protected internal override Expression VisitSqlConstant(SqlConstantExpression c)
{
if (c.Value == null)
{
sb.Append("NULL");
}
else
{
if (!Schema.Current.Settings.IsDbType(c.Value.GetType().UnNullify()))
{
throw new NotSupportedException(string.Format("The constant for {0} is not supported", c.Value));
}
if (c.Value.Equals(true))
{
sb.Append("1");
}
else if (c.Value.Equals(false))
{
sb.Append("0");
}
else if (c.Value is string)
{
sb.Append(((string)c.Value == "") ? "''" : ("'" + c.Value + "'"));
}
else
{
sb.Append(c.ToString());
}
}
return(c);
}
protected internal override Expression VisitSqlConstant(SqlConstantExpression c)
{
if (c.Value == null)
{
sb.Append("NULL");
}
else
{
if (!schema.Settings.IsDbType(c.Value.GetType().UnNullify()))
{
throw new NotSupportedException(string.Format("The constant for {0} is not supported", c.Value));
}
if (!isPostgres && c.Value.Equals(true))
{
sb.Append('1');
}
else if (!isPostgres && c.Value.Equals(false))
{
sb.Append('0');
}
else if (c.Value is string s)
{
sb.Append(s == "" ? "''" : ("'" + s + "'"));
}
else if (c.Value is TimeSpan ts)
{
sb.Append(@$ "CONVERT(time, '{ts}')");
}
else
{
sb.Append(c.ToString());
}
}
return(c);
}
protected internal virtual Expression VisitSqlConstant(SqlConstantExpression sce)
{
return(sce);
}
protected virtual bool CompareSqlConstant(SqlConstantExpression a, SqlConstantExpression b)
{
return(object.Equals(a.Value, b.Value));
}
protected internal override Expression VisitSqlConstant(SqlConstantExpression sce)
{
return(Expression.Constant(sce.Value, sce.Type));
}