Merge branch 'master' of git.evergreen-ils.org:Evergreen into social

[evergreen-equinox.git] / Open-ILS / src / sql / Pg / 002.schema.config.sql

diff --git a/Open-ILS/src/sql/Pg/002.schema.config.sql b/Open-ILS/src/sql/Pg/002.schema.config.sql
index 5bbb33d..2bcb3c9 100644 (file)
--- a/Open-ILS/src/sql/Pg/002.schema.config.sql
+++ b/Open-ILS/src/sql/Pg/002.schema.config.sql
@@ -54,10 +54,39 @@ ALTER TABLE config.global_flag ADD PRIMARY KEY (name);
 
 CREATE TABLE config.upgrade_log (
     version         TEXT    PRIMARY KEY,
-    install_date    TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT NOW()
+    install_date    TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT NOW(),
+    applied_to      TEXT
 );
 
-INSERT INTO config.upgrade_log (version) VALUES ('0523'); -- dbs
+CREATE TABLE config.db_patch_dependencies (
+  db_patch      TEXT PRIMARY KEY,
+  supersedes    TEXT[],
+  deprecates    TEXT[]
+);
+
+CREATE OR REPLACE FUNCTION evergreen.array_overlap_check (/* field */) RETURNS TRIGGER AS $$
+DECLARE
+    fld     TEXT;
+    cnt     INT;
+BEGIN
+    fld := TG_ARGV[1];
+    EXECUTE 'SELECT COUNT(*) FROM '|| TG_TABLE_SCHEMA ||'.'|| TG_TABLE_NAME ||' WHERE '|| fld ||' && ($1).'|| fld INTO cnt USING NEW;
+    IF cnt > 0 THEN
+        RAISE EXCEPTION 'Cannot insert duplicate array into field % of table %', fld, TG_TABLE_SCHEMA ||'.'|| TG_TABLE_NAME;
+    END IF;
+    RETURN NEW;
+END;
+$$ LANGUAGE PLPGSQL;
+
+CREATE TRIGGER no_overlapping_sups
+    BEFORE INSERT OR UPDATE ON config.db_patch_dependencies
+    FOR EACH ROW EXECUTE PROCEDURE evergreen.array_overlap_check ('supersedes');
+
+CREATE TRIGGER no_overlapping_deps
+    BEFORE INSERT OR UPDATE ON config.db_patch_dependencies
+    FOR EACH ROW EXECUTE PROCEDURE evergreen.array_overlap_check ('deprecates');
+
+INSERT INTO config.upgrade_log (version, applied_to) VALUES ('0533', :eg_version); -- gmc
 
 CREATE TABLE config.bib_source (
        id              SERIAL  PRIMARY KEY,
@@ -794,4 +823,68 @@ BEGIN
 END;
 $$ LANGUAGE PLPGSQL;
 
+-- List applied db patches that are deprecated by (and block the application of) my_db_patch
+CREATE OR REPLACE FUNCTION evergreen.upgrade_list_applied_deprecates ( my_db_patch TEXT ) RETURNS SETOF TEXT AS $$
+    SELECT  DISTINCT l.version
+      FROM  config.upgrade_log l
+            JOIN config.db_patch_dependencies d ON (l.version::TEXT[] && d.deprecates)
+      WHERE d.db_patch = $1 
+$$ LANGUAGE SQL;
+
+-- List applied db patches that are superseded by (and block the application of) my_db_patch
+CREATE OR REPLACE FUNCTION evergreen.upgrade_list_applied_supersedes ( my_db_patch TEXT ) RETURNS SETOF TEXT AS $$
+    SELECT  DISTINCT l.version
+      FROM  config.upgrade_log l
+            JOIN config.db_patch_dependencies d ON (l.version::TEXT[] && d.supersedes)
+      WHERE d.db_patch = $1 
+$$ LANGUAGE SQL;
+
+-- List applied db patches that deprecates (and block the application of) my_db_patch
+CREATE OR REPLACE FUNCTION evergreen.upgrade_list_applied_deprecated ( my_db_patch TEXT ) RETURNS TEXT AS $$
+    SELECT  db_patch
+      FROM  config.db_patch_dependencies
+      WHERE ARRAY[$1]::TEXT[] && deprecates 
+$$ LANGUAGE SQL;
+
+-- List applied db patches that supersedes (and block the application of) my_db_patch
+CREATE OR REPLACE FUNCTION evergreen.upgrade_list_applied_superseded ( my_db_patch TEXT ) RETURNS TEXT AS $$
+    SELECT  db_patch
+      FROM  config.db_patch_dependencies
+      WHERE ARRAY[$1]::TEXT[] && supersedes 
+$$ LANGUAGE SQL;
+
+-- Make sure that no deprecated or superseded db patches are currently applied
+CREATE OR REPLACE FUNCTION evergreen.upgrade_verify_no_dep_conflicts ( my_db_patch TEXT ) RETURNS BOOL AS $$
+    SELECT  COUNT(*) = 0
+      FROM  (SELECT * FROM evergreen.upgrade_list_applied_deprecates( $1 )
+                UNION
+             SELECT * FROM evergreen.upgrade_list_applied_supersedes( $1 )
+                UNION
+             SELECT * FROM evergreen.upgrade_list_applied_deprecated( $1 )
+                UNION
+             SELECT * FROM evergreen.upgrade_list_applied_superseded( $1 ))x
+$$ LANGUAGE SQL;
+
+-- Raise an exception if there are, in fact, dep/sup confilct
+CREATE OR REPLACE FUNCTION evergreen.upgrade_deps_block_check ( my_db_patch TEXT, my_applied_to TEXT ) RETURNS BOOL AS $$
+BEGIN
+    IF NOT evergreen.upgrade_verify_no_dep_conflicts( my_db_patch ) THEN
+        RAISE EXCEPTION '
+Upgrade script % can not be applied:
+  applied deprecated scripts %
+  applied superseded scripts %
+  deprecated by %
+  superseded by %',
+            my_db_patch,
+            ARRAY_ACUM(evergreen.upgrade_list_applied_deprecates(my_db_patch)),
+            ARRAY_ACUM(evergreen.upgrade_list_applied_supersedes(my_db_patch)),
+            evergreen.upgrade_list_applied_deprecated(my_db_patch),
+            evergreen.upgrade_list_applied_superseded(my_db_patch);
+    END IF;
+
+    INSERT INTO config.upgrade_log (version, applied_to) VALUES (my_db_patch, my_applied_to);
+    RETURN TRUE;
+END;
+$$ LANGUAGE PLPGSQL;
+
 COMMIT;