2 files changed, 31 insertions, 4 deletions
diff --git a/src/main/java/com/healthmarketscience/jackcess/ColumnBuilder.java b/src/main/java/com/healthmarketscience/jackcess/ColumnBuilder.java
index bbfca27..f013e3b 100644
--- a/src/main/java/com/healthmarketscience/jackcess/ColumnBuilder.java
+++ b/src/main/java/com/healthmarketscience/jackcess/ColumnBuilder.java
@@ -130,6 +130,17 @@ public class ColumnBuilder {
   }
 
   /**
+   * Sets the precision for the new column to the max length for the type.
+   * Does nothing for types which do not have a precision.
+   */
+  public ColumnBuilder setMaxPrecision() {
+    if(_type.getHasScalePrecision()) {
+      setPrecision(_type.getMaxPrecision());
+    }
+    return this;
+  }
+
+  /**
    * Sets the scale for the new column.
    */
   public ColumnBuilder setScale(int newScale) {
@@ -142,6 +153,17 @@ public class ColumnBuilder {
   }
 
   /**
+   * Sets the scale for the new column to the max length for the type.  Does
+   * nothing for types which do not have a scale.
+   */
+  public ColumnBuilder setMaxScale() {
+    if(_type.getHasScalePrecision()) {
+      setScale(_type.getMaxScale());
+    }
+    return this;
+  }
+
+  /**
    * Sets the length (in bytes) for the new column.
    */
   public ColumnBuilder setLength(int length) {
@@ -163,10 +185,15 @@ public class ColumnBuilder {
   }
   
   /**
-   * Sets the length for the new column to the max length for the type.
+   * Sets the length for the new column to the max length for the type.  Does
+   * nothing for types which are not variable length.
    */
   public ColumnBuilder setMaxLength() {
-    return setLength(_type.getMaxSize());
+    // length setting only makes sense for variable length columns
+    if(_type.isVariableLength()) {
+      setLength(_type.getMaxSize());
+    }
+    return this;
   }
   
   /**
diff --git a/src/main/java/com/healthmarketscience/jackcess/DataType.java b/src/main/java/com/healthmarketscience/jackcess/DataType.java
index ffd5bf4..ad6deaf 100644
--- a/src/main/java/com/healthmarketscience/jackcess/DataType.java
+++ b/src/main/java/com/healthmarketscience/jackcess/DataType.java
@@ -114,8 +114,8 @@ public enum DataType {
    * null}.  Equivalent to SQL {@link Types#VARCHAR}, {@link Types#CHAR}.
    */
   TEXT((byte) 0x0A, Types.VARCHAR, null, true, false, 0,
-       50 * JetFormat.TEXT_FIELD_UNIT_SIZE,
-       JetFormat.TEXT_FIELD_MAX_LENGTH, JetFormat.TEXT_FIELD_UNIT_SIZE),
+       JetFormat.TEXT_FIELD_MAX_LENGTH, JetFormat.TEXT_FIELD_MAX_LENGTH, 
+       JetFormat.TEXT_FIELD_UNIT_SIZE),
   /**
    * Corresponds to a java {@code byte[]} of max length 16777215 bytes.
    * Accepts a {@code byte[]}, or {@code null}.  Equivalent to SQL