49
+ − 1 package Schema::DB::Traits;
+ − 2 use strict;
+ − 3 use Common;
+ − 4 our @ISA = qw (Object);
+ − 5
+ − 6 use constant {
+ − 7 STATE_NORMAL => 0,
+ − 8 STATE_UPDATED => 1,
+ − 9 STATE_CREATED => 2,
+ − 10 STATE_REMOVED => 3,
+ − 11 STATE_PENDING => 4
+ − 12 } ;
+ − 13
+ − 14 BEGIN {
+ − 15 DeclareProperty SrcSchema => ACCESS_NONE;
+ − 16 DeclareProperty DstSchema => ACCESS_NONE;
+ − 17 DeclareProperty PendingActions => ACCESS_READ;
+ − 18 DeclareProperty TableInfo => ACCESS_READ;
+ − 19 DeclareProperty Handler => ACCESS_READ;
+ − 20 DeclareProperty TableMap => ACCESS_NONE;
+ − 21 DeclareProperty KeepTables => ACCESS_ALL;
+ − 22 }
+ − 23
+ − 24 sub CTOR {
+ − 25 my $this = shift;
+ − 26 $this->SUPER::CTOR(@_);
+ − 27
+ − 28 $this->{$SrcSchema} or die new Exception('A source schema is required');
+ − 29 $this->{$DstSchema} or die new Exception('A destination schema is required');
+ − 30 $this->{$Handler} or die new Exception('A handler is required to produce the update batch');
+ − 31
+ − 32 $this->{$TableInfo} = {};
+ − 33 $this->{$PendingActions} = [];
+ − 34
+ − 35 }
+ − 36
+ − 37 sub UpdateTable {
+ − 38 my ($this,$srcTable) = @_;
+ − 39
+ − 40 return 1 if $this->{$TableInfo}->{$srcTable->Name}->{'processed'};
+ − 41
+ − 42 my $dstTableName = $this->{$TableMap}->{$srcTable->Name} ? $this->{$TableMap}->{$srcTable->Name} : $srcTable->Name;
+ − 43 my $dstTable = $this->{$DstSchema}->Tables->{$dstTableName};
+ − 44
+ − 45 $this->{$TableInfo}->{$srcTable->Name}->{'processed'} = 1;
+ − 46
+ − 47 if (not $dstTable) {
+ − 48 $this->DropTable($srcTable) if not $this->{$KeepTables};
+ − 49 return 1;
+ − 50 }
+ − 51
+ − 52 if ( not grep {$srcTable->Column($_->Name)} $dstTable->Columns ) {
+ − 53
+ − 54 $this->{$TableInfo}->{$srcTable->Name}->{'NewName'} = $dstTable->Name if $srcTable->Name ne $dstTable->Name;
+ − 55
+ − 56 $this->DropTable($srcTable);
+ − 57 $this->CreateTable($dstTable);
+ − 58
+ − 59 return 1;
+ − 60 }
+ − 61
+ − 62 if ($srcTable->Name ne $dstTableName) {
+ − 63 $this->RenameTable($srcTable,$dstTableName);
+ − 64 }
+ − 65
+ − 66 my %dstConstraints = %{$dstTable->Constraints};
+ − 67
+ − 68 foreach my $srcConstraint (values %{$srcTable->Constraints}) {
+ − 69 if (my $dstConstraint = delete $dstConstraints{$srcConstraint->Name}) {
+ − 70 $this->UpdateConstraint($srcConstraint,$dstConstraint);
+ − 71 } else {
+ − 72 $this->DropConstraint($srcConstraint);
+ − 73 }
+ − 74 }
+ − 75
+ − 76 my $i = 0;
+ − 77 my %dstColumns = map { $_->Name, $i++} $dstTable->Columns ;
+ − 78
+ − 79 # ������� ������� �������
+ − 80 # ����� ��������� ����������� � �������� ������� � ������ �������
+ − 81
+ − 82 my @columnsToUpdate;
+ − 83
+ − 84 foreach my $srcColumn ($srcTable->Columns) {
+ − 85 if (defined (my $dstColumnIndex = delete $dstColumns{$srcColumn->Name})) {
+ − 86 push @columnsToUpdate, { Action => 'update', ColumnSrc => $srcColumn, ColumnDst => $dstTable->ColumnAt($dstColumnIndex), NewPosition => $dstColumnIndex};
+ − 87 } else {
+ − 88 $this->DropColumn($srcTable,$srcColumn);
+ − 89 }
+ − 90 }
+ − 91 push @columnsToUpdate, map { {Action => 'add', ColumnDst => $dstTable->ColumnAt($_), NewPosition => $_} } values %dstColumns;
+ − 92
+ − 93 foreach my $action (sort {$a->{'NewPosition'} <=> $b->{'NewPosition'}} @columnsToUpdate ) {
+ − 94 if ($action->{'Action'} eq 'update') {
+ − 95 $this->UpdateColumn($srcTable,@$action{'ColumnSrc','ColumnDst'},$dstTable,$action->{'NewPosition'}); # change type and position
+ − 96 }elsif ($action->{'Action'} eq 'add') {
+ − 97 $this->AddColumn($srcTable,$action->{'ColumnDst'},$dstTable,$action->{'NewPosition'}); # add at specified position
+ − 98 }
+ − 99 }
+ − 100
+ − 101 foreach my $dstConstraint (values %dstConstraints) {
+ − 102 $this->AddConstraint($dstConstraint);
+ − 103 }
+ − 104
+ − 105 $this->{$TableInfo}{$srcTable->Name}{'State'} = STATE_UPDATED;
+ − 106 }
+ − 107
+ − 108 sub UpdateConstraint {
+ − 109 my ($this,$src,$dst) = @_;
+ − 110
+ − 111 if (not ConstraintEquals($src,$dst)) {
+ − 112 if (UNIVERSAL::isa($src,'Schema::DB::Constraint::PrimaryKey')) {
+ − 113 $this->UpdateTable($_->Table) foreach values %{$src->ConnectedFK};
+ − 114 }
+ − 115 $this->DropConstraint($src);
+ − 116 $this->AddConstraint($dst);
+ − 117 } else {
+ − 118 $this->{$TableInfo}->{$this->MapTableName($src->Table->Name)}->{'Constraints'}->{$src->Name} = STATE_UPDATED;
+ − 119 }
+ − 120 }
+ − 121
+ − 122 sub ConstraintEquals {
+ − 123 my ($src,$dst) = @_;
+ − 124
+ − 125 ref $src eq ref $dst or return 0;
+ − 126
+ − 127 my @dstColumns = $dst->Columns;
+ − 128 scalar(@{$src->Columns}) == scalar(@{$dst->Columns}) and not grep { my $column = shift @dstColumns; not $column->isSame($_) } $src->Columns or return 0;
+ − 129
+ − 130 not UNIVERSAL::isa($src,'Schema::DB::Constraint::ForeignKey') or ConstraintEquals($src->ReferencedPrimaryKey,$dst->ReferencedPrimaryKey) or return 0;
+ − 131
+ − 132 1;
+ − 133 }
+ − 134
+ − 135 sub UpdateSchema {
+ − 136 my ($this) = @_;
+ − 137
+ − 138 my %Updated = map { $this->UpdateTable($_); $this->MapTableName($_->Name) , 1; } values %{$this->{$SrcSchema}->Tables ? $this->{$SrcSchema}->Tables : {} };
+ − 139
+ − 140 $this->CreateTable($_) foreach grep {not $Updated{$_->Name}} values %{$this->{$DstSchema}->Tables};
+ − 141
+ − 142 $this->ProcessPendingActions();
+ − 143 }
+ − 144
+ − 145 sub RenameTable {
+ − 146 my ($this,$tblSrc,$tblDstName) = @_;
+ − 147
+ − 148 $this->{$Handler}->AlterTableRename($tblSrc->Name,$tblDstName);
+ − 149 $this->{$TableInfo}->{$tblSrc->Name}->{'NewName'} = $tblDstName;
+ − 150 }
+ − 151
+ − 152 sub MapTableName {
+ − 153 my ($this,$srcName) = @_;
+ − 154
+ − 155 $this->{$TableInfo}->{$srcName}->{'NewName'} ? $this->{$TableInfo}->{$srcName}->{'NewName'} : $srcName;
+ − 156 }
+ − 157
+ − 158 sub DropTable {
+ − 159 my ($this,$tbl) = @_;
+ − 160
+ − 161 if ($tbl->PrimaryKey) {
+ − 162 $this->UpdateTable($_->Table) foreach values %{$tbl->PrimaryKey->ConnectedFK};
+ − 163 }
+ − 164
+ − 165 $this->{$Handler}->DropTable($this->MapTableName($tbl->Name));
+ − 166 $this->{$TableInfo}{$this->MapTableName($tbl->Name)}{'State'} = STATE_REMOVED;
+ − 167 $this->{$TableInfo}{$this->MapTableName($tbl->Name)}{'Constraints'} = {map {$_,STATE_REMOVED} keys %{$tbl->Constraints}};
+ − 168 $this->{$TableInfo}{$this->MapTableName($tbl->Name)}{'Columns'} = {map { $_->Name, STATE_REMOVED} $tbl->Columns};
+ − 169
+ − 170 return 1;
+ − 171 }
+ − 172
+ − 173 sub CreateTable {
+ − 174 my ($this,$tbl) = @_;
+ − 175
+ − 176 # ������� �������, ����� ������� ������
+ − 177 $this->{$Handler}->CreateTable($tbl,skip_foreign_keys => 1);
+ − 178
+ − 179 $this->{$TableInfo}->{$tbl->Name}->{'State'} = STATE_CREATED;
+ − 180
+ − 181 $this->{$TableInfo}->{$tbl->Name}->{'Columns'} = {map { $_->Name, STATE_CREATED } $tbl->Columns};
+ − 182 $this->{$TableInfo}->{$tbl->Name}->{'Constraints'} = {map {$_->Name, STATE_CREATED} grep { not UNIVERSAL::isa($_,'Schema::DB::Constraint::ForeignKey') } values %{$tbl->Constraints}};
+ − 183
+ − 184 $this->AddConstraint($_) foreach grep { UNIVERSAL::isa($_,'Schema::DB::Constraint::ForeignKey') } values %{$tbl->Constraints};
+ − 185
+ − 186 return 1;
+ − 187 }
+ − 188
+ − 189 sub AddColumn {
+ − 190 my ($this,$tblSrc,$column,$tblDst,$pos) = @_;
+ − 191
+ − 192 $this->{$Handler}->AlterTableAddColumn($this->MapTableName($tblSrc->Name),$column,$tblDst,$pos);
+ − 193 $this->{$TableInfo}->{$this->MapTableName($tblSrc->Name)}->{'Columns'}->{$column->Name} = STATE_CREATED;
+ − 194
+ − 195 return 1;
+ − 196 }
+ − 197
+ − 198 sub DropColumn {
+ − 199 my ($this,$tblSrc,$column) = @_;
+ − 200 $this->{$Handler}->AlterTableDropColumn($this->MapTableName($tblSrc->Name),$column->Name);
+ − 201 $this->{$TableInfo}->{$this->MapTableName($tblSrc->Name)}->{'Columns'}->{$column->Name} = STATE_REMOVED;
+ − 202
+ − 203 return 1;
+ − 204 }
+ − 205
+ − 206 sub UpdateColumn {
+ − 207 my ($this,$tblSrc,$srcColumn,$dstColumn,$tblDst,$pos) = @_;
+ − 208
+ − 209 if ($srcColumn->isSame($dstColumn) and $pos < @{$tblSrc->Columns} and $tblSrc->ColumnAt($pos) == $srcColumn) {
+ − 210 $this->{$TableInfo}->{$this->MapTableName($tblSrc->Name)}->{'Columns'}->{$dstColumn->Name} = STATE_UPDATED;
+ − 211 return 1;
+ − 212 }
+ − 213
+ − 214 $this->{$Handler}->AlterTableChangeColumn($this->MapTableName($tblSrc->Name),$dstColumn,$tblDst,$pos);
+ − 215 $this->{$TableInfo}->{$this->MapTableName($tblSrc->Name)}->{'Columns'}->{$dstColumn->Name} = STATE_UPDATED;
+ − 216
+ − 217 return 1;
+ − 218 }
+ − 219
+ − 220 sub DropConstraint {
+ − 221 my ($this,$constraint) = @_;
+ − 222
+ − 223 $this->{$Handler}->AlterTableDropConstraint($this->MapTableName($constraint->Table->Name),$constraint);
+ − 224 $this->{$TableInfo}->{$constraint->Table->Name}->{'Constraints'}->{$constraint->Name} = STATE_REMOVED;
+ − 225
+ − 226 return 1;
+ − 227 }
+ − 228
+ − 229 sub IfUndef {
+ − 230 my ($value,$default) = @_;
+ − 231
+ − 232 return defined $value ? $value : $default;
+ − 233 }
+ − 234
+ − 235 sub AddConstraint {
+ − 236 my ($this,$constraint) = @_;
+ − 237
+ − 238 # ����� ����������� ����������� ����� ��������� � ���, ��� ������� ��� ����������� ������� � �������������
+ − 239 # ����������� (�������� ��������� �����)
+ − 240
+ − 241 my $pending;
+ − 242
+ − 243 $pending = grep { my $column = $_; not grep { IfUndef($this->{$TableInfo}{$constraint->Table->Name}{'Columns'}{$column->Name}, STATE_NORMAL) == $_ } (STATE_UPDATED, STATE_CREATED) } $constraint->Columns;
+ − 244
+ − 245 if ($pending) {
+ − 246 push @{$this->{$PendingActions}},{Action => \&AddConstraint, Args => [$constraint]};
+ − 247 return 2;
+ − 248 } else {
+ − 249 if (UNIVERSAL::isa($constraint,'Schema::DB::Constraint::ForeignKey')) {
+ − 250 if (not grep { IfUndef($this->{$TableInfo}{$constraint->ReferencedPrimaryKey->Table->Name}{'Constraints'}{$constraint->ReferencedPrimaryKey->Name},STATE_NORMAL) == $_} (STATE_UPDATED, STATE_CREATED)) {
+ − 251 push @{$this->{$PendingActions}},{Action => \&AddConstraint, Args => [$constraint]};
+ − 252 return 2;
+ − 253 }
+ − 254 }
+ − 255 $this->{$Handler}->AlterTableAddConstraint($constraint->Table->Name,$constraint);
+ − 256 $this->{$TableInfo}->{$constraint->Table->Name}->{'Constraints'}->{$constraint->Name} = STATE_CREATED;
+ − 257 }
+ − 258 }
+ − 259
+ − 260 sub ProcessPendingActions {
+ − 261 my ($this) = @_;
+ − 262
+ − 263 while (my $action = shift @{$this->{$PendingActions}}) {
+ − 264 $action->{'Action'}->($this,@{$action->{'Args'}});
+ − 265 }
+ − 266 }
+ − 267
+ − 268 1;