Spark JDBC requires support for column-name-free INSERT syntax

Spark JDBC write only works with technologies which support the following INSERT statement syntax (JdbcUtils.scala: insertStatement()):

INSERT INTO $table VALUES ( ?, ?, ..., ? )

Some technologies require a list of column names:

INSERT INTO $table ( $colNameList ) VALUES ( ?, ?, ..., ? )

Therefore technologies like Progress JDBC Driver for Cassandra do not work with Spark JDBC write.

Idea for fix:
Move JdbcUtils.scala:insertStatement() into SqlDialect and add a SqlDialect for Progress JDBC Driver for Cassandra