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feat(db-tool): hectic-inheritance: bootstrap hectic.created_at / hectic.updated_at inheritance hook

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Adds a SQL bundle plus event triggers that enforce `INHERITS (hectic.created_at)`
on every user CREATE TABLE and auto-attach a BEFORE UPDATE row trigger when a
table inherits `hectic.updated_at`. Always-exempt: `hectic`, `information_schema`,
`pg_*`, declarative partitions, temp tables. Per-DB opt-out via the GUC
`hectic.inheritance_extra_excluded_schemas`.

Exposed three ways:
  * `pkgs.hectic.hectic-inheritance` — derivation with the SQL at
    $out/share/hectic/hectic-inheritance.sql
  * `self.lib.hecticInheritance.{sql,path}` — pkgs-free Nix surface
  * `postgres-init` opt-in via `PG_HECTIC_INHERITANCE=1` (HECTIC_INHERITANCE_SQL
    overrides the default)

Test postgres-init-hectic-inheritance covers all six branches: bootstrap,
non-inheriting reject, accepting inheritance, auto updated_at trigger fires,
GUC exclusion, declarative partition exemption.
This commit is contained in:
yukkop
2026-04-30 15:16:57 +00:00
parent 7d5300853b
commit 58e9aa8fad
7 changed files with 339 additions and 5 deletions
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22
package/db-tool/default.nix
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@@ -1,7 +1,14 @@
{ dash, hectic, postgresql_17, neovim, openssh, coreutils, gawk, lib }:
{ dash, hectic, postgresql_17, neovim, openssh, coreutils, gawk, lib, runCommand }:
let
shell = "${dash}/bin/dash";
hecticInheritanceSqlPath = ./sql/hectic-inheritance.sql;
hecticInheritance = runCommand "hectic-inheritance" { } ''
mkdir -p "$out/share/hectic"
cp ${hecticInheritanceSqlPath} "$out/share/hectic/hectic-inheritance.sql"
'';
mkDatabase =
{ postgresql ? postgresql_17 }:
hectic.writeShellApplication {
@@ -37,7 +44,11 @@ let
name = "postgres-init";
runtimeInputs = [ postgresql coreutils ];
text = builtins.readFile ./postgres-init.sh;
text = ''
HECTIC_INHERITANCE_SQL_DEFAULT="${hecticInheritance}/share/hectic/hectic-inheritance.sql"
export HECTIC_INHERITANCE_SQL_DEFAULT
${builtins.readFile ./postgres-init.sh}
'';
meta = {
description = "Initialize local PostgreSQL instance";
@@ -62,7 +73,8 @@ let
};
in
{
"db-tool" = lib.makeOverridable mkDatabase { };
"postgres-init" = lib.makeOverridable mkPostgresInit { };
"postgres-cleanup" = lib.makeOverridable mkPostgresCleanup { };
"db-tool" = lib.makeOverridable mkDatabase { };
"postgres-init" = lib.makeOverridable mkPostgresInit { };
"postgres-cleanup" = lib.makeOverridable mkPostgresCleanup { };
"hectic-inheritance" = hecticInheritance;
}