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<title>Determine If An SQL Statement Is Complete</title>
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<a href="intro.html"><h2>SQLite C Interface</h2></a>
<h2>Determine If An SQL Statement Is Complete</h2>
</div>
<blockquote><pre>
int sqlite3_complete(const char *sql);
int sqlite3_complete16(const void *sql);
</pre></blockquote>
<p>
These routines are useful during command-line input to determine if the
currently entered text seems to form a complete SQL statement or
if additional input is needed before sending the text into
SQLite for parsing.  These routines return 1 if the input string
appears to be a complete SQL statement.  A statement is judged to be
complete if it ends with a semicolon token and is not a prefix of a
well-formed CREATE TRIGGER statement.  Semicolons that are embedded within
string literals or quoted identifier names or comments are not
independent tokens (they are part of the token in which they are
embedded) and thus do not count as a statement terminator.  Whitespace
and comments that follow the final semicolon are ignored.</p>

<p>These routines return 0 if the statement is incomplete.  If a
memory allocation fails, then SQLITE_NOMEM is returned.</p>

<p>These routines do not parse the SQL statements thus
will not detect syntactically incorrect SQL.</p>

<p>If SQLite has not been initialized using <a href="../c3ref/initialize.html">sqlite3_initialize()</a> prior
to invoking sqlite3_complete16() then sqlite3_initialize() is invoked
automatically by sqlite3_complete16().  If that initialization fails,
then the return value from sqlite3_complete16() will be non-zero
regardless of whether or not the input SQL is complete.</p>

<p>The input to <a href="../c3ref/complete.html">sqlite3_complete()</a> must be a zero-terminated
UTF-8 string.</p>

<p>The input to <a href="../c3ref/complete.html">sqlite3_complete16()</a> must be a zero-terminated
UTF-16 string in native byte order.
</p><p>See also lists of
  <a href="objlist.html">Objects</a>,
  <a href="constlist.html">Constants</a>, and
  <a href="funclist.html">Functions</a>.</p>