New upstream version 6.0.20upstream

1 files changed, 108 insertions, 0 deletions

diff --git a/src/mongo/db/query/query_shape/shape_helpers.cpp b/src/mongo/db/query/query_shape/shape_helpers.cpp
new file mode 100644
index 00000000000..8eea475ab78
--- /dev/null
+++ b/src/mongo/db/query/query_shape/shape_helpers.cpp
@@ -0,0 +1,108 @@
+/**
+ *    Copyright (C) 2023-present MongoDB, Inc.
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the Server Side Public License, version 1,
+ *    as published by MongoDB, Inc.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    Server Side Public License for more details.
+ *
+ *    You should have received a copy of the Server Side Public License
+ *    along with this program. If not, see
+ *    <http://www.mongodb.com/licensing/server-side-public-license>.
+ *
+ *    As a special exception, the copyright holders give permission to link the
+ *    code of portions of this program with the OpenSSL library under certain
+ *    conditions as described in each individual source file and distribute
+ *    linked combinations including the program with the OpenSSL library. You
+ *    must comply with the Server Side Public License in all respects for
+ *    all of the code used other than as permitted herein. If you modify file(s)
+ *    with this exception, you may extend this exception to your version of the
+ *    file(s), but you are not obligated to do so. If you do not wish to do so,
+ *    delete this exception statement from your version. If you delete this
+ *    exception statement from all source files in the program, then also delete
+ *    it in the license file.
+ */
+
+#include "mongo/db/query/query_shape/shape_helpers.h"
+
+#include "mongo/db/query/query_shape/query_shape_gen.h"
+
+namespace mongo::shape_helpers {
+
+static constexpr StringData hintSpecialField = "$hint"_sd;
+// A "Flat" object is one with only top-level fields. We won't descend recursively to shapify any
+// sub-objects.
+BSONObj shapifyFlatObj(BSONObj obj, const SerializationOptions& opts, bool valuesAreLiterals) {
+    if (obj.isEmpty()) {
+        // fast-path for the common case.
+        return obj;
+    }
+
+    BSONObjBuilder bob;
+    for (BSONElement elem : obj) {
+        if (hintSpecialField.compare(elem.fieldNameStringData()) == 0) {
+            if (elem.type() == BSONType::String) {
+                bob.append(hintSpecialField, opts.serializeFieldPathFromString(elem.String()));
+            } else if (elem.type() == BSONType::Object) {
+                opts.appendLiteral(&bob, hintSpecialField, elem.Obj());
+            } else {
+                // SERVER-85500: $hint syntax will not be validated if the collection does not
+                // exist, so we should accept a value that is neither string nor object here.
+                opts.appendLiteral(&bob, hintSpecialField, elem);
+            }
+            continue;
+        }
+
+        // $natural doesn't need to be redacted.
+        if (elem.fieldNameStringData().compare(query_request_helper::kNaturalSortField) == 0) {
+            bob.append(elem);
+            continue;
+        }
+
+        if (valuesAreLiterals) {
+            opts.appendLiteral(&bob, opts.serializeFieldPathFromString(elem.fieldName()), elem);
+        } else {
+            bob.appendAs(elem, opts.serializeFieldPathFromString(elem.fieldName()));
+        }
+    }
+    return bob.obj();
+}
+
+BSONObj extractHintShape(BSONObj hintObj, const SerializationOptions& opts) {
+    return shapifyFlatObj(hintObj, opts, /* valuesAreLiterals = */ false);
+}
+
+BSONObj extractMinOrMaxShape(BSONObj obj, const SerializationOptions& opts) {
+    return shapifyFlatObj(obj, opts, /* valuesAreLiterals = */ true);
+}
+
+void appendNamespaceShape(BSONObjBuilder& bob,
+                          const NamespaceString& nss,
+                          const SerializationOptions& opts) {
+    bob.append("db", opts.serializeIdentifier(nss.db()));
+    bob.append("coll", opts.serializeIdentifier(nss.coll()));
+}
+
+NamespaceStringOrUUID parseNamespaceShape(BSONElement cmdNsElt) {
+    tassert(7632900, "cmdNs must be an object.", cmdNsElt.type() == BSONType::Object);
+    auto cmdNs = query_shape::CommandNamespace::parse("cmdNs"_sd, cmdNsElt.embeddedObject());
+
+    if (cmdNs.getColl().has_value()) {
+        tassert(7632903,
+                "Exactly one of 'uuid' and 'coll' can be defined.",
+                !cmdNs.getUuid().has_value());
+        return NamespaceString(cmdNs.getDb(), cmdNs.getColl().value());
+    } else {
+        tassert(7632904,
+                "Exactly one of 'uuid' and 'coll' can be defined.",
+                !cmdNs.getColl().has_value());
+        UUID uuid = uassertStatusOK(UUID::parse(cmdNs.getUuid().value().toString()));
+        return NamespaceStringOrUUID(cmdNs.getDb().toString(), uuid);
+    }
+}
+
+}  // namespace mongo::shape_helpers