reindexdb — reindex a LightDB database
reindexdb [connection-option...] [option...]
[
-S | --schema
schema
]
...
[
-t | --table
table
]
...
[
-i | --index
index
]
... [dbname]
reindexdb [connection-option...] [option...] -a | --all
reindexdb [connection-option...] [option...] -s | --system [dbname]
reindexdb is a utility for rebuilding indexes in a LightDB database.
reindexdb is a wrapper around the SQL command REINDEX. There is no effective difference between reindexing databases via this utility and via other methods for accessing the server.
reindexdb accepts the following command-line arguments:
-a--allReindex all databases.
--concurrently
Use the CONCURRENTLY option. See
REINDEX, where all the caveats of this option
are explained in detail.
[-d] dbname[--dbname=]dbname
Specifies the name of the database to be reindexed,
when -a/--all is not used.
If this is not specified, the database name is read
from the environment variable LTDATABASE. If
that is not set, the user name specified for the connection is
used. The dbname can be a connection string. If so,
connection string parameters will override any conflicting command
line options.
-e--echoEcho the commands that reindexdb generates and sends to the server.
-i index--index=index
Recreate index only.
Multiple indexes can be recreated by writing multiple
-i switches.
-j njobs--jobs=njobs
Execute the reindex commands in parallel by running
njobs
commands simultaneously. This option may reduce the processing time
but it also increases the load on the database server.
reindexdb will open
njobs connections to the
database, so make sure your max_connections
setting is high enough to accommodate all connections.
Note that this option is incompatible with the --index
and --system options.
-q--quietDo not display progress messages.
-s--systemReindex database's system catalogs only.
-S schema--schema=schema
Reindex schema only.
Multiple schemas can be reindexed by writing multiple
-S switches.
-t table--table=table
Reindex table only.
Multiple tables can be reindexed by writing multiple
-t switches.
-v--verbosePrint detailed information during processing.
-V--versionPrint the reindexdb version and exit.
-?--helpShow help about reindexdb command line arguments, and exit.
reindexdb also accepts the following command-line arguments for connection parameters:
-h host--host=hostSpecifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.
-p port--port=portSpecifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.
-U username--username=usernameUser name to connect as.
-w--no-password
Never issue a password prompt. If the server requires
password authentication and a password is not available by
other means such as a .pgpass file, the
connection attempt will fail. This option can be useful in
batch jobs and scripts where no user is present to enter a
password.
-W--passwordForce reindexdb to prompt for a password before connecting to a database.
This option is never essential, since
reindexdb will automatically prompt
for a password if the server demands password authentication.
However, reindexdb will waste a
connection attempt finding out that the server wants a password.
In some cases it is worth typing -W to avoid the extra
connection attempt.
--maintenance-db=dbname
Specifies the name of the database to connect to to discover which
databases should be reindexed,
when -a/--all is used.
If not specified, the postgres database will be used,
or if that does not exist, template1 will be used.
This can be a connection
string. If so, connection string parameters will override any
conflicting command line options. Also, connection string parameters
other than the database name itself will be re-used when connecting
to other databases.
LTDATABASELTHOSTLTPORTLTUSERDefault connection parameters
LT_COLOR
Specifies whether to use color in diagnostic messages. Possible values
are always, auto and
never.
This utility, like most other LightDB utilities, also uses the environment variables supported by libpq (see Section 31.14).
In case of difficulty, see REINDEX and ltsql for discussions of potential problems and error messages. The database server must be running at the targeted host. Also, any default connection settings and environment variables used by the libpq front-end library will apply.
reindexdb might need to connect several
times to the LightDB server, asking
for a password each time. It is convenient to have a
~/.pgpass file in such cases. See Section 31.15 for more information.
To reindex the database test:
$reindexdb test
To reindex the table foo and the index
bar in a database named abcd:
$reindexdb --table=foo --index=bar abcd