1 files changed, 19 insertions, 0 deletions
diff --git a/document/src/vespa/document/select/parser_limits.h b/document/src/vespa/document/select/parser_limits.h
new file mode 100644
index 00000000000..24c0a165611
--- /dev/null
+++ b/document/src/vespa/document/select/parser_limits.h
@@ -0,0 +1,19 @@
+// Copyright Verizon Media. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+#pragma once
+
+#include <cstdint>
+#include <cstddef>
+
+namespace document::select {
+
+// Any resource constraints set for parsing document selection expressions
+struct ParserLimits {
+    // Max depth allowed for nodes in the AST tree.
+    constexpr static uint32_t MaxRecursionDepth    = 1024;
+    // Max size of entire input document selection string, in bytes.
+    constexpr static size_t   MaxSelectionByteSize = 1024*1024;
+};
+
+void __attribute__((noinline)) throw_max_depth_exceeded_exception();
+
+}