About char

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JPA Doc
92

DiscriminatorType.CHAR

Enum Constant javax.persistence.DiscriminatorType CHAR Single character as the discriminator type. Since: JPA 1.0
Manual
69

Database Schema Evolution

to any numeric type. In this context numeric types are: byte, short, char, int, long, float, double
Manual
69

JPA Persistable Types

: boolean, byte, short, char, int, long, float and double. Equivalent wrapper classes from package
Forum
32

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
Manual
24

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
Result
24

ObjectDB Object Database Features

fields) Primitive types (boolean, byte, short, char, int, long, float, double). Wrapper types (Boolean ... @Id fields or a @EmbeddedId field. Primary Key Data Types Primitives (boolean, byte, short, char
Manual
17

Comparison in JPQL and Criteria API

, char, int, long, float, double), wrapper types (Byte, Short, Character, Integer, Long, Float, Double
Manual
17

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
17

Index Definition

a value of one of the following persistable types: Primitive types: boolean, byte, short, char, int, long
Manual
17

JPA Primary Key

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