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diff --git a/storage/innobase/include/rem0cmp.inl b/storage/innobase/include/rem0cmp.inl
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+++ b/storage/innobase/include/rem0cmp.inl
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+/*****************************************************************************
+
+Copyright (c) 1994, 2014, Oracle and/or its affiliates. All Rights Reserved.
+Copyright (c) 2020, MariaDB Corporation.
+
+This program is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free Software
+Foundation; version 2 of the License.
+
+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 GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with
+this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA
+
+*****************************************************************************/
+
+/*******************************************************************//**
+@file include/rem0cmp.ic
+Comparison services for records
+
+Created 7/1/1994 Heikki Tuuri
+************************************************************************/
+
+#include <mysql_com.h>
+#include <my_sys.h>
+
+/** Compare two data fields.
+@param[in] dfield1 data field; must have type field set
+@param[in] dfield2 data field
+@return the comparison result of dfield1 and dfield2
+@retval 0 if dfield1 is equal to dfield2
+@retval negative if dfield1 is less than dfield2
+@retval positive if dfield1 is greater than dfield2 */
+UNIV_INLINE
+int
+cmp_dfield_dfield(
+	const dfield_t*	dfield1,
+	const dfield_t*	dfield2)
+{
+	const dtype_t*	type;
+
+	ut_ad(dfield_check_typed(dfield1));
+
+	type = dfield_get_type(dfield1);
+
+	return(cmp_data_data(type->mtype, type->prtype,
+			     (const byte*) dfield_get_data(dfield1),
+			     dfield_get_len(dfield1),
+			     (const byte*) dfield_get_data(dfield2),
+			     dfield_get_len(dfield2)));
+}
+
+/** Compare two data fields.
+@param[in] dfield1 data field
+@param[in] dfield2 data field
+@return the comparison result of dfield1 and dfield2
+@retval 0 if dfield1 is equal to dfield2, or a prefix of dfield1
+@retval negative if dfield1 is less than dfield2
+@retval positive if dfield1 is greater than dfield2 */
+UNIV_INLINE
+int
+cmp_dfield_dfield_like_prefix(
+	const dfield_t*	dfield1,
+	const dfield_t*	dfield2)
+{
+	const dtype_t*  type;
+
+	ut_ad(dfield_check_typed(dfield1));
+	ut_ad(dfield_check_typed(dfield2));
+
+	type = dfield_get_type(dfield1);
+
+#ifdef UNIV_DEBUG
+	switch (type->prtype & DATA_MYSQL_TYPE_MASK) {
+	case MYSQL_TYPE_BIT:
+	case MYSQL_TYPE_STRING:
+	case MYSQL_TYPE_VAR_STRING:
+	case MYSQL_TYPE_TINY_BLOB:
+	case MYSQL_TYPE_MEDIUM_BLOB:
+	case MYSQL_TYPE_BLOB:
+	case MYSQL_TYPE_LONG_BLOB:
+	case MYSQL_TYPE_VARCHAR:
+		break;
+	default:
+		ut_error;
+	}
+#endif /* UNIV_DEBUG */
+
+	uint cs_num = (uint) dtype_get_charset_coll(type->prtype);
+
+	if (CHARSET_INFO* cs = get_charset(cs_num, MYF(MY_WME))) {
+		return(cs->coll->strnncoll(
+			       cs,
+			       static_cast<const uchar*>(
+				       dfield_get_data(dfield1)),
+			       dfield_get_len(dfield1),
+			       static_cast<const uchar*>(
+				       dfield_get_data(dfield2)),
+			       dfield_get_len(dfield2),
+			       1));
+	}
+
+	ib::fatal() << "Unable to find charset-collation " << cs_num;
+	return(0);
+}