1 files changed, 31 insertions, 0 deletions
diff --git a/include/my_decimal_limits.h b/include/my_decimal_limits.h
new file mode 100644
index 00000000000..d9dabe92373
--- /dev/null
+++ b/include/my_decimal_limits.h
@@ -0,0 +1,31 @@
+#ifndef my_decimal_limits_h
+#define my_decimal_limits_h
+
+#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))
+*/
+#define DECIMAL_MAX_PRECISION (DECIMAL_MAX_POSSIBLE_PRECISION - 8*2)
+#define DECIMAL_MAX_SCALE 30
+#define DECIMAL_NOT_SPECIFIED 31
+
+/**
+  maximum length of string representation (number of maximum decimal
+  digits + 1 position for sign + 1 position for decimal point)
+*/
+#define DECIMAL_MAX_STR_LENGTH (DECIMAL_MAX_POSSIBLE_PRECISION + 2)
+
+#endif