public final class ExtractExpression extends AbstractSingleEncapsulatedExpression
YEAR
, MONTH
, DAY
, HOUR
, MINUTE
,
SECOND
. Some databases may support other parts.
extract_expression ::= EXTRACT(date_part_literal [FROM] scalar_expression)
date_part_literal ::= { MICROSECOND | SECOND | MINUTE | HOUR | DAY | WEEK | MONTH | QUARTER | YEAR | SECOND_MICROSECOND | MINUTE_MICROSECOND | MINUTE_SECOND | HOUR_MICROSECOND | HOUR_SECOND | HOUR_MINUTE | DAY_MICROSECOND | DAY_SECOND | DAY_MINUTE | DAY_HOUR | YEAR_MONTH, etc }
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
Constructor and Description |
---|
ExtractExpression(AbstractExpression parent)
Creates a new
ExtractExpression . |
Modifier and Type | Method and Description |
---|---|
void |
accept(ExpressionVisitor visitor)
Visits this
Expression by the given visitor . |
java.lang.String |
getActualFromIdentifier()
Returns the actual FROM identifier found in the string representation of the JPQL
query, which has the actual case that was used.
|
java.lang.String |
getDatePart()
Returns the date part that was parsed, it is used to extract a single part of a date/time,
such as year, month, day, your, etc.
|
java.lang.String |
getEncapsulatedExpressionQueryBNFId()
Returns the BNF used to parse the encapsulated expression.
|
JPQLQueryBNF |
getQueryBNF()
Returns the BNF of this
Expression . |
boolean |
hasDatePart()
Determines whether the date part literal was parsed or not.
|
boolean |
hasEncapsulatedExpression()
Determines whether something was parsed after the left parenthesis.
|
boolean |
hasFrom()
Determines whether the identifier FROM was part of the query.
|
boolean |
hasSpaceAfterDatePart()
Determines whether a whitespace was found after the date part literal.
|
boolean |
hasSpaceAfterFrom()
Determines whether a whitespace was found after FROM.
|
acceptChildren, findQueryBNF, getExpression, hasExpression, setExpression
getActualIdentifier, getIdentifier, hasLeftParenthesis, hasRightParenthesis, hasSpaceAfterIdentifier
children, getGrammar, getIdentifierVersion, getLength, getOffset, getParent, getQueryBNF, getRoot, isAncestor, orderedChildren, populatePosition, toActualText, toParsedText, toString
public ExtractExpression(AbstractExpression parent)
ExtractExpression
.parent
- The parent of this expressionpublic void accept(ExpressionVisitor visitor)
Expression
by the given visitor
.visitor
- The ExpressionVisitor
to visit this objectpublic java.lang.String getEncapsulatedExpressionQueryBNFId()
getEncapsulatedExpressionQueryBNFId
in class AbstractSingleEncapsulatedExpression
public java.lang.String getActualFromIdentifier()
public java.lang.String getDatePart()
public JPQLQueryBNF getQueryBNF()
Expression
.JPQLQueryBNF
, which represents the grammar of this Expression
public boolean hasDatePart()
true
if the date part literal was parsed; false
otherwisepublic boolean hasEncapsulatedExpression()
hasEncapsulatedExpression
in class AbstractSingleEncapsulatedExpression
true
if something was parsed; false
otherwisepublic boolean hasFrom()
true
if the identifier FROM was parsed; false
otherwisepublic boolean hasSpaceAfterDatePart()
true
if there was a whitespace after the date part literal;
false
otherwisepublic boolean hasSpaceAfterFrom()
true
if there was a whitespace after FROM; false
otherwiseEclipseLink 2.6.3, "build v20160428-59c81c5" API Reference