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Client APIs and toolsYou can use the HCL OneDB™ implementation of client APIs to develop applications for HCL OneDB™ database servers.
GLS User's GuideThese topics describe the Global Language Support (GLS) feature available in HCL® OneDB® products.The HCL OneDB™ GLS User's Guide describes the Global Language Support (GLS) feature available in HCL® OneDB® products.
SQL featuresThese topics explain how the GLS feature affects the HCL® OneDB® implementation of SQL.
Handle character dataThe GLS feature allows you to put non-ASCII characters (including multibyte characters) in the elements of an SQL statement.
Specify column substringsIn a query (or in any SQL statement containing an embedded SELECT statement), you can use bracket ( [ ] ) symbols to specify that only a subset of the data in a column of a character data type is to be retrieved. A column expression that includes brackets to signify a subset of the data in the column is known as a column substring.
Partial characters in column substringsA multibyte character might consist of 2, 3, or 4 bytes. A multibyte character that has lost one or more of its bytes so that the original intended meaning of the character is lost is called a partial character.

Partial characters in column substrings

A multibyte character might consist of 2, 3, or 4 bytes. A multibyte character that has lost one or more of its bytes so that the original intended meaning of the character is lost is called a partial character.

Unless prevented, a column substring might truncate a multibyte character or split it up in such a manner that it no longer retains the original sequence of bytes. A partial character might be generated when you use column subscript operators on columns that contain multibyte characters. Suppose that a user specifies the following column substring for the multi_col column where the value of the string in multi_col is A¹A²B¹B²C¹C²:

multi_col[2,5]

The user requests the following bytes in the query: A²B¹B²C¹. If the database server returned this column substring to the user, however, the first and third logical characters in the column would be truncated.