>Now I do not get it. 
>  Did you port it to Pharo?

I spend about a day evaluating it in 40272. 

I looked at three packages (and their two test packages).

PostgresV3-Core handles the V3 protocol, makes a connection

using a socket, provides a result set with rows, columns and 

text converters.

I got a few problems in the unit tests, looks like something in the 

way floats are handled is different (PG3SocketReadStream>>parseFloatLength:

and there is a method missing PG3SocketReadStream>>parseScaledDecimal

PostgresV3-Pool provides a connection pool. 

I was able to use that to connect to a database, execute queries and get

data out of it. Issues there are trivial:

PG3Connection>>md5HashMessage: aString

We don't have WebUtils, but we have MD5

Then there is PostgresV3-CodeMirror.

In PG3SchemaMirror there are some overrides to select a different

compiler (+parser) and code highlighter. That allows subclasses 

to have plsql functions as methods, using the PG3FunctionMirror.

In Pharo, I couldn't easily find how to change the code highlighter in Nautilus.

The PG3Compiler just changes the parser used to PG3Parser. 

The PG3Parser is a subclass from the squeak parser and so uses some things that work a bit different

PG3Parser>>checkSyntaxFor: uses a cue instance variable. It is not a full plsql parser, relying on the 

database to check syntax. 

PG3SchemaChanges uses Toolbuilder to show a window with the differences between the functions in the

database and those in the image and select which ones to change. 

Stephan