public abstract class AggregateFunction extends AbstractSingleEncapsulatedExpression
A single_valued_association_field
is designated by the name of an association-field
in a one-to-one or many-to-one relationship. The type of a single_valued_association_field
and thus a single_valued_association_path_expression
is the abstract schema type of
the related entity.
The argument to an aggregate function may be preceded by the keyword DISTINCT to specify that duplicate values are to be eliminated before the aggregate function is applied. Null values are eliminated before the aggregate function is applied, regardless of whether the keyword DISTINCT is specified.
aggregate_expression ::= { AVG | MAX | MIN | SUM } ([DISTINCT] state_field_path_expression) |
COUNT ([DISTINCT] identification_variable |
state_field_path_expression |
single_valued_object_path_expression)
AvgFunction
,
CountFunction
,
MaxFunction
,
MinFunction
,
SumFunction
COMMA, DOT, DOUBLE_QUOTE, LEFT_CURLY_BRACKET, LEFT_PARENTHESIS, NOT_DEFINED, RIGHT_CURLY_BRACKET, RIGHT_PARENTHESIS, SINGLE_QUOTE, SPACE, UNDERSCORE
ABS, ALL, AND, ANY, AS, AS_OF, ASC, AVG, BETWEEN, BIT_LENGTH, BOTH, CASE, CAST, CHAR_LENGTH, CHARACTER_LENGTH, CLASS, COALESCE, COLUMN, CONCAT, CONNECT_BY, COUNT, CURRENT_DATE, CURRENT_TIME, CURRENT_TIMESTAMP, DELETE, DELETE_FROM, DESC, DIFFERENT, DISTINCT, DIVISION, ELSE, EMPTY, END, ENTRY, EQUAL, ESCAPE, EXCEPT, EXISTS, EXTRACT, FALSE, FETCH, FIRST, FROM, FUNC, FUNCTION, GREATER_THAN, GREATER_THAN_OR_EQUAL, GROUP_BY, HAVING, IN, INDEX, INNER, INNER_JOIN, INNER_JOIN_FETCH, INTERSECT, IS, IS_EMPTY, IS_NOT_EMPTY, IS_NOT_NULL, IS_NULL, JOIN, JOIN_FETCH, KEY, LAST, LEADING, LEFT, LEFT_JOIN, LEFT_JOIN_FETCH, LEFT_OUTER_JOIN, LEFT_OUTER_JOIN_FETCH, LENGTH, LIKE, LOCATE, LOWER, LOWER_THAN, LOWER_THAN_OR_EQUAL, MAX, MEMBER, MEMBER_OF, MIN, MINUS, MOD, MULTIPLICATION, NAMED_PARAMETER, NEW, NOT, NOT_BETWEEN, NOT_EQUAL, NOT_EXISTS, NOT_IN, NOT_LIKE, NOT_MEMBER, NOT_MEMBER_OF, NULL, NULLIF, NULLS, NULLS_FIRST, NULLS_LAST, OBJECT, OF, ON, OPERATOR, OR, ORDER_BY, ORDER_SIBLINGS_BY, OUTER, PLUS, POSITION, POSITIONAL_PARAMETER, QUOTE, REGEXP, SCN, SELECT, SET, SIZE, SOME, SQL, SQRT, START_WITH, SUBSTRING, SUM, TABLE, THEN, TIMESTAMP, TRAILING, TREAT, TRIM, TRUE, TYPE, UNION, UNKNOWN, UPDATE, UPPER, VALUE, WHEN, WHERE
Modifier and Type | Method and Description |
---|---|
java.lang.String |
getActualDistinctIdentifier()
Returns the actual DISTINCT identifier found in the string representation of the JPQL
query, which has the actual case that was used.
|
java.lang.String |
getEncapsulatedExpressionQueryBNFId()
Returns the BNF used to parse the encapsulated expression.
|
JPQLQueryBNF |
getQueryBNF()
Returns the BNF of this
Expression . |
boolean |
hasDistinct()
Determines whether the DISTINCT identifier was specified in the query.
|
boolean |
hasSpaceAfterDistinct()
Determines whether a whitespace was parsed after DISTINCT.
|
acceptChildren, findQueryBNF, getExpression, hasEncapsulatedExpression, hasExpression, setExpression
getActualIdentifier, getIdentifier, hasLeftParenthesis, hasRightParenthesis, hasSpaceAfterIdentifier
children, getGrammar, getIdentifierVersion, getLength, getOffset, getParent, getQueryBNF, getRoot, isAncestor, orderedChildren, populatePosition, toActualText, toParsedText, toString
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait
accept
public java.lang.String getEncapsulatedExpressionQueryBNFId()
getEncapsulatedExpressionQueryBNFId
in class AbstractSingleEncapsulatedExpression
public java.lang.String getActualDistinctIdentifier()
public JPQLQueryBNF getQueryBNF()
Expression
.JPQLQueryBNF
, which represents the grammar of this Expression
public final boolean hasDistinct()
true
if the query has DISTINCT; false
otherwisepublic final boolean hasSpaceAfterDistinct()
true
if there was a whitespace after DISTINCT; false
otherwiseEclipseLink 2.6.3, "build v20160428-59c81c5" API Reference