public Declare ReadDeclare()
{
SkipComments();
Declare dec = new Declare();
Next();
var exp = ReadExpression();
if (exp is Variable vari1)
{
dec.VarName = vari1.Name;
}
else
{
ex("declare语法错误。");
}
exp = ReadExpression();
SqlDataTyoe t = new SqlDataTyoe();
if (exp is Variable vari)
{
t.DataType = SqlDataTyoe.GetDataType(vari.Name);
}
else if (exp is Function func)
{
t.DataType = SqlDataTyoe.GetDataType(func.Name);
var paras = func.Arguments?.GetList();
if (paras != null && paras.Count > 0)
{
try
{
t.Length1 = int.Parse(((Constant)paras[0]).Content);
if (paras.Count > 1)
{
t.Length2 = int.Parse(((Constant)paras[1]).Content);
if (paras.Count > 2)
{
ex($"类型[{func.Name}]的长度/精度参数错误。");
}
}
}
catch (Exception)
{
ex($"类型[{func.Name}]的长度/精度参数错误。");
}
}
}
dec.DataType = t;
return(dec);
}
public virtual string Declare(Declare dec)
{
return($"DECLARE {dec.VarName} {GetDataType(dec.DataType)}");
}