return $fk_name;
}
+sub get_alter_column_ddl {
+ my ($self, $table, $column, $new_def, $set_nulls_to) = @_;
+
+ my @statements;
+ my $old_def = $self->get_column_abstract($table, $column);
+ my $specific = $self->{db_specific};
+
+ # If the types have changed, we have to deal with that.
+ if (uc(trim($old_def->{TYPE})) ne uc(trim($new_def->{TYPE}))) {
+ push(@statements, $self->_get_alter_type_sql($table, $column,
+ $new_def, $old_def));
+ }
+
+ my $default = $new_def->{DEFAULT};
+ my $default_old = $old_def->{DEFAULT};
+ # This first condition prevents "uninitialized value" errors.
+ if (!defined $default && !defined $default_old) {
+ # Do Nothing
+ }
+ # If we went from having a default to not having one
+ elsif (!defined $default && defined $default_old) {
+ push(@statements, "ALTER TABLE $table MODIFY $column"
+ . " DEFAULT NULL");
+ }
+ # If we went from no default to a default, or we changed the default.
+ elsif ( (defined $default && !defined $default_old) ||
+ ($default ne $default_old) )
+ {
+ $default = $specific->{$default} if exists $specific->{$default};
+ push(@statements, "ALTER TABLE $table MODIFY $column "
+ . " DEFAULT $default");
+ }
+
+ # If we went from NULL to NOT NULL.
+ if (!$old_def->{NOTNULL} && $new_def->{NOTNULL}) {
+ my $setdefault;
+ # Handle any fields that were NULL before, if we have a default,
+ $setdefault = $new_def->{DEFAULT} if exists $new_def->{DEFAULT};
+ # But if we have a set_nulls_to, that overrides the DEFAULT
+ # (although nobody would usually specify both a default and
+ # a set_nulls_to.)
+ $setdefault = $set_nulls_to if defined $set_nulls_to;
+ if (defined $setdefault) {
+ push(@statements, "UPDATE $table SET $column = $setdefault"
+ . " WHERE $column IS NULL");
+ }
+ push(@statements, "ALTER TABLE $table MODIFY $column"
+ . " NOT NULL");
+ push (@statements, _get_notnull_trigger_ddl($table, $column))
+ if $old_def->{TYPE} =~ /varchar|text/i
+ && $new_def->{TYPE} =~ /varchar|text/i;
+ }
+ # If we went from NOT NULL to NULL
+ elsif ($old_def->{NOTNULL} && !$new_def->{NOTNULL}) {
+ push(@statements, "ALTER TABLE $table MODIFY $column"
+ . " NULL");
+ push(@statements, "DROP TRIGGER ${table}_${column}")
+ if $new_def->{TYPE} =~ /varchar|text/i
+ && $old_def->{TYPE} =~ /varchar|text/i;
+ }
+
+ # If we went from not being a PRIMARY KEY to being a PRIMARY KEY.
+ if (!$old_def->{PRIMARYKEY} && $new_def->{PRIMARYKEY}) {
+ push(@statements, "ALTER TABLE $table ADD PRIMARY KEY ($column)");
+ }
+ # If we went from being a PK to not being a PK
+ elsif ( $old_def->{PRIMARYKEY} && !$new_def->{PRIMARYKEY} ) {
+ push(@statements, "ALTER TABLE $table DROP PRIMARY KEY");
+ }
+
+ return @statements;
+}
+
+sub _get_alter_type_sql {
+ my ($self, $table, $column, $new_def, $old_def) = @_;
+ my @statements;
+
+ my $type = $new_def->{TYPE};
+ $type = $self->{db_specific}->{$type}
+ if exists $self->{db_specific}->{$type};
+
+ if ($type =~ /serial/i && $old_def->{TYPE} !~ /serial/i) {
+ die("You cannot specify a DEFAULT on a SERIAL-type column.")
+ if $new_def->{DEFAULT};
+ }
+
+ if ( ($old_def->{TYPE} =~ /LONGTEXT/i && $new_def->{TYPE} !~ /LONGTEXT/i)
+ || ($old_def->{TYPE} !~ /LONGTEXT/i && $new_def->{TYPE} =~ /LONGTEXT/i)
+ ) {
+ # LONG to VARCHAR or VARCHAR to LONG is not allowed in Oracle,
+ # just a way to work around.
+ # Determine whether column_temp is already exist.
+ my $dbh=Bugzilla->dbh;
+ my $column_exist = $dbh->selectcol_arrayref(
+ "SELECT CNAME FROM COL WHERE TNAME = UPPER(?) AND
+ CNAME = UPPER(?)", undef,$table,$column . "_temp");
+ if(!@$column_exist) {
+ push(@statements,
+ "ALTER TABLE $table ADD ${column}_temp $type");
+ }
+ push(@statements, "UPDATE $table SET ${column}_temp = $column");
+ push(@statements, "COMMIT");
+ push(@statements, "ALTER TABLE $table DROP COLUMN $column");
+ push(@statements,
+ "ALTER TABLE $table RENAME COLUMN ${column}_temp TO $column");
+ } else {
+ push(@statements, "ALTER TABLE $table MODIFY $column $type");
+ }
+
+ if ($new_def->{TYPE} =~ /serial/i && $old_def->{TYPE} !~ /serial/i) {
+ push(@statements, _get_create_seq_ddl($table, $column));
+ }
+
+ # If this column is no longer SERIAL, we need to drop the sequence
+ # that went along with it.
+ if ($old_def->{TYPE} =~ /serial/i && $new_def->{TYPE} !~ /serial/i) {
+ push(@statements, "DROP SEQUENCE ${table}_${column}_SEQ");
+ push(@statements, "DROP TRIGGER ${table}_${column}_TR");
+ }
+
+ # If this column is changed to type TEXT/VARCHAR, we need to deal with
+ # empty string.
+ if ( $old_def->{TYPE} !~ /varchar|text/i
+ && $new_def->{TYPE} =~ /varchar|text/i
+ && $new_def->{NOTNULL} )
+ {
+ push (@statements, _get_notnull_trigger_ddl($table, $column));
+ }
+ # If this column is no longer TEXT/VARCHAR, we need to drop the trigger
+ # that went along with it.
+ if ( $old_def->{TYPE} !~ /varchar|text/i
+ && $old_def->{NOTNULL}
+ && $new_def->{TYPE} !~ /varchar|text/i )
+ {
+ push(@statements, "DROP TRIGGER ${table}_${column}");
+ }
+ return @statements;
+}
+
+sub get_rename_column_ddl {
+ my ($self, $table, $old_name, $new_name) = @_;
+ if (lc($old_name) eq lc($new_name)) {
+ # if the only change is a case change, return an empty list.
+ return ();
+ }
+ my @sql = ("ALTER TABLE $table RENAME COLUMN $old_name TO $new_name");
+ my $def = $self->get_column_abstract($table, $old_name);
+ if ($def->{TYPE} =~ /SERIAL/i) {
+ # We have to rename the series also, and fix the default of the series.
+ push(@sql, "RENAME ${table}_${old_name}_SEQ TO
+ ${table}_${new_name}_seq");
+ my $serial_sql =
+ "CREATE OR REPLACE TRIGGER ${table}_${new_name}_TR "
+ . " BEFORE INSERT ON ${table} "
+ . " FOR EACH ROW "
+ . " BEGIN "
+ . " SELECT ${table}_${new_name}_SEQ.NEXTVAL "
+ . " INTO :NEW.${new_name} FROM DUAL; "
+ . " END;";
+ push(@sql, $serial_sql);
+ push(@sql, "DROP TRIGGER ${table}_${old_name}_TR");
+ }
+ if ($def->{TYPE} =~ /varchar|text/i && $def->{NOTNULL} ) {
+ push(@sql, _get_notnull_trigger_ddl($table,$new_name));
+ push(@sql, "DROP TRIGGER ${table}_${old_name}");
+ }
+ return @sql;
+}
+
sub _get_notnull_trigger_ddl {
my ($table, $column) = @_;
projects / thirdparty / bugzilla.git / commitdiff
