Copies a database table to or from an operating system file in a user-specified format. bcp is located in $SYBASE/$SYBASE_OCS/bin.
Windows The utility is bcp.exe, and is located in %SYBASE%\%SYBASE_OCS%\bin.
bcp [[database_name.]owner.]table_name [: [ partition_id | slice_number ] |
partition partition_name] {in | out} datafile
[--show-fi]
[--hide-vcc]
[-f formatfile]
[-e errfile]
[-F firstrow]
[-L lastrow]
[-b batchsize]
[-m maxerrors]
[-n]
[-c]
[-t field_terminator]
[-r row_terminator]
[ -U username]
[-P password]
[-I interfaces_file]
[-S server]
[-a display_charset]
[-z language]
[-A packet_size]
[-J client_charset]
[-T text_or_image_size]
[-E]
[-g id_start_value]
[-N]
[-X]
[-K keytab_file]
[-R remote_server_principal]
[-V [security_options]]
[-Z security_mechanism]
[-Q]
[-Y]
[--maxconn maximum_connections
Or
bcp -v
the maximum number of parallel connections permitted for each bulk copy operation. The default is 10.
instructs bcp to copy functional indexes, while using either bcp IN or bcp OUT.
Using this option sends the data from a functional index to or from the server.
instructs bcp not to copy virtual computed columns either to or from a datafile. When you use this option in bcp OUT, the data file contains no data for virtual computed columns. When you use it in bcp IN, the data file may contain no data for a virtual computed column.
If this option is used, Adaptive Server does not calculate or send virtual computed column data.
is optional if the table being copied is in your default database or in master. Otherwise, you must specify a database name.
is optional if you or the Database Owner owns the table being copied. If you do not specify an owner, bcp looks first for a table of that name that you own, and then looks for one owned by the Database Owner. If another user owns the table, you must specify the owner name or the command fails.
is the name of the database table to copy. The table name cannot be a Transact-SQL reserved word.
specifies the partition number into which data is to be copied. It is supported only for bcp in. It is the equivalent of slice_number in Adaptive Server 12.5.x.
specifies the partition slice into which data is to be copied. It is supported only for bcp in and only for round-robin partitioned tables in Adaptive Server 15.0 and later.
specifies a set of one or more partitions, separated by commas.
is the direction of the copy. in indicates a copy from a file into the database table; out indicates a copy to a file from the database table or view.
specifies a set of one or more unique data files, separated by commas. It is supported for both bcp in and bcp out. The path name can be from 1 to 255 characters in length.
is the full path name of a file with stored responses from a previous use of bcp on the same table. After you answer bcp’s format questions, it prompts you to save your answers in a format file. Creation of the format file is optional. The default file name is bcp.fmt. The bcp program can refer to a format file when you are copying data so that you do not have to duplicate your previous format responses interactively. Use the -f parameter only if you previously created a format file that you want to use now for a copy in or copy out. If you do not specify this parameter, bcp interactively queries you for format information.
is the full path name of an error file where bcp stores any rows that it was unable to transfer from the file to the database. Error messages from bcp appear on your terminal. bcp creates an error file only when you specify this parameter.
is the number of the first row to copy from an input file (default is the first row).
Avoid using the -F option when performing heavy-duty, multi-process copying, as it causes bcp to generally spend more effort to run, and does not provide you with a faster process. Instead, use -F for single-process, ad-hoc copying.
is the number of the last row to copy from an input file (default is the last row).
is the number of rows per batch of data copied. By default, bcp in copies n rows in one batch, where n is equal to the batch size. Batching applies only when you are bulk copying in; it has no effect on bulk copying out. The smallest number bcp accepts for batchsize is 1.
Setting
the batch size to 1 causes Adaptive Server to allocate one data page
to one row copied in. This option only applies to fast bcp, and is only useful in
locating corrupt rows of data. Use -b1 with
care — doing so causes a new page to be allocated for each
row, and is a poor use of space.
is the maximum number of nonfatal errors permitted before bcp aborts the copy. bcp discards each row that it cannot insert (due to a data conversion error, or an attempt to insert a null value into a column that does not allow them), counting each rejected row as one error. If you do not include this parameter, bcp uses a default value of 10.
performs the copy operation using native (operating system) formats. Specifying the -n parameter means bcp will not prompt for each field. Files in native data format are not human-readable.
WARNING! Do not use bcp in native format for data recovery or salvage or to resolve an emergency situation. Do not use bcp in native format to transport data between different hardware platforms, different operating systems, or different major releases of Adaptive Server. Do not use field terminators (-t) or row terminators (-r) with bcp in native format. Results are unpredictable and data may become corrupted. Using bcp in native format can create flat files that cannot be reloaded into Adaptive Server and it may be impossible to recover the data. If you cannot rerun bcp in character format (for example, a table was truncated or dropped, hardware damage occurred, a database was dropped, and so on) the data is unrecoverable.
performs the copy operation with char datatype as the default
storage type of all columns in the data file. Use this format if
you are sharing data between platforms. This parameter does not
prompt for each field; it uses char as
the default storage type, no prefixes, \t (tab)
as the default field terminator, and \n (new
line) as the default row terminator.
specifies the default field terminator.
specifies the row terminator.
WARNING! Do not use -t or -r parameters with bcp in native format. Results are unpredictable and data may become corrupted.
When specifying terminators from the command line with the -t or -r parameter, you must escape characters that have special significance to the UNIX operating system (or the command prompt shell for Windows). See the examples for bcp for more information. Either place a backslash in front of the special character or enclose it in quotes. This is not necessary when bcp prompts you (interactive mode).
specifies an Adaptive Server login name.
specifies an Adaptive Server password. If you do not specify -Ppassword, bcp prompts for a password. You can leave out the -P flag if your password is NULL.
specifies the name and location of the interfaces file to search when connecting to Adaptive Server. If you do not specify -I, bcp looks for an interfaces file (sql.ini in Windows) located in the directory specified by the SYBASE environment variable (ini directory in Windows).
specifies the name of the Adaptive Server to which to connect. If you specify -S with no argument, bcp uses the server specified by the DSQUERY environment variable.
allows you to run bcp from a terminal where the character set differs from that of the machine on which bcp is running. Use -a in conjunction with -J to specify the character set translation file (.xlt file) required for the conversion. Use -a without -J only if the client character set is the same as the default character set.
The following error message appears if the character translation file(s) named with the -a parameter is missing, or you mistype the name(s):
Error in attempting to determine the size of a pair of translation tables.:'stat' utility failed.
is the official name of an alternate language the server uses to display bcp prompts and messages. Without the -z flag, bcp uses the server’s default language.
You can add languages to an Adaptive Server during installation or afterwards, using either the langinstall utility (or langinst in Windows) or the sp_addlanguage stored procedure.
The following error message appears if an incorrect or unrecognized language is named with the -z parameter:
Unrecognized localization object. Using default value 'us_english'. Starting copy... => warning.
displays the version number of bcp and a copyright message and returns to the operating system.
specifies the network packet size to use for this bcp session. For example:
bcp pubs2..titles out table_out -A 4096
sets the packet size to 4096 bytes for this bcp session. packet_size must be between the values of the default network packet size and maximum network packet size configuration variables, and it must be a multiple of 512.
Use network packet sizes larger than the default to improve the performance of large bulk-copy operations.
specifies the character set to use on the client. bcp uses a filter to convert input between client_charset and the Adaptive Server character set.
-J client_charset requests that Adaptive Server convert to and from client_charset, the character set used on the client.
-J with no argument sets character set conversion to NULL. No conversion takes place. Use this if the client and server use the same character set.
Omitting -J sets the character set to a default for the platform, which may not necessarily be the character set that the client is using.
The following error message appears if an incorrect or unrecognized character set is named with the -J parameter:
Unrecognized localization object. Using default value 'iso_1'. Starting copy... => warning.
For more information about character sets and associated flags, see the System Administration Guide.
allows you to specify, in bytes, the maximum length of text or image data that Adaptive Server sends. The default is 32K. If a text or an image field is larger than the value of -T or the default, bcp does not send the overflow.
explicitly specifies the value of a table’s IDENTITY column.
By default, when you bulk copy data into a table with an IDENTITY column, bcp assigns each row a temporary IDENTITY column value of 0. This is effective only when copying data into a table. bcp reads the value of the ID column from the data file, but does not send it to the server. Instead, as bcp inserts each row into the table, the server assigns the row a unique, sequential, IDENTITY column value, beginning with the value 1. If you specify the -E flag when copying data into a table, bcp reads the value from the data file and sends it to the server which inserts the value into the table. If the number of rows inserted exceeds the maximum possible IDENTITY column value, Adaptive Server returns an error.
The -E parameter has no effect when you are bulk copying data out. Adaptive Server copies the ID column to the data file, unless you use the -N parameter.
You cannot use the -E and -g flags together.
specifies the value of the IDENTITY column to use as a starting point for copying data in.
You cannot use the -g and -E flags together.
skips the IDENTITY column. Use this parameter when copying data in if your host data file does not include a placeholder for the IDENTITY column values, or when copying data out, if you do not want to include the IDENTITY column information in the host file.
You cannot use both -N and -E parameters when copying data in.
specifies that, in this connection to the server, the application initiates the login with client-side password encryption. bcp (the client) specifies to the server that password encryption is desired. The server sends back an encryption key, which bcp uses to encrypt your password, and the server uses the key to authenticate your password when it arrives.
If bcp crashes, the system creates a core file that contains your password. If you did not use the encryption option, the password appears in plain text in the file. If you used the encryption option, your password is not readable.
specifies the path to the keytab file used for authentication in DCE.
specifies the principal name for the server as defined to the security mechanism. By default, a server’s principal name matches the server’s network name (which is specified with the -S parameter or the DSQUERY environment variable). Use the -R parameter when the server’s principal name and network name are not the same.
specifies network-based user authentication. With this option, the user must log in to the network’s security system before running the utility. In this case, users must supply their network user name with the -U option; any password supplied with the -P option is ignored.
-V can be followed by a security_options string of key-letter options to enable additional security services. These key letters are:
c – Enable data confidentiality service
i – Enable data integrity service
m – Enable mutual authentication for connection establishment
o – Enable data origin stamping service
r – Enable data replay detection
q – Enable out-of-sequence detection
specifies the name of a security mechanism to use on the connection.
Security mechanism names are defined in the $SYBASE/install/libtcl.cfg configuration file. If no security_mechanism name is supplied, the default mechanism is used. For more information on security mechanism names, see the description of the libtcl.cfg file in the Open Client and Open Server Configuration Guide.
provides backward compatibility with bcp version 10.0.4 for copying operations involving nullable columns.
specifies that character-set conversion is disabled in the server, and is instead performed by bcp on the client side when using bcp IN.
A client-side Unicode conversion is supported only for
Adaptive Server 15.0 and later.
All character-set conversion is done in the
server during bcp OUT.
is the maximum number of parallel connections that the bcp client can open to the server. If --maxconn is not specified, bcp determines the number of connections to use.
In UNIX platforms – The first backslash before the final “r” escapes the second so that only one backslash is printed:
bcp pubs2..publishers out pub_out -c -t , -r \\r
In Windows:
bcp pubs2..publishers out pub_out -c -t , -r \r
Copies data from the publishers table to a file named pub_out for later reloading into Adaptive Server. Press Return to accept the defaults specified by the prompts. The same prompts appear when you copy data into the publishers table:
bcp pubs2..publishers out pub_out
Password: Enter the file storage type of field pub_id [char]: Enter prefix length of field pub_id [0]: Enter length of field pub_id [4]: Enter field terminator [none]: Enter the file storage type of field pub_name [char]: Enter prefix length of field pub_name [1]: Enter length of field pub_name [40]: Enter field terminator [none]: Enter the file storage type of field city [char]: Enter prefix length of field city [1]: Enter length of field city [20]: Enter field terminator [none]: Enter the file storage type of field state [char]: Enter prefix length of field state [1]: Enter length of field state [2]: Enter field terminator [none]:
In UNIX, you are then asked:
Do you want to save this format information in a file? [Y-n] y Host filename [bcp.fmt]: pub_form Starting copy... 3 rows copied. Clock Time (ms.): total = 1 Avg = 0 (3000.00 rows per sec.)
Copies data back into Adaptive Server using the saved format file, pub_form:
bcp pubs2..publishers in pub_out -f pub_form
Enter the single letter exactly as it appears below:
To see examples of datatypes, enter "?" at the prompt:
Enter the file storage type of field 'pub_id' ['char']:? Invalid column type. Valid types are: <cr>: same type as Adaptive Server column. c : char T : text i : int s : smallint t : tinyint f : float m : money b : bit d : datetime x : binary I : image D : smalldatetime r : real M : smallmoney n : numeric e : decimal
Copies a data file created with a character set used on a VT200 terminal into the pubs2..publishers table. The -z flag displays bcp messages in French:
bcp pubs2..publishers in vt200_data -J iso_1 -z french
UNIX platforms only – Specifies that you are using a Macintosh, running bcp on a workstation that is using roman8:
bcp pubs2..publishers in -a mac -J roman8
Specifies that Adaptive Server send 40K of text or image data using a packet size of 4096 bytes:
bcp pubs2..publishers out -T 40960 -A 4096
Sets 2 as the maximum number of parallel connections permitted for each operation.
bcp_r --maxconn 2
Copies the mypart.dat file of the current directory to partition p1 of table t1.
bcp t1 partition p1 in mypart.dat
Copies partition p1, p2, and p3 to files a, b, and c respectively, into the \work2\data directory.
bcp t1 partition p1, p2, p3 out \work2\data\1, \work2\data\b, \work2\data\c
Use this syntax for bcp if you are using threaded drivers.
You cannot use named pipes to copy files in or out.
Error message format is different than earlier versions of bcp. If you have scripts that perform routines based on the values of these messages you may need to rewrite them, for example:
The display message that indicates the number of rows transferred has been changed. During a session, this version of bcp periodically reports a running total of rows transferred. This message replaces the "1000 rows transferred" message displayed by the previous bcp.
Using --hide-vcc improves performance, as Adaptive Server does not transfer and calculate data from virtual computed columns.
slice_number is included for backward compatibility with Adaptive Server 12.5.x and earlier, and can be used only with round-robin partitioned tables.
You can specify either partition_id or partition_name, not both.
You can specify multiple partitions and data files. Separate each partition name or data file name with commas.
If you provide no partition name, bcp copies to the entire table.
When using bcp out:
If partition_name and datafile are both specified, then either datafile must specify a single data file, or you must specify a one-to-one mapping between partition names and data files.
If datafile is not specified, data from each partition is copied to a file named for the named partition with a .dat extension. For example, if the partition name is ptn1, the data file is ptn1.dat.
When using bcp in:
If partition_name is specified, datafile must specify a corresponding number of data files
You must have an Adaptive Server account and the appropriate permissions on the database tables or views, as well as the operating system files to use in the transfer to use bcp.
To copy data into a table, you must have insert permission on the table.
To copy a table to an operating system file, you must have select permission on the following tables:
the table to copy
sysobjects
syscolumns
sysindexes
Values in event and extrainfo columns are:
Event |
Audit option |
Command or access audited |
Information in extrainfo |
|---|---|---|---|
4 |
bcp |
bcp in |
|
sysaudits_01 – sysaudits_08
See Chapter 4, “Using bcp to Transfer Data to and from Adaptive Server” for an in-depth discussion of bcp.
See the Performance and Tuning Guide for more information on how changing certain parameters can affect bcp for large batches.
Sytem procedures sp_audit, sp_dboption, sp_displayaudit
| Copyright © 2005. Sybase Inc. All rights reserved. |
|
|
