0.04001, dump_overwrite -> really_erase_my_files

[dbsrgits/DBIx-Class-Schema-Loader.git] / lib / DBIx / Class / Schema / Loader / DBI.pm

diff --git a/lib/DBIx/Class/Schema/Loader/DBI.pm b/lib/DBIx/Class/Schema/Loader/DBI.pm
index 5383a03..6e6dd40 100644 (file)
--- a/lib/DBIx/Class/Schema/Loader/DBI.pm
+++ b/lib/DBIx/Class/Schema/Loader/DBI.pm
@@ -7,7 +7,7 @@ use Class::C3;
 use Carp::Clan qw/^DBIx::Class/;
 use UNIVERSAL::require;
 
-our $VERSION = '0.03999_01';
+our $VERSION = '0.04001';
 
 =head1 NAME
 
@@ -109,12 +109,15 @@ sub _table_columns {
 
     my $sth = $dbh->prepare($self->schema->storage->sql_maker->select($table, undef, \'1 = 0'));
     $sth->execute;
-    return \@{$sth->{NAME_lc}};
+    my $retval = \@{$sth->{NAME_lc}};
+    $sth->finish;
+
+    $retval;
 }
 
 # Returns arrayref of pk col names
 sub _table_pk_info { 
-    my ( $self, $table ) = @_;
+    my ($self, $table) = @_;
 
     my $dbh = $self->schema->storage->dbh;
 
@@ -124,10 +127,41 @@ sub _table_pk_info {
     return \@primary;
 }
 
-# Override this for uniq info
+# Override this for vendor-specific uniq info
 sub _table_uniq_info {
-    warn "No UNIQUE constraint information can be gathered for this vendor";
-    return [];
+    my ($self, $table) = @_;
+
+    my $dbh = $self->schema->storage->dbh;
+    if(!$dbh->can('statistics_info')) {
+        warn "No UNIQUE constraint information can be gathered for this vendor";
+        return [];
+    }
+
+    my %indices;
+    my $sth = $dbh->statistics_info(undef, $self->db_schema, $table, 1, 1);
+    while(my $row = $sth->fetchrow_hashref) {
+        # skip table-level stats, conditional indexes, and any index missing
+        #  critical fields
+        next if $row->{TYPE} eq 'table'
+            || defined $row->{FILTER_CONDITION}
+            || !$row->{INDEX_NAME}
+            || !defined $row->{ORDINAL_POSITION}
+            || !$row->{COLUMN_NAME};
+
+        $indices{$row->{INDEX_NAME}}->{$row->{ORDINAL_POSITION}} = $row->{COLUMN_NAME};
+    }
+    $sth->finish;
+
+    my @retval;
+    foreach my $index_name (keys %indices) {
+        my $index = $indices{$index_name};
+        push(@retval, [ $index_name => [
+            map { $index->{$_} }
+                sort keys %$index
+        ]]);
+    }
+
+    return \@retval;
 }
 
 # Find relationships
@@ -154,6 +188,7 @@ sub _table_fk_info {
         $rels{$relid}->{tbl} = $uk_tbl;
         $rels{$relid}->{cols}->{$uk_col} = $fk_col;
     }
+    $sth->finish;
 
     my @rels;
     foreach my $relid (keys %rels) {
@@ -189,6 +224,7 @@ sub _columns_info_for {
 
                 $result{$col_name} = \%column_info;
             }
+            $sth->finish;
         };
       return \%result if !$@ && scalar keys %result;
     }