The following syntax is used for numeric literals in ODBC.
numeric-literal ::= signed-numeric-literal | unsigned-numeric-literal
signed-numeric-literal ::= [sign] unsigned-numeric-literal
unsigned-numeric-literal ::= exact-numeric-literal | approximate-numeric-literal
exact-numeric-literal ::= unsigned-integer [period[unsigned-integer]] |
period unsigned-integer
sign ::= plus-sign | minus-sign
approximate-numeric-literal ::= mantissa E exponent
mantissa ::= exact-numeric-literal
exponent ::= signed-integer
signed-integer ::= [sign] unsigned-integer
unsigned-integer ::= digit...
plus-sign ::= +
minus-sign ::= -
digit ::= 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 0
period ::= .