My apologies, Hive ML wasn't obviously the right target! Best regards, Alessandro
On Fri, 27 Jan 2023 at 18:35, Alessandro Solimando < alessandro.solima...@gmail.com> wrote: > Hello everyone, > while checking CI logs I have noticed that we have lots of JavaCC warnings > related to ambiguous prefixes in the productions of one of our grammars. > > They also seem related to time functions, for which I have seen several > related developments for BigQuery lately. > > Have we verified that our grammar is still behaving properly under this > situation? Have we considered increasing the lookahead value as suggested? > Shall we open a Jira ticket to have a closer look? > > Here is an example of CI logs showing the problem (although it is > reproducible locally): > https://ci-builds.apache.org/job/Calcite/job/Calcite-sonar/job/main/18/consoleFull > > > In what follows the extract that is relevant to the discussion at hand: > >> > Task :core:javaCCMain >> Java Compiler Compiler Version 4.0 (Parser Generator) >> (type "javacc" with no arguments for help) >> Reading from file >> /home/jenkins/jenkins-agent/workspace/Calcite_Calcite-sonar_main/core/build/fmpp/fmppMain/javacc/Parser.jj >> . . . >> Warning: Output directory >> "/home/jenkins/jenkins-agent/workspace/Calcite_Calcite-sonar_main/core/build/javacc/javaCCMain/org/apache/calcite/sql/parser/impl" >> does not exist. Creating the directory. >> Note: UNICODE_INPUT option is specified. Please make sure you create the >> parser/lexer using a Reader with the correct character encoding. >> Warning: Choice conflict involving two expansions at >> line 4930, column 5 and line 4956, column 5 respectively. >> A common prefix is: "MICROSECOND" >> Consider using a lookahead of 2 for earlier expansion. >> Warning: Choice conflict involving two expansions at >> line 4931, column 5 and line 4956, column 5 respectively. >> A common prefix is: "MILLISECOND" >> Consider using a lookahead of 2 for earlier expansion. >> Warning: Choice conflict involving two expansions at >> line 4936, column 5 and line 4956, column 5 respectively. >> A common prefix is: "DOW" >> Consider using a lookahead of 2 for earlier expansion. >> Warning: Choice conflict involving two expansions at >> line 4937, column 5 and line 4956, column 5 respectively. >> A common prefix is: "DOY" >> Consider using a lookahead of 2 for earlier expansion. >> Warning: Choice conflict involving two expansions at >> line 4938, column 5 and line 4956, column 5 respectively. >> A common prefix is: "ISODOW" >> Consider using a lookahead of 2 for earlier expansion. >> Warning: Choice conflict involving two expansions at >> line 4939, column 5 and line 4956, column 5 respectively. >> A common prefix is: "ISOYEAR" >> Consider using a lookahead of 2 for earlier expansion. >> Warning: Choice conflict involving two expansions at >> line 4940, column 5 and line 4956, column 5 respectively. >> A common prefix is: "WEEK" >> Consider using a lookahead of 2 for earlier expansion. >> Warning: Choice conflict involving two expansions at >> line 4950, column 5 and line 4956, column 5 respectively. >> A common prefix is: "QUARTER" >> Consider using a lookahead of 2 for earlier expansion. >> Warning: Choice conflict involving two expansions at >> line 4952, column 5 and line 4956, column 5 respectively. >> A common prefix is: "EPOCH" >> Consider using a lookahead of 2 for earlier expansion. >> Warning: Choice conflict involving two expansions at >> line 4953, column 5 and line 4956, column 5 respectively. >> A common prefix is: "DECADE" >> Consider using a lookahead of 2 for earlier expansion. >> Warning: Choice conflict involving two expansions at >> line 4954, column 5 and line 4956, column 5 respectively. >> A common prefix is: "CENTURY" >> Consider using a lookahead of 2 for earlier expansion. >> Warning: Choice conflict involving two expansions at >> line 4955, column 5 and line 4956, column 5 respectively. >> A common prefix is: "MILLENNIUM" >> Consider using a lookahead of 2 for earlier expansion. >> Warning: Choice conflict involving two expansions at >> line 6549, column 9 and line 6551, column 9 respectively. >> A common prefix is: "WEEK" "(" >> Consider using a lookahead of 3 or more for earlier expansion. >> File "TokenMgrError.java" does not exist. Will create one. >> File "ParseException.java" does not exist. Will create one. >> File "Token.java" does not exist. Will create one. >> File "SimpleCharStream.java" does not exist. Will create one. >> Parser generated with 0 errors and 14 warnings. > > > Best regards, > Alessandro >
