From 463d0cf5170b2d9a52534f3307cff952d6935c78 Mon Sep 17 00:00:00 2001
From: Frédéric Buclin <LpSolit@gmail.com>
Date: Thu, 30 Aug 2012 00:45:52 +0200
Subject: Bug 731156: [Oracle] Adding or removing a DB column does not handle
 SERIAL correctly r=dkl a=LpSolit

---
 Bugzilla/DB/Oracle.pm | 62 ++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 49 insertions(+), 13 deletions(-)

(limited to 'Bugzilla/DB/Oracle.pm')

diff --git a/Bugzilla/DB/Oracle.pm b/Bugzilla/DB/Oracle.pm
index d7ff08676..f5045b2c7 100644
--- a/Bugzilla/DB/Oracle.pm
+++ b/Bugzilla/DB/Oracle.pm
@@ -616,11 +616,25 @@ sub bz_setup_database {
 
     $self->SUPER::bz_setup_database(@_);
 
+    my $sth = $self->prepare("SELECT OBJECT_NAME FROM USER_OBJECTS WHERE OBJECT_NAME = ?");
     my @tables = $self->bz_table_list_real();
+
     foreach my $table (@tables) {
         my @columns = $self->bz_table_columns_real($table);
         foreach my $column (@columns) {
             my $def = $self->bz_column_info($table, $column);
+            # bz_add_column() before Bugzilla 4.2.3 didn't handle primary keys
+            # correctly (bug 731156). We have to add missing sequences and
+            # triggers ourselves.
+            if ($def->{TYPE} =~ /SERIAL/i) {
+                my $sequence = "${table}_${column}_SEQ";
+                my $exists = $self->selectrow_array($sth, undef, $sequence);
+                if (!$exists) {
+                    my @sql = $self->_get_create_seq_ddl($table, $column);
+                    $self->do($_) foreach @sql;
+                }
+            }
+
             if ($def->{REFERENCES}) {
                 my $references = $def->{REFERENCES};
                 my $update = $references->{UPDATE} || 'CASCADE';
@@ -634,15 +648,13 @@ sub bz_setup_database {
                     $to_table = 'tag';
                 }
                 if ( $update =~ /CASCADE/i ){
-                     my $trigger_name = uc($fk_name . "_UC");
-                     my $exist_trigger = $self->selectcol_arrayref(
-                         "SELECT OBJECT_NAME FROM USER_OBJECTS 
-                          WHERE OBJECT_NAME = ?", undef, $trigger_name);
+                    my $trigger_name = uc($fk_name . "_UC");
+                    my $exist_trigger = $self->selectcol_arrayref($sth, undef, $trigger_name);
                     if(@$exist_trigger) {
                         $self->do("DROP TRIGGER $trigger_name");
                     }
   
-                     my $tr_str = "CREATE OR REPLACE TRIGGER $trigger_name"
+                    my $tr_str = "CREATE OR REPLACE TRIGGER $trigger_name"
                          . " AFTER UPDATE OF $to_column ON $to_table "
                          . " REFERENCING "
                          . " NEW AS NEW "
@@ -653,22 +665,46 @@ sub bz_setup_database {
                          . "        SET $column = :NEW.$to_column"
                          . "      WHERE $column = :OLD.$to_column;"
                          . " END $trigger_name;";
-                         $self->do($tr_str);
-               }
-         }
-     }
-   }
+                    $self->do($tr_str);
+                }
+            }
+        }
+    }
 
    # Drop the trigger which causes bug 541553
    my $trigger_name = "PRODUCTS_MILESTONEURL";
-   my $exist_trigger = $self->selectcol_arrayref(
-       "SELECT OBJECT_NAME FROM USER_OBJECTS
-        WHERE OBJECT_NAME = ?", undef, $trigger_name);
+   my $exist_trigger = $self->selectcol_arrayref($sth, undef, $trigger_name);
    if(@$exist_trigger) {
        $self->do("DROP TRIGGER $trigger_name");
    }
 }
 
+# These two methods have been copied from Bugzilla::DB::Schema::Oracle.
+sub _get_create_seq_ddl {
+    my ($self, $table, $column) = @_;
+
+    my $seq_name = "${table}_${column}_SEQ";
+    my $seq_sql = "CREATE SEQUENCE $seq_name INCREMENT BY 1 START WITH 1 " .
+                  "NOMAXVALUE NOCYCLE NOCACHE";
+    my $trigger_sql = $self->_get_create_trigger_ddl($table, $column, $seq_name);
+    return ($seq_sql, $trigger_sql);
+}
+
+sub _get_create_trigger_ddl {
+    my ($self, $table, $column, $seq_name) = @_;
+
+    my $trigger_sql = "CREATE OR REPLACE TRIGGER ${table}_${column}_TR "
+                    . " BEFORE INSERT ON $table "
+                    . " FOR EACH ROW "
+                    . " BEGIN "
+                    . "   SELECT ${seq_name}.NEXTVAL "
+                    . "   INTO :NEW.$column FROM DUAL; "
+                    . " END;";
+    return $trigger_sql;
+}
+
+############################################################################
+
 package Bugzilla::DB::Oracle::st;
 use base qw(DBI::st);
  
-- 
cgit v1.2.3-24-g4f1b