problems w/ column names beginning with '_' (underscore) w/ apache derby database --------------------------------------------------------------------------------- Key: HIBERNATE-54 URL: https://issues.jboss.org/browse/HIBERNATE-54 Project: Hibernate Integration Issue Type: Bug Environment: windows xp, java 1.5.0_09, eclispe 3.2.1, hibernate 3.2.1, derby 10.2.2.0, hibernate tools 3.2 beta8 Reporter: bugra uytun Assignee: Steve Ebersole derby has problems with column names beginning with underscore, see also http://db.apache.org/derby/docs/10.1/ref/crefsqlj1003454.html therefore such column names should be between double quotation marks (notice that double quotation marks also sets the case sensitivity on column names.) but hibernate translates a HQL statement like this "from table1 t where t.id = '1'" to something like: select table1_.id as id4, table1_._colname1 as column27_4_ schema1.table1 table1_ where table1_.id = '1' but because of the columns that are beginning with an underscore the translation should be: select table1_."id" as id4, table1_."_colname1" as column27_4_ schema1."table1" table1_ where table1_."id" = '1' the errors i got are: DEBUG [JDBCExceptionReporter]: could not execute query [<translated sql statement>] ERROR 42X01: Syntax error: Encountered "_" at line 1, column 987. at org.apache.derby.iapi.error.StandardException.newException(Unknown Source) at org.apache.derby.impl.sql.compile.ParserImpl.parseStatement(Unknown Source) at org.apache.derby.impl.sql.GenericStatement.prepMinion(Unknown Source) at org.apache.derby.impl.sql.GenericStatement.prepare(Unknown Source) at org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.prepareInternalStatement(Unknown Source) at org.apache.derby.impl.jdbc.EmbedPreparedStatement.<init>(Unknown Source) at org.apache.derby.impl.jdbc.EmbedPreparedStatement20.<init>(Unknown Source) at org.apache.derby.impl.jdbc.EmbedPreparedStatement30.<init>(Unknown Source) at org.apache.derby.jdbc.Driver30.newEmbedPreparedStatement(Unknown Source) at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown Source) at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown Source) at org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:497) at org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:415) at org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement(AbstractBatcher.java:139) at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1538) at org.hibernate.loader.Loader.doQuery(Loader.java:661) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224) at org.hibernate.loader.Loader.doList(Loader.java:2211) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2095) at org.hibernate.loader.Loader.list(Loader.java:2090) at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:388) at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:338) at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:172) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1121) at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79) at <mypackage>.MyHibernate.main(MyHibernate.java:13) WARN main org.hibernate.util.JDBCExceptionReporter - SQL Error: 20000, SQLState: 42X01 ERROR main org.hibernate.util.JDBCExceptionReporter - Syntax error: Encountered "_" at line 1, column 987.