I have next task.
There is PostgreSQL DB. With field like: id, mydata.

mydata - is binary blob. It can be 10MB or even more.

I need load all data from PostgreSQL to SQLLite.

I decided ti create struct that and fill it with data. And then do INSERT operation in sqllite.

But I do not know is it's good way, and if it's ok what data type should I use for blob (binary data).

	struct MyData
	{
		string  id;
		string  mydata; // what datatype I should use here??
	}	

	MyData [] mydata;

	MyData md;


	while (rs.next())
	{

	 md.id = to!string(rs.getString(1));
	 md.mydata = to!string(rs.getString(2)); //??

	 mydata ~= md;
	}

....

stmtLite.executeUpdate(`insert into MySyncData(id,mydata) values(md.id,md.data)`); //ddbc driver
is it's normal way to insert data?

On Wednesday, 6 April 2016 at 12:56:39 UTC, Suliman wrote:
> I have next task.
> There is PostgreSQL DB. With field like: id, mydata.
>
> mydata - is binary blob. It can be 10MB or even more.
>
> I need load all data from PostgreSQL to SQLLite.
>
> I decided ti create struct that and fill it with data. And then do INSERT operation in sqllite.
>
> But I do not know is it's good way, and if it's ok what data type should I use for blob (binary data).
>
> 	struct MyData
> 	{
> 		string  id;
> 		string  mydata; // what datatype I should use here??
> 	}	
>
> 	MyData [] mydata;
>
> 	MyData md;
>
>
> 	while (rs.next())
> 	{
>
> 	 md.id = to!string(rs.getString(1));
> 	 md.mydata = to!string(rs.getString(2)); //??
>
> 	 mydata ~= md;
> 	}
>
> ....
>
> stmtLite.executeUpdate(`insert into MySyncData(id,mydata) values(md.id,md.data)`); //ddbc driver
> is it's normal way to insert data?

Blobs are byte arrays, so they should be ubyte[]. They shouldn't be strings, which are explicitly text only.

On Wednesday, 6 April 2016 at 12:56:39 UTC, Suliman wrote:
> I have next task.
> There is PostgreSQL DB. With field like: id, mydata.
>
> mydata - is binary blob. It can be 10MB or even more.
>
> I need load all data from PostgreSQL to SQLLite.
>
> I decided ti create struct that and fill it with data. And then do INSERT operation in sqllite.
>
> But I do not know is it's good way, and if it's ok what data type should I use for blob (binary data).
>
> 	struct MyData
> 	{
> 		string  id;
> 		string  mydata; // what datatype I should use here??
> 	}	
>
> 	MyData [] mydata;
>
> 	MyData md;
>
>
> 	while (rs.next())
> 	{
>
> 	 md.id = to!string(rs.getString(1));
> 	 md.mydata = to!string(rs.getString(2)); //??
>
> 	 mydata ~= md;
> 	}
>
> ....
>
> stmtLite.executeUpdate(`insert into MySyncData(id,mydata) values(md.id,md.data)`); //ddbc driver
> is it's normal way to insert data?

Use ubyte[] or byte[] for blob, and setUbytes/getUbytes (setBytes/getBytes) to set/get value
There was issue in `bytea` type support in PostgreSQL driver. Now it's fixed.