Return Value from Comparison.compareNotNull()

h2/src/main/org/h2/expression/condition/Comparison.java

@@ -294,7 +294,7 @@ public class Comparison extends Condition {
                 return ValueNull.INSTANCE;
             }
         }
-        return ValueBoolean.get(compareNotNull(database, l, r, compareType));
+        return compareNotNull(database, l, r, compareType);
     }
 
     /**
@@ -304,11 +304,9 @@ public class Comparison extends Condition {
      * @param l the first value
      * @param r the second value
      * @param compareType the compare type
-     * @return true if the comparison indicated by the comparison type evaluates
-     *         to true
+     * @return result of comparison, either TRUE, FALSE, or NULL
      */
-    static boolean compareNotNull(Database database, Value l, Value r,
-            int compareType) {
+    static Value compareNotNull(Database database, Value l, Value r, int compareType) {
         boolean result;
         switch (compareType) {
         case EQUAL:
@@ -340,7 +338,7 @@ public class Comparison extends Condition {
         default:
             throw DbException.throwInternalError("type=" + compareType);
         }
-        return result;
+        return ValueBoolean.get(result);
     }
 
     private int getReversedCompareType(int type) {

h2/src/main/org/h2/expression/condition/ConditionIn.java

@@ -59,24 +59,22 @@ public class ConditionIn extends Condition {
                 return ConditionInParameter.getValue(database, l, e.getValue(session));
             }
         }
-        boolean result = false;
         boolean hasNull = false;
         for (int i = 0; i < size; i++) {
             Expression e = valueList.get(i);
             Value r = e.getValue(session);
-            if (r == ValueNull.INSTANCE) {
+            Value cmp;
+            if (r == ValueNull.INSTANCE
+                    || (cmp = Comparison.compareNotNull(database, l, r, Comparison.EQUAL)) == ValueNull.INSTANCE) {
                 hasNull = true;
-            } else {
-                result = Comparison.compareNotNull(database, l, r, Comparison.EQUAL);
-                if (result) {
-                    break;
+            } else if (cmp == ValueBoolean.TRUE) {
+                return cmp;
             }
         }
-        }
-        if (!result && hasNull) {
+        if (hasNull) {
             return ValueNull.INSTANCE;
         }
-        return ValueBoolean.get(result);
+        return ValueBoolean.FALSE;
     }
 
     @Override

h2/src/main/org/h2/expression/condition/ConditionInParameter.java

@@ -66,38 +66,35 @@ public class ConditionInParameter extends Condition {
     private final Parameter parameter;
 
     static Value getValue(Database database, Value l, Value value) {
-        boolean result = false;
         boolean hasNull = false;
         if (value == ValueNull.INSTANCE) {
             hasNull = true;
         } else if (value.getType() == Value.RESULT_SET) {
             for (ResultInterface ri = value.getResult(); ri.next();) {
                 Value r = ri.currentRow()[0];
-                if (r == ValueNull.INSTANCE) {
+                Value cmp;
+                if (r == ValueNull.INSTANCE
+                        || (cmp = Comparison.compareNotNull(database, l, r, Comparison.EQUAL)) == ValueNull.INSTANCE) {
                     hasNull = true;
-                } else {
-                    result = Comparison.compareNotNull(database, l, r, Comparison.EQUAL);
-                    if (result) {
-                        break;
-                    }
+                } else if (cmp == ValueBoolean.TRUE) {
+                    return cmp;
                 }
             }
         } else {
             for (Value r : ((ValueArray) value.convertTo(Value.ARRAY)).getList()) {
-                if (r == ValueNull.INSTANCE) {
+                Value cmp;
+                if (r == ValueNull.INSTANCE
+                        || (cmp = Comparison.compareNotNull(database, l, r, Comparison.EQUAL)) == ValueNull.INSTANCE) {
                     hasNull = true;
-                } else {
-                    result = Comparison.compareNotNull(database, l, r, Comparison.EQUAL);
-                    if (result) {
-                        break;
-                    }
+                } else if (cmp == ValueBoolean.TRUE) {
+                    return cmp;
                 }
             }
         }
-        if (!result && hasNull) {
+        if (hasNull) {
             return ValueNull.INSTANCE;
         }
-        return ValueBoolean.get(result);
+        return ValueBoolean.FALSE;
     }
 
     /**

h2/src/main/org/h2/expression/condition/ConditionInSelect.java

@@ -21,6 +21,7 @@ import org.h2.value.Value;
 import org.h2.value.ValueArray;
 import org.h2.value.ValueBoolean;
 import org.h2.value.ValueNull;
+import org.h2.value.ValueRow;
 
 /**
  * An 'in' condition with a subquery, as in WHERE ID IN(SELECT ...)
@@ -88,30 +89,37 @@ public class ConditionInSelect extends Condition {
     private Value getValueSlow(ResultInterface rows, Value l) {
         // this only returns the correct result if the result has at least one
         // row, and if l is not null
+        if (all) {
+            while (rows.next()) {
+                Value[] currentRow = rows.currentRow();
+                Value r = query.getColumnCount() == 1 ? currentRow[0] : ValueRow.get(currentRow);
+                Value cmp;
+                if (r == ValueNull.INSTANCE
+                        || (cmp = Comparison.compareNotNull(database, l, r, compareType)) == ValueNull.INSTANCE) {
+                    return ValueNull.INSTANCE;
+                } else if (cmp == ValueBoolean.FALSE) {
+                    return cmp;
+                }
+            }
+            return ValueBoolean.TRUE;
+        } else {
             boolean hasNull = false;
-        boolean result = all;
             while (rows.next()) {
-            boolean value;
                 Value[] currentRow = rows.currentRow();
-            Value r = query.getColumnCount() == 1 ? currentRow[0] : org.h2.value.ValueArray.get(currentRow);
-            if (r == ValueNull.INSTANCE) {
-                value = false;
+                Value r = query.getColumnCount() == 1 ? currentRow[0] : ValueRow.get(currentRow);
+                Value cmp;
+                if (r == ValueNull.INSTANCE
+                        || (cmp = Comparison.compareNotNull(database, l, r, compareType)) == ValueNull.INSTANCE) {
                     hasNull = true;
-            } else {
-                value = Comparison.compareNotNull(database, l, r, compareType);
+                } else if (cmp == ValueBoolean.TRUE) {
+                    return cmp;
                 }
-            if (!value && all) {
-                result = false;
-                break;
-            } else if (value && !all) {
-                result = true;
-                break;
             }
-        }
-        if (!result && hasNull) {
+            if (hasNull) {
                 return ValueNull.INSTANCE;
             }
-        return ValueBoolean.get(result);
+            return ValueBoolean.FALSE;
+        }
     }
 
     @Override