ci: add release checklist

Author: ashenBlade

dev/release-checklist.md

@@ -0,0 +1,54 @@
+# Release checklist
+
+This is simple check list for new release.
+
+## Configurations
+
+There tests must be performed for VS Code versions:
+
+- 1.30 (minimal supported version)
+- 1.45 (workspace.fs + Uri.joinPath)
+- 1.68 (array display with length in debugger view)
+- 1.90 (debugFocus API)
+- latest
+
+And all supported PostgreSQL versions (with latest minor versions):
+
+- 12
+- 13
+- 14
+- 15
+- 16
+- 17
+
+## Check list
+
+Schema:
+
+```sql
+CREATE TABLE tbl1(id INTEGER, value TEXT);
+CREATE TABLE tbl2(id INTEGER, value TEXT);
+```
+
+Prepare:
+
+- Run DB with logfile
+- Run PSQL
+- Start debugging session (F5).
+- Set breakpoint to `src/backend/optimizer/plan/planner.c:subquery_planner`
+  at the end of function (at `return`)
+- Run `SELECT tbl1.id, MAX(tbl2.value) FROM tbl1 JOIN tbl2 ON tbl1.id = tbl2.id GROUP BY tbl1.id;`
+
+Checks:
+
+| Test                 | Steps                                                                                                                   | Expected                                                                 |
+| -------------------- | ----------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------ |
+| Cast to real Tag     | `final_rel->cheapest_total_path`                                                                                        | Not plain Path - AggPath with inner MergePath (or something another)     |
+| Special array member | `root->simple_rel_array`                                                                                                | Array of 4 elements: NULL, x1, x2, NULL                                  |
+| Bitmapset            | `root->all_baserels`                                                                                                    | Bitmapset with 2 elements: 1, 2                                          |
+| List                 | `root->processed_tlist`                                                                                                 | List with 2 TargetEntry element: Var and Aggref                          |
+| Refresh variables    | Click refresh button in view                                                                                            | Variables have not changed but refresh in noticeable                     |
+| pprint               | `root`, context menu, 'Dump Node to stdout'                                                                             | Node must be shown in log file                                           |
+| Create config file   | Delete config file (if exists), run task `PgSQL: Open or create configuration file` and click 'Yes'                     | File `pgsql_hacker_helper.json` created in `.vscode` folder              |
+| Open config file     | Create config file (if not exists), make changes and run task `PgSQL: Open or create configuration file`                | Opened config file has same values as changed version                    |
+| Update config file   | Open default config file, add 2 alias types and 1 array special member and run task `PgSQL: Refresh configuration file` | In log must be message about adding 1 array special member and 2 aliases |