JoinNamespace (Apache Calcite API)

java.lang.Object
- org.apache.calcite.sql.validate.AbstractNamespace
- - org.apache.calcite.sql.validate.JoinNamespace

All Implemented Interfaces:

SqlValidatorNamespace
```
class JoinNamespace
extends AbstractNamespace
```
Namespace representing the row type produced by joining two relations.

Field Summary

Fields
Modifier and Type Field Description

private SqlJoin join
- Fields inherited from class org.apache.calcite.sql.validate.AbstractNamespace
  enclosingNode, rowType, type, validator

Constructor Summary

Constructors
Constructor Description

JoinNamespace(SqlValidatorImpl validator, SqlJoin join)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`SqlNode`	`getNode()`	Returns the parse tree node at the root of this namespace.
`protected RelDataType`	`validateImpl(RelDataType targetRowType)`	Validates this scope and returns the type of the records it returns.

Methods inherited from class org.apache.calcite.sql.validate.AbstractNamespace
convertToStruct, fieldExists, getEnclosingNode, getMonotonicExprs, getMonotonicity, getRowType, getRowTypeSansSystemColumns, getTable, getType, getValidator, isWrapperFor, lookupChild, makeNullable, resolve, setType, supportsModality, toStruct, translate, unwrap, validate

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - join
```
private final SqlJoin join
```
- Constructor Detail
  - JoinNamespace
```
JoinNamespace(SqlValidatorImpl validator,
              SqlJoin join)
```
- Method Detail
  - validateImpl
```
protected RelDataType validateImpl(RelDataType targetRowType)
```
    Description copied from class: AbstractNamespace
    
    Validates this scope and returns the type of the records it returns. External users should call AbstractNamespace.validate(org.apache.calcite.rel.type.RelDataType), which uses the AbstractNamespace.status field to protect against cycles.
    
    Specified by:
    
    validateImpl in class AbstractNamespace
    
    Parameters:
    
    targetRowType - Desired row type, must not be null, may be the data type 'unknown'.
    
    Returns:
    
    record data type, never null
  - getNode
```
public SqlNode getNode()
```
    Description copied from interface: SqlValidatorNamespace
    
    Returns the parse tree node at the root of this namespace.
    
    Returns:
    
    parse tree node; null for TableNamespace