PhpStorm reports Unresolved reference errors for SQL statements in source code editor:
Unable to resolve column
expiry_timeInspection info: This inspection performs unresolved SQL references check
There is a MySQL schema file for the project, but I can't find how to associate this schema file with the project source.
Clicking on the red lightbulb on the left hand side enables creating a new table but can't see how to import an existing table definition.
You need to create a new Data Source in Database toolwindow and point to your database (be it dev version or maybe even a live one).
If using an actual database is not possible for whatever reason (specific environment requirements/restrictions or whatnot) but you have schema file, sill create a Data Source but point to your DDL/schema file instead.
See this page for exact steps: https://www.jetbrains.com/help/phpstorm/connecting-to-a-database.html#create_ddl_data_source