presto-postgresql/src/main/java/io/prestosql/plugin/postgresql/PostgreSqlClient.java/PostgreSqlClient/arrayColumnMapping
class PostgreSqlClient:    private static ColumnMapping arrayColumnMapping(ConnectorSession session, ArrayType arrayType, ColumnMapping arrayElementMapping, String baseElementJdbcTypeName)
    {
        return ColumnMapping.blockMapping(
                arrayType,
                arrayReadFunction(arrayType.getElementType(), arrayElementMapping.getReadFunction()),
                arrayWriteFunction(session, arrayType.getElementType(), baseElementJdbcTypeName));
    }