Uploaded image for project: 'Teiid'
  1. Teiid
  2. TEIID-5406

Allow usage of long datatype as the increment parameter in TimestampAdd function

    Details

    • Type: Enhancement
    • Status: Resolved (View Workflow)
    • Priority: Major
    • Resolution: Done
    • Affects Version/s: 10.2
    • Fix Version/s: 11.1
    • Component/s: Query Engine
    • Labels:
      None

      Description

      Currently the TIMESTAMPADD(interval, count, timestamp) expects the count parameter to be integer. This is inconsistent with the return value of the TIMSTAMPDIFF function that is long. Thus we cannot take the fraction of the count returned by TIMSTAMPDIFF and submit it to TIMESTAMPADD. Since the SQL_TSI_FRAC_SECOND difference is too large for most human values (and it's the only way to retrieve millis, even though millions of millis), we need a way to submit this data to TIMSTAMPADD.

      1. There is an inconsistency when adding 1 billion fractions of a second. Please execute the script below, one adds one billion minus one, the next one exactly 1bln fractions which results in two values, one of which is 1 fraction larger than expected:

      Select TimestampAdd(SQL_TSI_FRAC_SECOND, 999999999, Cast(CurDate() as timestamp))
      Union All
      Select TimestampAdd(SQL_TSI_FRAC_SECOND, 999999999 + 1, Cast(CurDate() as timestamp));;
      

      2. Another example:

      Begin
          Declare timestamp initialDate = CurDate();
          Declare long diff = TimestampDiff(SQL_TSI_FRAC_SECOND, initialDate, TimestampAdd(SQL_TSI_DAY, 1, initialDate));
          Declare timestamp back = TimestampAdd(SQL_TSI_FRAC_SECOND, diff, initialDate);
          select initialDate, back;
      End ;;
      

      which leads to the following error message:

      Unable to find source-code formatter for language: noformat. Available languages are: actionscript, ada, applescript, bash, c, c#, c++, cpp, css, erlang, go, groovy, haskell, html, java, javascript, js, json, lua, none, nyan, objc, perl, php, python, r, rainbow, ruby, scala, sh, sql, swift, visualbasic, xml, yaml
      2018-07-03 10:10:33,942 WARN  [org.teiid.PROCESSOR] (Worker7_QueryProcessorQueue47) 1RBg/ooz5vx7 TEIID30020 Processing exception for request 1RBg/ooz5vx7.27 'TEIID30070 The function
      'TimestampAdd(SQL_TSI_FRAC_SECOND, VARIABLES.diff, VARIABLES.initialDate)' is a valid function form, but the arguments do not match a known type signature and cannot be converted usi
      ng implicit type conversions.'. Originally QueryResolverException ResolverVisitor.java:757.: org.teiid.api.exception.query.QueryResolverException: TEIID30070 The function 'TimestampA
      dd(SQL_TSI_FRAC_SECOND, VARIABLES.diff, VARIABLES.initialDate)' is a valid function form, but the arguments do not match a known type signature and cannot be converted using implicit
       type conversions.
              at org.teiid.query.resolver.util.ResolverVisitor.resolveFunction(ResolverVisitor.java:757)
              at org.teiid.query.resolver.util.ResolverVisitor.visit(ResolverVisitor.java:392)
              at org.teiid.query.sql.symbol.Function.acceptVisitor(Function.java:169)
              at org.teiid.query.sql.navigator.AbstractNavigator.visitVisitor(AbstractNavigator.java:50)
              at org.teiid.query.sql.navigator.PreOrPostOrderNavigator.postVisitVisitor(PreOrPostOrderNavigator.java:57)
              at org.teiid.query.sql.navigator.PreOrPostOrderNavigator.visit(PreOrPostOrderNavigator.java:194)
              at org.teiid.query.sql.symbol.Function.acceptVisitor(Function.java:169)
              at org.teiid.query.resolver.util.ResolverVisitor.resolveLanguageObject(ResolverVisitor.java:1456)
              at org.teiid.query.resolver.command.UpdateProcedureResolver.resolveStatement(UpdateProcedureResolver.java:234)
              at org.teiid.query.resolver.command.UpdateProcedureResolver.resolveBlock(UpdateProcedureResolver.java:127)
              at org.teiid.query.resolver.command.UpdateProcedureResolver.resolveCommand(UpdateProcedureResolver.java:110)
              at org.teiid.query.resolver.QueryResolver.resolveCommand(QueryResolver.java:282)
              at org.teiid.query.resolver.QueryResolver.resolveCommand(QueryResolver.java:128)
              at org.teiid.dqp.internal.process.Request.resolveCommand(Request.java:282)
              at org.teiid.dqp.internal.process.Request.generatePlan(Request.java:418)
              at org.teiid.dqp.internal.process.Request.processRequest(Request.java:486)
              at org.teiid.dqp.internal.process.RequestWorkItem.processNew(RequestWorkItem.java:660)
              at org.teiid.dqp.internal.process.RequestWorkItem.process(RequestWorkItem.java:339)
              at org.teiid.dqp.internal.process.AbstractWorkItem.run(AbstractWorkItem.java:47)
              at org.teiid.dqp.internal.process.RequestWorkItem.run(RequestWorkItem.java:276)
              at org.teiid.dqp.internal.process.DQPWorkContext.runInContext(DQPWorkContext.java:277)
              at org.teiid.dqp.internal.process.ThreadReuseExecutor$RunnableWrapper.run(ThreadReuseExecutor.java:115)
              at org.teiid.dqp.internal.process.ThreadReuseExecutor$3.run(ThreadReuseExecutor.java:206)
              at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
              at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
              at java.lang.Thread.run(Thread.java:745)
      

        Gliffy Diagrams

          Attachments

            Activity

              People

              • Assignee:
                shawkins Steven Hawkins
                Reporter:
                dalex005 Dmitrii Pogorelov
              • Votes:
                0 Vote for this issue
                Watchers:
                2 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: