Again, if you can read Spanish then the following article has more examples:
https://firebird21.wordpress.com/2015/04/23/validando-que-el-contenido-de-un-char-o-varchar-sea-numerico/ Greetings. Walter. On Thu, Apr 23, 2015 at 8:03 PM, Walter R. Ojeda Valiente < sistemas2000profesio...@gmail.com> wrote: > Sorry, typo in the SELECT, just one comma after MyColumn2. > > Greetings. > > Walter. > > > On Thu, Apr 23, 2015 at 8:00 PM, Walter R. Ojeda Valiente < > sistemas2000profesio...@gmail.com> wrote: > >> You can use SIMILAR TO, something like it: >> >> SELECT >> MyColumn1, >> MyColumn2,, >> MyColumn3 >> FROM >> MyTable >> WHERE >> MyColumn1 SIMILAR TO '[[:DIGIT:]]*' >> >> Where just the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 are valid. >> >> If you need the decimal point too, try something like it, where the >> decimail point is required: >> >> SIMILAR TO '[[:DIGIT:]]*.[[:DIGIT:]]*' >> >> And if you can have integers and floats (decimal point can be, but not >> required), you can try: >> >> SIMILAR TO '[[:DIGIT:]]*.?[[:DIGIT:]]*' >> >> And, finally, if you can read Spanish, take a look at: >> >> https://firebird21.wordpress.com/2014/04/27/usando-similar-to/ >> >> https://firebird21.wordpress.com/2014/11/25/validando-un-e-mail/ >> >> Greetings. >> >> Walter. >> >> >> On Thu, Apr 23, 2015 at 2:34 PM, sboyd...@gmail.com [firebird-support] < >> firebird-support@yahoogroups.com> wrote: >> >>> >>> >>> Is there any way, within a stored procedure, to test a VARCHAR to see if >>> it contains a valid number? I have a parameter that can contain different >>> types of value and it would be nice to be able to know if CAST(param as >>> BIGINT) is going to fail before an exception is thrown. >>> >>> >>> >>> >>> >> >> >
