From f6ec2be215bbfbdf99156507b5e53fc0a185c5ac Mon Sep 17 00:00:00 2001 From: TMA Date: Sat, 19 Apr 2025 22:44:01 +0200 Subject: [PATCH] schema v1 setup script --- brmbar3/SQL-schema-v001.sql | 59 +++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 brmbar3/SQL-schema-v001.sql diff --git a/brmbar3/SQL-schema-v001.sql b/brmbar3/SQL-schema-v001.sql new file mode 100644 index 0000000..44b9693 --- /dev/null +++ b/brmbar3/SQL-schema-v001.sql @@ -0,0 +1,59 @@ +--RESET search_path; +SELECT pg_catalog.set_config('search_path', '', false); +-- intoduce implementation schema +CREATE SCHEMA IF NOT EXISTS brmbar_implementation; +-- version table (with initialization) +CREATE TABLE IF NOT EXISTS brmbar_implementation.brmbar_schema ( + ver INTEGER NOT NULL +); +DO $$ +DECLARE v INTEGER; +BEGIN + SELECT ver FROM brmbar_implementation.brmbar_schema INTO v; + IF v IS NULL THEN + INSERT INTO brmbar_implementation.brmbar_schema (ver) VALUES (1); + END IF; +END; +$$; + +CREATE OR REPLACE FUNCTION brmbar_implementation.has_exact_schema_version( + IN i_ver INTEGER NOT NULL +) RETURNS INTEGER +VOLATILE NOT LEAKPROOF LANGUAGE plpgsql AS $$ +DECLARE + v_ver INTEGER; +BEGIN + SELECT ver INTO STRICT v_ver FROM brmbar_implementation.brmbar_schema; + IF v_ver IS NULL or v_ver <> i_ver THEN + RAISE EXCEPTION 'Invalid brmbar schema version'; + END IF; + RETURN v_ver; +/* +EXCEPTION + WHEN NO_DATA_FOUND THEN + RAISE EXCEPTION 'PID % not found'; + WHEN TOO_MANY_ROWS THEN + RAISE EXCEPTION 'PID % not unique'; +*/ +END; +$$; + +CREATE OR REPLACE FUNCTION brmbar_implementation.upgrade_schema_version_to( + IN i_ver INTEGER NOT NULL +) RETURNS INTEGER +VOLATILE NOT LEAKPROOF LANGUAGE plpgsql AS $$ +DECLARE + v_ver INTEGER; +BEGIN + SELECT brmbar_implementation.has_exact_schema_version(i_ver) INTO v_ver; + IF v_ver + 1 = i_ver THEN + UPDATE brmbar_implementation.brmbar_schema SET ver = i_ver; + ELSE + RAISE EXCEPTION 'Invalid brmbar schema version'; + END IF; + RETURN i_ver; +END; +$$; + +-- vim: set ft=plsql : +