DB2 10.5 for Linux, UNIX, and Windows

collate_info - Collating information configuration parameter

This parameter determines the database's collating sequence. For a language-aware collation or locale-sensitive UCA collation, the first 256 bytes contain the string representation of the collation name (for example, "SYSTEM_819_US").

This parameter can only be displayed using the db2CfgGet API. It cannot be displayed through the command line processor.

Configuration type: Database
Parameter type: Informational

This parameter provides 260 bytes of database collating information. The first 256 bytes specify the database collating sequence, where byte "n" contains the sort weight of the code point whose underlying decimal representation is "n" in the code page of the database.

The last 4 bytes contain internal information about the type of the collating sequence. The last four bytes of the parameter is an integer. The integer is sensitive to the endian order of the platform. The possible values are:

0 - The sequence contains non-unique weights
1 - The sequence contains all unique weights
2 - The sequence is the identity sequence, for which strings are compared byte for byte.
3 - The sequence is NLSCHAR, used for sorting characters in a TIS620-1 (code page 874) Thai database.
4 - The sequence is IDENTITY_16BIT, which implements the "CESU-8 Compatibility Encoding Scheme for UTF-16: 8-bit" algorithm as specified in the Unicode Technical Report #26 available at the Unicode Technical Consortium website at http://www.unicode.org
X'8001' - The sequence is UCA400_NO, which implements the Unicode Collation Algorithm (UCA) based on the Unicode Standard version 4.0.0, with normalization implicitly set to ON.
X'8002' - The sequence is UCA400_LTH, which implements the Unicode Collation Algorithm (UCA) based on the Unicode Standard version 4.0.0, and sorts all Thai characters as per the Royal Thai Dictonary order.
X'8003' - The sequence is UCA400_LSK, which implements the Unicode Collation Algorithm (UCA) based on the Unicode Standard version 4.0.0, and sorts all Slovakian characters properly.

Note:

For a language-aware collation or locale-sensitive UCA collation, the first 256 bytes contain the string representation of the collation name.
Collations based on the Unicode Collation Algorithm of the Unicode Standard version 4.0.0 have been deprecated in Version 10.1 and might be removed in a future release.

If you use this internal type information, you need to consider byte reversal when retrieving information for a database on a different platform.

You can specify the collating sequence at database creation time.