title: Sqldelight and Postgres Column Adapter for Timestamp
body: <p>Using this</p>
  <pre><code>  createdAt TIMESTAMP AS LocalDateTime NOT NULL,
  
  </code></pre>
  <p>compiles but the Adapter never converts from localdatetime to TIMESTAMP in postgres. Instead I receive</p>
  <pre><code>Exception in thread &quot;AWT-EventQueue-0&quot; org.postgresql.util.PSQLException: ERROR: column &quot;createdat&quot; is of type timestamp without time zone but expression is of type character varying
    Hint: You will need to rewrite or cast the expression.
  </code></pre>
  <p>I think this is a bug but I am asking here first to see if anybody has any ideas before submitting a bug report on github. Thanks.</p>
  <pre><code>
     val localDatetimeColumnAdapter = object : ColumnAdapter&lt;LocalDateTime,String&gt; {
                  override fun decode(databaseValue: String) =
              LocalDateTime.parse(databaseValue)
          override fun encode(value: LocalDateTime) = value.toString()
  
  
  kotlin_version = 1.3.41
  sqldelight_version = 1.5.0
  hikari_cp_version = 4.0.3
  postgresql_version = 42.2.20
  </code></pre>