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<title>Berkeley DB: DB->get_type</title>
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<h1>DB->get_type</h1>
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DB->get_type(DB *db, DBTYPE *type);
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<p>The DB->get_type method
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stores the type of the underlying access method (and file format) into
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the memory referenced by <b>type</b>.
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The returned value is one of DB_BTREE, DB_HASH,
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DB_RECNO, or DB_QUEUE. This value may be used to
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determine the type of the database after a return from <a href="../api_c/db_open.html">DB->open</a>
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with the <b>type</b> argument set to DB_UNKNOWN.
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<p>The DB->get_type interface may not be called before the <a href="../api_c/db_open.html">DB->open</a>
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interface has been called.
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<p>The DB->get_type 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 before <a href="../api_c/db_open.html">DB->open</a> was called.
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<p>The DB->get_type 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->get_type 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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