Merge pull request #464 from 4miners/427_quickfix

Fix performance of aggregateBlocksReward SQL query - Closes #427

sql/blocks.js

@@ -31,16 +31,16 @@ var BlocksSql = {
       'delegate AS (SELECT',
         '1 FROM mem_accounts m WHERE m."isDelegate" = 1 AND m."publicKey" = DECODE (${generatorPublicKey}, \'hex\') LIMIT 1),',
       'borders AS (SELECT',
-        '(SELECT CEIL(b.height / ${delegates}::float) FROM blocks b ORDER BY b.height DESC LIMIT 1) AS current,',
-        '(SELECT CEIL(b.height / ${delegates}::float) FROM blocks b',
+        '(SELECT CEIL(b.height / ${delegates}::float)::bigint FROM blocks b ORDER BY b.height DESC LIMIT 1) AS current,',
+        '(SELECT CEIL(b.height / ${delegates}::float)::bigint FROM blocks b',
           (params.start !== undefined ? ' WHERE b.timestamp >= ${start}' : ''),
           'ORDER BY b.height ASC LIMIT 1) AS min,',
-        '(SELECT CEIL(b.height / ${delegates}::float) FROM blocks b',
+        '(SELECT CEIL(b.height / ${delegates}::float)::bigint FROM blocks b',
           (params.end !== undefined ? ' WHERE b.timestamp <= ${end}' : ''),
           'ORDER BY b.height DESC LIMIT 1) AS max',
       '),',
       'r AS (SELECT DISTINCT ',
-        'CEIL(b.height / ${delegates}::float) AS round',
+        'CEIL(b.height / ${delegates}::float)::bigint AS round',
         'FROM blocks b WHERE b."generatorPublicKey" = DECODE (${generatorPublicKey}, \'hex\')),',
       're AS (SELECT r.round AS round, ((r.round-1)*${delegates})+1 AS min, r.round*${delegates} AS max',
         'FROM r WHERE r.round >= (SELECT min FROM borders) AND round <= (SELECT max FROM borders)),',