SQL type used in array construction depends on Dialect.

[schauder]

Postgres requires the non standard type "FLOAT8" for "DOUBLE".
This is accomplished by making the conversion dependent on the dialect.

This required a new JdbcDialect interface in order to keep the JDBC annotation out of the relational module.

Closes #1033

[LEDfan]

Hi @schauder

Thanks for taking care of this issue! I tested this branch in my project and it works for double[]. However, in the meantime I also started using float[] and this still gives an error. See this stacktrace:

Caused by: org.postgresql.util.PSQLException: Unable to find server array type for provided name REAL.
	at org.postgresql.jdbc.PgConnection.createArrayOf(PgConnection.java:1379) ~[postgresql-42.2.23.jar:42.2.23]
	at org.postgresql.jdbc.PgConnection.createArrayOf(PgConnection.java:1399) ~[postgresql-42.2.23.jar:42.2.23]
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
	at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
	at org.springframework.jdbc.core.JdbcTemplate$CloseSuppressingInvocationHandler.invoke(JdbcTemplate.java:1614) ~[spring-jdbc-5.3.9.jar:5.3.9]
	at com.sun.proxy.$Proxy45.createArrayOf(Unknown Source) ~[na:na]
	at org.springframework.data.jdbc.core.convert.DefaultJdbcTypeFactory.lambda$createArray$1(DefaultJdbcTypeFactory.java:73) ~[spring-data-jdbc-2.3.0-1033-double-array-SNAPSHOT.jar:2.3.0-1033-double-array-SNAPSHOT]
	at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:334) ~[spring-jdbc-5.3.9.jar:5.3.9]
	... 61 common frames omitted

Thanks again.

[mp911de]

That's merged and polished now.