The double or float value -0.0 is now distinct from 0.0 (as in Java).

h2/src/main/org/h2/store/Data.java

@@ -528,21 +528,31 @@ public class Data {
             break;
         case Value.DOUBLE: {
             double x = v.getDouble();
-            if (x == 0.0 || x == 1.0) {
-                writeByte((byte) (DOUBLE_0_1 + x));
+            if (x == 1.0f) {
+                writeByte((byte) (DOUBLE_0_1 + 1));
             } else {
-                writeByte((byte) type);
-                writeVarLong(MathUtils.reverseLong(Double.doubleToLongBits(x)));
+                long d = Double.doubleToLongBits(x);
+                if (d == ValueDouble.ZERO_BITS) {
+                    writeByte((byte) DOUBLE_0_1);
+                } else {
+                    writeByte((byte) type);
+                    writeVarLong(MathUtils.reverseLong(d));
+                }
             }
             break;
         }
         case Value.FLOAT: {
             float x = v.getFloat();
-            if (x == 0.0f || x == 1.0f) {
-                writeByte((byte) (FLOAT_0_1 + x));
+            if (x == 1.0f) {
+                writeByte((byte) (FLOAT_0_1 + 1));
             } else {
-                writeByte((byte) type);
-                writeVarInt(MathUtils.reverseInt(Float.floatToIntBits(v.getFloat())));
+                int f = Float.floatToIntBits(x);
+                if (f == ValueFloat.ZERO_BITS) {
+                    writeByte((byte) FLOAT_0_1);
+                } else {
+                    writeByte((byte) type);
+                    writeVarInt(MathUtils.reverseInt(f));
+                }
             }
             break;
         }

h2/src/main/org/h2/value/ValueDouble.java

@@ -27,10 +27,14 @@ public class ValueDouble extends Value {
      */
     public static final int DISPLAY_SIZE = 24;
 
+    /**
+     * Double.doubleToLongBits(0.0)
+     */
+    public static final long ZERO_BITS = Double.doubleToLongBits(0.0);
+
     private static final ValueDouble ZERO = new ValueDouble(0.0);
     private static final ValueDouble ONE = new ValueDouble(1.0);
     private static final ValueDouble NAN = new ValueDouble(Double.NaN);
-    private static final long ZERO_BITS = Double.doubleToLongBits(0.0);
 
     private final double value;
 

h2/src/main/org/h2/value/ValueFloat.java

@@ -16,6 +16,11 @@ import org.h2.message.DbException;
  */
 public class ValueFloat extends Value {
 
+    /**
+     * Float.floatToIntBits(0.0F).
+     */
+    public static final int ZERO_BITS = Float.floatToIntBits(0.0F);
+
     /**
      * The precision in digits.
      */
@@ -29,7 +34,6 @@ public class ValueFloat extends Value {
 
     private static final ValueFloat ZERO = new ValueFloat(0.0F);
     private static final ValueFloat ONE = new ValueFloat(1.0F);
-    private static final int ZERO_BITS = Float.floatToIntBits(0.0F);
 
     private final float value;