X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FSQL%2FAbstract%2FClauses.pm;h=fc36e742f41f5fcbbd818e43799802d4e468d3b6;hb=a01911a20b326afd1a45f97f14aca68206708eba;hp=be8bfa8ff5f4934d7d4f99d58bd9bf3d55945193;hpb=bbe638afe9c153af5e8da3a47d9ef165e76c66d1;p=scpubgit%2FQ-Branch.git

diff --git a/lib/SQL/Abstract/Clauses.pm b/lib/SQL/Abstract/Clauses.pm
index be8bfa8..fc36e74 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
 }
@@ -14,28 +17,135 @@ sub register_defaults {
   $self->{clauses_of}{select} = [ qw(select from where order_by) ];
   $self->{expand}{select} = sub { shift->_expand_statement(@_) };
   $self->{render}{select} = sub { shift->_render_statement(@_) };
-  $self->{expand_clause}{'select.select'} = '_expand_maybe_list_expr';
-  $self->{expand_clause}{'select.from'} = sub {
-    $_[0]->_expand_maybe_list_expr($_[1], -ident)
+  $self->{expand_clause}{"select.$_"} = "_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, $target) = @_;
+    my ($sql, @bind) = $self->render_aqt($target);
+    ($self->_sqlcase('update ').$sql, @bind);
+  };
+  $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, $from) = @_;
+    my ($sql, @bind) = $self->render_aqt($from);
+    ($self->_sqlcase('delete from ').$sql, @bind);
+  };
+  $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.into'} = '_expand_insert_clause_target';
+  $self->{expand_clause}{'insert.target'} = '_expand_insert_clause_target';
+  $self->{expand_clause}{'insert.fields'} = sub {
+    return +{ -row => [
+      shift->_expand_maybe_list_expr(@_, -ident)
+    ] } if ref($_[1]) eq 'ARRAY';
+    return $_[1]; # 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->{render_clause}{'insert.fields'} = sub {
+    return $_[0]->render_aqt($_[1]);
+  };
+  $self->{render_clause}{'insert.target'} = sub {
+    my ($self, $from) = @_;
+    my ($sql, @bind) = $self->render_aqt($from);
+    ($self->_sqlcase('insert into ').$sql, @bind);
+  };
+  $self->{render_clause}{'insert.from'} = sub {
+    return $_[0]->render_aqt($_[1], 1);
+  };
+  $self->{expand}{values} = '_expand_values';
+  $self->{render}{values} = '_render_values';
+  $self->{expand}{exists} = sub {
+    $_[0]->_expand_op(undef, [ exists => $_[2] ]);
   };
-  $self->{expand_clause}{'select.where'} = 'expand_expr';
-  $self->{expand_clause}{'select.order_by'} = '_expand_order_by';
   return $self;
 }
 
+sub _expand_select_clause_select {
+  my ($self, $select) = @_;
+  +(select => $self->_expand_maybe_list_expr($select, -ident));
+}
+
+sub _expand_select_clause_from {
+  my ($self, $from) = @_;
+  +(from => $self->_expand_maybe_list_expr($from, -ident));
+}
+
+sub _expand_select_clause_where {
+  my ($self, $where) = @_;
+  +(where => $self->expand_expr($where));
+}
+
+sub _expand_select_clause_order_by {
+  my ($self, $order_by) = @_;
+  +(order_by => $self->_expand_order_by($order_by));
+}
+
+sub _expand_update_clause_target {
+  my ($self, $target) = @_;
+  +(target => $self->_expand_maybe_list_expr($target, -ident));
+}
+
+sub _expand_update_clause_set {
+  return $_[1] if ref($_[1]) eq 'HASH' and ($_[1]->{-op}||[''])->[0] eq ',';
+  +(set => shift->_expand_update_set_values(@_));
+}
+
+sub _expand_update_clause_where {
+  +(where => shift->expand_expr(@_));
+}
+
+sub _expand_update_clause_returning {
+  +(returning => shift->_expand_maybe_list_expr(@_, -ident));
+}
+
+sub _expand_delete_clause_target {
+  +(target => shift->_expand_maybe_list_expr(@_, -ident));
+}
+
+sub _expand_delete_clause_where { +(where => shift->expand_expr(@_)); }
+
+sub _expand_delete_clause_returning {
+  +(returning => shift->_expand_maybe_list_expr(@_, -ident));
+}
+
 sub _expand_statement {
   my ($self, $type, $args) = @_;
   my $ec = $self->{expand_clause};
-  return +{
-    map +($_ => (do {
+  if ($args->{_}) {
+    $args = { %$args };
+    $args->{$type} = delete $args->{_}
+  }
+  return +{ "-${type}" => +{
+    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
+  } };
 }
 
 sub _render_statement {
@@ -43,14 +153,179 @@ sub _render_statement {
   my @parts;
   foreach my $clause (@{$self->{clauses_of}{$type}}) {
     next unless my $clause_expr = $args->{$clause};
-    my ($sql, @bind) = $self->render_expr($clause_expr);
+    local $self->{convert_where} = $self->{convert} if $clause eq 'where';
+    my ($sql) = my @part = do {
+      if (my $rdr = $self->{render_clause}{"${type}.${clause}"}) {
+        $self->$rdr($clause_expr);
+      } else {
+        my ($clause_sql, @bind) = $self->render_aqt($clause_expr, 1);
+        my $sql = join ' ',
+          $self->_sqlcase(join ' ', split '_', $clause),
+          $clause_sql;
+        ($sql, @bind);
+      }
+    };
     next unless defined($sql) and length($sql);
-    push @parts, [
-      $self->_sqlcase(join ' ', split '_', $clause).' '.$sql,
-      @bind
-    ];
+    push @parts, \@part;
   }
-  return $self->_join_parts(' ', @parts);
+  my ($sql, @bind) = $self->join_clauses(' ', @parts);
+  return (
+    (our $Render_Top_Level ? $sql : '('.$sql.')'),
+    @bind
+  );
+}
+
+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, $default_scalar_to) = @_;
+  my ($sql, @bind) = $self->render_aqt(
+    $self->expand_expr($expr, $default_scalar_to), 1
+  );
+  return (wantarray ? ($sql, @bind) : $sql);
 }
 
+sub select {
+  my ($self, @args) = @_;
+
+  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 $self->render_statement({ -select => \%clauses });
+}
+
+sub update {
+  my ($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 $self->render_statement({ -update => \%clauses });
+}
+
+sub delete {
+  my ($self, $table, $where, $options) = @_;
+
+  return $self->render_statement({ -delete => $_[1] }) if ref($_[1]) eq 'HASH';
+
+  my %clauses = (target => $table, where => $where, %{$options||{}});
+  return $self->render_statement({ -delete => \%clauses });
+}
+
+sub insert {
+  my ($self, $table, $data, $options) = @_;
+
+  return $self->render_statement({ -insert => $_[1] }) if ref($_[1]) eq 'HASH';
+
+  my %clauses = (target => $table, values => $data, %{$options||{}});
+  return $self->render_statement({ -insert => \%clauses });
+}
+
+sub _expand_insert_clause_target {
+  +(target => shift->_expand_maybe_list_expr(@_, -ident));
+}
+
+sub _expand_insert_clause_values {
+  my ($self, $data) = @_;
+  if (ref($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 => $f_aqt) : ()));
+}
+
+sub _expand_values {
+  my ($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, $values) = @_;
+  my ($v_sql, @bind) = $self->join_clauses(
+    ', ',
+    map [ $self->render_aqt($_) ],
+      ref($values) eq 'ARRAY' ? @$values : $values
+  );
+  my $sql = $self->_sqlcase('values').' '.$v_sql;
+  return (
+    (our $Render_Top_Level ? $sql : '('.$sql.')'),
+    @bind
+  );
+}
+
+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 $key = join '_', reverse split '_', $type;
+    my $singular = "${type}er";
+    eval qq{sub ${singular} { shift->_ext_rw($key => \@_) }; 1 }
+      or die "Method builder failed for ${type}er: $@";
+    eval qq{sub ${singular}s {
+      my (\$self, \@args) = \@_;
+      while (my (\$this_key, \$this_value) = splice(\@args, 0, 2)) {
+        \$self->{${key}}{\$this_key} = \$this_value;
+      }
+      return \$self;
+    }; 1 } or die "Method builder failed for ${singular}s: $@";
+  }
+}
+
+sub clauses_of {
+  my ($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;