applied patch from Mark Lillywhite, patch was already applied to jdbc2, this...

applied patch from Mark Lillywhite, patch was already applied to jdbc2, this applies same fix to jdbc1 code

src/interfaces/jdbc/org/postgresql/jdbc1/DatabaseMetaData.java

@@ -13,7 +13,7 @@ import org.postgresql.util.PSQLException;
 /**
  * This class provides information about the database as a whole.
  *
- * $Id: DatabaseMetaData.java,v 1.35 2001/10/25 05:59:59 momjian Exp $
+ * $Id: DatabaseMetaData.java,v 1.36 2001/10/30 05:05:25 barry Exp $
  *
  * <p>Many of the methods here return lists of information in ResultSets.  You
  * can use the normal ResultSet methods such as getString and getInt to
@@ -2011,7 +2011,19 @@ public class DatabaseMetaData implements java.sql.DatabaseMetaData
 			}
 
 			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.
+			if (typname.equals("numeric") || typname.equals("decimal")) 
+			{ 
+			    int attypmod = r.getInt(8);
+			    tuple[8] =
+				Integer.toString((attypmod - VARHDRSZ) & 0xffff).getBytes();
+			}
+			else
+			    tuple[8] = "0".getBytes();
+
 			tuple[9] = "10".getBytes();				// Num Prec Radix - assume decimal
 			tuple[10] = Integer.toString(nullFlag.equals("f") ?
 										 java.sql.DatabaseMetaData.columnNullable :