Specifies list of columns to load. An empty col name indicates an input field that is to be ignored.

Default: All columns are loaded if no attributes argument is specified.

Detects GZ and ZIP files. Compressed files are automatically detected by the file contents, not by the file suffix. If you are loading from a directory or using a file name wildcard, you can mix regular text files, GZ, and ZIP.

Specifies the input character set (see vwload Supported Character Sets). CHARSET='ASCII' is also supported.

Default: no conversion

Sets date format for the column.

When no column is indicated, the format applies to all columns that are not otherwise set. That format must be defined last, without any assignment operation.

Valid values for format are described in vwload Date Format Settings.

Alternatively, a custom format string can be specified by starting the format with a '+' sign followed by the format string. The format string can consist of any of the format specifier characters used on the DATE_FORMAT function, described in the SQL Language Guide.

To be able to use any character in the format string (including for example, "," and "="), you must quote the format string in the same way that you would quote a delimited identifier on the command line (for example: 'ColX="+%M,%Y,%d",ColY=US'). For more information on delimited identifiers, see Regular and Delimited Identifiers on page 21.

Default: US

Examples:

Terminates after the first n errors in all input files. Default: 0 (do not terminate).

Specifies the escape character to use. This allows escaping of single characters to allow a delimiter character to be part of a field (for example: \) or to allow a quote character to be part of a quoted string.

The argument must be a single ASCII character or an empty string. If the argument is an empty string, this functionality is disabled. To specify a control character, use an escape sequence (see vwload Escape Sequences).

Default: none

Interprets data escape sequences

Specifies field delimiter to use. The delimiter must be a single character. To specify a control character, use an escape sequence (see vwload Escape Sequences).

Default: "|"

Skips header line in files.

Ignores the first field.

Ignores the last field.

Specifies the mode to use for inserts and merges. Valid modes are:

Inserts through the PDT (allows concurrent inserts)

Appends directly to disk (does not allow concurrent inserts)

Logs rejected rows and corresponding errors to the specified file. The file is created by the operation.

When –nullvalue is used, data may contain spaces in front of the null identifiers. This option applies to non-character columns only. For example, if --nullvalue NADA is specified, –nonchar_leading_spaces_null will interpret a DATE column containing “NADA” or “ NADA” as NULL.

Keeps empty strings. Does not consider the input value NULL if it is empty (that is, contains two consecutive field delimiters). For VARCHAR, the value becomes an empty string; for CHAR the value becomes blanks. This option applies only to CHAR, NCHAR, VARCHAR, and NVARCHAR columns that are NOT NULL.

Defines the string that identifies NULL values.

Default: ' '

By default, an empty string is treated as a null unless -n option is used. For example, suppose the following contents in data file a1.csv:

1|\n|
2|a|b
3||c

If we use COPY VWLOAD (t1) FROM a1.csv WITH NULLVALUE='\n', then 3rd row, 2nd column will have an empty string and not null; 1st row, 2nd column \n will be loaded as null as defined in NULLVALUE.

If we use COPY VWLOAD (t1) FROM a1.csv, then 3rd row, 2nd column will be loaded as null; 1st row, 2nd column will be loaded as '\n'.

Specifies the quote character(s) to use. This allows the input to contain quoted fields (for example "Doe, John"), which may contain field or record delimiter characters. To include a quote character inside a quoted field, enter it twice in the input--for example: "The ""BIG"" Boss". When using distinct open and close quote characters, enter only the close quote character twice--for example: [The [BIG]] Boss].

The argument must be one or two ASCII characters or an empty string.

If the argument is an empty string, this functionality is disabled. If the argument is two characters, the first character is used as the opening quote character, and the second as the closing quote character. For example, specify "[]" to allow [quoted string].

To specify a control character, use an escape sequence.

Default: none

Specifies record delimiter to use. The delimiter must be a single character. To specify a control character, use an escape sequence (see vwload Escape Sequences).

Default: "\n"

Turns “roll back on error” on or off.

(Default) Rolls back on error.

Does not roll back the load transaction when errors were encountered, causing partial data to be loaded.

Uses strict NULL value checking. This distinguishes between plain and quoted or escaped occurrences of a NULL representation. For example, NULL is a NULL value, whereas “NULL” is a 4-character string value. By default, vwload does not make this distinction. This option allows proper loading of some data generated by MySQL and PostgreSQL.

Substitutes the specified character for any invalid input character during character set conversion. When no substitute character is provided, an invalid input character is considered an error condition. Specifying a substitute character allows records that contain invalid characters to be loaded successfully.

The argument must be a single Unicode character or an empty string. If the argument is an empty string, the functionality is disabled.

To specify a control character or Unicode code point that cannot easily be typed on the keyboard, use an escape sequence (see vwload Escape Sequences).

Opens input files in text mode and does not perform newline conversion. On Linux, this may gain a 5 to 10 percent performance improvement. On Windows, there is no known advantage to using this option. (By default, vwload opens files in binary mode and performs automatic newline conversion, transparently handling text formats of various operating systems.)

Specifies a directory that will be used for relative paths in filenames. Default is /tmp, so specifying non-absolute paths without a WORK_DIR tells Vector to look for the files in /tmp.