join support

[scpubgit/Q-Branch.git] / lib / SQL / Abstract.pm

diff --git a/lib/SQL/Abstract.pm b/lib/SQL/Abstract.pm
index 094c254..b06f0fa 100644 (file)
--- a/lib/SQL/Abstract.pm
+++ b/lib/SQL/Abstract.pm
@@ -208,6 +208,7 @@ sub new {
     (map +($_ => '_expand_op_is'), ('is', 'is_not')),
     ident => '_expand_ident',
     value => '_expand_value',
+    func => '_expand_func',
   };
 
   $opt{expand_op} = {
@@ -266,34 +267,7 @@ sub insert {
 
   my $fields;
 
-  my ($f_aqt, $v_aqt) = do {
-    if (is_literal_value($data)) {
-      (undef, $self->expand_expr($data));
-    } else {
-      my ($fields, $values) = (
-        ref($data) eq 'HASH' ?
-          ([ sort keys %$data ], [ @{$data}{sort keys %$data} ])
-          : ([], $data)
-      );
-
-      # no names (arrayref) means can't generate bindtype
-      !($fields) && $self->{bindtype} eq 'columns'
-        && belch "can't do 'columns' bindtype when called with arrayref";
-
-      +(
-        (@$fields
-          ? $self->expand_expr({ -row => $fields }, -ident)
-          : undef
-        ),
-        +{ -row => [
-          map {
-           local our $Cur_Col_Meta = $fields->[$_];
-           $self->_expand_insert_value($values->[$_])
-           } 0..$#$values
-        ] },
-      );
-    }
-  };
+  my ($f_aqt, $v_aqt) = $self->_expand_insert_values($data);
 
   my @parts = ([ $self->_sqlcase('insert into').' '.$table ]);
   push @parts, [ $self->render_aqt($f_aqt) ] if $f_aqt;
@@ -304,9 +278,37 @@ sub insert {
     push @parts, [ $self->_insert_returning($options) ];
   }
 
-  my ($sql, @bind) = $self->_join_parts(' ', @parts);
+  return $self->_join_parts(' ', @parts);
+}
 
-  return wantarray ? ($sql, @bind) : $sql;
+sub _expand_insert_values {
+  my ($self, $data) = @_;
+  if (is_literal_value($data)) {
+    (undef, $self->expand_expr($data));
+  } else {
+    my ($fields, $values) = (
+      ref($data) eq 'HASH' ?
+        ([ sort keys %$data ], [ @{$data}{sort keys %$data} ])
+        : ([], $data)
+    );
+
+    # no names (arrayref) means can't generate bindtype
+    !($fields) && $self->{bindtype} eq 'columns'
+      && belch "can't do 'columns' bindtype when called with arrayref";
+
+    +(
+      (@$fields
+        ? $self->expand_expr({ -row => $fields }, -ident)
+        : undef
+      ),
+      +{ -row => [
+        map {
+         local our $Cur_Col_Meta = $fields->[$_];
+         $self->_expand_insert_value($values->[$_])
+         } 0..$#$values
+      ] },
+    );
+  }
 }
 
 # So that subclasses can override INSERT ... RETURNING separately from
@@ -536,7 +538,10 @@ sub render_aqt {
 
 sub render_expr {
   my ($self, $expr, $default_scalar_to) = @_;
-  $self->render_aqt($self->expand_expr($expr, $default_scalar_to));
+  my ($sql, @bind) = $self->render_aqt(
+    $self->expand_expr($expr, $default_scalar_to)
+  );
+  return (wantarray ? ($sql, @bind) : $sql);
 }
 
 sub _normalize_op {
@@ -584,6 +589,11 @@ sub _expand_hashpair {
   }
   if ($k =~ /^-/) {
     return $self->_expand_hashpair_op($k, $v);
+  } elsif ($k =~ /^[^\w]/i) {
+    my ($lhs, @rhs) = @$v;
+    return $self->_expand_op(
+      -op, [ $k, $self->expand_expr($lhs, -ident), @rhs ]
+    );
   }
   return $self->_expand_hashpair_ident($k, $v);
 }
@@ -728,7 +738,11 @@ sub _expand_hashpair_op {
         return +{ -op => [ $func, $self->_expand_expr($v) ] };
       }
     }
-    return +{ -func => [ $func, $self->_expand_expr($v) ] };
+    return +{ -func => [
+      $func,
+      map $self->_expand_expr($_),
+        ref($v) eq 'ARRAY' ? @$v : $v
+    ] };
   }
 
   # scalars and literals get simply expanded
@@ -841,6 +855,12 @@ sub _dwim_op_to_is {
   puke(sprintf $fail, $op);
 }
 
+sub _expand_func {
+  my ($self, undef, $args) = @_;
+  my ($func, @args) = @$args;
+  return { -func => [ $func, map $self->expand_expr($_), @args ] };
+}
+
 sub _expand_ident {
   my ($self, undef, $body, $k) = @_;
   return $self->_expand_hashpair_cmp(
@@ -1190,7 +1210,7 @@ sub _join_parts {
   my ($self, $join, @parts) = @_;
   return (
     join($join, map $_->[0], @parts),
-    map @{$_}[1..$#$_], @parts
+    (wantarray ? (map @{$_}[1..$#$_], @parts) : ()),
   );
 }
 
@@ -1255,6 +1275,9 @@ sub _expand_order_by {
 
   return unless defined($arg) and not (ref($arg) eq 'ARRAY' and !@$arg);
 
+  return $self->_expand_maybe_list_expr($arg)
+    if ref($arg) eq 'HASH' and ($arg->{-op}||[''])->[0] eq ',';
+
   my $expander = sub {
     my ($self, $dir, $expr) = @_;
     my @to_expand = ref($expr) eq 'ARRAY' ? @$expr : $expr;
@@ -1340,6 +1363,10 @@ sub _table  {
 
 sub _expand_maybe_list_expr {
   my ($self, $expr, $default) = @_;
+  return { -op => [
+    ',', map $self->expand_expr($_, $default), 
+          @{$expr->{-op}}[1..$#{$expr->{-op}}]
+  ] } if ref($expr) eq 'HASH' and ($expr->{-op}||[''])->[0] eq ',';
   return +{ -op => [ ',',
     map $self->expand_expr($_, $default),
       ref($expr) eq 'ARRAY' ? @$expr : $expr