public class ExpressionSelect extends java.lang.Object implements Select
SELECT <expression> AS <alias> FROM ...
Selects.expression(Expression, String)
Modifier and Type | Field and Description |
---|---|
private java.lang.String |
alias |
private Expression |
e1 |
private boolean |
useInDistinctCount |
Constructor and Description |
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ExpressionSelect(Expression e1,
java.lang.String alias,
boolean useInDistinctCount) |
Modifier and Type | Method and Description |
---|---|
boolean |
equals(java.lang.Object other)
This expression is equal to another ExpressionSelect if their
child expressions and aliases are equal.
|
java.lang.String |
getAlias()
Get the alias of the selected expression.
|
java.util.Collection<? extends QueryElement> |
getChildren()
Get the children of this query element or null if it has no children.
|
Expression |
getExpression()
Get the expression object representing the selected expression.
|
int |
hashCode() |
java.lang.String |
toQl(Query query,
DbControl dc)
Create a query language string of the query element.
|
java.lang.String |
toString() |
boolean |
useInDistinctCount()
If this expression should be use in count distinct queries or not.
|
private final Expression e1
private final java.lang.String alias
private final boolean useInDistinctCount
ExpressionSelect(Expression e1, java.lang.String alias, boolean useInDistinctCount)
public java.lang.String toQl(Query query, DbControl dc) throws BaseException
QueryElement
Query.getQueryType()
method to find out which query language is wanted
in case the element requires different syntax for different languages.toQl
in interface QueryElement
query
- The query that is about to be executeddc
- The DbControl
object used to execute the queryBaseException
- If there is any other errorpublic java.util.Collection<? extends QueryElement> getChildren()
QueryElement
AddExpression
has two children, the expression
beeing added.getChildren
in interface QueryElement
public java.lang.String getAlias()
Select
public Expression getExpression()
Select
getExpression
in interface Select
public boolean useInDistinctCount()
Select
SELECT COUNT(DISTINCT expression)
useInDistinctCount
in interface Select
public java.lang.String toString()
toString
in class java.lang.Object
public boolean equals(java.lang.Object other)
equals
in class java.lang.Object
public int hashCode()
hashCode
in class java.lang.Object