Data/Transfer/Sync.pod

=pod


=head1 NEWS


=head4 2003-02-22  -  enabled multiple task in-process synchronization ...

  x using Data::Rap and rap.pl
  x broke sync.pl...
  o ... re-enable via Data::Transfer::Sync::API::V1?


=head4 2003-02-09  -  backward compatibility with custom application

  - Tangram <-> .csv
  - Tangram <-> mysql
  - Tangram <-> perl-code


=head4 2003-01-18  -  started integration with Torus

  - MAPI <-> LDAP
  - please visit http://www.netfrag.org/horde/chora/cvs.php/perl/scripts/outlook2ldap/


=head4 2002-10-10  -  initial commit

  - Tangram <-> mysql


=head1 DESCRIPTION

  Data::Transfer::Sync is a module providing a generic synchronization process
  across arbitrary/multiple storages based on a ident/checksum mechanism.
  It sits on top of Data::Storage.


=head1 REQUIREMENTS

=head3 dependencies

  from CPAN or (for win32) a ppm-repository:
    App::Config (CPAN only)
    Tie::IxHash
    Log::Dispatch
    Log::Dispatch::Config
    mixin
    Hash::Merge
    Tie::SecureHash
    Date::Manip
    Digest::MD5
    ... and maybe some more.

  from nfo/perl/libs:
    Data::Compare
    Data::Storage
    Data::Transform
    DesignPattern:: (to be renamed into Class::)
    ... and all their dependencies. (like Data::UUID & Co.)


=head3 additional modules required for 'outlook2ldap'

    Win32::OLE
    Net::LDAP

=head3 additional modules required for 'db2db'

    DBI
    DBD::mysql
    DBD::CSV
    Tangram


=head1 AUTHORS / COPYRIGHT / LICENSE

  The Data::Transfer::Sync module is Copyright (c) 2002, 2003 Andreas Motl.
  All Rights Reserved.

  Code contributions, suggestions, support and ideas by
  Sebastian Utz <su@tunemedia.de> and Jan Hoffmann <janosch@ultrajan.de>.
  
  You may distribute it under the terms of either the GNU General Public
  License or the Artistic License, as specified in the Perl README file.


=head1 COPYRIGHT NOTE

  * CAESAR - Collaborative And Easy System ARchitecture
  *
  * Data Synchronization Module
  *
  * Permission to use, copy, modify and distribute this software and its
  * documentation is hereby granted, provided that both the copyright
  * notice and this permission notice appear in all copies of the
  * software, derivative works or modified versions, and any portions
  * thereof, and that both notices appear in supporting documentation.
  * 
  * NETFRAG.ORG AND THE AUTHOR ALLOW FREE USE OF THIS SOFTWARE 
  * IN ITS "AS IS" CONDITION. WE DISCLAIM ANY LIABILITY OF ANY KIND
  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 

=head1 SUPPORT / WARRANTY

  Data::Transfer::Sync is free software. IT COMES WITHOUT WARRANTY OF ANY KIND.

  Please feel free to contact me at <andreas.motl@ilo.de>.

  Any improvements and contributions are greatly appreciated.

  We have set up a newsgroup. (currently not much traffic)
  Be welcome to visit news://news.netfrag.org/nfo.caesar or - if your system 
  lacks a newsreader - try http://news.netfrag.org/nfo.caesar .
  

=head1 TODO

=head4 overall

  o try to get this stuff together with SyncML (http://syncml.org/) somehow ...?


=head4 this code

  o sub _resolveIdentProvider
  x wrap _doModifySource and _doTransferTarget around a core function which can change virtually any type of node
  x split this module up into Sync.pm, Sync/Core.pm, Sync/Compare.pm and Sync/Compare/Checksum.pm
  o introduce _compareNodes as a core method and wrap it around methods in Sync/Compare/Checksum.pm
  x introduce Sync/Compare/MyComparisonImplementation.pm
  o some generic deferring method - e.g. "$self->defer(action)" - to be able to accumulate a bunch of actions for later processing
     - this implies everything done is _really_ split up into generic actions - how else would we defer them???
     - example uses:
        - fetch whole checksum list from node
        - remember source ident retransmits
     - remember: this is convenient - and maybe / of course faster - but we'll loose "per-node-atomic" operations
  o feature: mechanism to implicit inject checksum property to nodes (alter table / modify schema)
  o expand statistics / keep track of:
    - touched/untouched nodes
  o full sync
    - just do a push and a pull for now but use stats for touched nodes in between to speed up things
  o introduce some new metadata flags for a descent
    - isNewNodePropagator
    x isWriteProtected


=head1 EXAMPLE OUTPUT CHUNKS

=head2 Synchronizing orm objects against entries in a .csv file - 17 items modified

  notice: PULL INTO backend NODE * TYPE Country SELECT NODE * TYPE [n/a] FROM base USING MODULE MyApp::ResourceMapping;
  notice: OEF::Script::AbstractFeeder:
      - Loading data of type [n/a] and
        filtered by * from the storage named base
        to the storage named backend - filtered by *.
      - Will attempt to convert the data to Country.
  info: Data::Transfer::Sync::API->syncNodes: source=backend/* [Country] <- target=base/* []
  :c:c:c:c:c:c:c:ctr:c:c:c:c:c:c:c:ctr:c:c:c:c:c:c:ctr:c:ctr:c:c:c:c:c:c:c:c:c:c:c:ctr:c:c:c:ctr:c:c:c:c:c:c:c:ctr:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c
  :c:c:c:c:c:c:c:c:ctr:c:c:c:c:c:c:c:c:c:c:c:ctr:c:c:c:c:ctr:c:c:c:ctr:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:ctr:ctr:c:c:c:c:ctr:c:c:c:c:c:c:c
  :c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:ctr:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:ctr:c:c:ctr:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c
  info: Data::Transfer::Sync::Core->_startsync: statistics: in_sync: 180  /  total: 197  /  attempt_modify: 17  /  ok: 17

=head2 Synchronizing orm objects against entries in a .csv file - all items in-sync
  
  notice: PULL INTO backend NODE * TYPE Country SELECT NODE * TYPE [n/a] FROM base USING MODULE MyApp::ResourceMapping;
  notice: OEF::Script::AbstractFeeder:
      - Loading data of type [n/a] and
        filtered by * from the storage named base
        to the storage named backend - filtered by *.
      - Will attempt to convert the data to Country.
  info: Data::Transfer::Sync::API->syncNodes: source=backend/* [Country] <- target=base/* []
  :c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c
  :c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c
  :c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c
  info: Data::Transfer::Sync::Core->_startsync: statistics: in_sync: 197  /  total: 197


=head1 BUGS

  When in "import" mode for windows file - DBD::AutoCSV may hang.
  Hint: Maybe the source node contains an ident-, but no checksum-column?


=head1 USER LEVEL ERRORS

=head4 Mapping

  - - - - - - - - - - - - - - - - - - - - - - - - - -
  info: MyApp::Process::Setup->syncResource( source_node Currency mode PULL erase 0 import 0 )critical: MyApp::Process::Setup->startSync: Can't access mapping for node "Currency" - please check MyApp::ResourceMapping.
  - - - - - - - - - - - - - - - - - - - - - - - - - -
  You have to create a sub for each node used in synchronization inside named Perl module. The name of this sub _must_ match
  the name of the node you want to sync. This sub holds mapping metadata to give the engine hints about how 
  to access the otherwise generic nodes.
  - - - - - - - - - - - - - - - - - - - - - - - - - -


=head4 DBD::AutoCSV's rulebase
  
  - - - - - - - - - - - - - - - - - - - - - - - - - -
  info: MyApp::Process::Setup->syncResource( source_node Currency mode PULL erase 0 import 0 )
  info: Data::Transfer::Sync->syncNodes: source=L/Currency <- target=R/currencies.csv
  
  Execution ERROR: Error while scanning: Missing first row or scanrule not applied. at C:/home/amo/develop/netfrag.org/nfo/perl/libs/DBD/CSV.p
  m line 165, <GEN9> line 1.
   called from C:/home/amo/develop/netfrag.org/nfo/perl/libs/Data/Storage/Handler/DBI.pm at 123.
  
  DBI-Error: DBD::AutoCSV::st fetchrow_hashref failed: Attempt to fetch row from a Non-SELECT statement
  notice: Data::Transfer::Sync->syncNodes: No nodes to synchronize.
  - - - - - - - - - - - - - - - - - - - - - - - - - -
  DBD::AutoCSV contains a rulebase which is spooled down while attempting to guess the style of the csv file regarding
  parameters like newline (eol), column-seperation-character (sep_char), quoting character (quote_char).
  If this spool runs out of entries and no style could be resolved, DBD::CSV dies causing this "Execution ERROR" which
  results in a "DBI-Error" afterwards.
  - - - - - - - - - - - - - - - - - - - - - - - - - -


=head4 Check structure of source node
  
  - - - - - - - - - - - - - - - - - - - - - - - - - -
  info: Data::Transfer::Sync->syncNodes: source=L/Currency <- target=R/currencies.csv
  critical: Data::Transfer::Sync->syncNodes: Can not synchronize: No ident found in source node, maybe try to "import" this node first.
  - - - - - - - - - - - - - - - - - - - - - - - - - -
  If lowlevel detection succeeds, but no other required informations are found, this message is issued.
  "Other informations" might be:
    - column-header-row completely missing
    - ident column is empty
  - - - - - - - - - - - - - - - - - - - - - - - - - -


=head4 Modify structure of source node
  
  - - - - - - - - - - - - - - - - - - - - - - - - - -
  info: Data::Transfer::Sync->syncNodes: source=L/Currency <- target=R/currencies.csv
  info: Data::Transfer::Sync->_prepareNode_MetaProperties( descent source )
  warning: Data::Transfer::Sync->_prepareNode_MetaProperties: node is lacking meta properties - will try to alter...
  SQL ERROR: Command 'ALTER' not recognized or not supported!
  
  SQL ERROR: Command 'ALTER' not recognized or not supported!
  - - - - - - - - - - - - - - - - - - - - - - - - - -
  The Engine found a node which structure does not match the required. It tries to alter this automatically - only when doing "import" - 
  but the DBD driver (in this case DBD::CSV) gets in the way croaking not to be able to do this.
  This could also appear if your database connection has insufficient rights to modify the database structure.
  DBD::CSV croaks because it doesn't implement the ALTER command, so please edit your columns manually.
  Hint: Add columns with the names of your "ident" and "checksum" property specifications.
  - - - - - - - - - - - - - - - - - - - - - - - - - -


=head4 Load source node by ident

  - - - - - - - - - - - - - - - - - - - - - - - - - -
  info: Data::Transfer::Sync->_prepareNode_DummyIdent( descent source )
  pcritical: Data::Transfer::Sync->_modifyNode failed: "source" node is empty.
  - - - - - - - - - - - - - - - - - - - - - - - - - -
  The source node could not be loaded. Maybe the ident is missing. Please check manually.
  Hint: Like above, the ident and/or checksum columns may be missing....
  - - - - - - - - - - - - - - - - - - - - - - - - - -


=cut
1	joko	1.1	=pod
2
3
4			=head1 NEWS
5
6
7	joko	1.6	=head4 2003-02-22 - enabled multiple task in-process synchronization ...
8
9			x using Data::Rap and rap.pl
10			x broke sync.pl...
11			o ... re-enable via Data::Transfer::Sync::API::V1?
12
13
14	joko	1.2	=head4 2003-02-09 - backward compatibility with custom application
15	joko	1.1
16	joko	1.2	- Tangram <-> .csv
17			- Tangram <-> mysql
18			- Tangram <-> perl-code
19
20
21	joko	1.6	=head4 2003-01-18 - started integration with Torus
22	joko	1.2
23			- MAPI <-> LDAP
24	joko	1.3	- please visit http://www.netfrag.org/horde/chora/cvs.php/perl/scripts/outlook2ldap/
25	joko	1.2
26
27			=head4 2002-10-10 - initial commit
28
29			- Tangram <-> mysql
30	joko	1.1
31
32
33			=head1 DESCRIPTION
34
35	joko	1.2	Data::Transfer::Sync is a module providing a generic synchronization process
36			across arbitrary/multiple storages based on a ident/checksum mechanism.
37			It sits on top of Data::Storage.
38
39	joko	1.1
40
41			=head1 REQUIREMENTS
42
43	joko	1.3	=head3 dependencies
44
45			from CPAN or (for win32) a ppm-repository:
46			App::Config (CPAN only)
47			Tie::IxHash
48			Log::Dispatch
49			Log::Dispatch::Config
50			mixin
51			Hash::Merge
52			Tie::SecureHash
53			Date::Manip
54			Digest::MD5
55			... and maybe some more.
56
57			from nfo/perl/libs:
58	joko	1.2	Data::Compare
59	joko	1.1	Data::Storage
60			Data::Transform
61	joko	1.3	DesignPattern:: (to be renamed into Class::)
62			... and all their dependencies. (like Data::UUID & Co.)
63
64
65			=head3 additional modules required for 'outlook2ldap'
66
67			Win32::OLE
68			Net::LDAP
69
70			=head3 additional modules required for 'db2db'
71
72			DBI
73			DBD::mysql
74			DBD::CSV
75			Tangram
76
77	joko	1.1
78
79	joko	1.2	=head1 AUTHORS / COPYRIGHT / LICENSE
80	joko	1.1
81	joko	1.4	The Data::Transfer::Sync module is Copyright (c) 2002, 2003 Andreas Motl.
82			All Rights Reserved.
83	joko	1.1
84	joko	1.2	Code contributions, suggestions, support and ideas by
85	joko	1.4	Sebastian Utz <su@tunemedia.de> and Jan Hoffmann <janosch@ultrajan.de>.
86	joko	1.2
87			You may distribute it under the terms of either the GNU General Public
88			License or the Artistic License, as specified in the Perl README file.
89	joko	1.1
90
91	joko	1.4	=head1 COPYRIGHT NOTE
92
93			* CAESAR - Collaborative And Easy System ARchitecture
94			*
95			* Data Synchronization Module
96			*
97			* Permission to use, copy, modify and distribute this software and its
98			* documentation is hereby granted, provided that both the copyright
99			* notice and this permission notice appear in all copies of the
100			* software, derivative works or modified versions, and any portions
101			* thereof, and that both notices appear in supporting documentation.
102			*
103			* NETFRAG.ORG AND THE AUTHOR ALLOW FREE USE OF THIS SOFTWARE
104			* IN ITS "AS IS" CONDITION. WE DISCLAIM ANY LIABILITY OF ANY KIND
105			* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
106
107
108
109	joko	1.1	=head1 SUPPORT / WARRANTY
110
111	joko	1.2	Data::Transfer::Sync is free software. IT COMES WITHOUT WARRANTY OF ANY KIND.
112
113			Please feel free to contact me at <andreas.motl@ilo.de>.
114	joko	1.5
115	joko	1.4	Any improvements and contributions are greatly appreciated.
116	joko	1.5
117	joko	1.4	We have set up a newsgroup. (currently not much traffic)
118			Be welcome to visit news://news.netfrag.org/nfo.caesar or - if your system
119	joko	1.5	lacks a newsreader - try http://news.netfrag.org/nfo.caesar .
120	joko	1.4
121
122
123
124			=head1 TODO
125
126			=head4 overall
127
128			o try to get this stuff together with SyncML (http://syncml.org/) somehow ...?
129
130
131			=head4 this code
132
133			o sub _resolveIdentProvider
134			x wrap _doModifySource and _doTransferTarget around a core function which can change virtually any type of node
135			x split this module up into Sync.pm, Sync/Core.pm, Sync/Compare.pm and Sync/Compare/Checksum.pm
136			o introduce _compareNodes as a core method and wrap it around methods in Sync/Compare/Checksum.pm
137			x introduce Sync/Compare/MyComparisonImplementation.pm
138			o some generic deferring method - e.g. "$self->defer(action)" - to be able to accumulate a bunch of actions for later processing
139			- this implies everything done is _really_ split up into generic actions - how else would we defer them???
140			- example uses:
141			- fetch whole checksum list from node
142			- remember source ident retransmits
143			- remember: this is convenient - and maybe / of course faster - but we'll loose "per-node-atomic" operations
144			o feature: mechanism to implicit inject checksum property to nodes (alter table / modify schema)
145			o expand statistics / keep track of:
146			- touched/untouched nodes
147			o full sync
148			- just do a push and a pull for now but use stats for touched nodes in between to speed up things
149			o introduce some new metadata flags for a descent
150			- isNewNodePropagator
151			x isWriteProtected
152	joko	1.2
153
154
155			=head1 EXAMPLE OUTPUT CHUNKS
156
157			=head2 Synchronizing orm objects against entries in a .csv file - 17 items modified
158
159	joko	1.4	notice: PULL INTO backend NODE * TYPE Country SELECT NODE * TYPE [n/a] FROM base USING MODULE MyApp::ResourceMapping;
160	joko	1.2	notice: OEF::Script::AbstractFeeder:
161			- Loading data of type [n/a] and
162			filtered by * from the storage named base
163			to the storage named backend - filtered by *.
164			- Will attempt to convert the data to Country.
165			info: Data::Transfer::Sync::API->syncNodes: source=backend/* [Country] <- target=base/* []
166			:c:c:c:c:c:c:c:ctr:c:c:c:c:c:c:c:ctr:c:c:c:c:c:c:ctr:c:ctr:c:c:c:c:c:c:c:c:c:c:c:ctr:c:c:c:ctr:c:c:c:c:c:c:c:ctr:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c
167			:c:c:c:c:c:c:c:c:ctr:c:c:c:c:c:c:c:c:c:c:c:ctr:c:c:c:c:ctr:c:c:c:ctr:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:ctr:ctr:c:c:c:c:ctr:c:c:c:c:c:c:c
168			:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:ctr:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:ctr:c:c:ctr:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c
169			info: Data::Transfer::Sync::Core->_startsync: statistics: in_sync: 180 / total: 197 / attempt_modify: 17 / ok: 17
170
171	joko	1.5	=head2 Synchronizing orm objects against entries in a .csv file - all items in-sync
172	joko	1.2
173	joko	1.4	notice: PULL INTO backend NODE * TYPE Country SELECT NODE * TYPE [n/a] FROM base USING MODULE MyApp::ResourceMapping;
174	joko	1.2	notice: OEF::Script::AbstractFeeder:
175			- Loading data of type [n/a] and
176			filtered by * from the storage named base
177			to the storage named backend - filtered by *.
178			- Will attempt to convert the data to Country.
179			info: Data::Transfer::Sync::API->syncNodes: source=backend/* [Country] <- target=base/* []
180			:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c
181			:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c
182			:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c:c
183			info: Data::Transfer::Sync::Core->_startsync: statistics: in_sync: 197 / total: 197
184	joko	1.1
185
186
187			=head1 BUGS
188
189			When in "import" mode for windows file - DBD::AutoCSV may hang.
190			Hint: Maybe the source node contains an ident-, but no checksum-column?
191
192
193			=head1 USER LEVEL ERRORS
194
195			=head4 Mapping
196
197			- - - - - - - - - - - - - - - - - - - - - - - - - -
198	joko	1.4	info: MyApp::Process::Setup->syncResource( source_node Currency mode PULL erase 0 import 0 )critical: MyApp::Process::Setup->startSync: Can't access mapping for node "Currency" - please check MyApp::ResourceMapping.
199	joko	1.1	- - - - - - - - - - - - - - - - - - - - - - - - - -
200			You have to create a sub for each node used in synchronization inside named Perl module. The name of this sub _must_ match
201			the name of the node you want to sync. This sub holds mapping metadata to give the engine hints about how
202			to access the otherwise generic nodes.
203			- - - - - - - - - - - - - - - - - - - - - - - - - -
204
205
206			=head4 DBD::AutoCSV's rulebase
207
208			- - - - - - - - - - - - - - - - - - - - - - - - - -
209	joko	1.4	info: MyApp::Process::Setup->syncResource( source_node Currency mode PULL erase 0 import 0 )
210	joko	1.1	info: Data::Transfer::Sync->syncNodes: source=L/Currency <- target=R/currencies.csv
211
212			Execution ERROR: Error while scanning: Missing first row or scanrule not applied. at C:/home/amo/develop/netfrag.org/nfo/perl/libs/DBD/CSV.p
213			m line 165, <GEN9> line 1.
214			called from C:/home/amo/develop/netfrag.org/nfo/perl/libs/Data/Storage/Handler/DBI.pm at 123.
215
216			DBI-Error: DBD::AutoCSV::st fetchrow_hashref failed: Attempt to fetch row from a Non-SELECT statement
217			notice: Data::Transfer::Sync->syncNodes: No nodes to synchronize.
218			- - - - - - - - - - - - - - - - - - - - - - - - - -
219			DBD::AutoCSV contains a rulebase which is spooled down while attempting to guess the style of the csv file regarding
220			parameters like newline (eol), column-seperation-character (sep_char), quoting character (quote_char).
221			If this spool runs out of entries and no style could be resolved, DBD::CSV dies causing this "Execution ERROR" which
222			results in a "DBI-Error" afterwards.
223			- - - - - - - - - - - - - - - - - - - - - - - - - -
224
225
226			=head4 Check structure of source node
227
228			- - - - - - - - - - - - - - - - - - - - - - - - - -
229			info: Data::Transfer::Sync->syncNodes: source=L/Currency <- target=R/currencies.csv
230			critical: Data::Transfer::Sync->syncNodes: Can not synchronize: No ident found in source node, maybe try to "import" this node first.
231			- - - - - - - - - - - - - - - - - - - - - - - - - -
232			If lowlevel detection succeeds, but no other required informations are found, this message is issued.
233			"Other informations" might be:
234			- column-header-row completely missing
235			- ident column is empty
236			- - - - - - - - - - - - - - - - - - - - - - - - - -
237
238
239			=head4 Modify structure of source node
240
241			- - - - - - - - - - - - - - - - - - - - - - - - - -
242			info: Data::Transfer::Sync->syncNodes: source=L/Currency <- target=R/currencies.csv
243			info: Data::Transfer::Sync->_prepareNode_MetaProperties( descent source )
244			warning: Data::Transfer::Sync->_prepareNode_MetaProperties: node is lacking meta properties - will try to alter...
245			SQL ERROR: Command 'ALTER' not recognized or not supported!
246
247			SQL ERROR: Command 'ALTER' not recognized or not supported!
248			- - - - - - - - - - - - - - - - - - - - - - - - - -
249			The Engine found a node which structure does not match the required. It tries to alter this automatically - only when doing "import" -
250			but the DBD driver (in this case DBD::CSV) gets in the way croaking not to be able to do this.
251			This could also appear if your database connection has insufficient rights to modify the database structure.
252			DBD::CSV croaks because it doesn't implement the ALTER command, so please edit your columns manually.
253			Hint: Add columns with the names of your "ident" and "checksum" property specifications.
254			- - - - - - - - - - - - - - - - - - - - - - - - - -
255
256
257			=head4 Load source node by ident
258
259			- - - - - - - - - - - - - - - - - - - - - - - - - -
260			info: Data::Transfer::Sync->_prepareNode_DummyIdent( descent source )
261			pcritical: Data::Transfer::Sync->_modifyNode failed: "source" node is empty.
262			- - - - - - - - - - - - - - - - - - - - - - - - - -
263			The source node could not be loaded. Maybe the ident is missing. Please check manually.
264			Hint: Like above, the ident and/or checksum columns may be missing....
265			- - - - - - - - - - - - - - - - - - - - - - - - - -
266
267
268
269
270			=cut
MailToCvsAdmin">MailToCvsAdmin	ViewVC Help
Powered by ViewVC 1.1.26