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1 | package DBIx::Class::Storage::DBI::SQLAnywhere; |
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2 | |
3 | use strict; |
4 | use warnings; |
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5 | use base qw/DBIx::Class::Storage::DBI::UniqueIdentifier/; |
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6 | use mro 'c3'; |
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7 | use List::Util (); |
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8 | |
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9 | __PACKAGE__->mk_group_accessors(simple => qw/ |
10 | _identity |
11 | /); |
12 | |
13 | =head1 NAME |
14 | |
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15 | DBIx::Class::Storage::DBI::SQLAnywhere - Driver for Sybase SQL Anywhere |
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16 | |
17 | =head1 DESCRIPTION |
18 | |
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19 | This class implements autoincrements for Sybase SQL Anywhere, selects the |
20 | RowNumberOver limit implementation and provides |
21 | L<DBIx::Class::InflateColumn::DateTime> support. |
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22 | |
23 | You need the C<DBD::SQLAnywhere> driver that comes with the SQL Anywhere |
24 | distribution, B<NOT> the one on CPAN. It is usually under a path such as: |
25 | |
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26 | /opt/sqlanywhere11/sdk/perl |
27 | |
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28 | Recommended L<connect_info|DBIx::Class::Storage::DBI/connect_info> settings: |
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29 | |
30 | on_connect_call => 'datetime_setup' |
31 | |
32 | =head1 METHODS |
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33 | |
34 | =cut |
35 | |
36 | sub last_insert_id { shift->_identity } |
37 | |
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38 | sub _new_uuid { 'UUIDTOSTR(NEWID())' } |
39 | |
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40 | sub insert { |
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41 | my $self = shift; |
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42 | my ($source, $to_insert) = @_; |
43 | |
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44 | my $identity_col = List::Util::first { |
45 | $source->column_info($_)->{is_auto_increment} |
46 | } $source->columns; |
47 | |
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48 | # user might have an identity PK without is_auto_increment |
49 | if (not $identity_col) { |
50 | foreach my $pk_col ($source->primary_columns) { |
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51 | if (not exists $to_insert->{$pk_col} && |
52 | $source->column_info($pk_col)->{data_type} !~ /^uniqueidentifier/i) |
53 | { |
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54 | $identity_col = $pk_col; |
55 | last; |
56 | } |
57 | } |
58 | } |
59 | |
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60 | if ($identity_col && (not exists $to_insert->{$identity_col})) { |
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61 | my $dbh = $self->_get_dbh; |
62 | my $table_name = $source->from; |
63 | $table_name = $$table_name if ref $table_name; |
64 | |
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65 | my ($identity) = eval { |
66 | local $@; $dbh->selectrow_array("SELECT GET_IDENTITY('$table_name')") |
67 | }; |
68 | |
69 | if (defined $identity) { |
70 | $to_insert->{$identity_col} = $identity; |
71 | $self->_identity($identity); |
72 | } |
73 | } |
74 | |
75 | return $self->next::method(@_); |
76 | } |
77 | |
78 | # convert UUIDs to strings in selects |
79 | sub _select_args { |
80 | my $self = shift; |
81 | my ($ident, $select) = @_; |
82 | |
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83 | my $col_info = $self->_resolve_column_info($ident); |
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84 | |
85 | for my $select_idx (0..$#$select) { |
86 | my $selected = $select->[$select_idx]; |
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87 | |
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88 | next if ref $selected; |
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89 | |
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90 | my $data_type = $col_info->{$selected}{data_type}; |
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91 | |
92 | if ($data_type && $data_type =~ /^uniqueidentifier\z/i) { |
93 | $select->[$select_idx] = { UUIDTOSTR => $selected }; |
94 | } |
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95 | } |
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96 | |
97 | return $self->next::method(@_); |
98 | } |
99 | |
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100 | # this sub stolen from DB2 |
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101 | |
102 | sub _sql_maker_opts { |
103 | my ( $self, $opts ) = @_; |
104 | |
105 | if ( $opts ) { |
106 | $self->{_sql_maker_opts} = { %$opts }; |
107 | } |
108 | |
109 | return { limit_dialect => 'RowNumberOver', %{$self->{_sql_maker_opts}||{}} }; |
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110 | } |
111 | |
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112 | # this sub stolen from MSSQL |
113 | |
114 | sub build_datetime_parser { |
115 | my $self = shift; |
116 | my $type = "DateTime::Format::Strptime"; |
117 | eval "use ${type}"; |
118 | $self->throw_exception("Couldn't load ${type}: $@") if $@; |
119 | return $type->new( pattern => '%Y-%m-%d %H:%M:%S.%6N' ); |
120 | } |
121 | |
122 | =head2 connect_call_datetime_setup |
123 | |
124 | Used as: |
125 | |
126 | on_connect_call => 'datetime_setup' |
127 | |
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128 | In L<connect_info|DBIx::Class::Storage::DBI/connect_info> to set the date and |
129 | timestamp formats (as temporary options for the session) for use with |
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130 | L<DBIx::Class::InflateColumn::DateTime>. |
131 | |
132 | The C<TIMESTAMP> data type supports up to 6 digits after the decimal point for |
133 | second precision. The full precision is used. |
134 | |
135 | The C<DATE> data type supposedly stores hours and minutes too, according to the |
136 | documentation, but I could not get that to work. It seems to only store the |
137 | date. |
138 | |
139 | You will need the L<DateTime::Format::Strptime> module for inflation to work. |
140 | |
141 | =cut |
142 | |
143 | sub connect_call_datetime_setup { |
144 | my $self = shift; |
145 | |
146 | $self->_do_query( |
147 | "set temporary option timestamp_format = 'yyyy-mm-dd hh:mm:ss.ssssss'" |
148 | ); |
149 | $self->_do_query( |
150 | "set temporary option date_format = 'yyyy-mm-dd hh:mm:ss.ssssss'" |
151 | ); |
152 | } |
153 | |
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154 | sub _svp_begin { |
155 | my ($self, $name) = @_; |
156 | |
157 | $self->_get_dbh->do("SAVEPOINT $name"); |
158 | } |
159 | |
160 | # can't release savepoints that have been rolled back |
161 | sub _svp_release { 1 } |
162 | |
163 | sub _svp_rollback { |
164 | my ($self, $name) = @_; |
165 | |
166 | $self->_get_dbh->do("ROLLBACK TO SAVEPOINT $name") |
167 | } |
168 | |
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169 | 1; |
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170 | |
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171 | =head1 MAXIMUM CURSORS |
172 | |
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173 | A L<DBIx::Class> application can use a lot of cursors, due to the usage of |
174 | L<prepare_cached|DBI/prepare_cached>. |
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175 | |
176 | The default cursor maximum is C<50>, which can be a bit too low. This limit can |
177 | be turned off (or increased) by the DBA by executing: |
178 | |
179 | set option max_statement_count = 0 |
180 | set option max_cursor_count = 0 |
181 | |
182 | Highly recommended. |
183 | |
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184 | =head1 AUTHOR |
185 | |
186 | See L<DBIx::Class/AUTHOR> and L<DBIx::Class/CONTRIBUTORS>. |
187 | |
188 | =head1 LICENSE |
189 | |
190 | You may distribute this code under the same terms as Perl itself. |
191 | |
192 | =cut |