Changes between Version 95 and Version 96 of FAQ

Timestamp:

Feb 23, 2012, 4:06:38 PM (12 years ago)

Author:

Peter Baumann

Comment:

—

FAQ

@@ -167 +167 @@
 If I send the query ''select max_cells(c.0) from rgb as c'' via command line (rasql utility), then the result is 255 as expected; if I send this query via RasJ, then the result is -1.
 
- * Java does not have an 8-bit unsigned data type. Byte is a signed 8 bit and hence 255 is represented as -1. What you can do is to transform bytes to char by adding 2^8^ if the 2^7^ bit is set. Tested, works.
+ * Java does not have an 8-bit unsigned data type. Byte is a signed 8 bit and hence 255 is represented as -1. What you can do is to transform bytes to char by adding 2^8^ if the 2^7^ bit is set. Tested, works. Alternatively, cast to a larger data type on server side: 
+{{{
+select (long) max_cells(c.0) from rgb as c
+}}}
 
 === I get class version incompatibility error messages === 
@@ -175 +178 @@
 
 === Mixing trimming and slicing in WCPS fails ===
- * A workaround until this [ticket:64 ticket] is fixed, is to separate the two operations, e.g. instead of
+ * A workaround until [ticket:64 this ticket] is fixed is to separate the two operations, e.g. instead of
 {{{
 c[t(5),x(0:20),y(0:20)]