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diff --git a/include/my_decimal_limits.h b/include/my_decimal_limits.h
new file mode 100644
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+++ b/include/my_decimal_limits.h
@@ -0,0 +1,51 @@
+#ifndef MY_DECIMAL_LIMITS_INCLUDED
+#define MY_DECIMAL_LIMITS_INCLUDED
+/* Copyright (c) 2011 Monty Program Ab
+
+   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 */
+
+#define DECIMAL_LONGLONG_DIGITS 22
+#define DECIMAL_LONG_DIGITS 10
+#define DECIMAL_LONG3_DIGITS 8
+
+/** maximum length of buffer in our big digits (uint32). */
+#define DECIMAL_BUFF_LENGTH 9
+
+/* the number of digits that my_decimal can possibly contain */
+#define DECIMAL_MAX_POSSIBLE_PRECISION (DECIMAL_BUFF_LENGTH * 9)
+
+
+/**
+  maximum guaranteed precision of number in decimal digits (number of our
+  digits * number of decimal digits in one our big digit - number of decimal
+  digits in one our big digit decreased by 1 (because we always put decimal
+  point on the border of our big digits))
+
+  With normal precision we can handle 65 digits. MariaDB can store in
+  the .frm up to 63 digits.  By default we use DECIMAL_NOT_SPECIFIED digits
+  when converting strings to decimal, so we don't want to set this too high.
+  To not use up all digits for the scale we limit the number of decimals to
+  38.
+*/
+#define DECIMAL_MAX_PRECISION (DECIMAL_MAX_POSSIBLE_PRECISION - 8*2)
+#define DECIMAL_MAX_SCALE 38
+#define DECIMAL_NOT_SPECIFIED 39
+
+/**
+  maximum length of string representation (number of maximum decimal
+  digits + 1 position for sign + 1 position for decimal point, no terminator)
+*/
+#define DECIMAL_MAX_STR_LENGTH (DECIMAL_MAX_POSSIBLE_PRECISION + 2)
+
+#endif /* MY_DECIMAL_LIMITS_INCLUDED */