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=a8e5848185addb2550bb1732ac248ea57a9fc80e;hpb=8e6988ce58468a778753310319cbb04826d66999;p=scpubgit%2FQ-Branch.git

diff --git a/lib/SQL/Abstract/Clauses.pm b/lib/SQL/Abstract/Clauses.pm
index a8e5848..aae5782 100644
--- a/lib/SQL/Abstract/Clauses.pm
+++ b/lib/SQL/Abstract/Clauses.pm
@@ -2,9 +2,12 @@ package SQL::Abstract::Clauses;
 
 use strict;
 use warnings;
+use if $] < '5.010', 'MRO::Compat';
 use mro 'c3';
 use base 'SQL::Abstract';
 
+BEGIN { *puke = \&SQL::Abstract::puke }
+
 sub new {
   shift->next::method(@_)->register_defaults
 }
@@ -13,30 +16,176 @@ sub register_defaults {
   my ($self) = @_;
   $self->{clauses_of}{select} = [ qw(select from where order_by) ];
   $self->{expand}{select} = sub { shift->_expand_statement(@_) };
-  $self->{render}{select} = sub { shift->_render_statement(select => @_) };
-  $self->{expand_clause}{'select.select'} = sub {
-    $_[0]->_expand_maybe_list_expr($_[1], -ident)
+  $self->{render}{select} = sub { shift->_render_statement(@_) };
+  $self->{expand_clause}{"select.$_"} = "_expand_select_clause_$_"
+    for @{$self->{clauses_of}{select}};
+  $self->{clauses_of}{update} = [ qw(target set where returning) ];
+  $self->{expand}{update} = sub { shift->_expand_statement(@_) };
+  $self->{render}{update} = sub { shift->_render_statement(@_) };
+  $self->{expand_clause}{"update.$_"} = "_expand_update_clause_$_"
+    for @{$self->{clauses_of}{update}};
+  $self->{expand_clause}{'update.update'} = '_expand_update_clause_target';
+  $self->{render_clause}{'update.target'} = sub {
+    my ($self, undef, $target) = @_;
+    $self->join_query_parts(' ', $self->format_keyword('update'), $target);
+  };
+  $self->{clauses_of}{delete} = [ qw(target where returning) ];
+  $self->{expand}{delete} = sub { shift->_expand_statement(@_) };
+  $self->{render}{delete} = sub { shift->_render_statement(@_) };
+  $self->{expand_clause}{"delete.$_"} = "_expand_delete_clause_$_"
+    for @{$self->{clauses_of}{delete}};
+  $self->{expand_clause}{"delete.from"} = '_expand_delete_clause_target';
+  $self->{render_clause}{'delete.target'} = sub {
+    my ($self, undef, $from) = @_;
+    $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.values'} = '_expand_insert_clause_from';
+  $self->{render_clause}{'insert.fields'} = sub {
+    return $_[0]->render_aqt($_[2]);
   };
-  $self->{expand_clause}{'select.from'} = sub {
-    $_[0]->_expand_maybe_list_expr($_[1], -ident)
+  $self->{render_clause}{'insert.target'} = sub {
+    my ($self, undef, $from) = @_;
+    $self->join_query_parts(' ', $self->format_keyword('insert into'), $from);
   };
-  $self->{expand_clause}{'select.where'} = 'expand_expr';
-  $self->{expand_clause}{'select.order_by'} = '_expand_order_by';
+  $self->{render_clause}{'insert.from'} = sub {
+    return $_[0]->render_aqt($_[2], 1);
+  };
+  $self->{expand}{values} = '_expand_values';
+  $self->{render}{values} = '_render_values';
+  $self->{expand}{exists} = sub {
+    $_[0]->_expand_op(undef, [ exists => $_[2] ]);
+  };
+
+  # check for overriden methods
+  if ($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;
 }
 
+sub _expand_select_clause_select {
+  my ($self, undef, $select) = @_;
+  +(select => $self->_expand_maybe_list_expr($select, -ident));
+}
+
+sub _expand_select_clause_from {
+  my ($self, undef, $from) = @_;
+  +(from => $self->_expand_maybe_list_expr($from, -ident));
+}
+
+sub _expand_select_clause_where {
+  my ($self, undef, $where) = @_;
+
+  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 {
+  my ($self, undef, $order_by) = @_;
+  +(order_by => $self->_expand_order_by($order_by));
+}
+
+sub _expand_update_clause_target {
+  my ($self, undef, $target) = @_;
+  +(target => $self->_expand_maybe_list_expr($target, -ident));
+}
+
+sub _expand_update_clause_set {
+  return $_[2] if ref($_[2]) eq 'HASH' and ($_[2]->{-op}||[''])->[0] eq ',';
+  +(set => $_[0]->_expand_update_set_values($_[1], $_[2]));
+}
+
+sub _expand_update_clause_where {
+  +(where => $_[0]->expand_expr($_[2]));
+}
+
+sub _expand_update_clause_returning {
+  +(returning => $_[0]->_expand_maybe_list_expr($_[2], -ident));
+}
+
+sub _expand_delete_clause_target {
+  +(target => $_[0]->_expand_maybe_list_expr($_[2], -ident));
+}
+
+sub _expand_delete_clause_where { +(where => $_[0]->expand_expr($_[2])); }
+
+sub _expand_delete_clause_returning {
+  +(returning => $_[0]->_expand_maybe_list_expr($_[2], -ident));
+}
+
 sub _expand_statement {
   my ($self, $type, $args) = @_;
   my $ec = $self->{expand_clause};
+  if ($args->{_}) {
+    $args = { %$args };
+    $args->{$type} = delete $args->{_}
+  }
   return +{ "-${type}" => +{
-    map +($_ => (do {
+    map {
       my $val = $args->{$_};
       if (defined($val) and my $exp = $ec->{"${type}.$_"}) {
-        $self->$exp($val);
+        if ((my (@exp) = $self->$exp($_ => $val)) == 1) {
+          ($_ => $exp[0])
+        } else {
+          @exp
+        }
       } else {
-        $val;
+        ($_ => $self->expand_expr($val))
       }
-    })), sort keys %$args
+    } sort keys %$args
   } };
 }
 
@@ -45,30 +194,234 @@ sub _render_statement {
   my @parts;
   foreach my $clause (@{$self->{clauses_of}{$type}}) {
     next unless my $clause_expr = $args->{$clause};
-    local $self->{convert_where} = $self->{convert} if $clause eq 'where';
-    my ($sql, @bind) = $self->render_aqt($clause_expr);
-    next unless defined($sql) and length($sql);
-    push @parts, [
-      $self->_sqlcase(join ' ', split '_', $clause).' '.$sql,
-      @bind
-    ];
+    my $part = do {
+      if (my $rdr = $self->{render_clause}{"${type}.${clause}"}) {
+        $self->$rdr($clause, $clause_expr);
+      } else {
+        $self->join_query_parts(' ',
+          $self->format_keyword($clause),
+          $self->render_aqt($clause_expr, 1)
+        );
+      }
+    };
+    push @parts, $part;
   }
-  return $self->_join_parts(' ', @parts);
+  my $q = $self->join_query_parts(' ', @parts);
+  return $self->join_query_parts('',
+    (our $Render_Top_Level ? $q : ('(', $q, ')'))
+  );
+}
+
+sub render_aqt {
+  my ($self, $aqt, $top_level) = @_;
+  local our $Render_Top_Level = $top_level;
+  return $self->next::method($aqt);
+}
+
+sub render_statement {
+  my ($self, $expr, $default_scalar_to) = @_;
+  @{$self->render_aqt(
+    $self->expand_expr($expr, $default_scalar_to), 1
+  )};
 }
 
 sub select {
   my ($self, @args) = @_;
-  my %clauses;
-  @clauses{qw(from select where order_by)} = @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
+      # This oddity is to literalify since historically SQLA doesn't quote
+      # a single identifier argument, so we convert it into a literal
 
-  unless (ref(my $select = $clauses{select}||'*')) {
-    $clauses{select} = \$select;
+      $clauses{select} = { -literal => [ $clauses{select}||'*' ] }
+        unless ref($clauses{select});
+      \%clauses;
+    }
+  };
+
+  my @rendered = $self->render_statement({ -select => $stmt });
+  return wantarray ? @rendered : $rendered[0];
+}
+
+sub update {
+  my ($self, $table, $set, $where, $options) = @_;
+
+  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) = @_;
+
+  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) = @_;
+
+  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_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);
   }
-  my ($sql, @bind) = $self->render_expr({ -select => \%clauses });
-  return wantarray ? ($sql, @bind) : $sql;
+  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) : ()),
+  );
+}
+
+sub _expand_insert_clause_returning {
+  +(returning => $_[0]->_expand_maybe_list_expr($_[2], -ident));
+}
+
+sub _expand_values {
+  my ($self, undef, $values) = @_;
+  return { -values => [
+    map +(
+      ref($_) eq 'HASH'
+        ? $self->expand_expr($_)
+        : +{ -row => [ map $self->expand_expr($_), @$_ ] }
+    ), ref($values) eq 'ARRAY' ? @$values : $values
+  ] };
+}
+
+sub _render_values {
+  my ($self, undef, $values) = @_;
+  my $inner = $self->join_query_parts(' ',
+    $self->format_keyword('values'),
+    $self->join_query_parts(', ',
+      ref($values) eq 'ARRAY' ? @$values : $values
+    ),
+  );
+  return $self->join_query_parts('',
+    (our $Render_Top_Level ? $inner : ('(', $inner, ')'))
+  );
+}
+
+sub _ext_rw {
+  my ($self, $name, $key, $value) = @_;
+  return $self->{$name}{$key} unless @_ > 3;
+  $self->{$name}{$key} = $value;
+  return $self;
+}
+
+BEGIN {
+  foreach my $type (qw(
+    expand op_expand render op_render clause_expand clause_render
+  )) {
+    my $name = join '_', reverse split '_', $type;
+    my $singular = "${type}er";
+    eval qq{sub ${singular} { shift->_ext_rw($name => \@_) }; 1 }
+      or die "Method builder failed for ${singular}: $@";
+    eval qq{sub wrap_${singular} {
+      my (\$self, \$key, \$builder) = \@_;
+      my \$orig = \$self->_ext_rw('${name}', \$key);
+      \$self->_ext_rw(
+        '${name}', \$key,
+        \$builder->(\$orig, '${name}', \$key)
+      );
+    }; 1 } or die "Method builder failed for wrap_${singular}: $@";
+    eval qq{sub ${singular}s {
+      my (\$self, \@args) = \@_;
+      while (my (\$this_key, \$this_value) = splice(\@args, 0, 2)) {
+        \$self->_ext_rw('${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 {
+  my ($self, $of, @clauses) = @_;
+  unless (@clauses) {
+    return @{$self->{clauses_of}{$of}||[]};
+  }
+  if (ref($clauses[0]) eq 'CODE') {
+    @clauses = $self->${\($clauses[0])}(@{$self->{clauses_of}{$of}||[]});
+  }
+  $self->{clauses_of}{$of} = \@clauses;
+  return $self;
+}
+
+sub clone {
+  my ($self) = @_;
+  bless(
+    {
+      (map +($_ => (
+        ref($self->{$_}) eq 'HASH'
+          ? { %{$self->{$_}} }
+          : $self->{$_}
+      )), keys %$self),
+    },
+    ref($self)
+  );
 }
 
 1;