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< th colspan = "3" align = "center" > Dbc::cmp()< / th >
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The Dbc Handle
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< h2 class = "title" style = "clear: both" > < a id = "dbccmp" > < / a > Dbc::cmp()< / h2 >
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< pre class = "programlisting" > #include < db_cxx.h>
int
Dbc::cmp(Dbc *other_cursor, int *result, u_int32_t flags);< / pre >
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The < code class = "methodname" > Dbc::cmp()< / code > method compares two cursors for equality. Two cursors are equal if and only if they are positioned on the same item in the same database.
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The < code class = "methodname" > Dbc::cmp()< / code > < span >
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method either returns a non-zero error value or throws an
exception that encapsulates a non-zero error value on
failure, and returns 0 on success.
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< h3 class = "title" > < a id = "id3584840" > < / a > Parameters< / h3 >
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< h4 class = "title" > < a id = "id3584830" > < / a > other_cursor< / h4 >
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The < span class = "bold" > < strong > other_cursor< / strong > < / span > parameter references
another cursor handle that will be used as the comparator.
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< h4 class = "title" > < a id = "id3584745" > < / a > result< / h4 >
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If the call is successful and both cursors are positioned on the same item, result is set to zero. If the call is successful but the cursors are not positioned on the same item, result is set to a non-zero value. If the call is unsuccessful, the value of result should be ignored.
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< h4 class = "title" > < a id = "id3584632" > < / a > flags< / h4 >
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The < span class = "bold" > < strong > flags< / strong > < / span > parameter is currently
unused, and must be set to 0.
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< h3 class = "title" > < a id = "id3584259" > < / a > Errors< / h3 >
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The < code class = "methodname" > Dbc::cmp()< / code > < span >
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method may fail and throw a < a class = "link" href = "dbexception.html" title = "Chapter > DbException< / a >
exception, encapsulating one of the following non-zero errors, or return one
of the following non-zero errors:
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If either of the cursors are already closed.
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If the cursors have been opened against different databases.
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If either of the cursors have not been positioned.
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If the other_dbc parameter is NULL.
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If the result parameter is NULL.
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< a class = "xref" href = "dbc.html#dbclist" title = "Database Cursors and Related Methods" > Database Cursors and Related Methods< / a >
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