Merge pull request #1611 from katzyn/row

Handle null elements in array and row values in comparison operations properly

h2/src/main/org/h2/engine/Database.java

@@ -412,8 +412,8 @@ public class Database implements DataHandler {
     }
 
     /**
-     * Compare two values with the current comparison mode. The values may not
-     * be of the same type.
+     * Compare two values with the current comparison mode. The values may have
+     * different data types including NULL.
      *
      * @param a the first value
      * @param b the second value
@@ -424,6 +424,24 @@ public class Database implements DataHandler {
         return a.compareTo(b, mode, compareMode);
     }
 
+    /**
+     * Compare two values with the current comparison mode. The values may have
+     * different data types including NULL.
+     *
+     * @param v the other value
+     * @param databaseMode the database mode
+     * @param compareMode the compare mode
+     * @param a the first value
+     * @param b the second value
+     * @param forEquality perform only check for equality (= or <>)
+     * @return 0 if both values are equal, -1 if the first value is smaller, 1
+     *         if the second value is larger, {@link Integer#MIN_VALUE} if order
+     *         is not defined due to NULL comparison
+     */
+    public int compareWithNull(Value a, Value b, boolean forEquality) {
+        return a.compareWithNull(b, forEquality, mode, compareMode);
+    }
+
     /**
      * Compare two values with the current comparison mode. The values must be
      * of the same type.

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

@@ -283,58 +283,101 @@ public class Comparison extends Condition {
             }
             return ValueBoolean.get(result);
         }
-        if (l == ValueNull.INSTANCE) {
-            if ((compareType & NULL_SAFE) == 0) {
-                return ValueNull.INSTANCE;
-            }
-        }
-        Value r = right.getValue(session);
-        if (r == ValueNull.INSTANCE) {
-            if ((compareType & NULL_SAFE) == 0) {
+        // Optimization: do not evaluate right if not necessary
+        if (l == ValueNull.INSTANCE && (compareType & NULL_SAFE) == 0) {
             return ValueNull.INSTANCE;
         }
-        }
-        return ValueBoolean.get(compareNotNull(database, l, r, compareType));
+        return compare(database, l, right.getValue(session), compareType);
     }
 
     /**
-     * Compare two values, given the values are not NULL.
+     * Compare two values.
      *
      * @param database the database
      * @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) {
-        boolean result;
+    static Value compare(Database database, Value l, Value r, int compareType) {
+        Value result;
         switch (compareType) {
-        case EQUAL:
+        case EQUAL: {
+            int cmp = database.compareWithNull(l, r, true);
+            if (cmp == 0) {
+                result = ValueBoolean.TRUE;
+            } else if (cmp == Integer.MIN_VALUE) {
+                result = ValueNull.INSTANCE;
+            } else {
+                result = ValueBoolean.FALSE;
+            }
+            break;
+        }
         case EQUAL_NULL_SAFE:
-            result = database.areEqual(l, r);
+            result = ValueBoolean.get(database.areEqual(l, r));
             break;
-        case NOT_EQUAL:
+        case NOT_EQUAL: {
+            int cmp = database.compareWithNull(l, r, true);
+            if (cmp == 0) {
+                result = ValueBoolean.FALSE;
+            } else if (cmp == Integer.MIN_VALUE) {
+                result = ValueNull.INSTANCE;
+            } else {
+                result = ValueBoolean.TRUE;
+            }
+            break;
+        }
         case NOT_EQUAL_NULL_SAFE:
-            result = !database.areEqual(l, r);
+            result = ValueBoolean.get(!database.areEqual(l, r));
             break;
-        case BIGGER_EQUAL:
-            result = database.compare(l, r) >= 0;
+        case BIGGER_EQUAL: {
+            int cmp = database.compareWithNull(l, r, false);
+            if (cmp >= 0) {
+                result = ValueBoolean.TRUE;
+            } else if (cmp == Integer.MIN_VALUE) {
+                result = ValueNull.INSTANCE;
+            } else {
+                result = ValueBoolean.FALSE;
+            }
             break;
-        case BIGGER:
-            result = database.compare(l, r) > 0;
+        }
+        case BIGGER: {
+            int cmp = database.compareWithNull(l, r, false);
+            if (cmp > 0) {
+                result = ValueBoolean.TRUE;
+            } else if (cmp == Integer.MIN_VALUE) {
+                result = ValueNull.INSTANCE;
+            } else {
+                result = ValueBoolean.FALSE;
+            }
             break;
-        case SMALLER_EQUAL:
-            result = database.compare(l, r) <= 0;
+        }
+        case SMALLER_EQUAL: {
+            int cmp = database.compareWithNull(l, r, false);
+            if (cmp == Integer.MIN_VALUE) {
+                result = ValueNull.INSTANCE;
+            } else {
+                result = ValueBoolean.get(cmp <= 0);
+            }
             break;
-        case SMALLER:
-            result = database.compare(l, r) < 0;
+        }
+        case SMALLER: {
+            int cmp = database.compareWithNull(l, r, false);
+            if (cmp == Integer.MIN_VALUE) {
+                result = ValueNull.INSTANCE;
+            } else {
+                result = ValueBoolean.get(cmp < 0);
+            }
             break;
+        }
         case SPATIAL_INTERSECTS: {
+            if (l == ValueNull.INSTANCE || r == ValueNull.INSTANCE) {
+                result = ValueNull.INSTANCE;
+            } else {
                 ValueGeometry lg = (ValueGeometry) l.convertTo(Value.GEOMETRY);
                 ValueGeometry rg = (ValueGeometry) r.convertTo(Value.GEOMETRY);
-            result = lg.intersectsBoundingBox(rg);
+                result = ValueBoolean.get(lg.intersectsBoundingBox(rg));
+            }
             break;
         }
         default:

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

@@ -49,8 +49,8 @@ public class ConditionIn extends Condition {
     @Override
     public Value getValue(Session session) {
         Value l = left.getValue(session);
-        if (l == ValueNull.INSTANCE) {
-            return l;
+        if (l.containsNull()) {
+            return ValueNull.INSTANCE;
         }
         int size = valueList.size();
         if (size == 1) {
@@ -59,24 +59,21 @@ 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 = Comparison.compare(database, l, r, Comparison.EQUAL);
+            if (cmp == 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
@@ -114,7 +111,7 @@ public class ConditionIn extends Condition {
                     ArrayList<Expression> list = new ArrayList<>(ri.getRowCount());
                     while (ri.next()) {
                         Value v = ri.currentRow()[0];
-                        if (v != ValueNull.INSTANCE) {
+                        if (!v.containsNull()) {
                             allValuesNull = false;
                         }
                         list.add(ValueExpression.get(v));
@@ -129,7 +126,7 @@ public class ConditionIn extends Condition {
         for (int i = 0; i < size; i++) {
             Expression e = valueList.get(i);
             e = e.optimize(session);
-            if (e.isConstant() && e.getValue(session) != ValueNull.INSTANCE) {
+            if (e.isConstant() && !e.getValue(session).containsNull()) {
                 allValuesNull = false;
             }
             if (allValuesConstant && !e.isConstant()) {

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

@@ -35,6 +35,7 @@ public class ConditionInConstantSet extends Condition {
     private Expression left;
     private final ArrayList<Expression> valueList;
     private final TreeSet<Value> valueSet;
+    private boolean hasNull;
     private final int type;
     private ExtTypeInfo extTypeInfo;
 
@@ -58,28 +59,33 @@ public class ConditionInConstantSet extends Condition {
         if (type == Value.ENUM) {
             extTypeInfo = ((ExpressionColumn) left).getColumn().getExtTypeInfo();
             for (Expression expression : valueList) {
-                valueSet.add(extTypeInfo.cast(expression.getValue(session)));
+                add(extTypeInfo.cast(expression.getValue(session)));
             }
         } else {
             for (Expression expression : valueList) {
-                valueSet.add(expression.getValue(session).convertTo(type, mode));
+                add(expression.getValue(session).convertTo(type, mode));
             }
         }
     }
 
+    private void add(Value v) {
+        if (v.containsNull()) {
+            hasNull = true;
+        } else {
+            valueSet.add(v);
+        }
+    }
+
     @Override
     public Value getValue(Session session) {
         Value x = left.getValue(session);
-        if (x == ValueNull.INSTANCE) {
+        if (x.containsNull()) {
             return x;
         }
         boolean result = valueSet.contains(x);
-        if (!result) {
-            boolean setHasNull = valueSet.contains(ValueNull.INSTANCE);
-            if (setHasNull) {
+        if (!result && hasNull) {
             return ValueNull.INSTANCE;
         }
-        }
         return ValueBoolean.get(result);
     }
 
@@ -168,9 +174,9 @@ public class ConditionInConstantSet extends Condition {
             if (add.isConstant()) {
                 valueList.add(add);
                 if (type == Value.ENUM) {
-                    valueSet.add(add.getValue(session).convertToEnum(extTypeInfo));
+                    add(add.getValue(session).convertToEnum(extTypeInfo));
                 } else {
-                    valueSet.add(add.getValue(session).convertTo(type, session.getDatabase().getMode()));
+                    add(add.getValue(session).convertTo(type, session.getDatabase().getMode()));
                 }
                 return this;
             }

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

@@ -66,38 +66,33 @@ 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) {
+        if (value.containsNull()) {
             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 = Comparison.compare(database, l, r, Comparison.EQUAL);
+                if (cmp == 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 = Comparison.compare(database, l, r, Comparison.EQUAL);
+                if (cmp == 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

@@ -5,6 +5,7 @@
  */
 package org.h2.expression.condition;
 
+import org.h2.api.ErrorCode;
 import org.h2.command.dml.Query;
 import org.h2.engine.Database;
 import org.h2.engine.Session;
@@ -12,15 +13,16 @@ import org.h2.expression.Expression;
 import org.h2.expression.ExpressionColumn;
 import org.h2.expression.ExpressionVisitor;
 import org.h2.index.IndexCondition;
+import org.h2.message.DbException;
 import org.h2.result.LocalResult;
 import org.h2.result.ResultInterface;
 import org.h2.table.ColumnResolver;
 import org.h2.table.TableFilter;
 import org.h2.util.StringUtils;
 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 ...)
@@ -52,8 +54,8 @@ public class ConditionInSelect extends Condition {
         Value l = left.getValue(session);
         if (!rows.hasNext()) {
             return ValueBoolean.get(all);
-        } else if (l == ValueNull.INSTANCE) {
-            return l;
+        } else if (l.containsNull()) {
+            return ValueNull.INSTANCE;
         }
         if (!database.getSettings().optimizeInSelect) {
             return getValueSlow(rows, l);
@@ -64,8 +66,8 @@ public class ConditionInSelect extends Condition {
         }
         int columnCount = query.getColumnCount();
         if (columnCount != 1) {
-            l = l.convertTo(Value.ARRAY);
-            Value[] leftValue = ((ValueArray) l).getList();
+            l = l.convertTo(Value.ROW);
+            Value[] leftValue = ((ValueRow) l).getList();
             if (columnCount == leftValue.length && rows.containsDistinct(leftValue)) {
                 return ValueBoolean.TRUE;
             }
@@ -74,13 +76,20 @@ public class ConditionInSelect extends Condition {
             if (dataType == Value.NULL) {
                 return ValueBoolean.FALSE;
             }
+            if (l.getType() == Value.ROW) {
+                Value[] leftList = ((ValueRow) l).getList();
+                if (leftList.length != 1) {
+                    throw DbException.get(ErrorCode.COLUMN_COUNT_DOES_NOT_MATCH);
+                }
+                l = leftList[0];
+            }
             l = l.convertTo(dataType, database.getMode());
             if (rows.containsDistinct(new Value[] { l })) {
                 return ValueBoolean.TRUE;
             }
-            if (rows.containsDistinct(new Value[] { ValueNull.INSTANCE })) {
-                return ValueNull.INSTANCE;
         }
+        if (rows.containsNull()) {
+            return ValueNull.INSTANCE;
         }
         return ValueBoolean.FALSE;
     }
@@ -89,29 +98,35 @@ public class ConditionInSelect extends Condition {
         // this only returns the correct result if the result has at least one
         // row, and if l is not null
         boolean hasNull = false;
-        boolean result = all;
+        if (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 cmp = compare(l, rows);
+                if (cmp == ValueNull.INSTANCE) {
                     hasNull = true;
+                } else if (cmp == ValueBoolean.FALSE) {
+                    return cmp;
+                }
+            }
         } else {
-                value = Comparison.compareNotNull(database, l, r, compareType);
+            while (rows.next()) {
+                Value cmp = compare(l, rows);
+                if (cmp == ValueNull.INSTANCE) {
+                    hasNull = true;
+                } 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.get(all);
+    }
+
+    private Value compare(Value l, ResultInterface rows) {
+        Value[] currentRow = rows.currentRow();
+        Value r = l.getType() != Value.ROW && query.getColumnCount() == 1 ? currentRow[0] : ValueRow.get(currentRow);
+        return Comparison.compare(database, l, r, compareType);
     }
 
     @Override

h2/src/main/org/h2/result/LocalResult.java

@@ -49,6 +49,14 @@ public interface LocalResult extends ResultInterface, ResultTarget {
      */
     boolean containsDistinct(Value[] values);
 
+    /**
+     * Check if this result set contains a NULL value. This method may reset
+     * this result.
+     *
+     * @return true if there is a NULL value
+     */
+    boolean containsNull();
+
     /**
      * Remove the row from the result set if it exists.
      *

h2/src/main/org/h2/result/LocalResultImpl.java

@@ -45,6 +45,7 @@ public class LocalResultImpl implements LocalResult {
     private int[] distinctIndexes;
     private boolean closed;
     private boolean containsLobs;
+    private Boolean containsNull;
 
     /**
      * Construct a local result object.
@@ -127,6 +128,7 @@ public class LocalResultImpl implements LocalResult {
         copy.offset = 0;
         copy.limit = -1;
         copy.external = e2;
+        copy.containsNull = containsNull;
         return copy;
     }
 
@@ -212,6 +214,27 @@ public class LocalResultImpl implements LocalResult {
         return distinctRows.get(array) != null;
     }
 
+    @Override
+    public boolean containsNull() {
+        Boolean r = containsNull;
+        if (r == null) {
+            r = false;
+            reset();
+            loop: while (next()) {
+                Value[] row = currentRow;
+                for (int i = 0; i < visibleColumnCount; i++) {
+                    if (row[i].containsNull()) {
+                        r = true;
+                        break loop;
+                    }
+                }
+            }
+            reset();
+            containsNull = r;
+        }
+        return r;
+    }
+
     @Override
     public void reset() {
         rowId = -1;

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

@@ -1347,7 +1347,7 @@ public abstract class Value {
         return ValueResultSet.get(result);
     }
 
-    private DbException getDataConversionError(int targetType) {
+    DbException getDataConversionError(int targetType) {
         DataType from = DataType.getDataType(getType());
         DataType to = DataType.getDataType(targetType);
         throw DbException.get(ErrorCode.DATA_CONVERSION_ERROR_1, (from != null ? from.name : "type=" + getType())
@@ -1372,7 +1372,7 @@ public abstract class Value {
      * @param v the other value
      * @param databaseMode the database mode
      * @param compareMode the compare mode
-     * @return 0 if both values are equal, -1 if the other value is smaller, and
+     * @return 0 if both values are equal, -1 if this value is smaller, and
      *         1 otherwise
      */
     public final int compareTo(Value v, Mode databaseMode, CompareMode compareMode) {
@@ -1401,6 +1401,48 @@ public abstract class Value {
         return l.compareTypeSafe(v, compareMode);
     }
 
+    /**
+     * Compare this value against another value using the specified compare
+     * mode.
+     *
+     * @param v the other value
+     * @param forEquality perform only check for equality
+     * @param databaseMode the database mode
+     * @param compareMode the compare mode
+     * @return 0 if both values are equal, -1 if this value is smaller, 1
+     *         if other value is larger, {@link Integer#MIN_VALUE} if order is
+     *         not defined due to NULL comparison
+     */
+    public int compareWithNull(Value v, boolean forEquality, Mode databaseMode, CompareMode compareMode) {
+        if (this == ValueNull.INSTANCE || v == ValueNull.INSTANCE) {
+            return Integer.MIN_VALUE;
+        }
+        Value l = this;
+        int leftType = l.getType();
+        int rightType = v.getType();
+        if (leftType != rightType || leftType == Value.ENUM) {
+            int dataType = Value.getHigherOrder(leftType, rightType);
+            if (dataType == Value.ENUM) {
+                ExtTypeInfoEnum enumerators = ExtTypeInfoEnum.getEnumeratorsForBinaryOperation(l, v);
+                l = l.convertToEnum(enumerators);
+                v = v.convertToEnum(enumerators);
+            } else {
+                l = l.convertTo(dataType, databaseMode);
+                v = v.convertTo(dataType, databaseMode);
+            }
+        }
+        return l.compareTypeSafe(v, compareMode);
+    }
+
+    /**
+     * Returns true if this value is NULL or contains NULL value.
+     *
+     * @return true if this value is NULL or contains NULL value
+     */
+    public boolean containsNull() {
+        return false;
+    }
+
     public int getScale() {
         return 0;
     }

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

@@ -10,14 +10,12 @@ import java.sql.PreparedStatement;
 import java.sql.SQLException;
 import java.util.Arrays;
 
-import org.h2.engine.Constants;
 import org.h2.engine.SysProperties;
-import org.h2.util.MathUtils;
 
 /**
  * Implementation of the ARRAY data type.
  */
-public class ValueArray extends Value {
+public class ValueArray extends ValueCollectionBase {
 
     /**
      * Empty array.
@@ -25,12 +23,10 @@ public class ValueArray extends Value {
     private static final Object EMPTY = get(new Value[0]);
 
     private final Class<?> componentType;
-    private final Value[] values;
-    private int hash;
 
     private ValueArray(Class<?> componentType, Value[] list) {
+        super(list);
         this.componentType = componentType;
-        this.values = list;
     }
 
     /**
@@ -65,19 +61,6 @@ public class ValueArray extends Value {
         return (ValueArray) EMPTY;
     }
 
-    @Override
-    public int hashCode() {
-        if (hash != 0) {
-            return hash;
-        }
-        int h = 1;
-        for (Value v : values) {
-            h = h * 31 + v.hashCode();
-        }
-        hash = h;
-        return h;
-    }
-
     public Value[] getList() {
         return values;
     }
@@ -91,15 +74,6 @@ public class ValueArray extends Value {
         return componentType;
     }
 
-    @Override
-    public long getPrecision() {
-        long p = 0;
-        for (Value v : values) {
-            p += v.getPrecision();
-        }
-        return p;
-    }
-
     @Override
     public String getString() {
         StringBuilder builder = new StringBuilder().append('[');
@@ -181,15 +155,6 @@ public class ValueArray extends Value {
         return builder.append(']').toString();
     }
 
-    @Override
-    public int getDisplaySize() {
-        long size = 0;
-        for (Value v : values) {
-            size += v.getDisplaySize();
-        }
-        return MathUtils.convertLongToInt(size);
-    }
-
     @Override
     public boolean equals(Object other) {
         if (!(other instanceof ValueArray)) {
@@ -211,15 +176,6 @@ public class ValueArray extends Value {
         return true;
     }
 
-    @Override
-    public int getMemory() {
-        int memory = 32;
-        for (Value v : values) {
-            memory += v.getMemory() + Constants.MEMORY_POINTER;
-        }
-        return memory;
-    }
-
     @Override
     public Value convertPrecision(long precision, boolean force) {
         if (!force) {

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

+/*
+ * Copyright 2004-2018 H2 Group. Multiple-Licensed under the MPL 2.0,
+ * and the EPL 1.0 (http://h2database.com/html/license.html).
+ * Initial Developer: H2 Group
+ */
+package org.h2.value;
+
+import org.h2.api.ErrorCode;
+import org.h2.engine.Constants;
+import org.h2.engine.Mode;
+import org.h2.message.DbException;
+import org.h2.util.MathUtils;
+
+/**
+ * Base class for ARRAY and ROW values.
+ */
+abstract class ValueCollectionBase extends Value {
+
+    final Value[] values;
+
+    private int hash;
+
+    ValueCollectionBase(Value[] values) {
+        this.values = values;
+    }
+
+    @Override
+    public int hashCode() {
+        if (hash != 0) {
+            return hash;
+        }
+        int h = getType();
+        for (Value v : values) {
+            h = h * 31 + v.hashCode();
+        }
+        hash = h;
+        return h;
+    }
+
+    @Override
+    public long getPrecision() {
+        long p = 0;
+        for (Value v : values) {
+            p += v.getPrecision();
+        }
+        return p;
+    }
+
+    @Override
+    public int getDisplaySize() {
+        long size = 0;
+        for (Value v : values) {
+            size += v.getDisplaySize();
+        }
+        return MathUtils.convertLongToInt(size);
+    }
+
+    @Override
+    public int compareWithNull(Value v, boolean forEquality, Mode databaseMode, CompareMode compareMode) {
+        if (v == ValueNull.INSTANCE) {
+            return Integer.MIN_VALUE;
+        }
+        ValueCollectionBase l = this;
+        int leftType = l.getType();
+        int rightType = v.getType();
+        if (rightType != ARRAY && rightType != ROW) {
+            throw v.getDataConversionError(leftType);
+        }
+        ValueCollectionBase r = (ValueCollectionBase) v;
+        Value[] leftArray = l.values, rightArray = r.values;
+        int leftLength = leftArray.length, rightLength = rightArray.length;
+        if (leftLength != rightLength) {
+            if (leftType == ROW || rightType == ROW) {
+                throw DbException.get(ErrorCode.COLUMN_COUNT_DOES_NOT_MATCH);
+            }
+            if (forEquality) {
+                return 1;
+            }
+        }
+        if (forEquality) {
+            boolean hasNull = false;
+            for (int i = 0; i < leftLength; i++) {
+                Value v1 = leftArray[i];
+                Value v2 = rightArray[i];
+                int comp = v1.compareWithNull(v2, forEquality, databaseMode, compareMode);
+                if (comp != 0) {
+                    if (comp != Integer.MIN_VALUE) {
+                        return comp;
+                    }
+                    hasNull = true;
+                }
+            }
+            return hasNull ? Integer.MIN_VALUE : 0;
+        }
+        int len = Math.min(leftLength, rightLength);
+        for (int i = 0; i < len; i++) {
+            Value v1 = leftArray[i];
+            Value v2 = rightArray[i];
+            int comp = v1.compareWithNull(v2, forEquality, databaseMode, compareMode);
+            if (comp != 0) {
+                return comp;
+            }
+        }
+        return Integer.compare(leftLength, rightLength);
+    }
+
+    @Override
+    public boolean containsNull() {
+        for (Value v : values) {
+            if (v.containsNull()) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public int getMemory() {
+        int memory = 32;
+        for (Value v : values) {
+            memory += v.getMemory() + Constants.MEMORY_POINTER;
+        }
+        return memory;
+    }
+
+}

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

@@ -143,6 +143,11 @@ public class ValueNull extends Value {
         throw DbException.throwInternalError("compare null");
     }
 
+    @Override
+    public boolean containsNull() {
+        return true;
+    }
+
     @Override
     public long getPrecision() {
         return PRECISION;

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

@@ -10,26 +10,21 @@ import java.sql.SQLException;
 import java.util.Arrays;
 
 import org.h2.api.ErrorCode;
-import org.h2.engine.Constants;
 import org.h2.engine.SysProperties;
 import org.h2.message.DbException;
-import org.h2.util.MathUtils;
 
 /**
  * Row value.
  */
-public class ValueRow extends Value {
+public class ValueRow extends ValueCollectionBase {
 
     /**
      * Empty row.
      */
     private static final Object EMPTY = get(new Value[0]);
 
-    private final Value[] values;
-    private int hash;
-
     private ValueRow(Value[] list) {
-        this.values = list;
+        super(list);
     }
 
     /**
@@ -52,19 +47,6 @@ public class ValueRow extends Value {
         return (ValueRow) EMPTY;
     }
 
-    @Override
-    public int hashCode() {
-        if (hash != 0) {
-            return hash;
-        }
-        int h = 1;
-        for (Value v : values) {
-            h = h * 31 + v.hashCode();
-        }
-        hash = h;
-        return h;
-    }
-
     public Value[] getList() {
         return values;
     }
@@ -74,15 +56,6 @@ public class ValueRow extends Value {
         return Value.ROW;
     }
 
-    @Override
-    public long getPrecision() {
-        long p = 0;
-        for (Value v : values) {
-            p += v.getPrecision();
-        }
-        return p;
-    }
-
     @Override
     public String getString() {
         StringBuilder builder = new StringBuilder("ROW (");
@@ -165,15 +138,6 @@ public class ValueRow extends Value {
         return builder.append(')').toString();
     }
 
-    @Override
-    public int getDisplaySize() {
-        long size = 0;
-        for (Value v : values) {
-            size += v.getDisplaySize();
-        }
-        return MathUtils.convertLongToInt(size);
-    }
-
     @Override
     public boolean equals(Object other) {
         if (!(other instanceof ValueRow)) {
@@ -195,15 +159,6 @@ public class ValueRow extends Value {
         return true;
     }
 
-    @Override
-    public int getMemory() {
-        int memory = 32;
-        for (Value v : values) {
-            memory += v.getMemory() + Constants.MEMORY_POINTER;
-        }
-        return memory;
-    }
-
     @Override
     public Value convertPrecision(long precision, boolean force) {
         if (!force) {

h2/src/test/org/h2/test/TestAll.java

@@ -74,6 +74,7 @@ import org.h2.test.db.TestSetCollation;
 import org.h2.test.db.TestSpaceReuse;
 import org.h2.test.db.TestSpatial;
 import org.h2.test.db.TestSpeed;
+import org.h2.test.db.TestSubqueryPerformanceOnLazyExecutionMode;
 import org.h2.test.db.TestSynonymForTable;
 import org.h2.test.db.TestTableEngines;
 import org.h2.test.db.TestTempTables;
@@ -223,7 +224,6 @@ import org.h2.test.unit.TestSort;
 import org.h2.test.unit.TestStreams;
 import org.h2.test.unit.TestStringCache;
 import org.h2.test.unit.TestStringUtils;
-import org.h2.test.unit.TestSubqueryPerformanceOnLazyExecutionMode;
 import org.h2.test.unit.TestTimeStampWithTimeZone;
 import org.h2.test.unit.TestTools;
 import org.h2.test.unit.TestTraceSystem;

h2/src/test/org/h2/test/unit/TestSubqueryPerformanceOnLazyExecutionMode.java → h2/src/test/org/h2/test/db/TestSubqueryPerformanceOnLazyExecutionMode.java

@@ -3,7 +3,7 @@
  * and the EPL 1.0 (http://h2database.com/html/license.html).
  * Initial Developer: H2 Group
  */
-package org.h2.test.unit;
+package org.h2.test.db;
 
 import org.h2.command.dml.SetTypes;
 import org.h2.test.TestBase;
@@ -33,6 +33,11 @@ public class TestSubqueryPerformanceOnLazyExecutionMode extends TestDb {
         TestBase.createCaller().init().test();
     }
 
+    @Override
+    public boolean isEnabled() {
+        return !config.travis;
+    }
+
     @Override
     public void test() throws Exception {
         deleteDb("lazySubq");

h2/src/test/org/h2/test/scripts/datatypes/array.sql

@@ -23,3 +23,66 @@ SELECT ARRAY[10];
 
 SELECT ARRAY[10, 20, 30];
 >> [10, 20, 30]
+
+SELECT ARRAY[1, NULL] IS NOT DISTINCT FROM ARRAY[1, NULL];
+>> TRUE
+
+SELECT ARRAY[1, NULL] IS DISTINCT FROM ARRAY[1, NULL];
+>> FALSE
+
+SELECT ARRAY[1, NULL] = ARRAY[1, NULL];
+>> null
+
+SELECT ARRAY[1, NULL] <> ARRAY[1, NULL];
+>> null
+
+SELECT ARRAY[NULL] = ARRAY[NULL, NULL];
+>> FALSE
+
+select ARRAY[1, NULL, 2] = ARRAY[1, NULL, 1];
+>> FALSE
+
+select ARRAY[1, NULL, 2] <> ARRAY[1, NULL, 1];
+>> TRUE
+
+SELECT ARRAY[1, NULL] > ARRAY[1, NULL];
+>> null
+
+SELECT ARRAY[1, 2] > ARRAY[1, NULL];
+>> null
+
+SELECT ARRAY[1, 2, NULL] > ARRAY[1, 1, NULL];
+>> TRUE
+
+SELECT ARRAY[1, 1, NULL] > ARRAY[1, 2, NULL];
+>> FALSE
+
+SELECT ARRAY[1, 2, NULL] < ARRAY[1, 1, NULL];
+>> FALSE
+
+SELECT ARRAY[1, 1, NULL] <= ARRAY[1, 1, NULL];
+>> null
+
+SELECT ARRAY[1, NULL] IN (ARRAY[1, NULL]);
+>> null
+
+CREATE TABLE TEST(A ARRAY);
+> ok
+
+INSERT INTO TEST VALUES (ARRAY[1, NULL]), (ARRAY[1, 2]);
+> update count: 2
+
+SELECT ARRAY[1, 2] IN (SELECT A FROM TEST);
+>> TRUE
+
+SELECT ROW (ARRAY[1, 2]) IN (SELECT A FROM TEST);
+>> TRUE
+
+SELECT ARRAY[1, NULL] IN (SELECT A FROM TEST);
+>> null
+
+SELECT ROW (ARRAY[1, NULL]) IN (SELECT A FROM TEST);
+>> null
+
+DROP TABLE TEST;
+> ok

h2/src/test/org/h2/test/scripts/datatypes/row.sql

@@ -8,3 +8,66 @@ SELECT ROW (10);
 
 SELECT (10, 20, 30);
 >> ROW (10, 20, 30)
+
+SELECT (1, NULL) IS NOT DISTINCT FROM (1, NULL);
+>> TRUE
+
+SELECT (1, NULL) IS DISTINCT FROM ROW (1, NULL);
+>> FALSE
+
+SELECT (1, NULL) = (1, NULL);
+>> null
+
+SELECT (1, NULL) <> (1, NULL);
+>> null
+
+SELECT ROW (NULL) = (NULL, NULL);
+> exception COLUMN_COUNT_DOES_NOT_MATCH
+
+select (1, NULL, 2) = (1, NULL, 1);
+>> FALSE
+
+select (1, NULL, 2) <> (1, NULL, 1);
+>> TRUE
+
+SELECT (1, NULL) > (1, NULL);
+>> null
+
+SELECT (1, 2) > (1, NULL);
+>> null
+
+SELECT (1, 2, NULL) > (1, 1, NULL);
+>> TRUE
+
+SELECT (1, 1, NULL) > (1, 2, NULL);
+>> FALSE
+
+SELECT (1, 2, NULL) < (1, 1, NULL);
+>> FALSE
+
+SELECT (1, 1, NULL) <= (1, 1, NULL);
+>> null
+
+SELECT (1, 2) IN (SELECT 1, 2);
+>> TRUE
+
+SELECT (1, 2) IN (SELECT * FROM VALUES (1, 2), (1, NULL));
+>> TRUE
+
+SELECT (1, 2) IN (SELECT * FROM VALUES (1, 1), (1, NULL));
+>> null
+
+SELECT (1, 2) IN (SELECT * FROM VALUES (1, 1), (1, 3));
+>> FALSE
+
+SELECT (1, NULL) IN (SELECT 1, NULL);
+>> null
+
+SELECT (1, ARRAY[1]) IN (SELECT 1, ARRAY[1]);
+>> TRUE
+
+SELECT (1, ARRAY[1]) IN (SELECT 1, ARRAY[2]);
+>> FALSE
+
+SELECT (1, ARRAY[NULL]) IN (SELECT 1, ARRAY[NULL]);
+>> null

h2/src/test/org/h2/test/scripts/dml/select.sql

@@ -244,11 +244,11 @@ CREATE TABLE TEST(A INT, B INT);
 INSERT INTO TEST VALUES (1, 1), (1, 2), (2, 1), (2, 2), (2, 3);
 > update count: 5
 
-SELECT A, COUNT(B) FROM TEST GROUP BY A OFFSET 1;
+SELECT A, COUNT(B) FROM TEST GROUP BY A ORDER BY A OFFSET 1;
 > A COUNT(B)
 > - --------
 > 2 3
-> rows: 1
+> rows (ordered): 1
 
 DROP TABLE TEST;
 > ok
@@ -463,3 +463,6 @@ SELECT (3, 4) > ALL (SELECT ID, V FROM TEST);
 
 DROP TABLE TEST;
 > ok
+
+SELECT 1 = ALL (SELECT * FROM VALUES (NULL), (1), (2), (NULL) ORDER BY 1);
+>> FALSE

h2/src/test/org/h2/test/synth/TestNestedJoins.java

@@ -386,15 +386,17 @@ public class TestNestedJoins extends TestDb {
         rs = stat.executeQuery("select distinct t1.a, t2.a, t3.a from t1 " +
                 "right outer join t3 on t1.b=t3.a " +
                 "right outer join t2 on t2.b=t1.a");
-        // expected: 1  1       1; null    2       null
-        assertTrue(rs.next());
-        assertEquals("1", rs.getString(1));
-        assertEquals("1", rs.getString(2));
-        assertEquals("1", rs.getString(3));
+        // expected:
+        // null 2 null
+        // 1    1 1
         assertTrue(rs.next());
         assertEquals(null, rs.getString(1));
         assertEquals("2", rs.getString(2));
         assertEquals(null, rs.getString(3));
+        assertTrue(rs.next());
+        assertEquals("1", rs.getString(1));
+        assertEquals("1", rs.getString(2));
+        assertEquals("1", rs.getString(3));
         assertFalse(rs.next());
         stat.execute("drop table t1, t2, t3, t4");
 

h2/src/test/org/h2/test/synth/TestOuterJoins.java

@@ -339,15 +339,17 @@ public class TestOuterJoins extends TestDb {
                 "ON T2.B = T1.A", sql);
         rs = stat.executeQuery("select distinct t1.a, t2.a, t3.a from t1 " +
                 "right outer join t3 on t1.b=t3.a right outer join t2 on t2.b=t1.a");
-        // expected: 1  1       1; null    2       null
-        assertTrue(rs.next());
-        assertEquals("1", rs.getString(1));
-        assertEquals("1", rs.getString(2));
-        assertEquals("1", rs.getString(3));
+        // expected:
+        // null 2 null
+        // 1    1 1
         assertTrue(rs.next());
         assertEquals(null, rs.getString(1));
         assertEquals("2", rs.getString(2));
         assertEquals(null, rs.getString(3));
+        assertTrue(rs.next());
+        assertEquals("1", rs.getString(1));
+        assertEquals("1", rs.getString(2));
+        assertEquals("1", rs.getString(3));
         assertFalse(rs.next());
         stat.execute("drop table t1, t2, t3, t4");