private void GetString(StringBuilder builder, IDictionary <String, Object> ps, Expression exp)
{
exp = Flatten(exp);
if (exp == null)
{
return;
}
// 递归构建，下级运算符优先级较低时加括号
var bracket = false;
if (exp is WhereExpression where)
{
if (where.Empty)
{
return;
}
if (where.Operator > Operator)
{
bracket = true;
}
}
if (bracket)
{
builder.Append("(");
}
exp.GetString(builder, ps);
if (bracket)
{
builder.Append(")");
}
}
private void GetString(IDatabase db, StringBuilder builder, IDictionary <String, Object> ps, Expression exp)
{
exp = Flatten(exp);
if (exp == null || exp.IsEmpty)
{
return;
}
// 递归构建，下级运算符优先级较低时加括号
var bracket = false;
if (exp is WhereExpression where)
{
//if (where.IsEmpty) return;
if (where.Operator > Operator)
{
bracket = true;
}
}
if (bracket)
{
builder.Append('(');
}
exp.GetString(db, builder, ps);
if (bracket)
{
builder.Append(')');
}
}
