Paul Rogers created IMPALA-7805: ----------------------------------- Summary: NumericLiteral toSql() should render zero as 0, not 0-E38, 0.000, etc. Key: IMPALA-7805 URL: https://issues.apache.org/jira/browse/IMPALA-7805 Project: IMPALA Issue Type: Improvement Components: Frontend Affects Versions: Impala 3.0 Reporter: Paul Rogers Assignee: Paul Rogers
Testing of other issues revealed a somewhat bizarre aspect of how the planner expression nodes render 0. {{NumericLiteral.toSql()}} uses the Java {{BigDecimal}} class to convert a numeric value to a string for use in explained plans. The default Java behavior is to consider scale when rendering numbers, including 0. Thus, depending on precision and scale, you may get: {noformat} 0 0.0 0.00 0.000 ... 0E-38 {noformat} Mathematically, zero is zero. Unlike Java, SQL attaches no significance to the decimal point. (In Java, 0 is an integer, 0.0 is a float.) Nor does SQL attach significance to the number of zeros past the decimal point. To make testing easier, change the behavior to always emit "0" when the value is zero, regardless of precision or scale. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-all-unsubscr...@impala.apache.org For additional commands, e-mail: issues-all-h...@impala.apache.org