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package DBIx::UpdateTable::FromHoH; |
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our $AUTHORITY = 'cpan:PERLANCAR'; # AUTHORITY |
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our $DATE = '2020-05-06'; # DATE |
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our $DIST = 'DBIx-UpdateTable-FromHoH'; # DIST |
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our $VERSION = '0.002'; # VERSION |
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89301
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use 5.010001; |
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use strict 'subs', 'vars'; |
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use warnings; |
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use Log::ger; |
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use Exporter; |
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our @ISA = qw(Exporter); |
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our @EXPORT_OK = qw( |
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update_table_from_hoh |
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); |
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our %SPEC; |
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sub _eq { |
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my ($v1, $v2) = @_; |
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my $v1_def = defined $v1; |
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my $v2_def = defined $v2; |
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0
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return 1 if !$v1_def && !$v2_def; |
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return 0 if $v1_def xor $v2_def; |
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$v1 eq $v2; |
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} |
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$SPEC{update_table_from_hoh} = { |
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v => 1.1, |
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summary => 'Update database table from hash-of-hash', |
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description => <<'_', |
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Given a table `t1` like this: |
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id col1 col2 col3 |
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-- ---- ---- ---- |
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1 a b foo |
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2 c c bar |
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3 g h qux |
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this code: |
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my $res = update_table_from_hoh( |
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dbh => $dbh, |
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table => 't1', |
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key_column => 'id', |
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hoh => { |
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1 => {col1=>'a', col2=>'b'}, |
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2 => {col1=>'c', col2=>'d'}, |
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4 => {col1=>'e', col2=>'f'}, |
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}, |
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); |
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will perform these SQL queries: |
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UPDATE TABLE t1 SET col2='d' WHERE id='2'; |
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INSERT INTO t1 (id,col1,col2) VALUES (4,'e','f'); |
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DELETE FROM t1 WHERE id='3'; |
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to make table `t1` become like this: |
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id col1 col2 col3 |
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-- ---- ---- ---- |
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1 a b foo |
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2 c d bar |
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4 e f qux |
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_ |
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args => { |
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dbh => { |
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schema => ['obj*'], |
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req => 1, |
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}, |
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table => { |
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schema => 'str*', |
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req => 1, |
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}, |
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hoh => { |
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schema => 'hoh*', |
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req => 1, |
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}, |
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key_column => { |
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schema => 'str*', |
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req => 1, |
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}, |
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data_columns => { |
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schema => ['array*', of=>'str*'], |
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}, |
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use_tx => { |
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schema => 'bool*', |
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default => 1, |
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}, |
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extra_insert_columns => { |
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schema => ['hos*'], # XXX or code |
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}, |
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extra_update_columns => { |
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schema => ['hos*'], # XXX or code |
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}, |
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}, |
102
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}; |
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sub update_table_from_hoh { |
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2
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1
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98662
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my %args = @_; |
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106
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2
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my $dbh = $args{dbh}; |
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my $table = $args{table}; |
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my $hoh = $args{hoh}; |
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my $key_column = $args{key_column}; |
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my $data_columns = $args{data_columns}; |
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my $use_tx = $args{use_tx} // 1; |
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113
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unless ($data_columns) { |
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5
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my %columns; |
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for my $key (keys %$hoh) { |
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my $row = $hoh->{$key}; |
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6
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26
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$columns{ $_ }++ for keys %$row; |
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} |
119
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2
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31
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$data_columns = [sort keys %columns]; |
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} |
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122
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my @columns = @$data_columns; |
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50
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push @columns, $key_column unless grep { $_ eq $key_column } @columns; |
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my $columns_str = join(",", @columns); |
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126
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2
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$dbh->begin_work if $use_tx; |
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128
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2
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50
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my $hoh_table = {}; |
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GET_ROWS: { |
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2
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my $sth = $dbh->prepare("SELECT $columns_str FROM $table"); |
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17
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131
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2
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330
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$sth->execute; |
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2
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145
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while (my $row = $sth->fetchrow_hashref) { |
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6
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116
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$hoh_table->{ $row->{$key_column} } = $row; |
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} |
135
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} |
136
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2
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my $num_rows_unchanged = keys %$hoh_table; |
137
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138
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2
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6
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my $num_rows_deleted = 0; |
139
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DELETE: { |
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2
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4
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for my $key (sort keys %$hoh_table) { |
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13
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141
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6
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100
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18
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unless (exists $hoh->{$key}) { |
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1
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10
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$dbh->do("DELETE FROM $table WHERE $key_column=?", {}, $key); |
143
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1
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309
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$num_rows_deleted++; |
144
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1
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4
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$num_rows_unchanged--; |
145
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} |
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} |
147
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} |
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149
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2
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6
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my $num_rows_updated = 0; |
150
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UPDATE: { |
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2
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4
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for my $key (sort keys %$hoh) { |
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9
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152
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6
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100
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22
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next unless exists $hoh_table->{$key}; |
153
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5
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10
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my @update_columns; |
154
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my @values; |
155
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5
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12
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for my $column (@columns) { |
156
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15
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100
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40
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next if $column eq $key_column; |
157
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10
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100
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27
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unless (_eq($hoh_table->{$key}{$column}, $hoh->{$key}{$column})) { |
158
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1
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3
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push @update_columns, $column; |
159
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1
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3
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push @values, $hoh->{$key}{$column}; |
160
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} |
161
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} |
162
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5
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100
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17
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next unless @update_columns; |
163
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164
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1
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50
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2
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for my $column (keys %{ $args{extra_update_columns} // {}}) { |
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6
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165
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1
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4
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next if grep { $column eq $_ } @columns; |
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9
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166
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1
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3
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push @update_columns, $column; |
167
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1
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3
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push @values, $args{extra_update_columns}{$column}; |
168
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} |
169
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170
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$dbh->do("UPDATE $table SET ". |
171
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1
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6
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join(",", map {"$_=?"} @update_columns). |
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16
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172
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" WHERE $key_column=?", |
173
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{}, |
174
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@values, $key); |
175
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1
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131
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$num_rows_updated++; |
176
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1
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3
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$num_rows_unchanged--; |
177
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} |
178
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} |
179
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180
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2
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11
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my $num_rows_inserted = 0; |
181
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INSERT: { |
182
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2
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5
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my @insert_columns = @columns; |
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2
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6
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183
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2
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100
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5
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my @extra_insert_columns = keys %{ $args{extra_insert_columns} // {} }; |
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2
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14
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184
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2
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50
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6
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for my $column (@extra_insert_columns) { push @insert_columns, $column unless grep { $_ eq $column } @insert_columns } |
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1
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3
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3
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185
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186
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2
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9
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my $insert_columns_str = join(",", @insert_columns); |
187
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2
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5
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my $placeholders_str = join(",", map {"?"} @insert_columns); |
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7
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26
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188
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2
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10
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for my $key (sort keys %$hoh) { |
189
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6
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100
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18
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unless (exists $hoh_table->{$key}) { |
190
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1
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2
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my @values; |
191
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1
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2
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for my $column (@insert_columns) { |
192
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4
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100
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11
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if ($column eq $key_column) { |
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100
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193
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1
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2
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push @values, $key; |
194
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3
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10
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} elsif (grep { $column eq $_ } @extra_insert_columns) { |
195
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1
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4
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push @values, $args{extra_insert_columns}{$column}; |
196
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} else { |
197
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2
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6
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push @values, $hoh->{$key}{$column}; |
198
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} |
199
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} |
200
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1
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11
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$dbh->do("INSERT INTO $table ($insert_columns_str) VALUES ($placeholders_str)", {}, @values); |
201
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1
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185
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$num_rows_inserted++; |
202
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} |
203
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} |
204
|
|
|
|
|
|
|
} |
205
|
|
|
|
|
|
|
|
206
|
2
|
50
|
|
|
|
13540
|
$dbh->commit if $use_tx; |
207
|
|
|
|
|
|
|
|
208
|
2
|
100
|
66
|
|
|
75
|
[$num_rows_deleted || $num_rows_inserted || $num_rows_updated ? 200 : 304, |
209
|
|
|
|
|
|
|
"OK", |
210
|
|
|
|
|
|
|
{ |
211
|
|
|
|
|
|
|
num_rows_deleted => $num_rows_deleted, |
212
|
|
|
|
|
|
|
num_rows_inserted => $num_rows_inserted, |
213
|
|
|
|
|
|
|
num_rows_updated => $num_rows_updated, |
214
|
|
|
|
|
|
|
num_rows_unchanged => $num_rows_unchanged, |
215
|
|
|
|
|
|
|
}]; |
216
|
|
|
|
|
|
|
} |
217
|
|
|
|
|
|
|
|
218
|
|
|
|
|
|
|
1; |
219
|
|
|
|
|
|
|
# ABSTRACT: Update database table from hash-of-hash |
220
|
|
|
|
|
|
|
|
221
|
|
|
|
|
|
|
__END__ |