diff --git a/src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/AMapToData.java b/src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/AMapToData.java
index 683c231709e..5724509eac3 100644
--- a/src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/AMapToData.java
+++ b/src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/AMapToData.java
@@ -119,6 +119,18 @@ public void set(int n, Integer v) {
 	 */
 	public abstract void set(int n, int v);
 
+	/**
+	 * set a range of values from another map.
+	 * 
+	 * The given tm must only contain supported values, and it is not verified.
+	 * 
+	 * @param l   lower bound
+	 * @param u   upper bound (not inclusive)
+	 * @param off offset to take values from tm
+	 * @param tm  the other map to copy values from
+	 */
+	public abstract void set(int l, int u, int off, AMapToData tm);
+
 	/**
 	 * Set the index to the value and get the contained value after.
 	 * 
diff --git a/src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/MapToBit.java b/src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/MapToBit.java
index 1f37b71cbfa..9fd862bfd90 100644
--- a/src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/MapToBit.java
+++ b/src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/MapToBit.java
@@ -145,6 +145,13 @@ public void set(int n, int v) {
 			_data[wIdx] &= ~(1L << n);
 	}
 
+	@Override
+	public void set(int l, int u, int off, AMapToData tm){
+		for(int i = l; i < u; i++, off++) {
+			set(i, tm.getIndex(off));
+		}
+	}
+
 	@Override
 	public int setAndGet(int n, int v) {
 		set(n, v);
diff --git a/src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/MapToByte.java b/src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/MapToByte.java
index 413e1665176..3243f6e849a 100644
--- a/src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/MapToByte.java
+++ b/src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/MapToByte.java
@@ -95,6 +95,23 @@ public void set(int n, int v) {
 		_data[n] = (byte) v;
 	}
 
+	@Override
+	public void set(int l, int u, int off, AMapToData tm){
+		if(tm instanceof MapToByte){
+			MapToByte tbm = (MapToByte)tm;
+			byte[] tbv = tbm._data;
+			for(int i = l; i < u; i++, off++) {
+				_data[i]  =  tbv[off];
+			}
+		}
+		else{
+
+			for(int i = l; i < u; i++, off++) {
+				_data[i]  =   (byte)tm.getIndex(off);
+			}
+		}
+	}
+
 	@Override
 	public int setAndGet(int n, int v) {
 		_data[n] = (byte) v;
diff --git a/src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/MapToChar.java b/src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/MapToChar.java
index c9d5c3b19fe..50e327ba5a2 100644
--- a/src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/MapToChar.java
+++ b/src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/MapToChar.java
@@ -100,6 +100,22 @@ public void set(int n, char v) {
 		_data[n] = v;
 	}
 
+	@Override
+	public void set(int l, int u, int off, AMapToData tm) {
+		if(tm instanceof MapToChar) {
+			MapToChar tbm = (MapToChar) tm;
+			char[] tbv = tbm._data;
+			for(int i = l; i < u; i++, off++) {
+				_data[i] = tbv[off];
+			}
+		}
+		else {
+			for(int i = l; i < u; i++, off++) {
+				set(i, tm.getIndex(off));
+			}
+		}
+	}
+
 	@Override
 	public int setAndGet(int n, int v) {
 		return _data[n] = (char) v;
diff --git a/src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/MapToCharPByte.java b/src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/MapToCharPByte.java
index c3d35ef4d68..4eca0754667 100644
--- a/src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/MapToCharPByte.java
+++ b/src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/MapToCharPByte.java
@@ -101,6 +101,13 @@ public void set(int n, int v) {
 		_data_b[n] = (byte) (m >> 16);
 	}
 
+	@Override
+	public void set(int l, int u, int off, AMapToData tm){
+		for(int i = l; i < u; i++, off++) {
+			set(i, tm.getIndex(off));
+		}
+	}
+
 	@Override
 	public int setAndGet(int n, int v) {
 		int m = v & 0xffffff;
diff --git a/src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/MapToInt.java b/src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/MapToInt.java
index e514cd07bd9..0d9a5ba2697 100644
--- a/src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/MapToInt.java
+++ b/src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/MapToInt.java
@@ -91,6 +91,13 @@ public void set(int n, int v) {
 		_data[n] = v;
 	}
 
+	@Override
+	public void set(int l, int u, int off, AMapToData tm){
+		for(int i = l; i < u; i++, off++) {
+			set(i, tm.getIndex(off));
+		}
+	}
+
 	@Override
 	public int setAndGet(int n, int v) {
 		return _data[n] = v;
diff --git a/src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/MapToZero.java b/src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/MapToZero.java
index c469e407c74..b76228ca0bb 100644
--- a/src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/MapToZero.java
+++ b/src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/MapToZero.java
@@ -74,6 +74,11 @@ public void set(int n, int v) {
 		// do nothing
 	}
 
+	@Override
+	public void set(int l, int u, int off, AMapToData tm){
+		// do nothing
+	}
+
 	@Override
 	public int setAndGet(int n, int v) {
 		return 0;
diff --git a/src/main/java/org/apache/sysds/runtime/frame/data/columns/DDCArray.java b/src/main/java/org/apache/sysds/runtime/frame/data/columns/DDCArray.java
index eb3d98df5f1..7556d52978e 100644
--- a/src/main/java/org/apache/sysds/runtime/frame/data/columns/DDCArray.java
+++ b/src/main/java/org/apache/sysds/runtime/frame/data/columns/DDCArray.java
@@ -295,10 +295,7 @@ public void set(int rl, int ru, Array<T> value, int rlSrc) {
 					"\nmap1 unique: " + (map.getUnique()) + //
 					"\nmap2 unique: " + (dc.map.getUnique()));
 
-			final AMapToData tm = dc.map;
-			for(int i = rl, off = rlSrc; i <= ru; i++, off++) {
-				map.set(i, tm.getIndex(off));
-			}
+			map.set(rl, ru + 1, rlSrc, dc.map);
 		}
 		else
 			throw new DMLCompressionException("Invalid to set value in CompressedArray");