Float precision

[bloerwald]

We are using a table containing floats, and have tests that use random values. The builtin serializers use std::ostringstream as underlying implementation, which defaults to std::ios_base::precision() == 6. This implies that values are quite quickly truncated.

A quick hack of

diff --git a/include/sqlpp11/sqlite3/connection.h b/include/sqlpp11/sqlite3/connection.h
index 79b3ae6..bd1a8ea 100644
--- a/include/sqlpp11/sqlite3/connection.h
+++ b/include/sqlpp11/sqlite3/connection.h
@@ -159,4 +159,5 @@ namespace sqlpp
       serializer_t(const connection& db) : _db(db), _count(1)
       {
+          _os.precision (std::numeric_limits<long double>::digits10 + 1);
       }

shows that the underlying implementation supports higher precision values without issue.

Was this an explicit design choice or are float values just so rare nobody noticed?

[rbock]

Hi,

It was not a design choice. I believe that most folks avoid float values. I know that I do :-)

I am happy to accept a pull request to change the precision.

Best,
Roland