public override void Bind(BindContext context)
{
base.Bind(context);
type_ = new IntType();
// Add the first table in the scope as tableref of count(*)
// because adding all of them would make the containg expression
// to appear to require more than one table when that is really
// not the case and may lead to attempts create a join or push
// count(*) to both sides of an existing join.
// This will let count(*) to be pushed to the correct node and side.
List <TableRef> trefs = context.AllTableRefs();
if (trefs.Count > 0)
{
tableRefs_.Add(trefs[0]);
}
}
static ColumnType externalType2ColumnType(Type type)
{
ColumnType ctype;
if (type == typeof(double))
{
ctype = new DoubleType();
}
else if (type == typeof(int))
{
ctype = new IntType();
}
else if (type == typeof(string))
{
ctype = new VarCharType(64 * 1024);
}
else
{
throw new NotImplementedException();
}
return(ctype);
}
public override void Bind(BindContext context)
{
base.Bind(context);
type_ = new IntType();
}
public HashFunc(List <Expr> args) : base("hash", args)
{
argcnt_ = 1;
type_ = new IntType();
}
