Although not precisely defined, a control file can be said to have three sections. For more details on filename specification, see Specifying Filenames and Object Names. If the control file character set is different from the datafile character set, keep the following issue in mind. It defines the relationship between records in the datafile and tables in the database.
Input Character Conversion The default character set for all datafiles, if the CHARACTERSET parameter is not specified, is the session character set defined by the NLS_LANG parameter. See SQL*Loader DDL Support for LOBFILES and Secondary Data Files (SDFs). Record formats: Stream record format In stream record format, the newline character marks the end of a physical record. listenwhatisayoh 275.150 görüntüleme 9:16 Auto Download Rapidshare Megaupload w/ JDownloader - Ubuntu Linux 8.04 - Süre: 8:53. The syntax for a FILLER field is same as that for a column-based field, except that a FILLER field's name is followed by the keyword FILLER.
gotbletu 202.006 görüntüleme 8:53 JDownloader Extension: Infobar - Süre: 8:30. To load data into a table that is empty, you would use the INSERT parameter. Multibyte fixed-width character sets (for example, AL16UTF16) are not supported as the database character set. Updating Existing Rows The REPLACE method is a table replacement, not a replacement of individual rows.
If you omit end, the length of the continuation field is the length of the byte string or character string. Another way to avoid this problem is to ensure that the maximum column size is large enough, in bytes, to hold the converted value. Oturum aç Paylaş Daha fazla Bildir Videoyu bildirmeniz mi gerekiyor? Note that the optional third section of the control file is interpreted as data rather than as control file syntax; consequently, comments in this section are not supported.
Case Study 3: Loading a Delimited, Free-Format File provides an example. See Loading Data into Empty Tables. These parameters are described in greater detail in Chapter4. have a peek here A default delimiter (using the delimiter specification) for the fields that inherit a particular SDF specification (all member fields/attributes of the collection that contain the SDF specification, with exception of the
Direct Path A direct path load parses the input records according to the field specifications, converts the input field data to the column datatype, and builds a column array. The DDL is especially designed for drying of plastic raw materials which can only be processed satisfactorily at very low humidity rates. All other references are to logical records. Most control file field specifications claim a particular part of the logical record.
Then path names such as the following can be specified normally: INFILE 'topdir\mydir\myfile' Double backslashes are not needed. The field specifications tell SQL*Loader how to interpret the format of the datafile. The fastest way to load shift-sensitive character data is to use fixed-position fields without delimiters. OPTIONS Clause The OPTIONS clause allows you to specify runtime parameters in the control file, rather than on the command line.
Conceptually such objects are stored in entirety in a single column position in a row. The maximum size of a variable record is 2^32-1; specifying larger values will result in an error. The syntax for the fields_spec, termination_spec, and enclosure_spec clauses is as follows: fields_spec Text description of the illustration fields.gif termination_spec Text description of the illustration terminat.gif Note: Terminator strings can contain Can load data from disk, tape, or named pipe.
As with single-character delimiters, when you specify string delimiters, you should consider the character set of the datafile. You can specify a different number of discards for each datafile. See INFILE: Specifying Datafiles. Extracting Multiple Logical Records Some data storage and transfer media have fixed-length physical records.
The UTF-8 Unicode encoding is a variable-width multibyte encoding in which the character codes 0x00 through 0x7F have the same meaning as ASCII. Data Fields Once a logical record is formed, field setting on the logical record is done. Please see Loading Collections (Nested Tables and VARRAYs) for details on using SQL*Loader control file data definition language to load these collection types.
See Chapter 5 for more detail on the FILLER field syntax.
Instead, SQL*Loader forms records by scanning for the record terminator. The datatype of the field tells SQL*Loader how to treat the data in the datafile (for example, bind type). The following sections provide a brief introduction to some of the supported character encoding schemes. An array is an ordered set of built-in types or objects, called elements.
If the control file definition explicitly states that a field's starting position is beyond the end of the logical record, then SQL*Loader always defines the field as null. NULLIF or DEFAULTIF field conditions cannot be based on fields read from LOBFILEs. Field delimiters In previous versions of SQL*Loader, you could load fields that were delimited (terminated or enclosed) That method overrides the global table-loading method. Please try the request again.
You can override that default by specifying LENGTH with the LOBFILE or SDF specification. Identifying Data in the Control File with BEGINDATA If the data is included in the control file itself, then the INFILE clause is followed by an asterisk rather than a filename. Note that INDDN has been retained for situations in which compatibility with DB2 is required. Supported Object Types SQL*Loader supports loading of the following two object types: column-objects When a column of a table is of some object type, the objects in that column are referred
In control file syntax, comments extend from the two hyphens (--) that mark the beginning of the comment to the end of the line. Use the SQL language UPDATE statement with correlated subqueries. If hexadecimal strings are used with a datafile in the UTF-16 Unicode encoding, the byte order is different on a big endian versus a little endian system. For the SQL*Loader datatypes (CHAR, VARCHAR, VARCHARC, DATE, and EXTERNAL numerics), SQL*Loader supports lengths of character fields that are specified in either bytes (byte-length semantics) or characters (character-length semantics).
When you convert to a different operating system, you will probably need to modify these strings. The actual data is placed in the control file after the load configuration specifications.