From: Matt S Trout <mst@shadowcat.co.uk>
Date: Mon, 23 Sep 2019 01:14:20 +0000 (+0000)
Subject: accidentally committed this, never mind
X-Git-Tag: v1.90_01~102
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=d0dfc8334a05db996dc53b488fd7045032d154d2;p=dbsrgits%2FSQL-Abstract.git

accidentally committed this, never mind
---

diff --git a/lib/DBIx/Class/SQLMaker.pm b/lib/DBIx/Class/SQLMaker.pm
deleted file mode 100644
index a96aa64..0000000
--- a/lib/DBIx/Class/SQLMaker.pm
+++ /dev/null
@@ -1,548 +0,0 @@
-package DBIx::Class::SQLMaker;
-
-use strict;
-use warnings;
-
-=head1 NAME
-
-DBIx::Class::SQLMaker - An SQL::Abstract-based SQL maker class
-
-=head1 DESCRIPTION
-
-This module is a subclass of L<SQL::Abstract> and includes a number of
-DBIC-specific workarounds, not yet suitable for inclusion into the
-L<SQL::Abstract> core. It also provides all (and more than) the functionality
-of L<SQL::Abstract::Limit>, see L<DBIx::Class::SQLMaker::LimitDialects> for
-more info.
-
-Currently the enhancements to L<SQL::Abstract> are:
-
-=over
-
-=item * Support for C<JOIN> statements (via extended C<table/from> support)
-
-=item * Support of functions in C<SELECT> lists
-
-=item * C<GROUP BY>/C<HAVING> support (via extensions to the order_by parameter)
-
-=item * Support of C<...FOR UPDATE> type of select statement modifiers
-
-=back
-
-=cut
-
-use base qw/
-  DBIx::Class::SQLMaker::LimitDialects
-  SQL::Abstract
-  DBIx::Class
-/;
-use mro 'c3';
-
-use Sub::Name 'subname';
-use DBIx::Class::Carp;
-use namespace::clean;
-
-__PACKAGE__->mk_group_accessors (simple => qw/quote_char name_sep limit_dialect/);
-
-sub _quoting_enabled {
-  ( defined $_[0]->{quote_char} and length $_[0]->{quote_char} ) ? 1 : 0
-}
-
-# for when I need a normalized l/r pair
-sub _quote_chars {
-
-  # in case we are called in the old !!$sm->_quote_chars fashion
-  return () if !wantarray and ( ! defined $_[0]->{quote_char} or ! length $_[0]->{quote_char} );
-
-  map
-    { defined $_ ? $_ : '' }
-    ( ref $_[0]->{quote_char} ? (@{$_[0]->{quote_char}}) : ( ($_[0]->{quote_char}) x 2 ) )
-  ;
-}
-
-# FIXME when we bring in the storage weaklink, check its schema
-# weaklink and channel through $schema->throw_exception
-sub throw_exception { DBIx::Class::Exception->throw($_[1]) }
-
-BEGIN {
-  # reinstall the belch()/puke() functions of SQL::Abstract with custom versions
-  # that use DBIx::Class::Carp/DBIx::Class::Exception instead of plain Carp
-  no warnings qw/redefine/;
-
-  *SQL::Abstract::belch = subname 'SQL::Abstract::belch' => sub (@) {
-    my($func) = (caller(1))[3];
-    carp "[$func] Warning: ", @_;
-  };
-
-  *SQL::Abstract::puke = subname 'SQL::Abstract::puke' => sub (@) {
-    my($func) = (caller(1))[3];
-    __PACKAGE__->throw_exception("[$func] Fatal: " . join ('',  @_));
-  };
-}
-
-# the "oh noes offset/top without limit" constant
-# limited to 31 bits for sanity (and consistency,
-# since it may be handed to the like of sprintf %u)
-#
-# Also *some* builds of SQLite fail the test
-#   some_column BETWEEN ? AND ?: 1, 4294967295
-# with the proper integer bind attrs
-#
-# Implemented as a method, since ::Storage::DBI also
-# refers to it (i.e. for the case of software_limit or
-# as the value to abuse with MSSQL ordered subqueries)
-sub __max_int () { 0x7FFFFFFF };
-
-# we ne longer need to check this - DBIC has ways of dealing with it
-# specifically ::Storage::DBI::_resolve_bindattrs()
-sub _assert_bindval_matches_bindtype () { 1 };
-
-# poor man's de-qualifier
-sub _quote {
-  $_[0]->next::method( ( $_[0]{_dequalify_idents} and ! ref $_[1] )
-    ? $_[1] =~ / ([^\.]+) $ /x
-    : $_[1]
-  );
-}
-
-sub _where_op_NEST {
-  carp_unique ("-nest in search conditions is deprecated, you most probably wanted:\n"
-      .q|{..., -and => [ \%cond0, \@cond1, \'cond2', \[ 'cond3', [ col => bind ] ], etc. ], ... }|
-  );
-
-  shift->next::method(@_);
-}
-
-# Handle limit-dialect selection
-sub select {
-  my ($self, $table, $fields, $where, $rs_attrs, $limit, $offset) = @_;
-
-
-  ($fields, @{$self->{select_bind}}) = $self->_recurse_fields($fields);
-
-  if (defined $offset) {
-    $self->throw_exception('A supplied offset must be a non-negative integer')
-      if ( $offset =~ /\D/ or $offset < 0 );
-  }
-  $offset ||= 0;
-
-  if (defined $limit) {
-    $self->throw_exception('A supplied limit must be a positive integer')
-      if ( $limit =~ /\D/ or $limit <= 0 );
-  }
-  elsif ($offset) {
-    $limit = $self->__max_int;
-  }
-
-
-  my ($sql, @bind);
-  if ($limit) {
-    # this is legacy code-flow from SQLA::Limit, it is not set in stone
-    ($sql, @bind) = $self->next::method ($table, $fields, $where);
-
-    my $limiter;
-
-    if( $limiter = $self->can ('emulate_limit') ) {
-      carp_unique(
-        'Support for the legacy emulate_limit() mechanism inherited from '
-      . 'SQL::Abstract::Limit has been deprecated, and will be removed when '
-      . 'DBIC transitions to Data::Query. If your code uses this type of '
-      . 'limit specification please file an RT and provide the source of '
-      . 'your emulate_limit() implementation, so an acceptable upgrade-path '
-      . 'can be devised'
-      );
-    }
-    else {
-      my $dialect = $self->limit_dialect
-        or $self->throw_exception( "Unable to generate SQL-limit - no limit dialect specified on $self" );
-
-      $limiter = $self->can ("_$dialect")
-        or $self->throw_exception(__PACKAGE__ . " does not implement the requested dialect '$dialect'");
-    }
-
-    $sql = $self->$limiter (
-      $sql,
-      { %{$rs_attrs||{}}, _selector_sql => $fields },
-      $limit,
-      $offset
-    );
-  }
-  else {
-    ($sql, @bind) = $self->next::method ($table, $fields, $where, $rs_attrs);
-  }
-
-  push @{$self->{where_bind}}, @bind;
-
-# this *must* be called, otherwise extra binds will remain in the sql-maker
-  my @all_bind = $self->_assemble_binds;
-
-  $sql .= $self->_lock_select ($rs_attrs->{for})
-    if $rs_attrs->{for};
-
-  return wantarray ? ($sql, @all_bind) : $sql;
-}
-
-sub _assemble_binds {
-  my $self = shift;
-  return map { @{ (delete $self->{"${_}_bind"}) || [] } } (qw/pre_select select from where group having order limit/);
-}
-
-my $for_syntax = {
-  update => 'FOR UPDATE',
-  shared => 'FOR SHARE',
-};
-sub _lock_select {
-  my ($self, $type) = @_;
-
-  my $sql;
-  if (ref($type) eq 'SCALAR') {
-    $sql = "FOR $$type";
-  }
-  else {
-    $sql = $for_syntax->{$type} || $self->throw_exception( "Unknown SELECT .. FOR type '$type' requested" );
-  }
-
-  return " $sql";
-}
-
-# Handle default inserts
-sub insert {
-# optimized due to hotttnesss
-#  my ($self, $table, $data, $options) = @_;
-
-  # SQLA will emit INSERT INTO $table ( ) VALUES ( )
-  # which is sadly understood only by MySQL. Change default behavior here,
-  # until SQLA2 comes with proper dialect support
-  if (! $_[2] or (ref $_[2] eq 'HASH' and !keys %{$_[2]} ) ) {
-    my @bind;
-    my $sql = sprintf(
-      'INSERT INTO %s DEFAULT VALUES', $_[0]->_quote($_[1])
-    );
-
-    if ( ($_[3]||{})->{returning} ) {
-      my $s;
-      ($s, @bind) = $_[0]->_insert_returning ($_[3]);
-      $sql .= $s;
-    }
-
-    return ($sql, @bind);
-  }
-
-  next::method(@_);
-}
-
-sub _recurse_fields {
-  my ($self, $fields) = @_;
-  my $ref = ref $fields;
-  return $self->_quote($fields) unless $ref;
-  return $$fields if $ref eq 'SCALAR';
-
-  if ($ref eq 'ARRAY') {
-    my (@select, @bind);
-    for my $field (@$fields) {
-      my ($select, @new_bind) = $self->_recurse_fields($field);
-      push @select, $select;
-      push @bind, @new_bind;
-    }
-    return (join(', ', @select), @bind);
-  }
-  elsif ($ref eq 'HASH') {
-    my %hash = %$fields;  # shallow copy
-
-    my $as = delete $hash{-as};   # if supplied
-
-    my ($func, $rhs, @toomany) = %hash;
-
-    # there should be only one pair
-    if (@toomany) {
-      $self->throw_exception( "Malformed select argument - too many keys in hash: " . join (',', keys %$fields ) );
-    }
-
-    if (lc ($func) eq 'distinct' && ref $rhs eq 'ARRAY' && @$rhs > 1) {
-      $self->throw_exception (
-        'The select => { distinct => ... } syntax is not supported for multiple columns.'
-       .' Instead please use { group_by => [ qw/' . (join ' ', @$rhs) . '/ ] }'
-       .' or { select => [ qw/' . (join ' ', @$rhs) . '/ ], distinct => 1 }'
-      );
-    }
-
-    my ($rhs_sql, @rhs_bind) = $self->_recurse_fields($rhs);
-    my $select = sprintf ('%s( %s )%s',
-      $self->_sqlcase($func),
-      $rhs_sql,
-      $as
-        ? sprintf (' %s %s', $self->_sqlcase('as'), $self->_quote ($as) )
-        : ''
-    );
-
-    return ($select, @rhs_bind);
-  }
-  elsif ( $ref eq 'REF' and ref($$fields) eq 'ARRAY' ) {
-    return @{$$fields};
-  }
-  else {
-    $self->throw_exception( $ref . qq{ unexpected in _recurse_fields()} );
-  }
-}
-
-
-# this used to be a part of _order_by but is broken out for clarity.
-# What we have been doing forever is hijacking the $order arg of
-# SQLA::select to pass in arbitrary pieces of data (first the group_by,
-# then pretty much the entire resultset attr-hash, as more and more
-# things in the SQLA space need to have more info about the $rs they
-# create SQL for. The alternative would be to keep expanding the
-# signature of _select with more and more positional parameters, which
-# is just gross. All hail SQLA2!
-sub _parse_rs_attrs {
-  my ($self, $arg) = @_;
-
-  my $sql = '';
-
-  if ($arg->{group_by}) {
-    if ( my ($group_sql, @group_bind) = $self->_recurse_fields($arg->{group_by}) ) {
-      $sql .= $self->_sqlcase(' group by ') . $group_sql;
-      push @{$self->{group_bind}}, @group_bind;
-    }
-  }
-
-  if (defined $arg->{having}) {
-    my ($frag, @bind) = $self->_recurse_where($arg->{having});
-    push(@{$self->{having_bind}}, @bind);
-    $sql .= $self->_sqlcase(' having ') . $frag;
-  }
-
-  if (defined $arg->{order_by}) {
-    $sql .= $self->_order_by ($arg->{order_by});
-  }
-
-  return $sql;
-}
-
-sub _order_by {
-  my ($self, $arg) = @_;
-
-  # check that we are not called in legacy mode (order_by as 4th argument)
-  if (ref $arg eq 'HASH' and not grep { $_ =~ /^-(?:desc|asc)/i } keys %$arg ) {
-    return $self->_parse_rs_attrs ($arg);
-  }
-  else {
-    my ($sql, @bind) = $self->next::method($arg);
-    push @{$self->{order_bind}}, @bind;
-    return $sql;
-  }
-}
-
-sub _split_order_chunk {
-  my ($self, $chunk) = @_;
-
-  # strip off sort modifiers, but always succeed, so $1 gets reset
-  $chunk =~ s/ (?: \s+ (ASC|DESC) )? \s* $//ix;
-
-  return (
-    $chunk,
-    ( $1 and uc($1) eq 'DESC' ) ? 1 : 0,
-  );
-}
-
-sub _table {
-# optimized due to hotttnesss
-#  my ($self, $from) = @_;
-  if (my $ref = ref $_[1] ) {
-    if ($ref eq 'ARRAY') {
-      return $_[0]->_recurse_from(@{$_[1]});
-    }
-    elsif ($ref eq 'HASH') {
-      return $_[0]->_recurse_from($_[1]);
-    }
-    elsif ($ref eq 'REF' && ref ${$_[1]} eq 'ARRAY') {
-      my ($sql, @bind) = @{ ${$_[1]} };
-      push @{$_[0]->{from_bind}}, @bind;
-      return $sql
-    }
-  }
-  return $_[0]->next::method ($_[1]);
-}
-
-sub _generate_join_clause {
-    my ($self, $join_type) = @_;
-
-    $join_type = $self->{_default_jointype}
-      if ! defined $join_type;
-
-    return sprintf ('%s JOIN ',
-      $join_type ?  $self->_sqlcase($join_type) : ''
-    );
-}
-
-sub _recurse_from {
-  my $self = shift;
-  return join (' ', $self->_gen_from_blocks(@_) );
-}
-
-sub _gen_from_blocks {
-  my ($self, $from, @joins) = @_;
-
-  my @fchunks = $self->_from_chunk_to_sql($from);
-
-  for (@joins) {
-    my ($to, $on) = @$_;
-
-    # check whether a join type exists
-    my $to_jt = ref($to) eq 'ARRAY' ? $to->[0] : $to;
-    my $join_type;
-    if (ref($to_jt) eq 'HASH' and defined($to_jt->{-join_type})) {
-      $join_type = $to_jt->{-join_type};
-      $join_type =~ s/^\s+ | \s+$//xg;
-    }
-
-    my @j = $self->_generate_join_clause( $join_type );
-
-    if (ref $to eq 'ARRAY') {
-      push(@j, '(', $self->_recurse_from(@$to), ')');
-    }
-    else {
-      push(@j, $self->_from_chunk_to_sql($to));
-    }
-
-    my ($sql, @bind) = $self->_join_condition($on);
-    push(@j, ' ON ', $sql);
-    push @{$self->{from_bind}}, @bind;
-
-    push @fchunks, join '', @j;
-  }
-
-  return @fchunks;
-}
-
-sub _from_chunk_to_sql {
-  my ($self, $fromspec) = @_;
-
-  return join (' ', do {
-    if (! ref $fromspec) {
-      $self->_quote($fromspec);
-    }
-    elsif (ref $fromspec eq 'SCALAR') {
-      $$fromspec;
-    }
-    elsif (ref $fromspec eq 'REF' and ref $$fromspec eq 'ARRAY') {
-      push @{$self->{from_bind}}, @{$$fromspec}[1..$#$$fromspec];
-      $$fromspec->[0];
-    }
-    elsif (ref $fromspec eq 'HASH') {
-      my ($as, $table, $toomuch) = ( map
-        { $_ => $fromspec->{$_} }
-        ( grep { $_ !~ /^\-/ } keys %$fromspec )
-      );
-
-      $self->throw_exception( "Only one table/as pair expected in from-spec but an exra '$toomuch' key present" )
-        if defined $toomuch;
-
-      ($self->_from_chunk_to_sql($table), $self->_quote($as) );
-    }
-    else {
-      $self->throw_exception('Unsupported from refkind: ' . ref $fromspec );
-    }
-  });
-}
-
-sub _join_condition {
-  my ($self, $cond) = @_;
-
-  # Backcompat for the old days when a plain hashref
-  # { 't1.col1' => 't2.col2' } meant ON t1.col1 = t2.col2
-  if (
-    ref $cond eq 'HASH'
-      and
-    keys %$cond == 1
-      and
-    (keys %$cond)[0] =~ /\./
-      and
-    ! ref ( (values %$cond)[0] )
-  ) {
-    carp_unique(
-      "ResultSet {from} structures with conditions not conforming to the "
-    . "SQL::Abstract syntax are deprecated: you either need to stop abusing "
-    . "{from} altogether, or express the condition properly using the "
-    . "{ -ident => ... } operator"
-    );
-    $cond = { keys %$cond => { -ident => values %$cond } }
-  }
-  elsif ( ref $cond eq 'ARRAY' ) {
-    # do our own ORing so that the hashref-shim above is invoked
-    my @parts;
-    my @binds;
-    foreach my $c (@$cond) {
-      my ($sql, @bind) = $self->_join_condition($c);
-      push @binds, @bind;
-      push @parts, $sql;
-    }
-    return join(' OR ', @parts), @binds;
-  }
-
-  return $self->_recurse_where($cond);
-}
-
-# This is hideously ugly, but SQLA does not understand multicol IN expressions
-# FIXME TEMPORARY - DQ should have native syntax for this
-# moved here to raise API questions
-#
-# !!! EXPERIMENTAL API !!! WILL CHANGE !!!
-sub _where_op_multicolumn_in {
-  my ($self, $lhs, $rhs) = @_;
-
-  if (! ref $lhs or ref $lhs eq 'ARRAY') {
-    my (@sql, @bind);
-    for (ref $lhs ? @$lhs : $lhs) {
-      if (! ref $_) {
-        push @sql, $self->_quote($_);
-      }
-      elsif (ref $_ eq 'SCALAR') {
-        push @sql, $$_;
-      }
-      elsif (ref $_ eq 'REF' and ref $$_ eq 'ARRAY') {
-        my ($s, @b) = @$$_;
-        push @sql, $s;
-        push @bind, @b;
-      }
-      else {
-        $self->throw_exception("ARRAY of @{[ ref $_ ]}es unsupported for multicolumn IN lhs...");
-      }
-    }
-    $lhs = \[ join(', ', @sql), @bind];
-  }
-  elsif (ref $lhs eq 'SCALAR') {
-    $lhs = \[ $$lhs ];
-  }
-  elsif (ref $lhs eq 'REF' and ref $$lhs eq 'ARRAY' ) {
-    # noop
-  }
-  else {
-    $self->throw_exception( ref($lhs) . "es unsupported for multicolumn IN lhs...");
-  }
-
-  # is this proper...?
-  $rhs = \[ $self->_recurse_where($rhs) ];
-
-  for ($lhs, $rhs) {
-    $$_->[0] = "( $$_->[0] )"
-      unless $$_->[0] =~ /^ \s* \( .* \) \s* $/xs;
-  }
-
-  \[ join( ' IN ', shift @$$lhs, shift @$$rhs ), @$$lhs, @$$rhs ];
-}
-
-=head1 FURTHER QUESTIONS?
-
-Check the list of L<additional DBIC resources|DBIx::Class/GETTING HELP/SUPPORT>.
-
-=head1 COPYRIGHT AND LICENSE
-
-This module is free software L<copyright|DBIx::Class/COPYRIGHT AND LICENSE>
-by the L<DBIx::Class (DBIC) authors|DBIx::Class/AUTHORS>. You can
-redistribute it and/or modify it under the same terms as the
-L<DBIx::Class library|DBIx::Class/COPYRIGHT AND LICENSE>.
-
-=cut
-
-1;