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<title>Berkeley DB: DB->set_re_len</title>
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<h1>DB->set_re_len</h1>
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DB->set_re_len(DB *db, u_int32_t re_len);
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<p>For the Queue access method, specify that the records are of length
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<b>re_len</b>. For the Queue access method, the record length must be
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enough smaller than the database's page size that at least one record
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plus the database page's metadata information can fit on each database
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<p>For the Recno access method, specify that the records are fixed-length,
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not byte-delimited, and are of length <b>re_len</b>.
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<p>Any records added to the database that are less than <b>re_len</b> bytes
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long are automatically padded (see <a href="../api_c/db_set_re_pad.html">DB->set_re_pad</a> for more
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<p>Any attempt to insert records into the database that are greater than
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<b>re_len</b> bytes long will cause the call to fail immediately and
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<p>The DB->set_re_len method configures a database, not only operations performed
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using the specified <a href="../api_c/db_class.html">DB</a> handle.
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<p>The DB->set_re_len interface may not be called after the <a href="../api_c/db_open.html">DB->open</a>
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If the database already exists when
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<a href="../api_c/db_open.html">DB->open</a> is called, the information specified to DB->set_re_len will
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<p>The DB->set_re_len method returns a non-zero error value on failure and 0 on success.
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<p>The DB->set_re_len method may fail and return a non-zero error for the following conditions:
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<p><dt>EINVAL<dd>An invalid flag value or parameter was specified.
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<p>Called after <a href="../api_c/db_open.html">DB->open</a> was called.
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<p>The DB->set_re_len method may fail and return a non-zero error for errors specified for other Berkeley DB and C library or system functions.
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If a catastrophic error has occurred, the DB->set_re_len method may fail and
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return <a href="../ref/program/errorret.html#DB_RUNRECOVERY">DB_RUNRECOVERY</a>,
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in which case all subsequent Berkeley DB calls will fail in the same way.
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<a href="../api_c/db_class.html">DB</a>
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