Add missing file

h2/src/main/org/h2/jdbc/JdbcPreparedStatement.java

@@ -31,9 +31,9 @@ import org.h2.expression.ParameterInterface;
 import org.h2.message.DbException;
 import org.h2.message.TraceObject;
 import org.h2.result.ResultInterface;
-import org.h2.tools.MergedResultSet;
 import org.h2.util.DateTimeUtils;
 import org.h2.util.IOUtils;
+import org.h2.util.MergedResultSet;
 import org.h2.util.New;
 import org.h2.value.DataType;
 import org.h2.value.Value;

h2/src/main/org/h2/util/MergedResultSet.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.util;
+
+import java.sql.ResultSet;
+import java.sql.ResultSetMetaData;
+import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.h2.tools.SimpleResultSet;
+
+/**
+ * Merged result set.
+ */
+public final class MergedResultSet {
+    private static final class ColumnInfo {
+        final String name;
+
+        final int type;
+
+        final int precision;
+
+        final int scale;
+
+        ColumnInfo(String name, int type, int precision, int scale) {
+            this.name = name;
+            this.type = type;
+            this.precision = precision;
+            this.scale = scale;
+        }
+
+        @Override
+        public boolean equals(Object obj) {
+            if (this == obj)
+                return true;
+            if (obj == null || getClass() != obj.getClass())
+                return false;
+            ColumnInfo other = (ColumnInfo) obj;
+            return name.equals(other.name);
+        }
+
+        @Override
+        public int hashCode() {
+            return name.hashCode();
+        }
+
+    }
+
+    private final ArrayList<Map<ColumnInfo, Object>> data = New.arrayList();
+
+    private final ArrayList<ColumnInfo> columns = New.arrayList();
+
+    public void add(ResultSet rs) throws SQLException {
+        ResultSetMetaData meta = rs.getMetaData();
+        int cols = meta.getColumnCount();
+        if (cols == 0) {
+            return;
+        }
+        ColumnInfo[] info = new ColumnInfo[cols];
+        for (int i = 1; i <= cols; i++) {
+            ColumnInfo ci = new ColumnInfo(meta.getColumnName(i), meta.getColumnType(i), meta.getPrecision(i),
+                    meta.getScale(i));
+            info[i - 1] = ci;
+            if (!columns.contains(ci)) {
+                columns.add(ci);
+            }
+        }
+        while (rs.next()) {
+            if (cols == 1) {
+                data.add(Collections.singletonMap(info[0], rs.getObject(1)));
+            } else {
+                HashMap<ColumnInfo, Object> map = new HashMap<>();
+                for (int i = 1; i <= cols; i++) {
+                    ColumnInfo ci = info[i - 1];
+                    map.put(ci, rs.getObject(i));
+                }
+                data.add(map);
+            }
+        }
+    }
+
+    public SimpleResultSet getKeys() {
+        SimpleResultSet rs = new SimpleResultSet();
+        for (ColumnInfo ci : columns) {
+            rs.addColumn(ci.name, ci.type, ci.precision, ci.scale);
+        }
+        for (Map<ColumnInfo, Object> map : data) {
+            Object[] row = new Object[columns.size()];
+            for (Map.Entry<ColumnInfo, Object> entry : map.entrySet()) {
+                row[columns.indexOf(entry.getKey())] = entry.getValue();
+            }
+            rs.addRow(row);
+        }
+        return rs;
+    }
+
+    @Override
+    public String toString() {
+        return columns + ": " + data.size();
+    }
+
+}