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- 1 Version 4.0 -- 5/1/89 dbtxtimestamp
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- NAME: dbtxtimestamp
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- FUNCTION:
- Return the value of the text timestamp for a column in the
- current row.
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- SYNTAX:
- DBBINARY *dbtxtimestamp(dbproc, column)
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- DBPROCESS *dbproc;
- int column;
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- dbtxtimestamp Version 4.0 -- 5/1/89 2
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- COMMENTS:
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- o Every database column of type SYBTEXT or SYBIMAGE has an asso-
- ciated text timestamp, which marks the time of the column's
- last modification. The text timestamp is useful in conjunction
- with the dbwritetext() function, to ensure that two competing
- application users do not inadvertently wipe out each other's
- modifications to the same value in the database. It is
- returned to the DBPROCESS when a Transact-SQL SELECT is per-
- formed on a SYBTEXT or SYBIMAGE column.
- o The length of a non-NULL text timestamp is always DBTXTSLEN
- (currently defined as eight bytes).
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- o For an example that uses dbtxtimestamp(), see the dbwritetext()
- manual page.
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- 3 Version 4.0 -- 5/1/89 dbtxtimestamp
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- PARAMETERS:
- dbproc - A pointer to the DBPROCESS structure that provides the
- connection for a particular front-end/SQL Server process. It
- contains all the information that DB-Library uses to manage
- communications and data between the front end and SQL Server.
- column - The number of the column of interest. The first column
- in a table is number 1.
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- RETURNS:
- A DBBINARY pointer to the text timestamp for the column of
- interest. This pointer may be NULL.
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- SEE ALSO:
- dbtxptr, dbwritetext
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