there is no "parent_id" column in action table.

[newbieh4cker]

according to latest commit of sql_db_plugin(https://github.com/EOSIO/eos/blob/6a2014aaac65bbd8d40459c44976d6e7c77eaa21/plugins/sql_db_plugin/db/actions_table.cpp#L32) there is no 'parent_Id' column in 'action' table but 'parent'

but since EOSTracker-API commit from "Jul 15, 2018 / commit id : 6a12125" api uses "parent_Id" columns.