Prevent race conditions

- This is a massive cope, I don't know how to code

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

support/clickhouse/docker-entrypoint-initdb.d/0000_init.sql

@@ -23,7 +23,7 @@ CREATE TABLE IF NOT EXISTS qrust.bars (
     high Float64,
     low Float64,
     close Float64,
-    volume Int64,
+    volume Float64,
     trades Int64,
     vwap Float64
 )
@@ -31,9 +31,9 @@ ENGINE = ReplacingMergeTree()
 PRIMARY KEY (symbol, time)
 PARTITION BY toYYYYMM(time);
 
-CREATE TABLE IF NOT EXISTS qrust.bars_validity (
+CREATE TABLE IF NOT EXISTS qrust.backfills (
     symbol String,
-    time_last DateTime
+    time DateTime
 )
 ENGINE = ReplacingMergeTree()
 PRIMARY KEY symbol;