mkrasilnikova commented on pull request #31964:
URL: https://github.com/apache/spark/pull/31964#issuecomment-1011260250
Hello! It seems that there is a bug connected with this pull request.
We use two tables in postgresql with fields named in Russian. And when we
are trying to join them with query like
"select view1.`Имя1` , view1.`Имя2`, view2.`Имя3` from view1 left join
view2 on view1.`Имя2`=view2.`Имя4`"
we are getting an error
Caused by: org.postgresql.util.PSQLException: ОШИБКА: столбец "`Имя4`" не
существует
Hint: Возможно, предполагалась ссылка на столбец "tab2.Имя4".
Position: 49
at
org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2657)
at
org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2347)
at
org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:337)
at org.postgresql.jdbc.PgStatement.executeInternal(PgStatement.java:484)
at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:404)
at
org.postgresql.jdbc.PgPreparedStatement.executeWithFlags(PgPreparedStatement.java:162)
at
org.postgresql.jdbc.PgPreparedStatement.executeQuery(PgPreparedStatement.java:114)
at
org.apache.spark.sql.execution.datasources.jdbc.JDBCRDD.compute(JDBCRDD.scala:362)
It says that there is no field "`Имя4`" and offers "tab2.Имя4" instead.
There are no problems with english names.
As far as I can understand to get the data from the second table it
constructs query
SELECT "Имя3","Имя4" FROM "public"."tab2" WHERE ("`Имя4`" IS NOT NULL) ,
and these redundant quotes in WHERE clause are added in method quoteIfNeeded.
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