137 lines
5.0 KiB
HTML
137 lines
5.0 KiB
HTML
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<title>Interrupt A Long-Running Query</title>
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<a href="intro.html"><h2>SQLite C Interface</h2></a>
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<h2>Interrupt A Long-Running Query</h2>
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</div>
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<blockquote><pre>
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void sqlite3_interrupt(sqlite3*);
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</pre></blockquote>
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<p>
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This function causes any pending database operation to abort and
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return at its earliest opportunity. This routine is typically
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called in response to a user action such as pressing "Cancel"
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or Ctrl-C where the user wants a long query operation to halt
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immediately.</p>
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<p>It is safe to call this routine from a thread different from the
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thread that is currently running the database operation. But it
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is not safe to call this routine with a <a href="../c3ref/sqlite3.html">database connection</a> that
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is closed or might close before sqlite3_interrupt() returns.</p>
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<p>If an SQL operation is very nearly finished at the time when
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sqlite3_interrupt() is called, then it might not have an opportunity
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to be interrupted and might continue to completion.</p>
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<p>An SQL operation that is interrupted will return <a href="../rescode.html#interrupt">SQLITE_INTERRUPT</a>.
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If the interrupted SQL operation is an INSERT, UPDATE, or DELETE
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that is inside an explicit transaction, then the entire transaction
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will be rolled back automatically.</p>
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<p>The sqlite3_interrupt(D) call is in effect until all currently running
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SQL statements on <a href="../c3ref/sqlite3.html">database connection</a> D complete. Any new SQL statements
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that are started after the sqlite3_interrupt() call and before the
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running statement count reaches zero are interrupted as if they had been
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running prior to the sqlite3_interrupt() call. New SQL statements
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that are started after the running statement count reaches zero are
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not effected by the sqlite3_interrupt().
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A call to sqlite3_interrupt(D) that occurs when there are no running
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SQL statements is a no-op and has no effect on SQL statements
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that are started after the sqlite3_interrupt() call returns.
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</p><p>See also lists of
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<a href="objlist.html">Objects</a>,
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<a href="constlist.html">Constants</a>, and
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<a href="funclist.html">Functions</a>.</p>
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