Here is a patch for DatabaseMetaData to show precision properly. It is
from Mark Lillywhite. I am adding to the patch queue.
--
Bruce Momjian | http://candle.pha.pa.us
pgman@candle.pha.pa.us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026
Index: org/postgresql/jdbc2/DatabaseMetaData.java
===================================================================
RCS file: /cvs/pgjdbc71/org/postgresql/jdbc2/DatabaseMetaData.java,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -r1.1 -r1.2
--- org/postgresql/jdbc2/DatabaseMetaData.java 2001/10/04 05:01:32 1.1
+++ org/postgresql/jdbc2/DatabaseMetaData.java 2001/10/23 09:44:30 1.2
@@ -1932,7 +1932,19 @@
tuple[7] = null; // Buffer length
- tuple[8] = "0".getBytes(); // Decimal Digits - how to get this?
+ // Decimal digits = scale
+ // From the source (see e.g. backend/utils/adt/numeric.c,
+ // function numeric()) the scale and precision can be calculated
+ // from the typmod value. mark@plasticsoftware.com.au
+ if (typname.equals("numeric") || typname.equals("decimal"))
+ {
+ int attypmod = r.getInt(8);
+ tuple[8] =
+ Integer.toString((attypmod & 0xffff) - VARHDRSZ).getBytes();
+ }
+ else
+ tuple[8] = "0".getBytes();
+
tuple[9] = "10".getBytes(); // Num Prec Radix - assume decimal
// tuple[10] is below
