[feature][runtime] Add dateSubFun

runtime/src/main/java/io/dingodb/expr/runtime/op/OpKeys.java

@@ -37,6 +37,7 @@ public final class OpKeys {
     public static final BinaryOpKeys STRING_INT = new BinaryOpKeys(Types.STRING, Types.INT);
     public static final BinaryOpKeys DECIMAL_INT = new BinaryOpKeys(Types.DECIMAL, Types.INT);
     public static final BinaryOpKeys DATE_STRING = new BinaryOpKeys(Types.DATE, Types.STRING);
+    public static final BinaryOpKeys DATE_LONG = new BinaryOpKeys(Types.DATE, Types.LONG);
     public static final BinaryOpKeys TIME_STRING = new BinaryOpKeys(Types.TIME, Types.STRING);
     public static final BinaryOpKeys TIMESTAMP_STRING = new BinaryOpKeys(Types.TIMESTAMP, Types.STRING);
     public static final TertiaryOpKeys STRING_INT_INT = new TertiaryOpKeys(Types.STRING, Types.INT, Types.INT);

runtime/src/main/java/io/dingodb/expr/runtime/op/time/DateSubFun.java

@@ -0,0 +1,63 @@
+/*
+ * Copyright 2021 DataCanvas
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.dingodb.expr.runtime.op.time;
+
+import io.dingodb.expr.annotations.Operators;
+import io.dingodb.expr.runtime.ExprConfig;
+import io.dingodb.expr.runtime.op.BinaryOp;
+import io.dingodb.expr.runtime.op.OpKey;
+import io.dingodb.expr.runtime.op.OpKeys;
+import io.dingodb.expr.runtime.type.Type;
+import io.dingodb.expr.runtime.type.Types;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+import java.sql.Date;
+
+@Operators
+public class DateSubFun extends BinaryOp {
+    public static final String NAME = "DATE_SUB";
+    private static final long serialVersionUID = 3693816042300916311L;
+
+    @Override
+    protected Date evalNonNullValue(@NonNull Object value0, @NonNull Object value1,
+                                    ExprConfig config) {
+        Date dateVal = (Date) value0;
+        Long val1 = (Long) value1;
+        long newDateLongVal = dateVal.getTime() - val1;
+        return new Date(newDateLongVal);
+    }
+
+    @Override
+    public final OpKey bestKeyOf(@NonNull Type @NonNull [] types) {
+        return OpKeys.DATE_LONG.bestKeyOf(types);
+    }
+
+    @Override
+    public @NonNull String getName() {
+        return NAME;
+    }
+
+    @Override
+    public Type getType() {
+        return Types.DATE;
+    }
+
+    @Override
+    public OpKey getKey() {
+        return keyOf(Types.DATE, Types.LONG);
+    }
+}