Package io.substrait.relation

Class AbstractDdlRel

java.lang.Object

io.substrait.relation.AbstractRel

io.substrait.relation.ZeroInputRel

io.substrait.relation.AbstractDdlRel

All Implemented Interfaces:

HasExtension, Rel

Direct Known Subclasses:

ExtensionDdl, NamedDdl

public abstract class AbstractDdlRel
extends ZeroInputRel
implements HasExtension

Base class for DDL relations with no inputs.

Defines schema/defaults, DDL object and operation, and optional view definition.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	AbstractDdlRel.DdlObject	DDL object kinds.
static enum	AbstractDdlRel.DdlOp	DDL operations.

Nested classes/interfaces inherited from interface io.substrait.relation.Rel

Rel.Remap

Constructor Summary

Constructors

Constructor	Description
AbstractDdlRel()

Method Summary

Modifier and Type	Method	Description
Type.Struct	deriveRecordType()	Derives the output record type from the declared schema.
abstract AbstractDdlRel.DdlObject	getObject()	Returns the DDL object kind (table or view).
abstract AbstractDdlRel.DdlOp	getOperation()	Returns the DDL operation (create/alter/drop, etc.).
abstract Expression.StructLiteral	getTableDefaults()	Returns default values for the table columns.
abstract NamedStruct	getTableSchema()	Returns the target table/view schema (names + types).
abstract Optional<Rel>	getViewDefinition()	Returns the view definition when the object is a view.

Methods inherited from class io.substrait.relation.ZeroInputRel

getInputs

Methods inherited from class io.substrait.relation.AbstractRel

getRecordType

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface io.substrait.relation.HasExtension

getExtension

Methods inherited from interface io.substrait.relation.Rel

accept, getCommonExtension, getHint, getRemap

Constructor Details

AbstractDdlRel

public AbstractDdlRel()

Method Details

getTableSchema

public abstract NamedStruct getTableSchema()

Returns the target table/view schema (names + types).

Returns:

target NamedStruct

getTableDefaults

public abstract Expression.StructLiteral getTableDefaults()

Returns default values for the table columns.

Returns:

defaults as Expression.StructLiteral

getObject

public abstract AbstractDdlRel.DdlObject getObject()

Returns the DDL object kind (table or view).

Returns:

DDL object

getOperation

public abstract AbstractDdlRel.DdlOp getOperation()

Returns the DDL operation (create/alter/drop, etc.).

Returns:

DDL operation

getViewDefinition

public abstract Optional<Rel> getViewDefinition()

Returns the view definition when the object is a view.

Returns:

optional view definition relation

deriveRecordType

public Type.Struct deriveRecordType()

Derives the output record type from the declared schema.

Specified by:

deriveRecordType in class AbstractRel

Returns:

Type.Struct from getTableSchema()