About char

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JPA Doc
111

DiscriminatorType.CHAR

Enum Constant javax.persistence.DiscriminatorType CHAR Single character as the discriminator type. Since: JPA 1.0
Manual
83

Database Schema Evolution

to any numeric type. In this context numeric types are: byte, short, char, int, long, float, double
Manual
83

JPA Persistable Types

: boolean, byte, short, char, int, long, float and double. Equivalent wrapper classes from package
Forum
38

substring works with string but not with char

with a string parameter select f from Foo f where substring(f.name, 1, 1) = ?1 but when i use a char, the query does not return anything. i think it should also be possible to use char/Character types ... Java char is comparable to int but not to String. Maybe an exception has to be thrown on attempt
Result
31

ObjectDB Object Database Features

(boolean, byte, short, char, int, long, float, double). Wrapper types (Boolean, Byte, Short, Character ... a @EmbeddedId field. Primary Key Data Types Primitives (boolean, byte, short, char, int, long, float
Manual
31

Strings in JPQL and Criteria Queries

to 'germany'. TRIM - Stripping Leading and Trailing Characters The TRIM([[LEADING|TRAILING|BOTH] [char ... ); Expression upper = cb.upper(param); // TRIM([[LEADING|TRAILING|BOTH] [char] FROM] str
Manual
21

Comparison in JPQL and Criteria API

, char, int, long, float, double), wrapper types (Byte, Short, Character, Integer, Long, Float, Double
Manual
21

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
Manual
21

Index Definition

a value of one of the following persistable types: Primitive types: boolean, byte, short, char, int, long
Manual
21

JPA Primary Key

: boolean, byte, short, char, int, long, float, double. Equivalent wrapper classes from package java