--_000_7965A9DCF12CC14984420BCC37B1608F25ABF311FBElzargrantc ou_
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Dear all,
I would like to know if it is possible to restore data to a pre-populated d=
b/table.
I was reading the man pages for pg_dump and pg_restore.
"The limitations of pg_restore are detailed below.
* When restoring data to a pre-existing table and the option...
Does that mean the table can exist and can be populated with data, pg_resto=
re will append the data to the db/table without deleting/dropping the exist=
ing data?
What I need to achieve is:
1 - Download the schema from an old DB
2 - Restore the schema to a new DB
3 - Point my application to the new DB, it will populate with new data
4 - at later date do a pg_dump to dump the data from old DB - (Should I use=
'COPY' statement instead of pg_dump?
5 - Restore the data only to the new DB - as in copying the data and append=
ing it to existing db/tables.
What is the natural behaviour of pg_restore, does it wipe the existing data=
on the existing DB, or it displays 'errors' and carries on copying the dat=
a?
I read there are ways of copying the data using 'COPY' statements, does tha=
t mean I can copy the data back without wiping the existing data?
Ps Thank you very much for all help you have given to me, and all the time =
you spent reading and also replying to my emails.
I am learning loads, still loads to learn but I am sure some day I will be =
helping as well.
Thank you very much
Best regards
Renato
Renato Oliveira
Systems Administrator
e-mail: renato.oliveira [at] grant.co.uk
Tel: +44 (0)1763 260811
Fax: +44 (0)1763 262410
www.grant.co.uk<http://www.grant.co.uk/>
Grant Instruments (Cambridge) Ltd
Company registered in England, registration number 658133
Registered office address:
29 Station Road,
Shepreth,
CAMBS SG8 6GB
UK
P Please consider the environment before printing this email
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<div class=3DSection1>
<p class=3DMsoNormal>Dear all,<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>I would like to know if it is possible to restore data=
to a
pre-populated db/table.<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>I was reading the man pages for <span style=3D'font-fa=
mily:
"Courier New"'>pg_dump</span> and <span style=3D'font-family:"Courier New"'=
>pg_restore</span>.<o:p></o:p></p>
<p><span lang=3DEN style=3D'font-size:9.0pt;font-family:"Verdana","sans-ser=
if";
color:black'>“</span><span lang=3DEN style=3D'font-size:9.0pt;font-fa=
mily:
"Courier New";color:black'>The limitations of <span class=3Dapplication>pg_=
restore</span>
are detailed below. <o:p></o:p></span></p>
<p style=3D'margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo1'=
><![if !supportLists]><tt><span style=3D'font-size:10.0pt;font-family:Symbo=
l'><span style=3D'mso-list:Ignore'>·<span style=3D'font:7.0pt "Times=
New Roman"'>
</span></span></span></tt><![endif]><span lang=3DEN style=3D'font-size:9.0p=
t;
font-family:"Courier New";color:black'>When restoring data to a pre-existin=
g
table and the option...</span><tt><span style=3D'font-family:"Times New Rom=
an","serif"'><o:p></o:p></span></tt></p>
<p>Does that mean the table can exist and can be populated with data,
pg_restore will append the data to the db/table without deleting/dropping t=
he
existing data?<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>What I need to achieve is:<o:p></o:p></p>
<p class=3DMsoNormal>1 – Download the schema from an old DB<o:p></o:p=
></p>
<p class=3DMsoNormal>2 – Restore the schema to a new DB<o:p></o:p></p=
>
<p class=3DMsoNormal>3 – Point my application to the new DB, it will
populate with new data<o:p></o:p></p>
<p class=3DMsoNormal>4 – at later date do a pg_dump to dump the data =
from
old DB – (Should I use ‘COPY’ statement instead of pg_dum=
p?<o:p></o:p></p>
<p class=3DMsoNormal>5 – Restore the data only to the new DB – =
as in
copying the data and appending it to existing db/tables.<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>What is the natural behaviour of pg_restore, does it w=
ipe
the existing data on the existing DB, or it displays ‘errors’ a=
nd
carries on copying the data?<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>I read there are ways of copying the data using ‘=
;COPY’
statements, does that mean I can copy the data back without wiping the exis=
ting
data?<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>Ps Thank you very much for all help you have given to =
me,
and all the time you spent reading and also replying to my emails.<o:p></o:=
p></p>
<p class=3DMsoNormal>I am learning loads, still loads to learn but I am sur=
e some
day I will be helping as well.<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>Thank you very much<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>Best regards<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>Renato<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
</div>
</FONT></DIV>
<DIV><FONT FACE=3D"Arial" SIZE=3D"2"></FONT> </DIV>
<DIV><FONT FACE=3D"Arial" SIZE=3D"2"><FONT FACE=3D"Arial" SIZE=3D"2">Renato=
Oliveira<BR>Systems Administrator<BR>e-mail: renato.oliveira [at] grant.co.uk</=
FONT></FONT><FONT FACE=3D"Arial" SIZE=3D"2"><FONT FACE=3D"Arial" SIZE=3D"2"=
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></FONT> </DIV>
<DIV><FONT FACE=3D"Arial" SIZE=3D"2"><FONT FACE=3D"Arial" SIZE=3D"2">Tel: +=
44 (0)1763 260811<BR>Fax: +44 (0)1763 262410<BR><A HREF=3D"http://www.grant=
..co.uk/">www.grant.co.uk</A></FONT></FONT></DIV>
<DIV><FONT FACE=3D"Arial" SIZE=3D"2"><FONT FACE=3D"Arial" SIZE=3D"2"></FONT=
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<DIV><FONT FACE=3D"Arial" SIZE=3D"2"><FONT FACE=3D"Arial" SIZE=3D"2">Grant =
Instruments (Cambridge) Ltd <BR> <BR>Company registered in England, re=
gistration number 658133<BR> <BR>Registered office address:<BR>29 Stat=
ion Road, <BR>Shepreth, <BR>CAMBS SG8 6GB <BR>UK</FONT></FONT></DIV>
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