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java.lang.AssertionError at org.eigenbase.sql.validate.SqlValidatorUtil.lookup(SqlValidatorUtil.java:242)[optiq-core-0.9-drill-r3.jar:na] at org.eigenbase.sql.SqlIdentifier.getMonotonicity(SqlIdentifier.java:261)[optiq-core-0.9-drill-r3.jar:na] at org.eigenbase.sql.validate.SelectScope.getMonotonicity(SelectScope.java:149)[optiq-core-0.9-drill-r3.jar:na] at org.eigenbase.sql.SqlWindow.isTableSorted(SqlWindow.java:340)[optiq-core-0.9-drill-r3.jar:na] at org.eigenbase.sql.SqlWindow.validate(SqlWindow.java:561)[optiq-core-0.9-drill-r3.jar:na]