Add overloadable _select_fields method

Consistent with _update_set_values and _insert_values

diff --git a/Changes b/Changes
index 051d029..e2ca8f4 100644 (file)
--- a/Changes
+++ b/Changes
@@ -2,6 +2,7 @@ Revision history for SQL::Abstract
 
     - Remove obsolete documentation about arrayrefref as the $source
       argument for ->select (removed in version 1.74)
+    - Factor out the field list part of SELECT for subclassability (GH#13)
 
 1.85 - 2018-01-27
     - Restore perl version requirement missed in the Distar port

diff --git a/lib/SQL/Abstract.pm b/lib/SQL/Abstract.pm
index d30a7e3..bd512ca 100644 (file)
--- a/lib/SQL/Abstract.pm
+++ b/lib/SQL/Abstract.pm
@@ -464,17 +464,24 @@ sub select {
   my $where  = shift;
   my $order  = shift;
 
-  my($where_sql, @bind) = $self->where($where, $order);
+  my ($fields_sql, @bind) = $self->_select_fields($fields);
 
-  my $f = (ref $fields eq 'ARRAY') ? join ', ', map { $self->_quote($_) } @$fields
-                                   : $fields;
-  my $sql = join(' ', $self->_sqlcase('select'), $f,
+  my ($where_sql, @where_bind) = $self->where($where, $order);
+  push @bind, @where_bind;
+
+  my $sql = join(' ', $self->_sqlcase('select'), $fields_sql,
                       $self->_sqlcase('from'),   $table)
           . $where_sql;
 
   return wantarray ? ($sql, @bind) : $sql;
 }
 
+sub _select_fields {
+  my ($self, $fields) = @_;
+  return ref $fields eq 'ARRAY' ? join ', ', map { $self->_quote($_) } @$fields
+                                : $fields;
+}
+
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 # DELETE
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