public final class HierarchicalQueryClause extends AbstractExpression
START WITH specifies the root row(s) of the hierarchy.
CONNECT BY specifies the relationship between parent rows and child rows of
the hierarchy.
hierarchical_query_clause ::= [start_with_clause] connectby_clause [order_siblings_by_clause]StartWithClause,
ConnectByClause,
OrderSiblingsByClauseCOMMA, DOT, DOUBLE_QUOTE, LEFT_CURLY_BRACKET, LEFT_PARENTHESIS, NOT_DEFINED, RIGHT_CURLY_BRACKET, RIGHT_PARENTHESIS, SINGLE_QUOTE, SPACE, UNDERSCOREABS, 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| Constructor and Description |
|---|
HierarchicalQueryClause(AbstractExpression parent)
Creates a new
HierarchicalQueryClause. |
| Modifier and Type | Method and Description |
|---|---|
void |
accept(ExpressionVisitor visitor)
Visits this
Expression by the given visitor. |
void |
acceptChildren(ExpressionVisitor visitor)
Visits the children of this
Expression. |
JPQLQueryBNF |
findQueryBNF(Expression expression)
Retrieves the
JPQLQueryBNF that represents the fragment of this Expression
that was used when parsing the given Expression. |
Expression |
getConnectByClause()
Returns the
Expression representing the CONNECT BY clause. |
Expression |
getOrderSiblingsByClause()
Returns the
Expression representing the ORDER SIBLINGS BY clause. |
JPQLQueryBNF |
getQueryBNF()
Returns the BNF of this
Expression. |
Expression |
getStartWithClause()
Returns the
Expression representing the START WITH clause. |
boolean |
hasConnectByClause()
Determines whether the CONNECT BY clause is defined.
|
boolean |
hasOrderSiblingsByClause()
Determines whether the ORDER SIBLINGS BY clause is defined.
|
boolean |
hasSpaceAfterConnectByClause()
Determines whether a whitespace was found after the
CONNECT BY clause. |
boolean |
hasSpaceAfterStartWithClause()
Determines whether a whitespace was found after the
START WITH clause. |
boolean |
hasStartWithClause()
Determines whether the START WITH clause is defined.
|
children, getGrammar, getIdentifierVersion, getLength, getOffset, getParent, getQueryBNF, getRoot, isAncestor, orderedChildren, populatePosition, toActualText, toParsedText, toStringpublic HierarchicalQueryClause(AbstractExpression parent)
HierarchicalQueryClause.parent - The parent of this expressionpublic void accept(ExpressionVisitor visitor)
Expression by the given visitor.visitor - The ExpressionVisitor to visit this objectpublic void acceptChildren(ExpressionVisitor visitor)
Expression. This method can be used to optimize traversing
the children since a new list is not created every time Expression.children() is called.
This does not traverse the Expression sub-hierarchy, use a subclass of
AbstractTraverseChildrenVisitor in order to traverse the entire sub-hierarchy.
visitor - The visitor to visit the children of this object.public JPQLQueryBNF findQueryBNF(Expression expression)
JPQLQueryBNF that represents the fragment of this Expression
that was used when parsing the given Expression.findQueryBNF in interface ExpressionfindQueryBNF in class AbstractExpressionexpression - The Expression that is a descendant of this oneJPQLQueryBNF that was used to parse the given expressionpublic Expression getConnectByClause()
Expression representing the CONNECT BY clause.public Expression getOrderSiblingsByClause()
Expression representing the ORDER SIBLINGS BY clause.public JPQLQueryBNF getQueryBNF()
Expression.JPQLQueryBNF, which represents the grammar of this Expressionpublic Expression getStartWithClause()
Expression representing the START WITH clause.public boolean hasConnectByClause()
true if the query that got parsed had the CONNECT BY clausepublic boolean hasOrderSiblingsByClause()
true if the query that got parsed had the ORDER SIBLINGS BY clausepublic boolean hasSpaceAfterConnectByClause()
CONNECT BY clause. In
some cases, the space is owned by a child of the hierarchical query clause.true if there was a whitespace after the CONNECT BY
clause and owned by this expression; false otherwisepublic boolean hasSpaceAfterStartWithClause()
START WITH clause. In
some cases, the space is owned by a child of the hierarchical query clause.true if there was a whitespace after the START WITH
clause and owned by this expression; false otherwisepublic boolean hasStartWithClause()
true if the query that got parsed had the START WITH clauseEclipseLink 2.6.3, "build v20160428-59c81c5" API Reference