About length

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Manual
127

Strings in JPQL and Criteria Queries

. LENGTH - Counting Characters in a String The LENGTH(str) function returns the number of characters in the argument string as an int. For example: LENGTH('United States') is evaluated to 13. LENGTH ... - Getting a Portion of a String The SUBSTRING(str, pos [, length]) function returns a substring
JDO Doc
94

Column.length

Annotation Element javax.jdo.annotations.Column int length Maximum length of data stored in this column. Returns: the maximum length of data stored in this column Default value: -1 Since: JDO 2.1
JPA Doc
94

length(x)

Method javax.persistence.criteria.CriteriaBuilder Expression length(   Expression x ) Create expression to return length of a string. Parameters: x - string expression Returns: length expression Since: JPA 2.0
JPA Doc
93

Column.length

Annotation Element javax.persistence.Column int length (Optional) The column length. (Applies only if a string-valued column is used.) Default value: 255 Since: JPA 1.0
JPA Doc
93

DiscriminatorColumn.length

Annotation Element javax.persistence.DiscriminatorColumn int length (Optional) The column length for String-based discriminator types. Ignored for other discriminator types. Default value: 31 Since: JPA 1.0
JPA Doc
93

MapKeyColumn.length

Annotation Element javax.persistence.MapKeyColumn int length (Optional) The column length. (Applies only if a string-valued column is used.) Default value: 255 Since: JPA 2.0
Manual
34

FROM clause (JPQL / Criteria API)

but cannot be one of the following reserved words: ABS, ALL, AND, ANY, AS, ASC, AVG, BETWEEN, BIT_LENGTH, BOTH, BY, CASE, CHAR_LENGTH, CHARACTER_LENGTH, CLASS, COALESCE, CONCAT, COUNT, CURRENT_DATE, CURRENT_TIME, CURRENT ... , IN, INDEX, INNER, IS, JOIN, KEY, LEADING, LEFT, LENGTH, LIKE,LOCATE, LOWER, MAX, MEMBER, MIN, MOD
Forum
32

@Column length is not working.

= true, nullable = false, length = 16) but when i m trying to insert a string for that column ... so its very difficult to validate the column string length. Please find the below project and objectdb file. ORM ... . Regarding unique, you may use @Unique. For other constraints, such as non null and length
Forum
31

Multi part paths in a composite index must have the same length

must have the same length. Therefore, the following index definition is invalid: @Entity @Index(members ... issue with enabling such an index. A composite index with components of different lengths is forbidden
Manual
30

Index Definition

for every entity. Multi part paths in a composite index must have the same length. Therefore, the following ... for executing the following query: SELECT d FROM Document d JOIN d.words w WHERE LENGTH(w) >= 10 ... of the words and is not ordered by the length of the words. The bottom line is that if there is an index