All Superinterfaces:

CqnToken, JSONizable

All Known Subinterfaces:

CqnJoin, CqnSelect, CqnStructuredTypeRef, Source<T>, StructuredType<T>, StructuredTypeRef

All Known Implementing Classes:

Select
```
public interface CqnSource
extends CqnToken
```

Method Summary

All Methods Instance Methods Default Methods Deprecated Methods
Modifier and Type	Method	Description
`default CqnJoin`	`asJoin()`	Casts this CQN source to a `CqnJoin`.
`default CqnSelect`	`asQuery()`	Deprecated. instead use `asSelect()`
`default CqnStructuredTypeRef`	`asRef()`	Casts this CQN source to `CqnSelect`.
`default CqnSelect`	`asSelect()`	Casts this CQN source to a `CqnSelect`.
`default boolean`	`isJoin()`	Returns `true` if this is a `CqnJoin`.
`default boolean`	`isQuery()`	Deprecated. instead use `isSelect()`
`default boolean`	`isRef()`	Returns `true` if this is a `CqnStructuredTypeRef`.
`default boolean`	`isSelect()`	Returns `true` if this is a `CqnSelect` statement.

Methods inherited from interface com.sap.cds.ql.cqn.CqnToken
accept, tokens

Methods inherited from interface com.sap.cds.JSONizable
toJson

- Method Detail
  - isRef
```
default boolean isRef()
```
    Returns true if this is a CqnStructuredTypeRef.
    
    Returns:
    
    true if this is a structured type reference, otherwise false
  - isSelect
```
default boolean isSelect()
```
    Returns true if this is a CqnSelect statement.
    
    Returns:
    
    true if this is a select statement, otherwise false
  - isJoin
```
default boolean isJoin()
```
    Returns true if this is a CqnJoin.
    
    Returns:
    
    true if this is a join, otherwise false
  - isQuery
```
@Deprecated
default boolean isQuery()
```
    Deprecated.
    instead use isSelect()
    
    Returns true if this is a CqnSelect statement.
    
    Returns:
    
    true if this is a select statement, otherwise false
  - asRef
```
default CqnStructuredTypeRef asRef()
```
    Casts this CQN source to CqnSelect.
    
    Returns:
    
    this CQN source as a CqnSelect
    
    Throws:
    
    ClassCastException - if this CQN source is not a select
  - asSelect
```
default CqnSelect asSelect()
```
    Casts this CQN source to a CqnSelect.
    
    Returns:
    
    this CQN source as a CqnSelect
    
    Throws:
    
    ClassCastException - if this CQN source is not a select
  - asJoin
```
default CqnJoin asJoin()
```
    Casts this CQN source to a CqnJoin.
    
    Returns:
    
    this CQN source as a CqnJoin
    
    Throws:
    
    ClassCastException - if this CQN source is not a join
  - asQuery
```
default CqnSelect asQuery()
```
    Deprecated.
    instead use asSelect()
    
    Casts this CQN source to a CqnSelect.
    
    Returns:
    
    this source as a CqnSelect
    
    Throws:
    
    ClassCastException - if this CQN source is not a select

Interface CqnSource

Method Summary

Methods inherited from interface com.sap.cds.ql.cqn.CqnToken

Methods inherited from interface com.sap.cds.JSONizable

Method Detail

isRef

isSelect

isJoin

isQuery

asRef

asSelect

asJoin

asQuery