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comparison Lib/IMPL/SQL/Schema/Traits.pm @ 32:56cef8e3cda6

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author Sergey
date Mon, 09 Nov 2009 01:39:31 +0300
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children 32d2350fccf9
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31:d59526f6310e 32:56cef8e3cda6
1 package IMPL::SQL::Schema::Traits;
2 use strict;
3 use base qw(IMPL::Object IMPL::Object::Autofill);
4 use IMPL::Class::Property;
5 use IMPL::Class::Property::Direct;
6
7 use constant {
8 STATE_NORMAL => 0,
9 STATE_UPDATED => 1,
10 STATE_CREATED => 2,
11 STATE_REMOVED => 3,
12 STATE_PENDING => 4
13 } ;
14
15 BEGIN {
16 public _direct property SrcSchema => prop_none;
17 public _direct property DstSchema => prop_none;
18 public _direct property PendingActions => prop_get;
19 public _direct property TableInfo => prop_get;
20 public _direct property Handler => prop_get;
21 public _direct property TableMap => prop_none;
22 public _direct property KeepTables => prop_all;
23 }
24
25 __PACKAGE__->PassThroughArgs;
26
27 sub CTOR {
28 my $this = shift;
29
30 $this->{$SrcSchema} or die new IMPL::InvalidArgumentException('A source schema is required');
31 $this->{$DstSchema} or die new IMPL::InvalidArgumentException('A destination schema is required');
32 $this->{$Handler} or die new IMPL::InvalidArgumentException('A handler is required to produce the update batch');
33
34 $this->{$TableInfo} = {};
35 $this->{$PendingActions} = [];
36
37 }
38
39 sub UpdateTable {
40 my ($this,$srcTable) = @_;
41
42 return 1 if $this->{$TableInfo}->{$srcTable->Name}->{'processed'};
43
44 my $dstTableName = $this->{$TableMap}->{$srcTable->Name} ? $this->{$TableMap}->{$srcTable->Name} : $srcTable->Name;
45 my $dstTable = $this->{$DstSchema}->Tables->{$dstTableName};
46
47 $this->{$TableInfo}->{$srcTable->Name}->{'processed'} = 1;
48
49 if (not $dstTable) {
50 $this->DropTable($srcTable) if not $this->{$KeepTables};
51 return 1;
52 }
53
54 if ( not grep {$srcTable->Column($_->Name)} $dstTable->Columns ) {
55
56 $this->{$TableInfo}->{$srcTable->Name}->{'NewName'} = $dstTable->Name if $srcTable->Name ne $dstTable->Name;
57
58 $this->DropTable($srcTable);
59 $this->CreateTable($dstTable);
60
61 return 1;
62 }
63
64 if ($srcTable->Name ne $dstTableName) {
65 $this->RenameTable($srcTable,$dstTableName);
66 }
67
68 my %dstConstraints = %{$dstTable->Constraints};
69
70 foreach my $srcConstraint (values %{$srcTable->Constraints}) {
71 if (my $dstConstraint = delete $dstConstraints{$srcConstraint->Name}) {
72 $this->UpdateConstraint($srcConstraint,$dstConstraint);
73 } else {
74 $this->DropConstraint($srcConstraint);
75 }
76 }
77
78 my $i = 0;
79 my %dstColumns = map { $_->Name, $i++} $dstTable->Columns ;
80
81 # сначала удаляем столбцы
82 # потом добавляем недостающие и изменяем столбцы в нужном порядке
83
84 my @columnsToUpdate;
85
86 foreach my $srcColumn ($srcTable->Columns) {
87 if (defined (my $dstColumnIndex = delete $dstColumns{$srcColumn->Name})) {
88 push @columnsToUpdate, { Action => 'update', ColumnSrc => $srcColumn, ColumnDst => $dstTable->ColumnAt($dstColumnIndex), NewPosition => $dstColumnIndex};
89 } else {
90 $this->DropColumn($srcTable,$srcColumn);
91 }
92 }
93 push @columnsToUpdate, map { {Action => 'add', ColumnDst => $dstTable->ColumnAt($_), NewPosition => $_} } values %dstColumns;
94
95 foreach my $action (sort {$a->{'NewPosition'} <=> $b->{'NewPosition'}} @columnsToUpdate ) {
96 if ($action->{'Action'} eq 'update') {
97 $this->UpdateColumn($srcTable,@$action{'ColumnSrc','ColumnDst'},$dstTable,$action->{'NewPosition'}); # change type and position
98 }elsif ($action->{'Action'} eq 'add') {
99 $this->AddColumn($srcTable,$action->{'ColumnDst'},$dstTable,$action->{'NewPosition'}); # add at specified position
100 }
101 }
102
103 foreach my $dstConstraint (values %dstConstraints) {
104 $this->AddConstraint($dstConstraint);
105 }
106
107 $this->{$TableInfo}{$srcTable->Name}{'State'} = STATE_UPDATED;
108 }
109
110 sub UpdateConstraint {
111 my ($this,$src,$dst) = @_;
112
113 if (not ConstraintEquals($src,$dst)) {
114 if (UNIVERSAL::isa($src,'IMPL::SQL::Schema::Constraint::PrimaryKey')) {
115 $this->UpdateTable($_->Table) foreach values %{$src->ConnectedFK};
116 }
117 $this->DropConstraint($src);
118 $this->AddConstraint($dst);
119 } else {
120 $this->{$TableInfo}->{$this->MapTableName($src->Table->Name)}->{'Constraints'}->{$src->Name} = STATE_UPDATED;
121 }
122 }
123
124 sub ConstraintEquals {
125 my ($src,$dst) = @_;
126
127 ref $src eq ref $dst or return 0;
128
129 my @dstColumns = $dst->Columns;
130 scalar(@{$src->Columns}) == scalar(@{$dst->Columns}) and not grep { my $column = shift @dstColumns; not $column->isSame($_) } $src->Columns or return 0;
131
132 not UNIVERSAL::isa($src,'IMPL::SQL::Schema::Constraint::ForeignKey') or ConstraintEquals($src->ReferencedPrimaryKey,$dst->ReferencedPrimaryKey) or return 0;
133
134 1;
135 }
136
137 sub UpdateSchema {
138 my ($this) = @_;
139
140 my %Updated = map { $this->UpdateTable($_); $this->MapTableName($_->Name) , 1; } values %{$this->{$SrcSchema}->Tables ? $this->{$SrcSchema}->Tables : {} };
141
142 $this->CreateTable($_) foreach grep {not $Updated{$_->Name}} values %{$this->{$DstSchema}->Tables};
143
144 $this->ProcessPendingActions();
145 }
146
147 sub RenameTable {
148 my ($this,$tblSrc,$tblDstName) = @_;
149
150 $this->{$Handler}->AlterTableRename($tblSrc->Name,$tblDstName);
151 $this->{$TableInfo}->{$tblSrc->Name}->{'NewName'} = $tblDstName;
152 }
153
154 sub MapTableName {
155 my ($this,$srcName) = @_;
156
157 $this->{$TableInfo}->{$srcName}->{'NewName'} ? $this->{$TableInfo}->{$srcName}->{'NewName'} : $srcName;
158 }
159
160 sub DropTable {
161 my ($this,$tbl) = @_;
162
163 if ($tbl->PrimaryKey) {
164 $this->UpdateTable($_->Table) foreach values %{$tbl->PrimaryKey->ConnectedFK};
165 }
166
167 $this->{$Handler}->DropTable($this->MapTableName($tbl->Name));
168 $this->{$TableInfo}{$this->MapTableName($tbl->Name)}{'State'} = STATE_REMOVED;
169 $this->{$TableInfo}{$this->MapTableName($tbl->Name)}{'Constraints'} = {map {$_,STATE_REMOVED} keys %{$tbl->Constraints}};
170 $this->{$TableInfo}{$this->MapTableName($tbl->Name)}{'Columns'} = {map { $_->Name, STATE_REMOVED} $tbl->Columns};
171
172 return 1;
173 }
174
175 sub CreateTable {
176 my ($this,$tbl) = @_;
177
178 # создаем таблицу, кроме внешних ключей
179 $this->{$Handler}->CreateTable($tbl,skip_foreign_keys => 1);
180
181 $this->{$TableInfo}->{$tbl->Name}->{'State'} = STATE_CREATED;
182
183 $this->{$TableInfo}->{$tbl->Name}->{'Columns'} = {map { $_->Name, STATE_CREATED } $tbl->Columns};
184 $this->{$TableInfo}->{$tbl->Name}->{'Constraints'} = {map {$_->Name, STATE_CREATED} grep { not UNIVERSAL::isa($_,'IMPL::SQL::Schema::Constraint::ForeignKey') } values %{$tbl->Constraints}};
185
186 $this->AddConstraint($_) foreach grep { UNIVERSAL::isa($_,'IMPL::SQL::Schema::Constraint::ForeignKey') } values %{$tbl->Constraints};
187
188 return 1;
189 }
190
191 sub AddColumn {
192 my ($this,$tblSrc,$column,$tblDst,$pos) = @_;
193
194 $this->{$Handler}->AlterTableAddColumn($this->MapTableName($tblSrc->Name),$column,$tblDst,$pos);
195 $this->{$TableInfo}->{$this->MapTableName($tblSrc->Name)}->{'Columns'}->{$column->Name} = STATE_CREATED;
196
197 return 1;
198 }
199
200 sub DropColumn {
201 my ($this,$tblSrc,$column) = @_;
202 $this->{$Handler}->AlterTableDropColumn($this->MapTableName($tblSrc->Name),$column->Name);
203 $this->{$TableInfo}->{$this->MapTableName($tblSrc->Name)}->{'Columns'}->{$column->Name} = STATE_REMOVED;
204
205 return 1;
206 }
207
208 sub UpdateColumn {
209 my ($this,$tblSrc,$srcColumn,$dstColumn,$tblDst,$pos) = @_;
210
211 if ($srcColumn->isSame($dstColumn) and $pos < @{$tblSrc->Columns} and $tblSrc->ColumnAt($pos) == $srcColumn) {
212 $this->{$TableInfo}->{$this->MapTableName($tblSrc->Name)}->{'Columns'}->{$dstColumn->Name} = STATE_UPDATED;
213 return 1;
214 }
215
216 $this->{$Handler}->AlterTableChangeColumn($this->MapTableName($tblSrc->Name),$dstColumn,$tblDst,$pos);
217 $this->{$TableInfo}->{$this->MapTableName($tblSrc->Name)}->{'Columns'}->{$dstColumn->Name} = STATE_UPDATED;
218
219 return 1;
220 }
221
222 sub DropConstraint {
223 my ($this,$constraint) = @_;
224
225 $this->{$Handler}->AlterTableDropConstraint($this->MapTableName($constraint->Table->Name),$constraint);
226 $this->{$TableInfo}->{$constraint->Table->Name}->{'Constraints'}->{$constraint->Name} = STATE_REMOVED;
227
228 return 1;
229 }
230
231 sub IfUndef {
232 my ($value,$default) = @_;
233
234 return defined $value ? $value : $default;
235 }
236
237 sub AddConstraint {
238 my ($this,$constraint) = @_;
239
240 # перед добавлением ограничения нужно убедиться в том, что созданы все необходимые столбцы и сопутствующие
241 # ограничения (например первичные ключи)
242
243 my $pending;
244
245 $pending = grep { my $column = $_; not grep { IfUndef($this->{$TableInfo}{$constraint->Table->Name}{'Columns'}{$column->Name}, STATE_NORMAL) == $_ } (STATE_UPDATED, STATE_CREATED) } $constraint->Columns;
246
247 if ($pending) {
248 push @{$this->{$PendingActions}},{Action => \&AddConstraint, Args => [$constraint]};
249 return 2;
250 } else {
251 if (UNIVERSAL::isa($constraint,'IMPL::SQL::Schema::Constraint::ForeignKey')) {
252 if (not grep { IfUndef($this->{$TableInfo}{$constraint->ReferencedPrimaryKey->Table->Name}{'Constraints'}{$constraint->ReferencedPrimaryKey->Name},STATE_NORMAL) == $_} (STATE_UPDATED, STATE_CREATED)) {
253 push @{$this->{$PendingActions}},{Action => \&AddConstraint, Args => [$constraint]};
254 return 2;
255 }
256 }
257 $this->{$Handler}->AlterTableAddConstraint($constraint->Table->Name,$constraint);
258 $this->{$TableInfo}->{$constraint->Table->Name}->{'Constraints'}->{$constraint->Name} = STATE_CREATED;
259 }
260 }
261
262 sub ProcessPendingActions {
263 my ($this) = @_;
264
265 while (my $action = shift @{$this->{$PendingActions}}) {
266 $action->{'Action'}->($this,@{$action->{'Args'}});
267 }
268 }
269
270 1;