more complex indexes to speedup get_ranked_posts methods

notice 30x speedups for get_ranged_posts trending/hot
no slowdown noticed for other queries
verified on DB with ~47mln of blocks

hive/db/db_state.py

@@ -107,12 +107,11 @@ class DbState:
             'hive_posts_payout_at_idx',
             'hive_posts_payout_idx',
             'hive_posts_promoted_idx',
-            'hive_posts_sc_trend_id_idx',
-            'hive_posts_sc_hot_id_idx',
+            'hive_posts_sc_trend_id_is_paidout_idx',
+            'hive_posts_sc_hot_id_is_paidout_idx',
             'hive_posts_block_num_idx',
             'hive_posts_cashout_time_id_idx',
             'hive_posts_updated_at_idx',
-            'hive_posts_is_paidout_idx',
             'hive_posts_payout_plus_pending_payout_id',
 
             'hive_votes_block_num_idx',

hive/db/schema.py

@@ -144,13 +144,12 @@ def build_metadata():
         sa.Index('hive_posts_payout_at_idx', 'payout_at'),
         sa.Index('hive_posts_payout_idx', 'payout'),
         sa.Index('hive_posts_promoted_idx', 'promoted'),
-        sa.Index('hive_posts_sc_trend_id_idx', 'sc_trend', 'id'),
-        sa.Index('hive_posts_sc_hot_id_idx', 'sc_hot', 'id'),
+        sa.Index('hive_posts_sc_trend_id_is_paidout_idx', 'sc_trend', 'id', 'is_paidout'),
+        sa.Index('hive_posts_sc_hot_id_is_paidout_idx', 'sc_hot', 'id', 'is_paidout'),
         sa.Index('hive_posts_created_at_idx', 'created_at'),
         sa.Index('hive_posts_block_num_idx', 'block_num'),
         sa.Index('hive_posts_cashout_time_id_idx', 'cashout_time', 'id'),
         sa.Index('hive_posts_updated_at_idx', sa.text('updated_at DESC')),
-        sa.Index('hive_posts_is_paidout_idx', 'is_paidout'),
         sa.Index('hive_posts_payout_plus_pending_payout_id', sa.text('(payout+pending_payout), id'))
     )