Regression for creating float8 arrays

[beikov]

Describe the issue
The change in #1986 leads to a problem in Hibernate ORM when working with array types. So far, the type float was interpreted as float8, but after this change it will be interpreted as float4.

Driver Version? 42.4.1
Java Version? 11
OS Version? -
PostgreSQL Version? -
To Reproduce

Do Connection.createArray("float", new Double[]{})

Expected behaviour

The PG type is _float8, but actually is _float4

[davecramer]

@bokken thoughts ?

[bokken]

Based on https://www.postgresql.org/docs/current/datatype-numeric.html#id-1.5.7.9.8.16:
float with no precision specified is taken to mean double precision.

The javadoc for createArray states:
typeName - the SQL name of the type the elements of the array map to. The typeName is a database-specific name which may be the name of a built-in type, a user-defined type or a standard SQL type supported by this database.

So I think taking those 2 together, that float should be reverted to alias float8.

[davecramer]

I've released 42.5.0 which fixes this see #2598