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package SOOT::SQL2Tree; |
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22907
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use 5.008001; |
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use strict; |
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use warnings; |
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our $VERSION = '0.02'; |
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use Carp qw(croak); |
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use DBI; |
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20157
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use SOOT; |
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use Scalar::Util qw(blessed); |
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use File::Temp qw(); |
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require Exporter; |
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our @ISA = qw(Exporter); |
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our @EXPORT_OK = qw( |
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sql2tree |
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); |
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our @EXPORT_TAGS = ( |
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'all' => \@EXPORT_OK, |
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); |
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our @EXPORT; |
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if (caller() and (caller())[1] eq '-e') { |
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SOOT::Init(1); |
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push @EXPORT, @EXPORT_OK; |
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SOOT->export_to_level(1, ':all'); |
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} |
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our %Types = ( |
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'char' => { |
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name => 'char', |
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root_type => 'C', |
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}, |
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'int' => { |
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name => 'int', |
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root_type => 'I', |
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}, |
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'bigint' => { |
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name => 'bigint', |
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root_type => 'L', |
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}, |
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'uint' => { |
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name => 'uint', |
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root_type => 'i', |
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}, |
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'ubigint' => { |
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name => 'ubigint', |
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root_type => 'l', |
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}, |
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'float' => { |
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name => 'float', |
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root_type => 'F', |
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}, |
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'double' => { |
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name => 'double', |
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root_type => 'D', |
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}, |
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); |
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our %Typemap = qw( |
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char char |
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varchar char |
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int int |
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integer int |
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smallint int |
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smallinteger int |
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tinyint int |
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tinyinteger int |
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bigint bigint |
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biginteger bigint |
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float float |
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double double |
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decimal double |
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); |
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use Class::XSAccessor { |
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lvalue_accessors => [qw(dbh name title colmaps coltypes)], |
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}; |
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sub new { |
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my $class = shift; |
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my %opt = @_; |
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foreach my $param (qw(dbh)) { |
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ref($opt{$param}) |
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or croak("Need '$param' parameter"); |
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} |
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my $self = bless { |
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colmaps => {}, |
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coltypes => {}, |
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name => undef, |
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title => undef, |
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%opt, |
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} => $class; |
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} |
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sub make_tree { |
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my $self = shift; |
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my $sql = shift; |
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croak("Need some SQL to make a tree") if not defined $sql; |
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my $binds = shift; |
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my $attrs = shift; |
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my $colmaps = $self->colmaps; |
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my $coltypes = $self->coltypes; |
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my $sth = $self->dbh->prepare($sql); |
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$sth->execute(@{$binds||[]}); |
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my $name = $sth->{NAME}; |
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my @root_names = map {$_ = lc($_); s/[^a-z_0-9]+//g; $_} @$name; |
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my @root_types; |
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my $type = $sth->{TYPE}; |
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foreach my $i (0 .. $#{ $type }) { |
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if (exists $coltypes->{ $name->[$i] }) { |
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push @root_types, $self->_find_root_type($coltypes->{ $name->[$i] }); |
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} |
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elsif (not ref($type->[$i]) and $type->[$i] =~ /^\d+$/) { |
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my $typeinfo = $self->dbh->type_info($type->[$i]); |
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push @root_types, $self->_find_root_type($typeinfo->{TYPE_NAME}); |
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} |
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else { |
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push @root_types, $self->_find_root_type($type->[$i]); |
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} |
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} |
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137
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my @root_cols; |
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foreach my $i (0..$#root_names) { |
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push @root_cols, $root_names[$i]."/".$root_types[$i]{root_type}; |
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} |
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my $root_header = join(':', @root_cols); |
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my $treename = $self->name; |
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my $treetitle = $self->title; |
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$treetitle = $treename if not defined $treetitle; |
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my @colmaps = map $colmaps->{$_}, @$name; |
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@colmaps = () if not grep defined, @colmaps; |
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149
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# FIXME This should be possible to stuff into a TTree directly, but my |
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# dynamic ROOT/XS/XS++/CInt fu fails me on that at this point. |
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# Python must be better at *something*! |
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my $tfh = File::Temp->new(CLEANUP => 1); |
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if (@colmaps) { |
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while (my $row = $sth->fetchrow_arrayref) { |
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print $tfh join("\t", @$row), "\n"; |
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} |
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} |
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else { |
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while (my $row = $sth->fetchrow_arrayref) { |
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for (0..$#colmaps) { |
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$row->[$_] = $colmaps[$_]->($row->[$_]) if $colmaps[$_]; |
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} |
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print $tfh join("\t", @$row), "\n"; |
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} |
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} |
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$tfh->flush; |
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168
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my $tree = TTree->new(defined($treename) ? ($treename, $treetitle) : ()); |
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$tree->ReadFile($tfh->filename, $root_header); |
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return $tree; |
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} |
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173
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sub _find_root_type { |
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my $self = shift; |
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my $sqltype = shift; |
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lc($sqltype) =~ /^([a-z0-9_]+)/ |
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or die "Unrecognized type: $sqltype"; |
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my $clean = $1; |
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my $mapped = $Typemap{$clean}; |
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die "Cannot find ROOT type for SQL type '$sqltype' (canon: $clean)" |
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if not defined $mapped; |
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return $Types{$mapped}; |
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} |
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185
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186
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sub sql2tree { |
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my $dbh = shift; |
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my $sql = shift; |
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my $binds = shift||[]; |
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my $attrs = shift||{}; |
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my %opt; |
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if (not blessed($dbh)) { |
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if (ref($dbh)) { |
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$dbh = DBI->connect(@$dbh); |
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} else { |
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$dbh = DBI->connect($dbh, "", ""); |
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} |
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} |
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200
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my $obj = SOOT::SQL2Tree->new( |
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%opt, |
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dbh => $dbh, |
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); |
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return $obj->make_tree($sql, $binds, $attrs); |
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} |
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1; |
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__END__ |