LONG NVARCHAR data type

The LONG NVARCHAR data type stores Unicode character data of arbitrary length.

Syntax

LONG NVARCHAR

Characters are stored in UTF-8. Each character requires from one to four bytes. The maximum number of characters that can be stored in a LONG NVARCHAR is over 500 million and possibly over 2 billion, depending on the lengths of the characters stored.

When an embedded SQL client performs a DESCRIBE on a LONG NVARCHAR column, the data type returned is either DT_LONGVARCHAR or DT_LONGNVARCHAR, depending on whether the db_change_nchar_charset function has been called. See db_change_nchar_charset function.

For ODBC, a LONG NVARCHAR expression is described as SQL_WLONGVARCHAR.

Standards and compatibility

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