annotate Lib/IMPL/SQL/Schema/TraitsOld.pm @ 215:77a9934a44af

sync, migrating to XML::Compile
author cin
date Sun, 19 Aug 2012 22:27:43 +0400
parents d1676be8afcc
children
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1 package IMPL::SQL::Schema::Traits;
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2 use strict;
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3 use parent qw(IMPL::Object IMPL::Object::Autofill);
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4 use IMPL::Class::Property;
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5 use IMPL::Class::Property::Direct;
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6
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7 use constant {
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8 STATE_NORMAL => 0,
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9 STATE_UPDATED => 1,
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10 STATE_CREATED => 2,
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11 STATE_REMOVED => 3,
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12 STATE_PENDING => 4
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13 } ;
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14
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15 BEGIN {
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16 public _direct property SrcSchema => prop_all;
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17 public _direct property DstSchema => prop_all;
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18 public _direct property PendingActions => prop_get;
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19 public _direct property TableInfo => prop_get;
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20 public _direct property Handler => prop_get;
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21 public _direct property TableMap => prop_none;
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22 public _direct property KeepTables => prop_all;
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23 }
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24
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25 __PACKAGE__->PassThroughArgs;
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26
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27 sub CTOR {
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28 my $this = shift;
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29
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30 $this->{$SrcSchema} or die new IMPL::InvalidArgumentException('A source schema is required');
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31 $this->{$DstSchema} or die new IMPL::InvalidArgumentException('A destination schema is required');
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32 $this->{$Handler} or die new IMPL::InvalidArgumentException('A handler is required to produce the update batch');
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33
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34 $this->{$TableInfo} = {};
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35 $this->{$PendingActions} = [];
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36
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37 }
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38
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39 sub UpdateTable {
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40 my ($this,$srcTable) = @_;
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41
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42 return 1 if $this->{$TableInfo}->{$srcTable->Name}->{'processed'};
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43
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44 my $dstTableName = $this->{$TableMap}->{$srcTable->Name} ? $this->{$TableMap}->{$srcTable->Name} : $srcTable->Name;
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45 my $dstTable = $this->{$DstSchema}->Tables->{$dstTableName};
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46
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47 $this->{$TableInfo}->{$srcTable->Name}->{'processed'} = 1;
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48
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49 if (not $dstTable) {
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50 $this->DropTable($srcTable) if not $this->{$KeepTables};
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51 return 1;
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52 }
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53
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54 if ( not grep {$srcTable->Column($_->Name)} @{$dstTable->Columns} ) {
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55
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56 $this->{$TableInfo}->{$srcTable->Name}->{'NewName'} = $dstTable->Name if $srcTable->Name ne $dstTable->Name;
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57
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58 $this->DropTable($srcTable);
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59 $this->CreateTable($dstTable);
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60
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61 return 1;
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62 }
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63
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64 if ($srcTable->Name ne $dstTableName) {
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65 $this->RenameTable($srcTable,$dstTableName);
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66 }
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67
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68 my %dstConstraints = %{$dstTable->Constraints};
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69
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70 foreach my $srcConstraint (values %{$srcTable->Constraints}) {
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71 if (my $dstConstraint = delete $dstConstraints{$srcConstraint->Name}) {
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72 $this->UpdateConstraint($srcConstraint,$dstConstraint);
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73 } else {
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74 $this->DropConstraint($srcConstraint);
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75 }
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76 }
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77
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78 my $i = 0;
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79 my %dstColumns = map { $_->Name, $i++} @{$dstTable->Columns} ;
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80
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81 # сначала удаляем столбцы
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82 # потом добавляем недостающие и изменяем столбцы в нужном порядке
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83
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84 my @columnsToUpdate;
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85
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86 foreach my $srcColumn (@{$srcTable->Columns}) {
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87 if (defined (my $dstColumnIndex = delete $dstColumns{$srcColumn->Name})) {
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88 push @columnsToUpdate, { Action => 'update', ColumnSrc => $srcColumn, ColumnDst => $dstTable->ColumnAt($dstColumnIndex), NewPosition => $dstColumnIndex};
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89 } else {
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90 $this->DropColumn($srcTable,$srcColumn);
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91 }
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92 }
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93 push @columnsToUpdate, map { {Action => 'add', ColumnDst => $dstTable->ColumnAt($_), NewPosition => $_} } values %dstColumns;
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94
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95 foreach my $action (sort {$a->{'NewPosition'} <=> $b->{'NewPosition'}} @columnsToUpdate ) {
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96 if ($action->{'Action'} eq 'update') {
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97 $this->UpdateColumn($srcTable,@$action{'ColumnSrc','ColumnDst'},$dstTable,$action->{'NewPosition'}); # change type and position
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98 }elsif ($action->{'Action'} eq 'add') {
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99 $this->AddColumn($srcTable,$action->{'ColumnDst'},$dstTable,$action->{'NewPosition'}); # add at specified position
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100 }
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101 }
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102
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103 foreach my $dstConstraint (values %dstConstraints) {
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104 $this->AddConstraint($dstConstraint);
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105 }
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106
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107 $this->{$TableInfo}{$srcTable->Name}{'State'} = STATE_UPDATED;
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108 }
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109
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110 sub UpdateConstraint {
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111 my ($this,$src,$dst) = @_;
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112
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113 if (not ConstraintEquals($src,$dst)) {
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114 if (UNIVERSAL::isa($src,'IMPL::SQL::Schema::Constraint::PrimaryKey')) {
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115 $this->UpdateTable($_->Table) foreach values %{$src->ConnectedFK};
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116 }
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117 $this->DropConstraint($src);
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118 $this->AddConstraint($dst);
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119 } else {
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120 $this->{$TableInfo}->{$this->MapTableName($src->Table->Name)}->{'Constraints'}->{$src->Name} = STATE_UPDATED;
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121 }
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122 }
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123
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124 sub ConstraintEquals {
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125 my ($src,$dst) = @_;
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126
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127 ref $src eq ref $dst or return 0;
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128
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129 my @dstColumns = @{$dst->Columns};
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130 scalar(@{$src->Columns}) == scalar(@{$dst->Columns}) and not grep { my $column = shift @dstColumns; not $column->isSame($_) } @{$src->Columns} or return 0;
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131
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132 not UNIVERSAL::isa($src,'IMPL::SQL::Schema::Constraint::ForeignKey') or ConstraintEquals($src->ReferencedPrimaryKey,$dst->ReferencedPrimaryKey) or return 0;
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133
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134 1;
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135 }
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136
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137 sub UpdateSchema {
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138 my ($this) = @_;
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139
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140 my %Updated = map { $this->UpdateTable($_); $this->MapTableName($_->Name) , 1; } values %{$this->{$SrcSchema}->Tables ? $this->{$SrcSchema}->Tables : {} };
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141
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142 $this->CreateTable($_) foreach grep {not $Updated{$_->Name}} values %{$this->{$DstSchema}->Tables};
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143
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144 $this->ProcessPendingActions();
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145 }
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146
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147 sub RenameTable {
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148 my ($this,$tblSrc,$tblDstName) = @_;
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149
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150 $this->{$Handler}->AlterTableRename($tblSrc->Name,$tblDstName);
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151 $this->{$TableInfo}->{$tblSrc->Name}->{'NewName'} = $tblDstName;
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152 }
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153
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154 sub MapTableName {
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155 my ($this,$srcName) = @_;
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156
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157 $this->{$TableInfo}->{$srcName}->{'NewName'} ? $this->{$TableInfo}->{$srcName}->{'NewName'} : $srcName;
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158 }
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159
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160 sub DropTable {
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161 my ($this,$tbl) = @_;
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162
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163 if ($tbl->PrimaryKey) {
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164 $this->UpdateTable($_->Table) foreach values %{$tbl->PrimaryKey->ConnectedFK};
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165 }
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166
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167 $this->{$Handler}->DropTable($this->MapTableName($tbl->Name));
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168 $this->{$TableInfo}{$this->MapTableName($tbl->Name)}{'State'} = STATE_REMOVED;
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169 $this->{$TableInfo}{$this->MapTableName($tbl->Name)}{'Constraints'} = {map {$_,STATE_REMOVED} keys %{$tbl->Constraints}};
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170 $this->{$TableInfo}{$this->MapTableName($tbl->Name)}{'Columns'} = {map { $_->Name, STATE_REMOVED} @{$tbl->Columns}};
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171
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172 return 1;
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173 }
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174
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175 sub CreateTable {
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176 my ($this,$tbl) = @_;
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177
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178 # создаем таблицу, кроме внешних ключей
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179 $this->{$Handler}->CreateTable($tbl,skip_foreign_keys => 1);
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180
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181 $this->{$TableInfo}->{$tbl->Name}->{'State'} = STATE_CREATED;
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182
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183 $this->{$TableInfo}->{$tbl->Name}->{'Columns'} = {map { $_->Name, STATE_CREATED } @{$tbl->Columns}};
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184 $this->{$TableInfo}->{$tbl->Name}->{'Constraints'} = {map {$_->Name, STATE_CREATED} grep { not UNIVERSAL::isa($_,'IMPL::SQL::Schema::Constraint::ForeignKey') } values %{$tbl->Constraints}};
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185
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186 $this->AddConstraint($_) foreach grep { UNIVERSAL::isa($_,'IMPL::SQL::Schema::Constraint::ForeignKey') } values %{$tbl->Constraints};
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187
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188 return 1;
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189 }
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190
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191 sub AddColumn {
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192 my ($this,$tblSrc,$column,$tblDst,$pos) = @_;
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193
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194 $this->{$Handler}->AlterTableAddColumn($this->MapTableName($tblSrc->Name),$column,$tblDst,$pos);
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195 $this->{$TableInfo}->{$this->MapTableName($tblSrc->Name)}->{'Columns'}->{$column->Name} = STATE_CREATED;
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196
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197 return 1;
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198 }
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199
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200 sub DropColumn {
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201 my ($this,$tblSrc,$column) = @_;
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202 $this->{$Handler}->AlterTableDropColumn($this->MapTableName($tblSrc->Name),$column->Name);
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203 $this->{$TableInfo}->{$this->MapTableName($tblSrc->Name)}->{'Columns'}->{$column->Name} = STATE_REMOVED;
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204
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205 return 1;
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206 }
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207
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208 sub UpdateColumn {
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209 my ($this,$tblSrc,$srcColumn,$dstColumn,$tblDst,$pos) = @_;
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210
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211 if ($srcColumn->isSame($dstColumn) and $pos < @{$tblSrc->Columns} and $tblSrc->ColumnAt($pos) == $srcColumn) {
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212 $this->{$TableInfo}->{$this->MapTableName($tblSrc->Name)}->{'Columns'}->{$dstColumn->Name} = STATE_UPDATED;
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213 return 1;
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214 }
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215
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216 $this->{$Handler}->AlterTableChangeColumn($this->MapTableName($tblSrc->Name),$dstColumn,$tblDst,$pos);
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217 $this->{$TableInfo}->{$this->MapTableName($tblSrc->Name)}->{'Columns'}->{$dstColumn->Name} = STATE_UPDATED;
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218
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219 return 1;
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220 }
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221
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222 sub DropConstraint {
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223 my ($this,$constraint) = @_;
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224
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225 $this->{$Handler}->AlterTableDropConstraint($this->MapTableName($constraint->Table->Name),$constraint);
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226 $this->{$TableInfo}->{$constraint->Table->Name}->{'Constraints'}->{$constraint->Name} = STATE_REMOVED;
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227
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228 return 1;
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229 }
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230
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231 sub IfUndef {
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232 my ($value,$default) = @_;
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233
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234 return defined $value ? $value : $default;
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235 }
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236
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237 sub AddConstraint {
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238 my ($this,$constraint) = @_;
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239
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240 # перед добавлением ограничения нужно убедиться в том, что созданы все необходимые столбцы и сопутствующие
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241 # ограничения (например первичные ключи)
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242
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243 my $pending;
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244
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245 $pending = grep {
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246 my $column = $_;
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247 not grep {
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248 IfUndef($this->{$TableInfo}{$constraint->Table->Name}{'Columns'}{$column->Name}, STATE_NORMAL) == $_
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249 } (STATE_UPDATED, STATE_CREATED)
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250 } @{$constraint->Columns};
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251
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252 if ($pending) {
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253 push @{$this->{$PendingActions}},{Action => \&AddConstraint, Args => [$constraint]};
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254 return 2;
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255 } else {
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256 if (UNIVERSAL::isa($constraint,'IMPL::SQL::Schema::Constraint::ForeignKey')) {
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257 if (not grep { IfUndef($this->{$TableInfo}{$constraint->ReferencedPrimaryKey->Table->Name}{'Constraints'}{$constraint->ReferencedPrimaryKey->Name},STATE_NORMAL) == $_} (STATE_UPDATED, STATE_CREATED)) {
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258 push @{$this->{$PendingActions}},{Action => \&AddConstraint, Args => [$constraint]};
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259 return 2;
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260 }
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261 }
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262 $this->{$Handler}->AlterTableAddConstraint($constraint->Table->Name,$constraint);
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263 $this->{$TableInfo}->{$constraint->Table->Name}->{'Constraints'}->{$constraint->Name} = STATE_CREATED;
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264 }
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265 }
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266
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267 sub ProcessPendingActions {
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268 my ($this) = @_;
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269
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270 while (my $action = shift @{$this->{$PendingActions}}) {
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271 $action->{'Action'}->($this,@{$action->{'Args'}});
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272 }
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273 }
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274
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275 1;