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# Copyright (c) 2011 Oracle. All rights reserved.
# This program and the accompanying materials are made available under the
# terms of the Eclipse Public License v1.0, which accompanies this distribution
# and is available at http://www.eclipse.org/legal/epl-v10.html.
# 
# Contributors:
#     Oracle - initial API and implementation
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# JPA 1.0 identifiers
ABS=The <b>ABS</b> function removes the minus sign from a specified numeric argument and returns the absolute value (integer, float, or double) of the same type as the argument to the function, which is always a positive number or zero.
ALL=<ul><li>An <b>ALL</b> conditional expression is a predicate that is <code>true</code> if the comparison operation is <code>true</code> for all values in the result of the subquery or the result of the subquery is empty.</li><li>An <b>ALL</b> conditional expression is <code>false</code> if the result of the comparison is <code>false</code> for at least one row, and is unknown if neither <code>true</code> nor <code>false</code>.</ul><p><p>The comparison operators used with <b>ALL</b> conditional expressions are =, <, <=, >, >=, <>.<p><p>The result of the subquery must be like that of the other argument to the comparison operator in type.
#AND
ANY=<ul><li>An <b>ANY</b> conditional expression is a predicate that is <code>true</code> if the comparison operation is <code>true</code> for some value in the result of the subquery.</li><li>An <b>ANY</b> conditional expression is <code>false</code> if the result of the subquery is empty or if the comparison operation is <code>false</code> for every value in the result of the subquery,</li><li>and is unknown if neither <code>true</code> nor <code>false</code>.</li></ul><p><p>The comparison operators used with <b>ANY</b> conditional expressions are =, <, <=, >, >=, <>.<p><p>The result of the subquery must be like that of the other argument to the comparison operator in type.
ASC=The keyword <b>ASC</b> specifies that ascending ordering be used for the associated order by item.
AVG=One of the aggregate functions. The arguments must be numeric. <b>AVG</b> returns <code>Double</code>.<p><p><b>BNF:</b> <code>expression ::= AVG([DISTINCT] state_field_path_expression)</code>
BETWEEN=Used in conditional expression to determine whether the result of an expression falls within an inclusive range of values. Numeric, string and date expression can be evaluated in this way.
BOTH=Trim from both ends.
CONCAT=The <b>CONCAT</b> function returns a string that is a concatenation of its arguments.
COUNT=One of the aggregate functions. The return type of this function is a <code>Long</code>.
CURRENT_DATE=This function returns the value of current date on the database server.
CURRENT_TIME=This function returns the value of current time on the database server.
CURRENT_TIMESTAMP=This function returns the value of current timestamp on the database
DELETE_FROM=A delete statement provide bulk operations over sets of entities.
DESC=The keyword <b>DESC</b> specifies that descending ordering be used. Ascending ordering is the default.
DISTINCT=The <b>DISTINCT</b> keyword is used to specify that duplicate values must be eliminated from the query result. If <b>DISTINCT</b> is not specified, duplicate values are not eliminated.
ESCAPE=The optional <code>escape character</code> is a single-character string literal or a character-valued input parameter (i.e., char or Character) and is used to escape the special meaning of the underscore and percent characters in <code>pattern value</code>.
EXISTS=An <b>EXISTS</b> expression is a predicate that is <code>true</code> only if the result of the subquery consists of one or more values and that is <code>false</code> otherwise.
FROM=The <b>FROM</b> clause of a query defines the domain of the query by declaring identification variables. An identification variable is an identifier declared in the <b>FROM</b> clause of a query. The domain of the query may be constrained by path expressions. Identification variables designate instances of a particular entity abstract schema type. The <b>FROM</b> clause can contain multiple identification variable declarations separated by a comma (,).
GROUP_BY=The <b>GROUP BY</b> construct enables the aggregation of values according to the properties of an entity class.
HAVING=The <b>HAVING</b> construct enables conditions to be specified that further restrict the query result as restrictions upon the groups.
IN=An identification variable declared by a collection member declaration ranges over values of a collection obtained by navigation using a path expression. Such a path expression represents a navigation involving the association-fields of an entity abstract schema type. Because a path expression can be based on another path expression, the navigation can use the association-fields of related entities. An identification variable of a collection member declaration is declared using a special operator, the reserved identifier <b>IN</b>. The argument to the <b>IN</b> operator is a collection-valued path expression. The path expression evaluates to a collection type specified as a result of navigation to a collection-valued association-field of an entity abstract schema type.
IS_EMPTY=An <b>EMPTY</b> expression tests whether or not the collection designated by the collection-valued path expression is empty (i.e, has no elements).
IS_NULL=A null comparison tests whether or not the single-valued path expression or input parameter is a <b>NULL</b> value.
JOIN=A <b>JOIN</b> enables the fetching of an association as a side effect of the execution of a query. A <b>JOIN</b> is specified over an entity and its related entities.
JOIN_FETCH=A <b>JOIN FETCH</b> enables the fetching of an association as a side effect of the execution of a query. A <b>JOIN FETCH</b> is specified over an entity and its related entities.
LEADING=Trim from leading end.
LENGTH=The <b>LENGTH</b> function returns the length of the string in characters as an integer.
LIKE=The <b>LIKE</b> condition is used to specify a search for a pattern.<p><p>The <code>string_expression</code> must have a string value. The <code>pattern_value</code> is a string literal or a string-valued input parameter in which an underscore (_) stands for any single character, a percent (%) character stands for any sequence of characters (including the empty sequence), and all other characters stand for themselves. The optional <code>escape_character</code> is a single-character string literal or a character-valued input parameter (i.e., char or Character) and is used to escape the special meaning of the underscore and percent characters in <code>pattern_value</code>.
LOCATE=The <b>LOCATE</b> function returns the position of a given string within a string, starting the search at a specified position. It returns the first position at which the string was found as an integer. The first argument is the string to be located; the second argument is the string to be searched; the optional third argument is an integer that represents the string position at which the search is started (by default, the beginning of the string to be searched). The first position in a string is denoted by 1. If the string is not found, 0 is returned. The <b>LENGTH</b> function returns the length of the string in characters as an integer.
LOWER=The <b>LOWER</b> function converts a string to lower case and it returns a string.
MAX=One of the aggregate functions. The arguments must correspond to orderable state-field types (i.e., numeric types, string types, character types, or date types). The return type of this function is based on the state-field's type.
MEMBER=This expression tests whether the designated value is a member of the collection specified by the collection-valued path expression. If the collection-valued path expression designates an empty collection, the value of the <b>MEMBER OF</b> expression is <b>FALSE</b> and the value of the <b>NOT MEMBER OF</b> expression is <b>TRUE</b>. Otherwise, if the value of the collection-valued path expression or single-valued association-field path expression in the collection member expression is <b>NULL</b> or unknown, the value of the collection member expression is unknown.
MIN= One of the aggregate functions. The arguments must correspond to orderable state-field types (i.e., numeric types, string types, character types, or date types). The return type of this function is based on the state-field's type.
MOD=The modulo operation finds the remainder of division of one number by another. It takes two integer arguments and returns an integer.
NEW=In the <b>SELECT</b> clause a constructor may be used in the <b>SELECT</b> list to return one or more Java instances. The specified class is not required to be an entity or to be mapped to the database. The constructor name must be fully qualified.
OBJECT=Stand-alone identification variables in the <b>SELECT</b> clause may optionally be qualified by the <b>OBJECT</b> operator. The <b>SELECT</b> clause must not use the <b>OBJECT</b> operator to qualify path expressions.
#OR
ORDER_BY=The <b>ORDER BY</b> clause allows the objects or values that are returned by the query to be ordered.
SELECT=The <b>SELECT</b> clause determines the type of the objects or values to be selected.
SIZE=The <b>SIZE</b> function returns an integer value, the number of elements of the collection. If the collection is empty, the <b>SIZE</b> function evaluates to zero.
SOME=<ul><li>An <b>SOME</b> conditional expression is a predicate that is <code>true</code> if the comparison operation is <code>true</code> for some value in the result of the subquery.</li><li>A <b>SOME</b> conditional expression is <code>false</code> if the result of the subquery is empty or if the comparison operation is <code>false</code> for every value in the result of the subquery,</li><li>and is unknown if neither <code>true</code> nor <code>false</code>.</li></ul><p><p>The comparison operators used with <b>SOME</b> conditional expressions are =, <, <=, >, >=, <>.<p><p>The result of the subquery must be like that of the other argument to the comparison operator in type.
SQRT=The <b>SQRT</b> function takes a numeric argument and returns a double.
SUBSTRING=The second and third arguments of the <b>SUBSTRING</b> function denote the starting position and length of the substring to be returned. These arguments are integers. The first position of a string is denoted by 1. The <b>SUBSTRING</b> function returns a string.
SUM= One of the aggregate functions. The arguments must be numeric. The <b>SUM</b> function returns <code>Long</code> when applied to state-fields of integral types (other than <code>BigInteger</code>); <code>Double</code> when applied to state-fields of floating point types; <code>BigInteger</code> when applied to state-fields of type <code>BigInteger</code>; and <code>BigDecimal</code> when applied to state-fields of type <code>BigDecimal</code>. If <b>SUM</b>, <b>AVG</b>, <b>MAX</b>, or <b>MIN</b> is used, and there are no values to which the aggregate function can be applied, the result of the aggregate function is <code>NULL</code>. If <code>COUNT</code> is used, and there are no values to which <b>COUNT</b> can be applied, the result of the aggregate function is 0.
TRAILING=Trim from trailing end.
TRIM=The <b>TRIM</b> function trims the specified character from a string. If the character to be trimmed is not specified, it is assumed to be space (or blank). The optional <code>trim_character</code> is a single-character string literal or a character-valued input parameter (i.e., char or Character). If a trim specification is not provided, <b>BOTH</b> is assumed. The <b>TRIM</b> function returns the trimmed string.
UPDATE=An update statement provide bulk operations over sets of entities.
UPPER=The <b>UPPER</b> function converts a string to upper case and it returns a string.
WHERE=The <b>WHERE</b> clause of a query consists of a conditional expression used to select objects or values that satisfy the expression. The <b>WHERE</b> clause restricts the result of a select statement or the scope of an update or delete operation.

# JPA 2.0 identifiers
CASE=A <b>CASE</b> expression can include any number of any number of <b>WHEN/THEN</b> statement pairs and returns one of the values in the map or the default item, evaluating the map key expressions to decide which.
COALESCE=A <b>COALESCE</b> expression returns <code>null</code> if all its arguments evaluate to <code>null</code>, and the value of the first non-<code>null</code> argument otherwise.<p><p>The return type is the type returned by the arguments if they are all of the same type, otherwise it is undetermined.
ENTRY=Use <b>ENTRY</b> in the <b>FROM</b> clause of a <b>MAP</b>. 
INDEX=The <b>INDEX</b> function returns an integer value corresponding to the position of its argument in an ordered list. The <b>INDEX</b> function can only be applied to identification variables denoting types for which an order column has been specified.
KEY=Use <b>KEY</b> in the <b>SELECT</b> clause or the <b>WHERE</b> clause of a <b>MAP</b>. 
NULLIF=<b>NULLIF</b> returns the first expression if the two expressions are not equal. If the expressions are equal, <b>NULLIF</b> returns a null value of the type of the first expression.<p><p><b>NULLIF</b> is equivalent to a searched <b>CASE</b> expression in which the two expressions are equal and the resulting expression is <b>NULL</b>.<p><p>Returns the same type as the first expression.
TYPE=An entity type expression can be used to restrict query polymorphism. The <b>TYPE</b> operator returns the exact type of the argument.
VALUE=Use <b>VALUE</b> in the <b>SELECT</b> clause or the <b>WHERE</b> clause of a <b>MAP</b>. 

# EclipseLink identifiers
FUNC=Use <b>FUNC</b> for direct, native database functions.
TREAT=<b>TREAT</b> downcasts child classes in inheritance hierarchy.

# Reserved JPQL identifiers
BIT_LENGTH=The identifier <b>BIT_LENGTH</b> is not currently used: it is reserved for future use.
CHAR_LENGTH=The identifier <b>CHAR_LENGTH</b> is not currently used: it is reserved for future use.
CHARACTER_LENGTH=The identifier <b>CHARACTER_LENGTH</b> is not currently used: it is reserved for future use.
CLASS=The identifier <b>CLASS</b> is not currently used: it is reserved for future use.
POSITION=The identifier <b>POSITION</b> is not currently used: it is reserved for future use.
UNKNOWN=The identifier <b>UNKNOWN</b> is not currently used: it is reserved for future use.