caicancai commented on code in PR #3689: URL: https://github.com/apache/calcite/pull/3689#discussion_r1498514544
########## core/src/main/java/org/apache/calcite/runtime/SqlFunctions.java: ########## @@ -2788,6 +2788,18 @@ public static double log(BigDecimal d0, BigDecimal d1) { return Math.log(d0.doubleValue()) / Math.log(d1.doubleValue()); } + /** SQL {@code LOG2(number)} function applied to double values. */ + public static double log2(double d0) { + return (Double.isInfinite(log(d0, 2)) && d0 == 0.0) ? Double.NaN : log(d0, 2); + } + + /** SQL {@code LOG2(number)} function applied to + * BigDecimal and double values. */ + public static double log2(BigDecimal d0) { + return (Double.isInfinite(log(d0, 2)) && d0.doubleValue() == 0.0) ? Double.NaN : log(d0, 2); Review Comment: @mihaibudiu Maybe you are right, I would rather try to fix calcite than modify mysql, but I am not sure whether to modify the comparingResultSet method, because obviously we found a lot of problems when adapting the log2 function, and the problems are getting more and more complex. Thank you -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@calcite.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org