X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FSQL%2FAbstract%2FClauses.pm;h=aae578253c87593d73f9e236c3e610b939e4028d;hb=2425a88f522db429f397f6a968aec8f87e421fa6;hp=87aa4e1d3e251c7211d184cebd5d236bf85be59b;hpb=a1f8b6efc03e9f71c39835fe9ae083fc3e386904;p=scpubgit%2FQ-Branch.git

diff --git a/lib/SQL/Abstract/Clauses.pm b/lib/SQL/Abstract/Clauses.pm
index 87aa4e1..aae5782 100644
--- a/lib/SQL/Abstract/Clauses.pm
+++ b/lib/SQL/Abstract/Clauses.pm
@@ -27,8 +27,7 @@ sub register_defaults {
   $self->{expand_clause}{'update.update'} = '_expand_update_clause_target';
   $self->{render_clause}{'update.target'} = sub {
     my ($self, undef, $target) = @_;
-    my ($sql, @bind) = $self->render_aqt($target);
-    ($self->_sqlcase('update ').$sql, @bind);
+    $self->join_query_parts(' ', $self->format_keyword('update'), $target);
   };
   $self->{clauses_of}{delete} = [ qw(target where returning) ];
   $self->{expand}{delete} = sub { shift->_expand_statement(@_) };
@@ -38,33 +37,23 @@ sub register_defaults {
   $self->{expand_clause}{"delete.from"} = '_expand_delete_clause_target';
   $self->{render_clause}{'delete.target'} = sub {
     my ($self, undef, $from) = @_;
-    my ($sql, @bind) = $self->render_aqt($from);
-    ($self->_sqlcase('delete from ').$sql, @bind);
+    $self->join_query_parts(' ', $self->format_keyword('delete from'), $from);
   };
   $self->{clauses_of}{insert} = [
     'target', 'fields', 'from', 'returning'
   ];
   $self->{expand}{insert} = sub { shift->_expand_statement(@_) };
   $self->{render}{insert} = sub { shift->_render_statement(@_) };
+  $self->{expand_clause}{"insert.$_"} = "_expand_insert_clause_$_"
+    for @{$self->{clauses_of}{insert}};
   $self->{expand_clause}{'insert.into'} = '_expand_insert_clause_target';
-  $self->{expand_clause}{'insert.target'} = '_expand_insert_clause_target';
-  $self->{expand_clause}{'insert.fields'} = sub {
-    return +{ -row => [
-      shift->_expand_maybe_list_expr($_[2], -ident)
-    ] } if ref($_[2]) eq 'ARRAY';
-    return $_[2]; # should maybe still expand somewhat?
-  };
-  $self->{expand_clause}{'insert.values'} = '_expand_insert_clause_values';
-  $self->{expand_clause}{'insert.returning'} = sub {
-    shift->_expand_maybe_list_expr(@_, -ident);
-  };
+  $self->{expand_clause}{'insert.values'} = '_expand_insert_clause_from';
   $self->{render_clause}{'insert.fields'} = sub {
     return $_[0]->render_aqt($_[2]);
   };
   $self->{render_clause}{'insert.target'} = sub {
     my ($self, undef, $from) = @_;
-    my ($sql, @bind) = $self->render_aqt($from);
-    ($self->_sqlcase('insert into ').$sql, @bind);
+    $self->join_query_parts(' ', $self->format_keyword('insert into'), $from);
   };
   $self->{render_clause}{'insert.from'} = sub {
     return $_[0]->render_aqt($_[2], 1);
@@ -74,11 +63,21 @@ sub register_defaults {
   $self->{expand}{exists} = sub {
     $_[0]->_expand_op(undef, [ exists => $_[2] ]);
   };
-  $self->{render}{convert_where} = sub {
-    my $self = shift;
-    local $self->{convert_where} = $self->{convert};
-    $self->render_aqt($_[0]);
-  };
+
+  # check for overriden methods
+  if ($self->can('_table') ne SQL::Abstract->can('_table')) {
+    $self->{expand_clause}{'select.from'} = sub {
+      return +{ -literal => [ $_[0]->_table($_[2]) ] };
+    };
+  }
+  if ($self->can('_order_by') ne SQL::Abstract->can('_order_by')) {
+    $self->{expand_clause}{'select.order_by'} = sub {
+      my ($osql, @obind) = $_[0]->_order_by($_[2]);
+      $osql =~ s/^order by //i;
+      return undef unless length($osql);
+      return +{ -literal => [ $osql, @obind ] };
+    };
+  }
   return $self;
 }
 
@@ -94,8 +93,44 @@ sub _expand_select_clause_from {
 
 sub _expand_select_clause_where {
   my ($self, undef, $where) = @_;
-  my $exp = $self->expand_expr($where);
-  +(where => ($self->{convert} ? { -convert_where => $exp } : $exp));
+
+  my $sqla = do {
+    if (my $conv = $self->{convert}) {
+      my $_wrap = sub {
+        my $orig = shift;
+        sub {
+          my $self = shift;
+          +{ -func => [
+            $conv,
+            $self->$orig(@_)
+          ] };
+        };
+      };
+      $self->clone
+           ->wrap_expanders(map +($_ => $_wrap), qw(ident value bind))
+           ->wrap_op_expanders(map +($_ => $_wrap), qw(ident value bind))
+           ->wrap_expander(func => sub {
+               my $orig = shift;
+               sub {
+                 my ($self, $type, $thing) = @_;
+                 if (ref($thing) eq 'ARRAY' and $thing->[0] eq $conv
+                     and @$thing == 2 and ref($thing->[1]) eq 'HASH'
+                     and (
+                       $thing->[1]{-ident}
+                       or $thing->[1]{-value}
+                       or $thing->[1]{-bind})
+                     ) {
+                   return { -func => $thing }; # already went through our expander
+                 }
+                 return $self->$orig($type, $thing);
+               }
+             });
+    } else {
+      $self;
+    }
+  };
+
+  return +(where => $sqla->expand_expr($where));
 }
 
 sub _expand_select_clause_order_by {
@@ -159,23 +194,21 @@ sub _render_statement {
   my @parts;
   foreach my $clause (@{$self->{clauses_of}{$type}}) {
     next unless my $clause_expr = $args->{$clause};
-    my @part = do {
+    my $part = do {
       if (my $rdr = $self->{render_clause}{"${type}.${clause}"}) {
         $self->$rdr($clause, $clause_expr);
       } else {
-        my ($clause_sql, @bind) = $self->render_aqt($clause_expr, 1);
-        my $sql = join ' ',
-          $self->_sqlcase(join ' ', split '_', $clause),
-          $clause_sql;
-        ($sql, @bind);
+        $self->join_query_parts(' ',
+          $self->format_keyword($clause),
+          $self->render_aqt($clause_expr, 1)
+        );
       }
     };
-    push @parts, \@part;
+    push @parts, $part;
   }
-  my ($sql, @bind) = $self->join_query_parts(' ', @parts);
-  return (
-    (our $Render_Top_Level ? $sql : '('.$sql.')'),
-    @bind
+  my $q = $self->join_query_parts(' ', @parts);
+  return $self->join_query_parts('',
+    (our $Render_Top_Level ? $q : ('(', $q, ')'))
   );
 }
 
@@ -187,72 +220,108 @@ sub render_aqt {
 
 sub render_statement {
   my ($self, $expr, $default_scalar_to) = @_;
-  my ($sql, @bind) = $self->render_aqt(
+  @{$self->render_aqt(
     $self->expand_expr($expr, $default_scalar_to), 1
-  );
-  return (wantarray ? ($sql, @bind) : $sql);
+  )};
 }
 
 sub select {
   my ($self, @args) = @_;
+  my $stmt = do {
+    if (ref(my $sel = $args[0]) eq 'HASH') {
+      $sel
+    } else {
+      my %clauses;
+      @clauses{qw(from select where order_by)} = @args;
+
+      # This oddity is to literalify since historically SQLA doesn't quote
+      # a single identifier argument, so we convert it into a literal
+
+      $clauses{select} = { -literal => [ $clauses{select}||'*' ] }
+        unless ref($clauses{select});
+      \%clauses;
+    }
+  };
 
-  return $self->render_statement({ -select => $_[1] }) if ref($_[1]) eq 'HASH';
-
-  my %clauses;
-  @clauses{qw(from select where order_by)} = @args;
-
-  # This oddity is to literalify since historically SQLA doesn't quote
-  # a single identifier argument, so we convert it into a literal
-
-  $clauses{select} = { -literal => [ $clauses{select}||'*' ] }
-    unless ref($clauses{select});
-
-  return $self->render_statement({ -select => \%clauses });
+  my @rendered = $self->render_statement({ -select => $stmt });
+  return wantarray ? @rendered : $rendered[0];
 }
 
 sub update {
   my ($self, $table, $set, $where, $options) = @_;
 
-  return $self->render_statement({ -update => $_[1] }) if ref($_[1]) eq 'HASH';
-
-  my %clauses;
-  @clauses{qw(target set where)} = ($table, $set, $where);
-  puke "Unsupported data type specified to \$sql->update"
-    unless ref($clauses{set}) eq 'HASH';
-  @clauses{keys %$options} = values %$options;
-  return $self->render_statement({ -update => \%clauses });
+  my $stmt = do {
+    if (ref($table) eq 'HASH') {
+      $table
+    } else {
+      my %clauses;
+      @clauses{qw(target set where)} = ($table, $set, $where);
+      puke "Unsupported data type specified to \$sql->update"
+        unless ref($clauses{set}) eq 'HASH';
+      @clauses{keys %$options} = values %$options;
+      \%clauses;
+    }
+  };
+  my @rendered = $self->render_statement({ -update => $stmt });
+  return wantarray ? @rendered : $rendered[0];
 }
 
 sub delete {
   my ($self, $table, $where, $options) = @_;
 
-  return $self->render_statement({ -delete => $_[1] }) if ref($_[1]) eq 'HASH';
-
-  my %clauses = (target => $table, where => $where, %{$options||{}});
-  return $self->render_statement({ -delete => \%clauses });
+  my $stmt = do {
+    if (ref($table) eq 'HASH') {
+      $table;
+    } else {
+      my %clauses = (target => $table, where => $where, %{$options||{}});
+      \%clauses;
+    }
+  };
+  my @rendered = $self->render_statement({ -delete => $stmt });
+  return wantarray ? @rendered : $rendered[0];
 }
 
 sub insert {
   my ($self, $table, $data, $options) = @_;
 
-  return $self->render_statement({ -insert => $_[1] }) if ref($_[1]) eq 'HASH';
-
-  my %clauses = (target => $table, values => $data, %{$options||{}});
-  return $self->render_statement({ -insert => \%clauses });
+  my $stmt = do {
+    if (ref($table) eq 'HASH') {
+      $table;
+    } else {
+      my %clauses = (target => $table, values => $data, %{$options||{}});
+      \%clauses;
+    }
+  };
+  my @rendered = $self->render_statement({ -insert => $stmt });
+  return wantarray ? @rendered : $rendered[0];
 }
 
 sub _expand_insert_clause_target {
   +(target => $_[0]->_expand_maybe_list_expr($_[2], -ident));
 }
 
-sub _expand_insert_clause_values {
+sub _expand_insert_clause_fields {
+  return +{ -row => [
+    $_[0]->_expand_maybe_list_expr($_[2], -ident)
+  ] } if ref($_[2]) eq 'ARRAY';
+  return $_[2]; # should maybe still expand somewhat?
+}
+
+sub _expand_insert_clause_from {
   my ($self, undef, $data) = @_;
   if (ref($data) eq 'HASH' and (keys(%$data))[0] =~ /^-/) {
     return $self->expand_expr($data);
   }
   return $data if ref($data) eq 'HASH' and $data->{-row};
   my ($f_aqt, $v_aqt) = $self->_expand_insert_values($data);
-  return (from => { -values => $v_aqt }, ($f_aqt ? (fields => $f_aqt) : ()));
+  return (
+    from => { -values => [ $v_aqt ] },
+    ($f_aqt ? (fields => $f_aqt) : ()),
+  );
+}
+
+sub _expand_insert_clause_returning {
+  +(returning => $_[0]->_expand_maybe_list_expr($_[2], -ident));
 }
 
 sub _expand_values {
@@ -268,14 +337,14 @@ sub _expand_values {
 
 sub _render_values {
   my ($self, undef, $values) = @_;
-  my ($v_sql, @bind) = $self->join_query_parts(
-    ', ',
-    ref($values) eq 'ARRAY' ? @$values : $values
+  my $inner = $self->join_query_parts(' ',
+    $self->format_keyword('values'),
+    $self->join_query_parts(', ',
+      ref($values) eq 'ARRAY' ? @$values : $values
+    ),
   );
-  my $sql = $self->_sqlcase('values').' '.$v_sql;
-  return (
-    (our $Render_Top_Level ? $sql : '('.$sql.')'),
-    @bind
+  return $self->join_query_parts('',
+    (our $Render_Top_Level ? $inner : ('(', $inner, ')'))
   );
 }
 
@@ -305,15 +374,28 @@ BEGIN {
     eval qq{sub ${singular}s {
       my (\$self, \@args) = \@_;
       while (my (\$this_key, \$this_value) = splice(\@args, 0, 2)) {
-        \$self->{${name}}{\$this_key} = \$this_value;
+        \$self->_ext_rw('${name}', \$this_key, \$this_value);
       }
       return \$self;
     }; 1 } or die "Method builder failed for ${singular}s: $@";
+    eval qq{sub wrap_${singular}s {
+      my (\$self, \@args) = \@_;
+      while (my (\$this_key, \$this_builder) = splice(\@args, 0, 2)) {
+        my \$orig = \$self->_ext_rw('${name}', \$this_key);
+        \$self->_ext_rw(
+          '${name}', \$this_key,
+           \$this_builder->(\$orig, '${name}', \$this_key),
+        );
+      }
+      return \$self;
+    }; 1 } or die "Method builder failed for wrap_${singular}s: $@";
     eval qq{sub ${singular}_list { sort keys %{\$_[0]->{\$name}} }; 1; }
      or die "Method builder failed for ${singular}_list: $@";
   }
 }
 
+sub register_op { $_[0]->{is_op}{$_[1]} = 1; $_[0] }
+
 sub statement_list { sort keys %{$_[0]->{clauses_of}} }
 
 sub clauses_of {