TRUNC(DOUBLE) dont returns an INTEGER
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Key: CORE-3425
URL: http://tracker.firebirdsql.org/browse/CORE-3425
Project: Firebird Core
Issue Type: Bug
Components: Engine
Affects Versions: 2.1.4
Environment: Windows 7 x64, Firebird 2.1.4 "Stable" 32 bits
Reporter: Pierre Yager
Priority: Minor
The result of the TRUNC() built-in function is not coherent, and is very
complex to use.
I want to obtain a random string of 4 numeric characters from 1000 to 9999
So I type :
select cast(TRUNC(RAND() * 8999) + 1000) as varchar(4)) from rdb$database
And I get this error :
Arithmetic overflow or division by zero has occurred.arithmetic exception,
numeric overflow, or string truncation.
Because the result of RAND() is a double, the result of TRUNC(RAND()) is a
double too.
I have to cast the result into an integer in order to have this code working as
expected :
select cast(cast(trunc(rand() * 8999) + 1000 as integer) as varchar(4)) from
rdb$database
I expect that when TRUNC() is used without the second argument, the result is
ALWAYS an INTEGER or a BIGINT
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