About regular expression

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nullif(x, y)

Method javax.persistence.criteria.CriteriaBuilder Expression nullif(   Expression x,   Expression y ) Create an expression that tests whether its argument are equal, returning null if they are and the value of the first expression if they are not. Parameters: x - expression y - expression Returns: nullif expression Since: JPA 2.0
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2

coalesce(x, y)

Method javax.persistence.criteria.CriteriaBuilder Expression coalesce(   Expression x,   Expression y ) Create an expression that returns null if all its arguments evaluate to null, and the value of the first non-null argument otherwise. Parameters: x - expression y - expression Returns: coalesce expression Since: JPA 2.0
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2

coalesce(x, y)

Method javax.persistence.criteria.CriteriaBuilder Expression coalesce(   Expression x,   Expression y ) Create an expression that returns null if all its arguments evaluate to null, and the value of the first non-null argument otherwise. Parameters: x - expression y - expression Returns: coalesce expression Since: JPA 2.0
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2

concat(x, y)

Method javax.persistence.criteria.CriteriaBuilder Expression concat(   Expression x,   Expression y ) Create an expression for string concatenation. Parameters: x - string expression y - string expression Returns: expression corresponding to concatenation Since: JPA 2.0
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2

concat(x, y)

Method javax.persistence.criteria.CriteriaBuilder Expression concat(   Expression x,   Expression y ) Create an expression for string concatenation. Parameters: x - string expression y - string expression Returns: expression corresponding to concatenation Since: JPA 2.0
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2

like(x, pattern, escapeChar)

Method javax.persistence.criteria.CriteriaBuilder Predicate like(   Expression x,   Expression pattern,   Expression escapeChar ) Create a predicate for testing whether the expression satisfies the given pattern. Parameters: x - string expression pattern - string
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locate(x, pattern)

Method javax.persistence.criteria.CriteriaBuilder Expression locate(   Expression x,   Expression pattern ) Create expression to locate the position of one string ... . If the string to be located is not found, 0 is returned. Parameters: x - expression for string
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2

notLike(x, pattern, escapeChar)

Method javax.persistence.criteria.CriteriaBuilder Predicate notLike(   Expression x,   Expression pattern,   Expression escapeChar ) Create a predicate for testing whether the expression does not satisfy the given pattern. Parameters: x - string expression pattern
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2

substring(x, from)

Method javax.persistence.criteria.CriteriaBuilder Expression substring(   Expression x,   Expression from ) Create an expression for substring extraction. Extracts ... : x - string expression from - start position expression Returns: expression corresponding to substring extraction Since: JPA 2.0
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2

trim(t, x)

Method javax.persistence.criteria.CriteriaBuilder Expression trim(   Expression t,   Expression x ) Create expression to trim character from both ends of a string. Parameters: t - expression for character to be trimmed x - expression for string to trim Returns: trim expression Since: JPA 2.0