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Merge pull request #400 from konradh/sqlite/floating-point-precision 

sqlite: Improve precision for floating-point types
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Adam D. Ruppe 2023-11-05 10:23:47 -05:00 committed by GitHub
parent 9aeed1c2c1 08d072806c
commit 8cb756ba6f
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1 changed files with 11 additions and 0 deletions
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sqlite.d
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@ -237,6 +237,9 @@ class SqliteResult : ResultSet {
foreach(c; rows[position]) {
if(auto t = c.peek!(immutable(byte)[]))
r.row ~= DatabaseDatum(cast(string) *t);
else if (auto d = c.peek!double)
// 17 significant decimal digits are enough to not lose precision (IEEE 754 section 5.12.2)
r.row ~= DatabaseDatum(format!"%.17s"(*d));
else
r.row ~= DatabaseDatum(c.coerce!(string));
}
@ -508,6 +511,7 @@ template extract(A, T, R...){
void bind (const char[] name, const char[] value){ bind(bindNameLookUp(name), value); }
void bind (const char[] name, int value){ bind(bindNameLookUp(name), value); }
void bind (const char[] name, float value){ bind(bindNameLookUp(name), value); }
void bind (const char[] name, double value){ bind(bindNameLookUp(name), value); }
void bind (const char[] name, const byte[] value){ bind(bindNameLookUp(name), value); }
void bind (const char[] name, const ubyte[] value){ bind(bindNameLookUp(name), value); }
@ -525,6 +529,11 @@ template extract(A, T, R...){
throw new DatabaseException("bind " ~ db.error());
}
void bind(int col, double value){
if(sqlite3_bind_double(s, col, value) != SQLITE_OK)
throw new DatabaseException("bind " ~ db.error());
}
void bind(int col, int value){
if(sqlite3_bind_int(s, col, value) != SQLITE_OK)
throw new DatabaseException("bind " ~ db.error());
@ -572,6 +581,8 @@ template extract(A, T, R...){
bind(col, v.get!string);
else if(v.peek!float)
bind(col, v.get!float);
else if(v.peek!double)
bind(col, v.get!double);
else if(v.peek!(byte[]))
bind(col, v.get!(byte[]));
else if(v.peek!(ubyte[]))