annotate Lib/Schema/DB/Traits.pm @ 84:e568c7c8b743

Minor changes to the test infrastructure
author wizard
date Wed, 14 Apr 2010 17:38:11 +0400
parents 16ada169ca75
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 package Schema::DB::Traits;
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2 use strict;
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3 use Common;
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4 our @ISA = qw (Object);
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5
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6 use constant {
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7 STATE_NORMAL => 0,
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8 STATE_UPDATED => 1,
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9 STATE_CREATED => 2,
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10 STATE_REMOVED => 3,
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11 STATE_PENDING => 4
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12 } ;
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13
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14 BEGIN {
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15 DeclareProperty SrcSchema => ACCESS_NONE;
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16 DeclareProperty DstSchema => ACCESS_NONE;
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17 DeclareProperty PendingActions => ACCESS_READ;
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18 DeclareProperty TableInfo => ACCESS_READ;
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19 DeclareProperty Handler => ACCESS_READ;
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20 DeclareProperty TableMap => ACCESS_NONE;
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21 DeclareProperty KeepTables => ACCESS_ALL;
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22 }
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23
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24 sub CTOR {
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25 my $this = shift;
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26 $this->SUPER::CTOR(@_);
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27
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28 $this->{$SrcSchema} or die new Exception('A source schema is required');
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29 $this->{$DstSchema} or die new Exception('A destination schema is required');
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30 $this->{$Handler} or die new Exception('A handler is required to produce the update batch');
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31
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32 $this->{$TableInfo} = {};
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33 $this->{$PendingActions} = [];
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34
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35 }
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36
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37 sub UpdateTable {
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38 my ($this,$srcTable) = @_;
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39
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40 return 1 if $this->{$TableInfo}->{$srcTable->Name}->{'processed'};
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41
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42 my $dstTableName = $this->{$TableMap}->{$srcTable->Name} ? $this->{$TableMap}->{$srcTable->Name} : $srcTable->Name;
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43 my $dstTable = $this->{$DstSchema}->Tables->{$dstTableName};
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44
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45 $this->{$TableInfo}->{$srcTable->Name}->{'processed'} = 1;
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46
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47 if (not $dstTable) {
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48 $this->DropTable($srcTable) if not $this->{$KeepTables};
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49 return 1;
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50 }
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51
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52 if ( not grep {$srcTable->Column($_->Name)} $dstTable->Columns ) {
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53
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54 $this->{$TableInfo}->{$srcTable->Name}->{'NewName'} = $dstTable->Name if $srcTable->Name ne $dstTable->Name;
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55
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56 $this->DropTable($srcTable);
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57 $this->CreateTable($dstTable);
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58
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59 return 1;
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60 }
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61
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62 if ($srcTable->Name ne $dstTableName) {
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63 $this->RenameTable($srcTable,$dstTableName);
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64 }
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65
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66 my %dstConstraints = %{$dstTable->Constraints};
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67
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68 foreach my $srcConstraint (values %{$srcTable->Constraints}) {
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69 if (my $dstConstraint = delete $dstConstraints{$srcConstraint->Name}) {
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70 $this->UpdateConstraint($srcConstraint,$dstConstraint);
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71 } else {
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72 $this->DropConstraint($srcConstraint);
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73 }
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74 }
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75
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76 my $i = 0;
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77 my %dstColumns = map { $_->Name, $i++} $dstTable->Columns ;
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78
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79 # сначала удаляем столбцы
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80 # потом добавляем недостающие и изменяем столбцы в нужном порядке
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81
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82 my @columnsToUpdate;
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83
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84 foreach my $srcColumn ($srcTable->Columns) {
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85 if (defined (my $dstColumnIndex = delete $dstColumns{$srcColumn->Name})) {
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86 push @columnsToUpdate, { Action => 'update', ColumnSrc => $srcColumn, ColumnDst => $dstTable->ColumnAt($dstColumnIndex), NewPosition => $dstColumnIndex};
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87 } else {
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88 $this->DropColumn($srcTable,$srcColumn);
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89 }
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90 }
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91 push @columnsToUpdate, map { {Action => 'add', ColumnDst => $dstTable->ColumnAt($_), NewPosition => $_} } values %dstColumns;
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92
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93 foreach my $action (sort {$a->{'NewPosition'} <=> $b->{'NewPosition'}} @columnsToUpdate ) {
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94 if ($action->{'Action'} eq 'update') {
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95 $this->UpdateColumn($srcTable,@$action{'ColumnSrc','ColumnDst'},$dstTable,$action->{'NewPosition'}); # change type and position
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96 }elsif ($action->{'Action'} eq 'add') {
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97 $this->AddColumn($srcTable,$action->{'ColumnDst'},$dstTable,$action->{'NewPosition'}); # add at specified position
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98 }
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99 }
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100
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101 foreach my $dstConstraint (values %dstConstraints) {
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102 $this->AddConstraint($dstConstraint);
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103 }
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104
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105 $this->{$TableInfo}{$srcTable->Name}{'State'} = STATE_UPDATED;
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106 }
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107
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108 sub UpdateConstraint {
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109 my ($this,$src,$dst) = @_;
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110
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111 if (not ConstraintEquals($src,$dst)) {
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112 if (UNIVERSAL::isa($src,'Schema::DB::Constraint::PrimaryKey')) {
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113 $this->UpdateTable($_->Table) foreach values %{$src->ConnectedFK};
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114 }
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115 $this->DropConstraint($src);
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116 $this->AddConstraint($dst);
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117 } else {
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118 $this->{$TableInfo}->{$this->MapTableName($src->Table->Name)}->{'Constraints'}->{$src->Name} = STATE_UPDATED;
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119 }
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120 }
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121
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122 sub ConstraintEquals {
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123 my ($src,$dst) = @_;
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124
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125 ref $src eq ref $dst or return 0;
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126
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127 my @dstColumns = $dst->Columns;
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128 scalar(@{$src->Columns}) == scalar(@{$dst->Columns}) and not grep { my $column = shift @dstColumns; not $column->isSame($_) } $src->Columns or return 0;
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129
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130 not UNIVERSAL::isa($src,'Schema::DB::Constraint::ForeignKey') or ConstraintEquals($src->ReferencedPrimaryKey,$dst->ReferencedPrimaryKey) or return 0;
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131
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132 1;
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133 }
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134
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135 sub UpdateSchema {
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136 my ($this) = @_;
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137
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138 my %Updated = map { $this->UpdateTable($_); $this->MapTableName($_->Name) , 1; } values %{$this->{$SrcSchema}->Tables ? $this->{$SrcSchema}->Tables : {} };
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139
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140 $this->CreateTable($_) foreach grep {not $Updated{$_->Name}} values %{$this->{$DstSchema}->Tables};
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141
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142 $this->ProcessPendingActions();
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143 }
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144
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145 sub RenameTable {
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146 my ($this,$tblSrc,$tblDstName) = @_;
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147
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148 $this->{$Handler}->AlterTableRename($tblSrc->Name,$tblDstName);
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149 $this->{$TableInfo}->{$tblSrc->Name}->{'NewName'} = $tblDstName;
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150 }
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151
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152 sub MapTableName {
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153 my ($this,$srcName) = @_;
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154
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155 $this->{$TableInfo}->{$srcName}->{'NewName'} ? $this->{$TableInfo}->{$srcName}->{'NewName'} : $srcName;
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156 }
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157
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158 sub DropTable {
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159 my ($this,$tbl) = @_;
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160
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161 if ($tbl->PrimaryKey) {
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162 $this->UpdateTable($_->Table) foreach values %{$tbl->PrimaryKey->ConnectedFK};
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163 }
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164
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165 $this->{$Handler}->DropTable($this->MapTableName($tbl->Name));
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166 $this->{$TableInfo}{$this->MapTableName($tbl->Name)}{'State'} = STATE_REMOVED;
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167 $this->{$TableInfo}{$this->MapTableName($tbl->Name)}{'Constraints'} = {map {$_,STATE_REMOVED} keys %{$tbl->Constraints}};
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168 $this->{$TableInfo}{$this->MapTableName($tbl->Name)}{'Columns'} = {map { $_->Name, STATE_REMOVED} $tbl->Columns};
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169
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170 return 1;
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171 }
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172
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173 sub CreateTable {
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174 my ($this,$tbl) = @_;
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175
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176 # создаем таблицу, кроме внешних ключей
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177 $this->{$Handler}->CreateTable($tbl,skip_foreign_keys => 1);
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178
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179 $this->{$TableInfo}->{$tbl->Name}->{'State'} = STATE_CREATED;
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180
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181 $this->{$TableInfo}->{$tbl->Name}->{'Columns'} = {map { $_->Name, STATE_CREATED } $tbl->Columns};
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182 $this->{$TableInfo}->{$tbl->Name}->{'Constraints'} = {map {$_->Name, STATE_CREATED} grep { not UNIVERSAL::isa($_,'Schema::DB::Constraint::ForeignKey') } values %{$tbl->Constraints}};
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183
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184 $this->AddConstraint($_) foreach grep { UNIVERSAL::isa($_,'Schema::DB::Constraint::ForeignKey') } values %{$tbl->Constraints};
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185
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186 return 1;
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187 }
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188
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189 sub AddColumn {
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190 my ($this,$tblSrc,$column,$tblDst,$pos) = @_;
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191
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192 $this->{$Handler}->AlterTableAddColumn($this->MapTableName($tblSrc->Name),$column,$tblDst,$pos);
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193 $this->{$TableInfo}->{$this->MapTableName($tblSrc->Name)}->{'Columns'}->{$column->Name} = STATE_CREATED;
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194
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195 return 1;
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196 }
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197
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198 sub DropColumn {
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199 my ($this,$tblSrc,$column) = @_;
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200 $this->{$Handler}->AlterTableDropColumn($this->MapTableName($tblSrc->Name),$column->Name);
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201 $this->{$TableInfo}->{$this->MapTableName($tblSrc->Name)}->{'Columns'}->{$column->Name} = STATE_REMOVED;
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202
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203 return 1;
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204 }
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205
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206 sub UpdateColumn {
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207 my ($this,$tblSrc,$srcColumn,$dstColumn,$tblDst,$pos) = @_;
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208
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209 if ($srcColumn->isSame($dstColumn) and $pos < @{$tblSrc->Columns} and $tblSrc->ColumnAt($pos) == $srcColumn) {
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210 $this->{$TableInfo}->{$this->MapTableName($tblSrc->Name)}->{'Columns'}->{$dstColumn->Name} = STATE_UPDATED;
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211 return 1;
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212 }
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213
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214 $this->{$Handler}->AlterTableChangeColumn($this->MapTableName($tblSrc->Name),$dstColumn,$tblDst,$pos);
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215 $this->{$TableInfo}->{$this->MapTableName($tblSrc->Name)}->{'Columns'}->{$dstColumn->Name} = STATE_UPDATED;
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216
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217 return 1;
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218 }
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219
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220 sub DropConstraint {
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221 my ($this,$constraint) = @_;
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222
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223 $this->{$Handler}->AlterTableDropConstraint($this->MapTableName($constraint->Table->Name),$constraint);
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224 $this->{$TableInfo}->{$constraint->Table->Name}->{'Constraints'}->{$constraint->Name} = STATE_REMOVED;
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225
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226 return 1;
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227 }
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228
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229 sub IfUndef {
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230 my ($value,$default) = @_;
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231
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232 return defined $value ? $value : $default;
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233 }
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234
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235 sub AddConstraint {
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236 my ($this,$constraint) = @_;
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237
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238 # перед добавлением ограничения нужно убедиться в том, что созданы все необходимые столбцы и сопутствующие
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239 # ограничения (например первичные ключи)
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240
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241 my $pending;
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242
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243 $pending = grep { my $column = $_; not grep { IfUndef($this->{$TableInfo}{$constraint->Table->Name}{'Columns'}{$column->Name}, STATE_NORMAL) == $_ } (STATE_UPDATED, STATE_CREATED) } $constraint->Columns;
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244
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245 if ($pending) {
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246 push @{$this->{$PendingActions}},{Action => \&AddConstraint, Args => [$constraint]};
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247 return 2;
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248 } else {
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249 if (UNIVERSAL::isa($constraint,'Schema::DB::Constraint::ForeignKey')) {
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250 if (not grep { IfUndef($this->{$TableInfo}{$constraint->ReferencedPrimaryKey->Table->Name}{'Constraints'}{$constraint->ReferencedPrimaryKey->Name},STATE_NORMAL) == $_} (STATE_UPDATED, STATE_CREATED)) {
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251 push @{$this->{$PendingActions}},{Action => \&AddConstraint, Args => [$constraint]};
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252 return 2;
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253 }
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254 }
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255 $this->{$Handler}->AlterTableAddConstraint($constraint->Table->Name,$constraint);
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256 $this->{$TableInfo}->{$constraint->Table->Name}->{'Constraints'}->{$constraint->Name} = STATE_CREATED;
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257 }
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258 }
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259
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260 sub ProcessPendingActions {
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261 my ($this) = @_;
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262
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263 while (my $action = shift @{$this->{$PendingActions}}) {
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264 $action->{'Action'}->($this,@{$action->{'Args'}});
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265 }
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266 }
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267
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268 1;