server: Simplify the light wallet transactions retrieval query

server/app/com/xsn/explorer/data/anorm/dao/TransactionPostgresDAO.scala

@@ -115,30 +115,18 @@ class TransactionPostgresDAO @Inject() (fieldOrderingSQLInterpreter: FieldOrderi
       limit: Limit)(
       implicit conn: Connection): List[Transaction] = {
 
-    /**
-     * TODO: Update query to:
-WITH CTE AS (
-  SELECT time AS lastSeenTime
-  FROM transactions
-  WHERE txid = {lastSeenTxid}
-)
-SELECT t.txid, t.blockhash, t.time, t.size
-FROM CTE CROSS JOIN transactions t
-         JOIN address_transaction_details USING (txid)
-WHERE address = {address} AND
-      (t.time < lastSeenTime OR (t.time = lastSeenTime AND t.txid > {lastSeenTxid}))
-ORDER BY time DESC
-LIMIT {limit}
-     */
     SQL(
       """
+        |WITH CTE AS (
+        |  SELECT time AS lastSeenTime
+        |  FROM transactions
+        |  WHERE txid = {lastSeenTxid}
+        |)
         |SELECT t.txid, t.blockhash, t.time, t.size
-        |FROM transactions t
+        |FROM CTE CROSS JOIN transactions t
         |         JOIN address_transaction_details USING (txid)
         |WHERE address = {address} AND
-        |      (t.time < (SELECT time AS lastSeenTime FROM transactions WHERE txid = {lastSeenTxid}) OR
-        |        (t.time = (SELECT time AS lastSeenTime FROM transactions WHERE txid = {lastSeenTxid}) AND
-        |         t.txid > {lastSeenTxid}))
+        |      (t.time < lastSeenTime OR (t.time = lastSeenTime AND t.txid > {lastSeenTxid}))
         |ORDER BY time DESC
         |LIMIT {limit}
       """.stripMargin