如何修复AssertionError：断言失败：不安全的符号在运行时反射Universe中不稳定（<none>的子代）

Question

I am trying to filter a dataframe like below

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 val industry_df = industry_df0.filter( col("classification_type").===("GICS") )

'

Me getting error

java.lang.AssertionError: assertion failed: unsafe symbol Unstable (child of <none>) in runtime reflection universe
    at scala.reflect.internal.Symbols$Symbol.<init>(Symbols.scala:205)
    at scala.reflect.internal.Symbols$TypeSymbol.<init>(Symbols.scala:3030)
    at scala.reflect.internal.Symbols$ClassSymbol.<init>(Symbols.scala:3222)

1）我在这里做错了什么？如何解决？

2）当我尝试执行$（“ classification_type”）。===（“” GICS“）

I am getting $ not found error , what should I include to use $ on dataframe.

3）我正在尝试将连接查询与spark-sql一起使用，但不起作用，如何调试它？当然，此查询LOGIC适用于oracle db。

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 val result_df =  sparkSession.sql("""
             select a.company_id, a.data_date, a.model_id, b.domicile_country_code, d.two_digit_iso_code, d.capiq_geo_name  
               from model_lnk a join company_filter_vals b on a.company_id=b.company_id 
               join reg_lnk c 
               join country d on c.ctry_geo_code=d.geo_code
               where  a.model_id in (3020,3030)
               and b.model_group_id in (select model_group_id from model where model_id in (3020,3030))
           """  )

         result_df.show(2)

'