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Objects to export |
Select the objects you want exported from the database to the DMP file. |
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Additional Parameters |
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Direct |
Data is extracted directly, bypassing the SQL Command-processing layer. This method may be faster that a conventional path export. |
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Consistent |
Uses the SET TRANSACTION READ ONLY statement to ensure the data does not change during the execution of the export command.
Select this parameter if you anticipate other applications will update the data after an export has started.
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Note: Tables are usually exported in a single transaction. However, nested and partitioned tables may be exported as separate transactions. If nested or partitioned tables are being updated by other applications, the exported data may be inconsistent. To minimize this possibility without selecting the Consistent parameter, export those tables at a time when updates are not being performed. | |
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Record |
Records an incremental or cumulative export in the system tables SYS.INCEXP, SYS.INCFIL, and SYS.INCVID. |
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Compress |
| Selected |
Flags table data for consolidation into one initial extent upon import. If extent sizes are large (for example, because of the PCTINCREASE parameter), the allocated space will be larger than the space required to hold the data. |
| Not Selected |
Export uses the current storage parameters, including the values of initial extent size and next extent size. The values of the parameters may be the values specified in the CREATE TABLE or ALTER TABLE statements or the values modified by the database system. For example, the NEXT extent size value may be modified if the table grows and if the PCTINCREASE parameter is nonzero. |
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Note:
- Although the actual consolidation is performed upon import, you can specify the COMPRESS parameter only when you export, not when you import. The Export utility, not the Import utility, generates the data definitions, including the storage parameter definitions. Therefore, if you do not select Compress when you export, you can import the data in consolidated form only.
- Neither LOB data nor subpartition data is compressed. Rather, values of initial extent size and next extent size at the time of export are used.
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Buffer size (leave blank for default) |
The size, in bytes, of the buffer used to fetch rows. This parameter determines the maximum number of rows in an array fetched by Export.
Use the following formula to calculate the buffer size:
buffer_size = rows_in_array * maximum_row_size
If you specify zero, Export Tables fetches only one row at a time.
Tables with columns of type LOBs, LONG, BFILE, REF, ROWID, LOGICAL ROWID, or DATE are fetched one row at a time.
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Note: See your Oracle operating system-specific documentation to determine the default value for this parameter. | |
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Record Length |
The length, in bytes, of the file record. The RECORDLENGTH parameter is necessary when you must transfer the export file to another operating system that uses a different default value.
If you do not define this parameter, it defaults to your platform-dependent value for buffer size.
You can set RECORDLENGTH to any value equal to or greater than your system's buffer size. (The highest value is 64 KB.)
Changing the RECORDLENGTH parameter affects only the size of data that accumulates before writing to the disk. It does not affect the operating system file block size.
You can use this parameter to specify the size of the Export I/O buffer.
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Note: See your Oracle operating system-specific documentation to determine the proper value or how to create a file with a different record size. | |
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Statistics |
Select the type of database optimizer statistics to generate when the exported data is imported. |
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Provide a feedback dot each time n rows are exported |
Export should display a progress meter in the form of a period for n number of rows exported.
For example, if you specify FEEDBACK=10, Export displays a period each time 10 rows are exported.
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Note: The FEEDBACK value applies to all tables being exported; it cannot be set individually for each table. | | |
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Specify files |
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Output file name (.dmp) |
The names of the export dump files.
This field is mandatory. |
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Parameter file name (.dat) |
A name for the file that contains a list of import parameters.
This field is mandatory. |
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Log file name (.log) |
The name of the log file.
All informational and error messages are written to the log file. | |
