I have a database with several tables and I want to add the data and structure of a selection of them to a different database containing already different tables.
I have created the dump file in the following way:
"C:\Program Files\PostgreSQL\9.1\bin\pg_dump.exe" -U postgres -w DBName -t table1 -t Table2 -t Table3 > "E:\Dump.sql"
This works fine and I have E:\Dump.sql with the dump of the three tables in it.
I have tried to make a restore with the following code:
"C:\Program Files\PostgreSQL\9.6\bin\pg_dump.exe" -C -U User -t table1 -t Table2 -t Table4 destdb < Dump.sql
but I get the error
no matching tables were found
.
Where am I doing wrong?
https://www.postgresql.org/docs/current/static/backup-dump.html
pg_dump is meant for **taking* backups, next section of manual is for restoring a backup:
Text files created by pg_dump are intended to be read in by the psql
program. The general command form to restore a dump is
psql dbname < infile
Also you mention three tables, two of which are mixed case - in order for it to work, you have to double quote it I believe. But anyway - restoring for you file would be:
psql YOURDBNAME -f E:\Dump.sql
Related
Among the hundreds of tables in the postgres DB, only the structure dump of tables starting with a specific name is found.
Example
the name of the table
abc
abc_hello
abc_hi
def
def_hello
def_hi
If you think there is
I want to dump only tables starting with abc*.
pg_dump abc.txt -Fp -t abc* -s DBName
However, it was not recognized because the amount of tables was too large.
it answered,
pg_dump: error: too many command-line arguments (first is "DBName")
but this command works fine
pg_dump abc_hello.txt -Fp -t abc_hello -s DBName
How can I pick them out?
Your main mistake is that you didn't consider that * also is a special character for the shell. If you run
pg_dump -t abc* mydatabase
the shell will replace abc* with the names of all files in the current directory that start with abc, so that your command will actually be something like
pg_dump -t abcfile1 abcfile2 abcfile3 mydatabase
which is syntactically not correct and will make pg_dump complain.
You have to protect the asterisk from being expanded by the shell with single quotes:
pg_dump -t 'abc*' mydatabase
The other error in your command line is that you forgot the -f in -f abc.txt.
I am dumping a large Postgres table like this:
pg_dump -h myserver -U mt_user --table=mytable -Fc -Z 9 --file mytable.dump mydb
The above creates a mytable.dump file. I now want to restore this dump into a new table called mytable_restored.
How can I use the pg_restore command to do this?
There is no pg_restore option to rename tables.
I would do it like this:
-- create a table that is defined like the original
CREATE TABLE mytable_restored (LIKE mytable INCLUDING ALL);
-- copy the table contents
COPY mytable TO '/tmp/mytable.dmp';
COPY mytable_restored FROM '/tmp/mytable.dmp';
you can append sed to your pg_dump so that while pg_dump outputs the table name, sed will replace it with the right one.
pg_dump mytable mydb | sed 's/mytable/mytable_restored/g' > mytable_restored.dump
My answer may not the exact answer for the question but for my case (directory dump with many tables), I have improved Laurenz's answer, it may be useful.
In my case I have just needed two tables to restore to another location.
First I created the tables in new location.
I find the table data in the toc.dat file.
pg_restore -Fd <dir_name> -l | grep <table_name>
This will probably return more than single line. Then we look for "TABLE DATA" line. After getting [file_number].dat.gz file and use it in copy command like below in psql.
COPY <table_name> from PROGRAM 'zcat /<path>/<file_number>.dat.gz'
I want to get an export of my Heroku application's Postgres database, however I want to exclude one table. Is this possible?
Here is the command I use to export my entire Postgres database:
$ PGUSER=my_username PGPASSWORD=my_password heroku pg:pull DATABASE_URL my-application-name`
Maybe there is a way to exclude one table, or specify a list of tables to include?
In normal pg dump command you can specify the tables to include with -t option and exclude tables with -T option.
Can you try this :
$ PGPASSWORD=mypassword pg_dump -Fc --no-acl --no-owner -T *table you want to exclude* -h localhost -U myuser mydb > mydb.dump
Here is the document copied from postgreql official document.
-T table
--exclude-table=table
Do not dump any tables matching the table pattern. The pattern is interpreted according to the same rules as for -t. -T can be given more than once to exclude tables matching any of several patterns.
When both -t and -T are given, the behavior is to dump just the tables that match at least one -t switch but no -T switches. If -T appears without -t, then tables matching -T are excluded from what is otherwise a normal dump.
here is link for your reference
http://www.postgresql.org/docs/9.1/static/app-pgdump.html
I have a Postgres RDS instance for one of my apps.
I need to copy 3 tables from it to a similar clone of the database.
I see mytable_id_seq tables also, which now I know are called sequences in postgres terminology.
When I created a dump of those three tables, and restore them, do I have to do anything with the _id_seq sequences ?
Do I have to restore them too, for the dump data to work as it did in the original table?
When you restore the entire database from a dump, it contains CREATE SEQUENCE statements by default. These statements initialize sequences to the proper state. But if you make a partial dump, with only selected tables, you must set sequences manualy.
Assuming, that your table's name is "clip", you can check the current value using this query:
SELECT last_value FROM clip_id_seq
And if you want to update the sequence after restore, you can do it with this simple query:
SELECT SETVAL('clip_id_seq', SELECT MAX(id) FROM clip)
pg_dump -d database_name -t mg_cnd -F c > database_backup.sql
pg_restore -U database_user --data-only -d database_name -t mg_cnd -F c <file_location>
-d = database name
-t = table name
-F = Format
c = plain
-U = User
--data-only = transfer only table data
pg_dump documentation
pg_restore documentation
I have a database with hundreds of tables, what I need to do is export specified tables and insert statements for the data to one sql file.
The only statement I know can achieve this is
pg_dump -D -a -t zones_seq interway > /tmp/zones_seq.sql
Should I run this statement for each and every table or is there a way to run a similar statement to export all selected tables into one big sql big. The pg_dump above does not export the table schema only inserts, I need both
Any help will be appreciated.
Right from the manual: "Multiple tables can be selected by writing multiple -t switches"
So you need to list all of your tables
pg_dump --column-inserts -a -t zones_seq -t interway -t table_3 ... > /tmp/zones_seq.sql
Note that if you have several table with the same prefix (or suffix) you can also use wildcards to select them with the -t parameter:
"Also, the table parameter is interpreted as a pattern according to the same rules used by psql's \d commands"
If those specific tables match a particular pattern, you can use that with the -t option in pg_dump.
pg_dump -D -a -t zones_seq -t interway -t "<pattern>" -f /tmp/zones_seq.sql <DBNAME>
For example to dump tables which start with "test", you can use
pg_dump -D -a -t zones_seq -t interway -t "^test*" -f /tmp/zones_seq.sql <DBNAME>