Introduce change_tag_def table

[lhc/web/wiklou.git] / maintenance / oracle / tables.sql

diff --git a/maintenance/oracle/tables.sql b/maintenance/oracle/tables.sql
index 87039fb..df74f64 100644 (file)
--- a/maintenance/oracle/tables.sql
+++ b/maintenance/oracle/tables.sql
@@ -436,6 +436,32 @@ BEGIN
 END;
 /*$mw$*/
 
+-- Table defining tag names for IDs. Also stores hit counts to avoid expensive queries on change_tag
+CREATE SEQUENCE change_tag_def_ctd_id_seq;
+CREATE TABLE &mw_prefix.change_tag_def (
+    -- Numerical ID of the tag (ct_tag_id refers to this)
+    ctd_id NUMBER  NOT NULL,
+    -- Symbolic name of the tag (what would previously be put in ct_tag)
+    ctd_name VARCHAR2(255) NOT NULL,
+    -- Whether this tag was defined manually by a privileged user using Special:Tags
+    ctd_user_defined CHAR(1) DEFAULT '0' NOT NULL,
+    -- Number of times this tag was used
+    ctd_count NUMBER NOT NULL DEFAULT 0
+);
+
+ALTER TABLE &mw_prefix.change_tag_def ADD CONSTRAINT &mw_prefix.change_tag_def_pk PRIMARY KEY (ctd_id);
+CREATE UNIQUE INDEX &mw_prefix.ctd_name ON &mw_prefix.change_tag_def (ctd_name);
+CREATE INDEX &mw_prefix.ctd_count ON &mw_prefix.change_tag_def (ctd_count);
+CREATE INDEX &mw_prefix.ctd_user_defined ON &mw_prefix.change_tag_def (ctd_user_defined);
+
+/*$mw$*/
+CREATE TRIGGER &mw_prefix.change_tag_def_seq_trg BEFORE INSERT ON &mw_prefix.change_tag_def
+    FOR EACH ROW WHEN (new.ctd_id IS NULL)
+BEGIN
+    &mw_prefix.lastval_pkg.setLastval(change_tag_def_ctd_id_seq.nextval, :new.ctd_id);
+END;
+/*$mw$*/
+
 CREATE TABLE &mw_prefix.langlinks (
   ll_from    NUMBER  NOT NULL,
   ll_lang    VARCHAR2(20),