2 files changed, 14 insertions, 5 deletions
diff --git a/src/java/com/healthmarketscience/jackcess/Column.java b/src/java/com/healthmarketscience/jackcess/Column.java
index 2e61b46..32b0e71 100644
--- a/src/java/com/healthmarketscience/jackcess/Column.java
+++ b/src/java/com/healthmarketscience/jackcess/Column.java
@@ -79,12 +79,12 @@ public class Column implements Comparable<Column> {
    */
   private static final short LONG_VALUE_TYPE_OTHER_PAGES = (short) 0x0;
 
-  private static final Pattern GUID_PATTERN = Pattern.compile("\\s*[{]([\\p{XDigit}]{4})-([\\p{XDigit}]{2})-([\\p{XDigit}]{2})-([\\p{XDigit}]{2})-([\\p{XDigit}]{6})[}]\\s*");
+  private static final Pattern GUID_PATTERN = Pattern.compile("\\s*[{]([\\p{XDigit}]{8})-([\\p{XDigit}]{4})-([\\p{XDigit}]{4})-([\\p{XDigit}]{4})-([\\p{XDigit}]{12})[}]\\s*");
 
   /** default precision value for new numeric columns */
   public static final byte DEFAULT_PRECISION = 18;
   /** default scale value for new numeric columns */
-  public static final byte DEFAULT_SCALE = 18;
+  public static final byte DEFAULT_SCALE = 0;
   
   /** For text columns, whether or not they are compressed */ 
   private boolean _compressedUnicode = false;
@@ -812,8 +812,12 @@ public class Column implements Comparable<Column> {
       return BigDecimal.ZERO;
     } else if(value instanceof BigDecimal) {
       return (BigDecimal)value;
-    } else {
+    } else if(value instanceof BigInteger) {
+      return new BigDecimal((BigInteger)value);
+    } else if(value instanceof Number) {
       return new BigDecimal(((Number)value).doubleValue());
+    } else {
+      return new BigDecimal(value.toString());
     }
   }
 
diff --git a/src/java/com/healthmarketscience/jackcess/Database.java b/src/java/com/healthmarketscience/jackcess/Database.java
index 93e8a83..5635ed6 100644
--- a/src/java/com/healthmarketscience/jackcess/Database.java
+++ b/src/java/com/healthmarketscience/jackcess/Database.java
@@ -409,8 +409,13 @@ public class Database {
         buffer.putShort((short) 0);
       }
       buffer.putShort(columnNumber); //Column Number again
-      buffer.put((byte) 0x09);  //Unknown
-      buffer.put((byte) 0x04);  //Unknown
+      if(col.getType() == DataType.NUMERIC) {
+        buffer.put((byte) col.getPrecision());  // numeric precision
+        buffer.put((byte) col.getScale());  // numeric scale
+      } else {
+        buffer.put((byte) 0x00); //unused
+        buffer.put((byte) 0x00); //unused
+      }
       buffer.putShort((short) 0); //Unknown
       if (col.getType().isVariableLength()) { //Variable length
         buffer.put((byte) 0x2);