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<a href="intro.html"><h2>SQLite C Interface</h2></a><h2>One-Step Query Execution Interface</h2><blockquote><pre>int sqlite3_exec(
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sqlite3*, /* An open database */
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const char *sql, /* SQL to be evaluated */
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int (*callback)(void*,int,char**,char**), /* Callback function */
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void *, /* 1st argument to callback */
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char **errmsg /* Error msg written here */
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</pre></blockquote><p>
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The sqlite3_exec() interface is a convenience wrapper around
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<a href="../c3ref/prepare.html">sqlite3_prepare_v2()</a>, <a href="../c3ref/step.html">sqlite3_step()</a>, and <a href="../c3ref/finalize.html">sqlite3_finalize()</a>,
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that allows an application to run multiple statements of SQL
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without having to use a lot of C code.</p>
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<p>The sqlite3_exec() interface runs zero or more UTF-8 encoded,
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semicolon-separate SQL statements passed into its 2nd argument,
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in the context of the <a href="../c3ref/sqlite3.html">database connection</a> passed in as its 1st
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argument. If the callback function of the 3rd argument to
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sqlite3_exec() is not NULL, then it is invoked for each result row
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coming out of the evaluated SQL statements. The 4th argument to
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sqlite3_exec() is relayed through to the 1st argument of each
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callback invocation. If the callback pointer to sqlite3_exec()
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is NULL, then no callback is ever invoked and result rows are
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<p>If an error occurs while evaluating the SQL statements passed into
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sqlite3_exec(), then execution of the current statement stops and
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subsequent statements are skipped. If the 5th parameter to sqlite3_exec()
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is not NULL then any error message is written into memory obtained
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from <a href="../c3ref/free.html">sqlite3_malloc()</a> and passed back through the 5th parameter.
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To avoid memory leaks, the application should invoke <a href="../c3ref/free.html">sqlite3_free()</a>
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on error message strings returned through the 5th parameter of
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of sqlite3_exec() after the error message string is no longer needed.
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If the 5th parameter to sqlite3_exec() is not NULL and no errors
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occur, then sqlite3_exec() sets the pointer in its 5th parameter to
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NULL before returning.</p>
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<p>If an sqlite3_exec() callback returns non-zero, the sqlite3_exec()
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routine returns SQLITE_ABORT without invoking the callback again and
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without running any subsequent SQL statements.</p>
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<p>The 2nd argument to the sqlite3_exec() callback function is the
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number of columns in the result. The 3rd argument to the sqlite3_exec()
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callback is an array of pointers to strings obtained as if from
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<a href="../c3ref/column_blob.html">sqlite3_column_text()</a>, one for each column. If an element of a
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result row is NULL then the corresponding string pointer for the
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sqlite3_exec() callback is a NULL pointer. The 4th argument to the
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sqlite3_exec() callback is an array of pointers to strings where each
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entry represents the name of corresponding result column as obtained
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from <a href="../c3ref/column_name.html">sqlite3_column_name()</a>.</p>
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<p>If the 2nd parameter to sqlite3_exec() is a NULL pointer, a pointer
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to an empty string, or a pointer that contains only whitespace and/or
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SQL comments, then no SQL statements are evaluated and the database
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<li> The application must insure that the 1st parameter to sqlite3_exec()
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is a valid and open <a href="../c3ref/sqlite3.html">database connection</a>.
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<li> The application must not close <a href="../c3ref/sqlite3.html">database connection</a> specified by
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the 1st parameter to sqlite3_exec() while sqlite3_exec() is running.
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<li> The application must not modify the SQL statement text passed into
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the 2nd parameter of sqlite3_exec() while sqlite3_exec() is running.
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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>