fix(mssql): only last column in foreign key definition kept

[gnarlex]

For SQL Server, when copying foreign key definitions with multiple columns, only the last of N columns is taken over.

The original code tried to aggregate columns in-place, but it seems that some part of the code does not retrieve the original, but rather creates a new list/foreign key object.

Adjust the SQL query, to do the column name aggregation. Then we can avoid having the lisp code to in-place update magic.
(Similar to how it's done in the other DB kind code.)

(I suppose there's great potential to unify the code.)

[RobertoTassistroLeonardo]

Very interesting and useful work: in mssql-schema.lisp I had a problem with parentheses... so no compilation
but adding parentheses near the end ";;;" I am able to compile: the program works as expected: really great work! (src/sources/mssql/mssql-schema.lisp)

(defmethod fetch-foreign-keys ((catalog catalog) (mssql copy-mssql)
                               &key including excluding)
  "Get the list of MSSQL foreign key definitions per table."
  (loop
     :with incl-where := (filter-list-to-where-clause
                          mssql including :not nil
                          :schema-col "kcu1.table_schema"
                          :table-col "kcu1.table_name")
     :with excl-where := (filter-list-to-where-clause
                          mssql excluding :not t
                          :schema-col "kcu1.table_schema"
                          :table-col "kcu1.table_name")
     :for (fkey-name schema-name table-name cols
                     fschema-name ftable-name fcols
                     fk-update-rule fk-delete-rule)
     :in (mssql-query (sql "/mssql/list-all-fkeys.sql"
                         (db-name *mssql-db*) (db-name *mssql-db*)
                         incl-where incl-where excl-where excl-where))
     :do (let* ((schema    (find-schema catalog schema-name))
                (table     (find-table schema table-name))
                (fschema   (find-schema catalog fschema-name))
                (ftable    (find-table fschema ftable-name))
                (fkey      (make-fkey :table table
                                      :columns (mapcar #'apply-identifier-case
                                                       (sq:split-sequence #\, cols))
                                      :foreign-table ftable
                                      :foreign-columns (mapcar
                                                        #'apply-identifier-case
                                                        (sq:split-sequence #\, fcols))
                                      :update-rule fk-update-rule
                                      :delete-rule fk-delete-rule)))
;;;   
        (add-fkey table fkey))
;;; 
     :finally (return catalog)))

[dimitri]

It seems like a compilation error was introduced in this PR. Can you see about fixing it before merge?

; compiling file "/home/runner/work/pgloader/pgloader/src/sources/mssql/mssql-schema.lisp" (written 30 JUL 2024 11:25:04 AM):
; processing (IN-PACKAGE :PGLOADER.SOURCE.MSSQL)
; processing (DEFCLASS COPY-MSSQL ...)
; processing (DEFVAR *TABLE-TYPE* ...)
; processing (DEFMETHOD FILTER-LIST-TO-WHERE-CLAUSE ...)
; processing (DEFMETHOD FETCH-COLUMNS ...)
; processing (DEFMETHOD FETCH-INDEXES ...)
; 
; caught ERROR:
;   READ error during COMPILE-FILE:
;   
;     end of file on #<SB-INT:FORM-TRACKING-STREAM for "file /home/runner/work/pgloader/pgloader/src/sources/mssql/mssql-schema.lisp" {100E59DD43}>
;   
;     (in form starting at line: 121, column: 0, position: 5463)

; compilation aborted after 0:00:00.016
While evaluating the form starting at line 21, column 0
  of #P"/home/runner/work/pgloader/pgloader/dumper-2SKVI5f7.lisp":Fatal COMPILE-FILE-ERROR:
  COMPILE-FILE-ERROR while
  compiling #<CL-SOURCE-FILE "pgloader" "src" "sources" "mssql" "mssql-schema">

[gnarlex]

Yes, will fix it later today.
It's due to a misplaced parenthesis.

Fixed it in another PR, but forgot to cherry-pick the fix here.

[RobertoTassistro]

On my system, this Debian Autopkgtest/debian-build works..

name: Debian Autopkgtest

on:
  pull_request: {}
  push: {}

jobs:
  debian-build:
    runs-on: ubuntu-22.04
    steps:
      - name: Checkout code
        uses: actions/checkout@v2

      - name: Set executable permissions
        run: chmod +x debian/tests/testsuite

      - name: Install postgresql-common
        run: sudo apt-get install -y postgresql-common

      - name: Install pgapt repository
        run: sudo /usr/share/postgresql-common/pgdg/apt.postgresql.org.sh -y

      - name: Install dependencies
        run: |
          sudo apt-get update
          sudo apt-get install -y postgresql-server-dev-16
          git clone https://github.com/RhodiumToad/ip4r.git
          cd ip4r
          make
          sudo make install

      - name: Install build-dependencies
        run: sudo apt-get build-dep -y .

      - name: Build pgloader.deb
        run: dpkg-buildpackage --no-sign --buildinfo-option=--version -b

      - name: Install autopkgtest
        run: sudo apt-get install -y autopkgtest

      - name: Autopkgtest
        run: sudo autopkgtest ./ ../pgloader_*_amd64.deb -- null