should be it

external/duckdb/third_party/libpg_query/include/common/keywords.hpp

@@ -0,0 +1,34 @@
+/*-------------------------------------------------------------------------
+ *
+ * keywords.h
+ *	  lexical token lookup for key words in PostgreSQL
+ *
+ *
+ * Portions Copyright (c) 1996-2017, PostgreSQL Global Development PGGroup
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/common/keywords.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#pragma once
+
+#include <cstdint>
+#include "pg_simplified_token.hpp"
+
+/* Keyword categories --- should match lists in gram.y */
+#define UNRESERVED_KEYWORD		0
+#define COL_NAME_KEYWORD		1
+#define TYPE_FUNC_NAME_KEYWORD	2
+#define RESERVED_KEYWORD		3
+
+namespace duckdb_libpgquery {
+
+typedef struct PGScanKeyword {
+	const char *name; /* in lower case */
+	int16_t value;    /* grammar's token code */
+	int16_t category; /* see codes above */
+} PGScanKeyword;
+
+const PGScanKeyword *ScanKeywordLookup(const char *text, const PGScanKeyword *keywords, int num_keywords);
+}