commit 3cb78b8: [Minor] Clickhouse: Add comment safety operator

[Vsevolod Stakhov]

Author: Vsevolod Stakhov
Date: 2020-09-28 12:09:16 +0100
URL: https://github.com/rspamd/rspamd/commit/3cb78b82fa940da2c1cc206c59615fc85e0fbf99 (HEAD -> master)

[Minor] Clickhouse: Add comment safety operator

---
 src/plugins/lua/clickhouse.lua | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/plugins/lua/clickhouse.lua b/src/plugins/lua/clickhouse.lua
index c38669a2c..280957008 100644
--- a/src/plugins/lua/clickhouse.lua
+++ b/src/plugins/lua/clickhouse.lua
@@ -1164,7 +1164,7 @@ local function add_extra_columns(upstream, ev_base, cfg)
       local sql = string.format('ALTER TABLE rspamd ADD COLUMN IF NOT EXISTS `%s` %s AFTER `%s`',
           col.name, col.type, prev_column)
       if col.comment then
-        sql = sql .. string.format(", COMMENT COLUMN `%s` '%s'", col.name, col.comment)
+        sql = sql .. string.format(", COMMENT COLUMN IF EXISTS `%s` '%s'", col.name, col.comment)
       end
 
       local ret = lua_clickhouse.generic(upstream, settings, ch_params, sql,