kestrel.engine.SubqueryRunner
+import kestrel.engine.TriggerRowContext
+import kestrel.engine.TruncateTableResult
+import kestrel.engine.UpdateResult
+import kestrel.sql.ast.AddColumn
+import kestrel.sql.ast.AddConstraint
+import kestrel.sql.ast.AddedCheck
+import kestrel.sql.ast.AddedConstraint
+import kestrel.sql.ast.AddedForeignKey
+import kestrel.sql.ast.AddedUnique
+import kestrel.sql.ast.AlterSequenceStatement
+import kestrel.sql.ast.AlterTableStatement
+import kestrel.sql.ast.BeginStatement
+import kestrel.sql.ast.BetweenExpression
+import kestrel.sql.ast.BinaryExpression
+import kestrel.sql.ast.CallExpression
+import kestrel.sql.ast.CaseExpression
+import kestrel.sql.ast.CastExpression
+import kestrel.sql.ast.ChangeColumnType
+import kestrel.sql.ast.CollateExpression
+import kestrel.sql.ast.ColumnExpression
+import kestrel.sql.ast.CommitStatement
+import kestrel.sql.ast.CommonTableExpression
+import kestrel.sql.ast.ConflictDoNothing
+import kestrel.sql.ast.ConflictDoUpdate
+import kestrel.sql.ast.CreateIndexStatement
+import kestrel.sql.ast.CreateSequenceStatement
+import kestrel.sql.ast.CreateTableStatement
+import kestrel.sql.ast.CreateTriggerStatement
+import kestrel.sql.ast.CreateViewStatement
+import kestrel.sql.ast.CurrentValueExpression
+import kestrel.sql.ast.DeallocateStatement
+import kestrel.sql.ast.DeleteStatement
+import kestrel.sql.ast.DropColumn
+import kestrel.sql.ast.DropConstraint
+import kestrel.sql.ast.DropIndexStatement
+import kestrel.sql.ast.DropMode
+import kestrel.sql.ast.DropSequenceStatement
+import kestrel.sql.ast.DropTableStatement
+import kestrel.sql.ast.DropTriggerStatement
+import kestrel.sql.ast.DropViewStatement
+import kestrel.sql.ast.ExecuteStatement
+import kestrel.sql.ast.ExistsExpression
+import kestrel.sql.ast.ExplainStatement
+import kestrel.sql.ast.Expression
+import kestrel.sql.ast.ExpressionProjection
+import kestrel.sql.ast.FrameBound
+import kestrel.sql.ast.FrameBoundType
+import kestrel.sql.ast.FrameExclude
+import kestrel.sql.ast.FrameUnit
+import kestrel.sql.ast.FromItem
+import kestrel.sql.ast.FunctionExpression
+import kestrel.sql.ast.InExpression
+import kestrel.sql.ast.InSubqueryExpression
+import kestrel.sql.ast.InsertStatement
+import kestrel.sql.ast.IsNullExpression
+import kestrel.sql.ast.JoinClause
+import kestrel.sql.ast.JoinType
+import kestrel.sql.ast.LikeExpression
+import kestrel.sql.ast.LiteralExpression
+import kestrel.sql.ast.MergeActionExpression
+import kestrel.sql.ast.MergeMatchedDelete
+import kestrel.sql.ast.MergeMatchedUpdate
+import kestrel.sql.ast.MergeNotMatchedInsert
+import kestrel.sql.ast.MergeStatement
+import kestrel.sql.ast.NextValueExpression
+import kestrel.sql.ast.OnConflictClause
+import kestrel.sql.ast.OrderKey
+import kestrel.sql.ast.ParameterExpression
+import kestrel.sql.ast.PreparableStatement
+import kestrel.sql.ast.PrepareStatement
+import kestrel.sql.ast.Projection
+import kestrel.sql.ast.QueryStatement
+import kestrel.sql.ast.ReleaseSavepointStatement
+import kestrel.sql.ast.RenameColumn
+import kestrel.sql.ast.RenameTable
+import kestrel.sql.ast.RollbackStatement
+import kestrel.sql.ast.RollbackToSavepointStatement
+import kestrel.sql.ast.SavepointStatement
+import kestrel.sql.ast.ScalarSubqueryExpression
+import kestrel.sql.ast.SelectItem
+import kestrel.sql.ast.SelectStatement
+import kestrel.sql.ast.SetOperationStatement
+import kestrel.sql.ast.SetOperator
+import kestrel.sql.ast.StarProjection
+import kestrel.sql.ast.Statement
+import kestrel.sql.ast.SubquerySource
+import kestrel.sql.ast.TableSource
+import kestrel.sql.ast.TriggerEvent
+import kestrel.sql.ast.TriggerTiming
+import kestrel.sql.ast.TruncateTableStatement
+import kestrel.sql.ast.UnaryExpression
+import kestrel.sql.ast.UpdateStatement
+import kestrel.sql.ast.WindowExpression
+import kestrel.sql.ast.WindowFrame
+import kestrel.sql.ast.WindowFunctionKind
+import kestrel.sql.ast.WithQuery
+import kestrel.store.heap.RecordId
+import kestrel.storage.Collation
+import kestrel.storage.ColumnType
+import kestrel.storage.DecimalColumns
+import kestrel.storage.Row
+import kestrel.storage.Table
+import kestrel.storage.Value
+import kestrel.storage.displayWith
+import kestrel.storage.typeName
+
+class DiskExecutorException(message: String) : KestrelException(message)
+