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Short Description
DBFDataWriter Attributes
Best Practices
See also

Short Description

DBFDataWriter writes data to dbase file(s).

Handles Character/Number/Logical/Date dBase data types.

The component can write a single file or a partitioned collection of files.

ComponentData output Input ports Output ports Transformation Transf. required Java CTL Auto-propagated metadata
DBFDataWriter.dbf file10


Port typeNumberRequiredDescriptionMetadata
Incoming data recordsFixed length


DBFDataWriter does not propagate metadata.

DBFDataWriter has no metadata template.

Input metadata has to be fixed-length as you are writing binary data.

DBFDataWriter Attributes

AttributeReqDescriptionPossible values
File URL
Specifies where data will be written to (a path to a .dbf file), see Supported File URL Formats for Writers .  

Character encoding of records written to the output. See Details

The default encoding depends on DEFAULT_CHARSET_DECODER in defaultProperties.

ISO-8859-1 | other 8bit fixed width encoding
Append  If records are printed into a non-empty file, they replace the previous content by default ( false ). If set to true, new records are appended at the end of the existing output file(s). false (default) | true
DBF type Type of the created DBF file (determined by the first byte of the file header). If you are unsure which type to choose, leave the attribute to default. 0x03 FoxBASE+ (default) | Dbase III plus, no memo | other dbf type byte
Create directories  When true, non-existing directories contained in the File URL path are automatically created. false (default) | true
Records per file  Maximum number of records to be written to each output file. If specified, the dollar sign(s) $ ('number of digits' placeholder) must be a part of the file name mask, see Supported File URL Formats for Writers 1 - N
Number of skipped records  Number of records/rows to be skipped before writing the first record to the output file, see Selecting Output Records. 0 (default) - N
Max number of records  Aggregate number of records/rows to be written to all output files, see Selecting Output Records. 0-N
Exclude fields  Sequence of field names that will not be written to the output (separated by semicolon). Can be used when the same fields serve as a part of Partition key.  
Partition key [ 2] Sequence of field names defining record distribution among multiple output files - records with the same Partition key are written to the same output file. Use semicolon ';' as field names separator. Depending on selected Partition file tag use the appropriate placeholder ($ or #) in the file name mask, see Partitioning Output into Different Output Files  
Partition lookup table [ 3] ID of a lookup table serving for selecting records that should be written to output file(s). See Partitioning Output into Different Output Files for more information.  
Partition file tag [ 2] By default, partitioned output files are numbered. If this attribute is set to Key file tag , output files are named according to the values of Partition key or Partition output fields . See Partitioning Output into Different Output Files for more information. Number file tag (default) | Key file tag
Partition output fields [ 3] Fields of Partition lookup table whose values are used as output file(s) names. See Partitioning Output into Different Output Files for more information.  
Partition unassigned file name  Name of the file which the unassigned records should be written into (if there are any). Unless specified, data records whose key values are not contained in Partition lookup table are discarded. See Partitioning Output into Different Output Files for more information.  
Sorted input  In case the partitioning into multiple output files is enabled, all output files are open at once. This could lead to undesirable memory footprint for many output files (thousands). Moreover, for example unix-based OS usually have very strict limitation of number of simultaneously open files (1024) per process. If you run into one of these limitations, consider sorting the data according to a partition key using one of our standard sorting components and set this attribute to true. The partitioning algorithm does not need to keep open all output files, just the last one is open at one time. See Partitioning Output into Different Output Files for more information.false (default) | true
Create empty files If set to false, prevents the component from creating an empty output file when there are no input records.true (default) | false

[ 2] Either both or neither of these two attributes must be specified.

[ 3] Either both or neither of these two attributes must be specified.


DBFDataWriter can be used to write UTF-8 encoded dBase files.

In general, DBFDataWriter can use any encoding for parsing. But be careful - every character at any column name (stored at header of the file) must be represented by single byte. Example: set UTF-8 encoding. It's possible to write Japanese characters stored at dBase file but column name must not contain such a character. Since the column name can contain single byte characters only, some charsets cannot be used (for example UTF-16).

Notes and Limitations

Writing to Remote and Compressed Files not Available

Output data can be stored locally only. Uploading via a remote transfer protocol and writing ZIP and TAR archives is not supported.

Lists and Maps

The structure of .dbf file is not suitable for reading and writing lists or maps. DBFDataWriter converts lists and maps to string before the writing, but there is no easy way to read them back as lists or maps.

Best Practices

We recommend users to explicitly specify Charset.

See also

Common Properties of Components
Specific Attribute Types
Common Properties of Writers
Writers Comparison