Touches up get_channel function & minor touchup to query

schema/comments_ddl.sql

@@ -38,8 +38,9 @@ CREATE TABLE IF NOT EXISTS CHANNEL(
 -- DROP INDEX IF EXISTS COMMENT_CLAIM_INDEX;
 CREATE INDEX IF NOT EXISTS CLAIM_COMMENT_INDEX ON COMMENT (LbryClaimId, CommentId);
 
-CREATE INDEX IF NOT EXISTS CHANNEL_COMMENT_INDEX ON COMMENT (ChannelId, CommentId);
-
+DROP INDEX CHANNEL_COMMENT_INDEX;
+CREATE INDEX IF NOT EXISTS CHANNEL_COMMENT_INDEX ON COMMENT(ChannelId, CommentId)
+;
 
 -- VIEWS
 DROP VIEW IF EXISTS COMMENTS_ON_CLAIMS;

src/database.py

@@ -170,13 +170,10 @@ def insert_channel(conn: sqlite3.Connection, channel_name: str, channel_id: str)
         )
 
 
-def get_channel_from_comment_id(conn: sqlite3.Connection, comment_id: str):
+def get_channel_id_from_comment_id(conn: sqlite3.Connection, comment_id: str):
     with conn:
         channel = conn.execute("""
-            SELECT CHN.ClaimId AS channel_id, CHN.Name AS channel_name 
-            FROM CHANNEL AS CHN, COMMENT AS CMT
-            WHERE CHN.ClaimId = CMT.ChannelId AND CMT.CommentId = ?
-            LIMIT 1
+            SELECT channel_id, channel_name FROM COMMENTS_ON_CLAIMS WHERE comment_id = ?
         """, (comment_id,)
         ).fetchone()
         return dict(channel) if channel else dict()

src/handles.py

@@ -9,7 +9,7 @@ from asyncio import coroutine
 from misc import clean_input_params
 from src.database import get_claim_comments
 from src.database import get_comments_by_id, get_comment_ids
-from src.database import get_channel_from_comment_id
+from src.database import get_channel_id_from_comment_id
 from src.database import obtain_connection
 from src.database import delete_comment_by_id
 from src.writes import create_comment_or_error
@@ -26,7 +26,7 @@ def ping(*args):
 
 def handle_get_channel_from_comment_id(app, kwargs: dict):
     with obtain_connection(app['db_path']) as conn:
-        return get_channel_from_comment_id(conn, **kwargs)
+        return get_channel_id_from_comment_id(conn, **kwargs)
 
 
 def handle_get_comment_ids(app, kwargs):