SubqueryExpression

java.lang.Object
- org.datanucleus.store.query.expression.Expression
- - org.datanucleus.store.query.expression.SubqueryExpression

All Implemented Interfaces:

java.io.Serializable
```
public class SubqueryExpression
extends Expression
```
Expression containing a subquery. A subquery is formed from a keyword and a variable expression representing the subquery, so something like
```
KEYWORD(subquery)
```
e.g
```
EXISTS (SELECT 1 FROM MYTABLE WHERE MYID = 4)
```
See Also:

Serialized Form

Nested Class Summary
- Nested classes/interfaces inherited from class org.datanucleus.store.query.expression.Expression
  Expression.DyadicOperator, Expression.MonadicOperator, Expression.Operator

Field Summary

Fields
Modifier and Type Field Description

(package private) java.lang.String keyword

private static long serialVersionUID
- Fields inherited from class org.datanucleus.store.query.expression.Expression
  alias, left, op, OP_ADD, OP_AND, OP_BIT_AND, OP_BIT_OR, OP_BIT_XOR, OP_CAST, OP_COM, OP_CONCAT, OP_DISTINCT, OP_DIV, OP_EQ, OP_GT, OP_GTEQ, OP_IN, OP_IS, OP_ISNOT, OP_LIKE, OP_LT, OP_LTEQ, OP_MOD, OP_MUL, OP_NEG, OP_NOT, OP_NOTEQ, OP_NOTIN, OP_OR, OP_SUB, parent, right, symbol

Constructor Summary

Constructors
Constructor Description

SubqueryExpression(java.lang.String keyword, VariableExpression operand)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Symbol`	`bind(SymbolTable symtbl)`	Method to bind the expression to the symbol table as appropriate.
`java.lang.String`	`getKeyword()`
`java.lang.String`	`toString()`

Methods inherited from class org.datanucleus.store.query.expression.Expression
evaluate, getAlias, getLeft, getOperator, getParent, getRight, getSymbol, setAlias, setLeft, setRight

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

- Field Detail
  - serialVersionUID
```
private static final long serialVersionUID
```
    See Also:
    
    Constant Field Values
  - keyword
```
java.lang.String keyword
```
- Constructor Detail
  - SubqueryExpression
```
public SubqueryExpression(java.lang.String keyword,
                          VariableExpression operand)
```
    Parameters:
    
    keyword - The keyword on the subquery
    
    operand - The variable expression representing the subquery
- Method Detail
  - bind
```
public Symbol bind(SymbolTable symtbl)
```
    Description copied from class: Expression
    
    Method to bind the expression to the symbol table as appropriate.
    
    Specified by:
    
    bind in class Expression
    
    Parameters:
    
    symtbl - Symbol table
    
    Returns:
    
    The symbol for this expression
  - getKeyword
```
public java.lang.String getKeyword()
```
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Object