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java.lang.Objectorg.eclipse.persistence.jpa.jpql.parser.AbstractExpression
org.eclipse.persistence.jpa.jpql.parser.AbstractEncapsulatedExpression
org.eclipse.persistence.jpa.jpql.parser.AbstractSingleEncapsulatedExpression
org.eclipse.persistence.jpa.jpql.parser.AggregateFunction
org.eclipse.persistence.jpa.jpql.parser.SumFunction
public final class SumFunction
One of the aggregate functions. The arguments must be numeric.
SUM returns Long when applied to state-fields of integral types (other than
BigInteger); Double when applied to state-fields of floating point
types; BigInteger when applied to state-fields of type BigInteger; and
BigDecimal when applied to state-fields of type BigDecimal. If
SUM, AVG, MAX, or MIN is used, and there are no values to which the
aggregate function can be applied, the result of the aggregate function is NULL. If
COUNT is used, and there are no values to which COUNT can be applied, the
result of the aggregate function is 0.
expression ::= SUM([DISTINCT] state_field_path_expression)
| Field Summary |
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| Fields inherited from class org.eclipse.persistence.jpa.jpql.parser.AbstractExpression |
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COMMA, DOT, DOUBLE_QUOTE, LEFT_CURLY_BRACKET, LEFT_PARENTHESIS, NOT_DEFINED, RIGHT_CURLY_BRACKET, RIGHT_PARENTHESIS, SINGLE_QUOTE, SPACE, UNDERSCORE |
| Constructor Summary | |
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SumFunction(AbstractExpression parent)
Creates a new SumFunction. |
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| Method Summary | |
|---|---|
void |
accept(ExpressionVisitor visitor)
Visits this Expression by the given visitor. |
protected java.lang.String |
parseIdentifier(WordParser wordParser)
Parses the identifier of this expression. |
| Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.AggregateFunction |
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addOrderedEncapsulatedExpressionTo, buildEncapsulatedExpression, encapsulatedExpressionBNF, getActualDistinctIdentifier, getQueryBNF, hasDistinct, hasSpaceAfterDistinct, parseEncapsulatedExpression, toParsedTextEncapsulatedExpression |
| Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.AbstractSingleEncapsulatedExpression |
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acceptChildren, addChildrenTo, findQueryBNF, getExpression, hasEncapsulatedExpression, hasExpression, removeEncapsulatedExpression, setExpression |
| Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.AbstractEncapsulatedExpression |
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addOrderedChildrenTo, areLogicalIdentifiersSupported, getActualIdentifier, getIdentifier, hasLeftParenthesis, hasRightParenthesis, hasSpaceAfterIdentifier, isParsingComplete, parse, shouldParseRightParenthesis, toParsedText |
| Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
| Constructor Detail |
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public SumFunction(AbstractExpression parent)
SumFunction.
parent - The parent of this expression| Method Detail |
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public void accept(ExpressionVisitor visitor)
Expression by the given visitor.
visitor - The ExpressionVisitor to visit this objectprotected java.lang.String parseIdentifier(WordParser wordParser)
parseIdentifier in class AbstractEncapsulatedExpression
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