rename all remaining packages to internal/ (#12418)

This is to ensure that there are no projects
that try to import `minio/minio/pkg` into
their own repo. Any such common packages should
go to `https://github.com/minio/pkg`

internal/s3select/sql/value_contrib.go

@@ -0,0 +1,38 @@
+/*
+ * MinIO Object Storage (c) 2021 MinIO, Inc.
+ *
+ * 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 sql
+
+import "time"
+
+func timestampCompare(op string, left, right time.Time) bool {
+	switch op {
+	case opLt:
+		return left.Before(right)
+	case opLte:
+		return left.Before(right) || left.Equal(right)
+	case opGt:
+		return left.After(right)
+	case opGte:
+		return left.After(right) || left.Equal(right)
+	case opEq:
+		return left.Equal(right)
+	case opIneq:
+		return !left.Equal(right)
+	}
+	// This case does not happen
+	return false
+}