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<div class="title">ex_schema.c</div> </div>
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<div class="contents">
<p>Shows how to create column-oriented data and access individual columns.</p>
<div class="fragment"><div class="line"><span class="comment">/*-</span></div>
<div class="line"><span class="comment"> * Public Domain 2008-2013 WiredTiger, Inc.</span></div>
<div class="line"><span class="comment"> *</span></div>
<div class="line"><span class="comment"> * This is free and unencumbered software released into the public domain.</span></div>
<div class="line"><span class="comment"> *</span></div>
<div class="line"><span class="comment"> * Anyone is free to copy, modify, publish, use, compile, sell, or</span></div>
<div class="line"><span class="comment"> * distribute this software, either in source code form or as a compiled</span></div>
<div class="line"><span class="comment"> * binary, for any purpose, commercial or non-commercial, and by any</span></div>
<div class="line"><span class="comment"> * means.</span></div>
<div class="line"><span class="comment"> *</span></div>
<div class="line"><span class="comment"> * In jurisdictions that recognize copyright laws, the author or authors</span></div>
<div class="line"><span class="comment"> * of this software dedicate any and all copyright interest in the</span></div>
<div class="line"><span class="comment"> * software to the public domain. We make this dedication for the benefit</span></div>
<div class="line"><span class="comment"> * of the public at large and to the detriment of our heirs and</span></div>
<div class="line"><span class="comment"> * successors. We intend this dedication to be an overt act of</span></div>
<div class="line"><span class="comment"> * relinquishment in perpetuity of all present and future rights to this</span></div>
<div class="line"><span class="comment"> * software under copyright law.</span></div>
<div class="line"><span class="comment"> *</span></div>
<div class="line"><span class="comment"> * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,</span></div>
<div class="line"><span class="comment"> * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF</span></div>
<div class="line"><span class="comment"> * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.</span></div>
<div class="line"><span class="comment"> * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR</span></div>
<div class="line"><span class="comment"> * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,</span></div>
<div class="line"><span class="comment"> * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR</span></div>
<div class="line"><span class="comment"> * OTHER DEALINGS IN THE SOFTWARE.</span></div>
<div class="line"><span class="comment"> *</span></div>
<div class="line"><span class="comment"> * ex_schema.c</span></div>
<div class="line"><span class="comment"> * This is an example application demonstrating how to create and access</span></div>
<div class="line"><span class="comment"> * tables using a schema.</span></div>
<div class="line"><span class="comment"> */</span></div>
<div class="line"></div>
<div class="line"><span class="preprocessor">#include <stdio.h></span></div>
<div class="line"><span class="preprocessor">#include <string.h></span></div>
<div class="line"></div>
<div class="line"><span class="preprocessor">#include <inttypes.h></span></div>
<div class="line"><span class="preprocessor">#include <wiredtiger.h></span></div>
<div class="line"></div>
<div class="line"><span class="keyword">const</span> <span class="keywordtype">char</span> *home = NULL;</div>
<div class="line"></div>
<div class="line"><span class="comment">/* The C struct for the data we are storing in a WiredTiger table. */</span></div>
<div class="line"><span class="keyword">typedef</span> <span class="keyword">struct </span>{</div>
<div class="line"> <span class="keywordtype">char</span> country[5];</div>
<div class="line"> uint16_t year;</div>
<div class="line"> uint64_t population;</div>
<div class="line">} POP_RECORD;</div>
<div class="line"></div>
<div class="line">POP_RECORD pop_data[] = {</div>
<div class="line"> { <span class="stringliteral">"AU"</span>, 1900, 4000000 },</div>
<div class="line"> { <span class="stringliteral">"AU"</span>, 2000, 19053186 },</div>
<div class="line"> { <span class="stringliteral">"CAN"</span>, 1900, 5500000 },</div>
<div class="line"> { <span class="stringliteral">"CAN"</span>, 2000, 31099561 },</div>
<div class="line"> { <span class="stringliteral">"UK"</span>, 1900, 369000000 },</div>
<div class="line"> { <span class="stringliteral">"UK"</span>, 2000, 59522468 },</div>
<div class="line"> { <span class="stringliteral">"USA"</span>, 1900, 76212168 },</div>
<div class="line"> { <span class="stringliteral">"USA"</span>, 2000, 301279593 },</div>
<div class="line"> { <span class="stringliteral">""</span>, 0, 0 }</div>
<div class="line">};</div>
<div class="line"><span class="keywordtype">int</span></div>
<div class="line">main(<span class="keywordtype">void</span>)</div>
<div class="line">{</div>
<div class="line"> POP_RECORD *p;</div>
<div class="line"> <a name="_a0"></a><a class="code" href="struct_w_t___c_o_n_n_e_c_t_i_o_n.html" title="A connection to a WiredTiger database.">WT_CONNECTION</a> *conn;</div>
<div class="line"> <a name="_a1"></a><a class="code" href="struct_w_t___c_u_r_s_o_r.html" title="A WT_CURSOR handle is the interface to a cursor.">WT_CURSOR</a> *cursor;</div>
<div class="line"> <a name="_a2"></a><a class="code" href="struct_w_t___s_e_s_s_i_o_n.html" title="All data operations are performed in the context of a WT_SESSION.">WT_SESSION</a> *session;</div>
<div class="line"> <span class="keyword">const</span> <span class="keywordtype">char</span> *country;</div>
<div class="line"> uint64_t recno, population;</div>
<div class="line"> uint16_t year;</div>
<div class="line"> <span class="keywordtype">int</span> ret;</div>
<div class="line"></div>
<div class="line"> ret = <a name="a3"></a><a class="code" href="group__wt.html#ga9e6adae3fc6964ef837a62795c7840ed" title="Open a connection to a database.">wiredtiger_open</a>(home, NULL, <span class="stringliteral">"create"</span>, &conn);</div>
<div class="line"> <span class="keywordflow">if</span> (ret != 0)</div>
<div class="line"> fprintf(stderr, <span class="stringliteral">"Error connecting to %s: %s\n"</span>,</div>
<div class="line"> home, <a name="a4"></a><a class="code" href="group__wt.html#gac95e70a24d09cf6928398512990e1474" title="Return information about an error as a string; wiredtiger_strerror is a superset of the ISO C99/POSIX...">wiredtiger_strerror</a>(ret));</div>
<div class="line"> <span class="comment">/* Note: error checking omitted for clarity. */</span></div>
<div class="line"></div>
<div class="line"> ret = conn-><a name="a5"></a><a class="code" href="struct_w_t___c_o_n_n_e_c_t_i_o_n.html#afc75c44ff4497627c59d9b6aaa64c9d8" title="Open a session.">open_session</a>(conn, NULL, NULL, &session);</div>
<div class="line"></div>
<div class="line"> <span class="comment">/*</span></div>
<div class="line"><span class="comment"> * Create the population table.</span></div>
<div class="line"><span class="comment"> * Keys are record numbers, the format for values is (5-byte string,</span></div>
<div class="line"><span class="comment"> * uint16_t, uint64_t).</span></div>
<div class="line"><span class="comment"> * See ::wiredtiger_struct_pack for details of the format strings.</span></div>
<div class="line"><span class="comment"> */</span></div>
<div class="line"> ret = session-><a name="a6"></a><a class="code" href="struct_w_t___s_e_s_s_i_o_n.html#a358ca4141d59c345f401c58501276bbb" title="Create a table, column group, index or file.">create</a>(session, <span class="stringliteral">"table:poptable"</span>,</div>
<div class="line"> <span class="stringliteral">"key_format=r,"</span></div>
<div class="line"> <span class="stringliteral">"value_format=5sHQ,"</span></div>
<div class="line"> <span class="stringliteral">"columns=(id,country,year,population),"</span></div>
<div class="line"> <span class="stringliteral">"colgroups=(main,population)"</span>);</div>
<div class="line"></div>
<div class="line"> <span class="comment">/*</span></div>
<div class="line"><span class="comment"> * Create two column groups: a primary column group with the country</span></div>
<div class="line"><span class="comment"> * code, year and population (named "main"), and a population column</span></div>
<div class="line"><span class="comment"> * group with the population by itself (named "population").</span></div>
<div class="line"><span class="comment"> */</span></div>
<div class="line"> ret = session-><a class="code" href="struct_w_t___s_e_s_s_i_o_n.html#a358ca4141d59c345f401c58501276bbb" title="Create a table, column group, index or file.">create</a>(session,</div>
<div class="line"> <span class="stringliteral">"colgroup:poptable:main"</span>, <span class="stringliteral">"columns=(country,year,population)"</span>);</div>
<div class="line"> ret = session-><a class="code" href="struct_w_t___s_e_s_s_i_o_n.html#a358ca4141d59c345f401c58501276bbb" title="Create a table, column group, index or file.">create</a>(session,</div>
<div class="line"> <span class="stringliteral">"colgroup:poptable:population"</span>, <span class="stringliteral">"columns=(population)"</span>);</div>
<div class="line"> <span class="comment">/* Create an index with a simple key. */</span></div>
<div class="line"> ret = session-><a class="code" href="struct_w_t___s_e_s_s_i_o_n.html#a358ca4141d59c345f401c58501276bbb" title="Create a table, column group, index or file.">create</a>(session,</div>
<div class="line"> <span class="stringliteral">"index:poptable:country"</span>, <span class="stringliteral">"columns=(country)"</span>);</div>
<div class="line"> <span class="comment">/* Create an index with a composite key (country,year). */</span></div>
<div class="line"> ret = session-><a class="code" href="struct_w_t___s_e_s_s_i_o_n.html#a358ca4141d59c345f401c58501276bbb" title="Create a table, column group, index or file.">create</a>(session,</div>
<div class="line"> <span class="stringliteral">"index:poptable:country_plus_year"</span>, <span class="stringliteral">"columns=(country,year)"</span>);</div>
<div class="line"> <span class="comment">/* Insert the records into the table. */</span></div>
<div class="line"> ret = session-><a name="a7"></a><a class="code" href="struct_w_t___s_e_s_s_i_o_n.html#afb5b4a69c2c5cafe411b2b04fdc1c75d" title="Open a new cursor on a data source or duplicate an existing cursor.">open_cursor</a>(</div>
<div class="line"> session, <span class="stringliteral">"table:poptable"</span>, NULL, <span class="stringliteral">"append"</span>, &cursor);</div>
<div class="line"> <span class="keywordflow">for</span> (p = pop_data; p->year != 0; p++) {</div>
<div class="line"> cursor-><a name="a8"></a><a class="code" href="struct_w_t___c_u_r_s_o_r.html#a27f7cbd0cd3e561f6a145704813ad64c" title="Set the value for the next operation.">set_value</a>(cursor, p->country, p->year, p->population);</div>
<div class="line"> ret = cursor-><a name="a9"></a><a class="code" href="struct_w_t___c_u_r_s_o_r.html#aac90d9fbcc031570f924db55f8a1cee3" title="Insert a record, and optionally overwrite an existing record.">insert</a>(cursor);</div>
<div class="line"> }</div>
<div class="line"> ret = cursor-><a name="a10"></a><a class="code" href="struct_w_t___c_u_r_s_o_r.html#aeea071f192cab12245a50fbe71c3460b" title="Close the cursor.">close</a>(cursor);</div>
<div class="line"></div>
<div class="line"> <span class="comment">/* List the records in the table. */</span></div>
<div class="line"> ret = session-><a class="code" href="struct_w_t___s_e_s_s_i_o_n.html#afb5b4a69c2c5cafe411b2b04fdc1c75d" title="Open a new cursor on a data source or duplicate an existing cursor.">open_cursor</a>(session,</div>
<div class="line"> <span class="stringliteral">"table:poptable"</span>, NULL, NULL, &cursor);</div>
<div class="line"> <span class="keywordflow">while</span> ((ret = cursor-><a name="a11"></a><a class="code" href="struct_w_t___c_u_r_s_o_r.html#a0503f16bd8f3d05aa3552f229b3a8e1b" title="Return the next record.">next</a>(cursor)) == 0) {</div>
<div class="line"> ret = cursor-><a name="a12"></a><a class="code" href="struct_w_t___c_u_r_s_o_r.html#af19f6f9d9c7fc248ab38879032620b2f" title="Get the key for the current record.">get_key</a>(cursor, &recno);</div>
<div class="line"> ret = cursor-><a name="a13"></a><a class="code" href="struct_w_t___c_u_r_s_o_r.html#af85364a5af50b95bbc46c82e72f75c01" title="Get the value for the current record.">get_value</a>(cursor, &country, &year, &population);</div>
<div class="line"> printf(<span class="stringliteral">"ID %"</span> PRIu64, recno);</div>
<div class="line"> printf(<span class="stringliteral">": country %s, year %u, population %"</span> PRIu64 <span class="stringliteral">"\n"</span>,</div>
<div class="line"> country, year, population);</div>
<div class="line"> }</div>
<div class="line"> ret = cursor-><a class="code" href="struct_w_t___c_u_r_s_o_r.html#aeea071f192cab12245a50fbe71c3460b" title="Close the cursor.">close</a>(cursor);</div>
<div class="line"></div>
<div class="line"> <span class="comment">/*</span></div>
<div class="line"><span class="comment"> * Open a cursor on the main column group, and return the information</span></div>
<div class="line"><span class="comment"> * for a particular country.</span></div>
<div class="line"><span class="comment"> */</span></div>
<div class="line"> ret = session-><a class="code" href="struct_w_t___s_e_s_s_i_o_n.html#afb5b4a69c2c5cafe411b2b04fdc1c75d" title="Open a new cursor on a data source or duplicate an existing cursor.">open_cursor</a>(</div>
<div class="line"> session, <span class="stringliteral">"colgroup:poptable:main"</span>, NULL, NULL, &cursor);</div>
<div class="line"> cursor-><a name="a14"></a><a class="code" href="struct_w_t___c_u_r_s_o_r.html#ad1088d719df40babc1f57d086691ebdc" title="Set the key for the next operation.">set_key</a>(cursor, 2);</div>
<div class="line"> <span class="keywordflow">if</span> ((ret = cursor-><a name="a15"></a><a class="code" href="struct_w_t___c_u_r_s_o_r.html#a7e25b2ced2cf3ec68bd5429bf921c79f" title="Move to the record matching the key.">search</a>(cursor)) == 0) {</div>
<div class="line"> ret = cursor-><a class="code" href="struct_w_t___c_u_r_s_o_r.html#af85364a5af50b95bbc46c82e72f75c01" title="Get the value for the current record.">get_value</a>(cursor, &country, &year, &population);</div>
<div class="line"> printf(<span class="stringliteral">"ID 2: country %s, year %u, population %"</span> PRIu64 <span class="stringliteral">"\n"</span>,</div>
<div class="line"> country, year, population);</div>
<div class="line"> }</div>
<div class="line"> ret = cursor-><a class="code" href="struct_w_t___c_u_r_s_o_r.html#aeea071f192cab12245a50fbe71c3460b" title="Close the cursor.">close</a>(cursor);</div>
<div class="line"></div>
<div class="line"> <span class="comment">/*</span></div>
<div class="line"><span class="comment"> * Open a cursor on the population column group, and return the</span></div>
<div class="line"><span class="comment"> * population of a particular country.</span></div>
<div class="line"><span class="comment"> */</span></div>
<div class="line"> ret = session-><a class="code" href="struct_w_t___s_e_s_s_i_o_n.html#afb5b4a69c2c5cafe411b2b04fdc1c75d" title="Open a new cursor on a data source or duplicate an existing cursor.">open_cursor</a>(session,</div>
<div class="line"> <span class="stringliteral">"colgroup:poptable:population"</span>, NULL, NULL, &cursor);</div>
<div class="line"> cursor-><a class="code" href="struct_w_t___c_u_r_s_o_r.html#ad1088d719df40babc1f57d086691ebdc" title="Set the key for the next operation.">set_key</a>(cursor, 2);</div>
<div class="line"> <span class="keywordflow">if</span> ((ret = cursor-><a class="code" href="struct_w_t___c_u_r_s_o_r.html#a7e25b2ced2cf3ec68bd5429bf921c79f" title="Move to the record matching the key.">search</a>(cursor)) == 0) {</div>
<div class="line"> ret = cursor-><a class="code" href="struct_w_t___c_u_r_s_o_r.html#af85364a5af50b95bbc46c82e72f75c01" title="Get the value for the current record.">get_value</a>(cursor, &population);</div>
<div class="line"> printf(<span class="stringliteral">"ID 2: population %"</span> PRIu64 <span class="stringliteral">"\n"</span>, population);</div>
<div class="line"> }</div>
<div class="line"> ret = cursor-><a class="code" href="struct_w_t___c_u_r_s_o_r.html#aeea071f192cab12245a50fbe71c3460b" title="Close the cursor.">close</a>(cursor);</div>
<div class="line"></div>
<div class="line"> <span class="comment">/* Search in a simple index. */</span></div>
<div class="line"> ret = session-><a class="code" href="struct_w_t___s_e_s_s_i_o_n.html#afb5b4a69c2c5cafe411b2b04fdc1c75d" title="Open a new cursor on a data source or duplicate an existing cursor.">open_cursor</a>(session,</div>
<div class="line"> <span class="stringliteral">"index:poptable:country"</span>, NULL, NULL, &cursor);</div>
<div class="line"> cursor-><a class="code" href="struct_w_t___c_u_r_s_o_r.html#ad1088d719df40babc1f57d086691ebdc" title="Set the key for the next operation.">set_key</a>(cursor, <span class="stringliteral">"AU\0\0\0"</span>);</div>
<div class="line"> ret = cursor-><a class="code" href="struct_w_t___c_u_r_s_o_r.html#a7e25b2ced2cf3ec68bd5429bf921c79f" title="Move to the record matching the key.">search</a>(cursor);</div>
<div class="line"> ret = cursor-><a class="code" href="struct_w_t___c_u_r_s_o_r.html#af85364a5af50b95bbc46c82e72f75c01" title="Get the value for the current record.">get_value</a>(cursor, &country, &year, &population);</div>
<div class="line"> printf(<span class="stringliteral">"AU: country %s, year %u, population %"</span> PRIu64 <span class="stringliteral">"\n"</span>,</div>
<div class="line"> country, (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>)year, population);</div>
<div class="line"> ret = cursor-><a class="code" href="struct_w_t___c_u_r_s_o_r.html#aeea071f192cab12245a50fbe71c3460b" title="Close the cursor.">close</a>(cursor);</div>
<div class="line"></div>
<div class="line"> <span class="comment">/* Search in a composite index. */</span></div>
<div class="line"> ret = session-><a class="code" href="struct_w_t___s_e_s_s_i_o_n.html#afb5b4a69c2c5cafe411b2b04fdc1c75d" title="Open a new cursor on a data source or duplicate an existing cursor.">open_cursor</a>(session,</div>
<div class="line"> <span class="stringliteral">"index:poptable:country_plus_year"</span>, NULL, NULL, &cursor);</div>
<div class="line"> cursor-><a class="code" href="struct_w_t___c_u_r_s_o_r.html#ad1088d719df40babc1f57d086691ebdc" title="Set the key for the next operation.">set_key</a>(cursor, <span class="stringliteral">"USA\0\0"</span>, (uint16_t)1900);</div>
<div class="line"> ret = cursor-><a class="code" href="struct_w_t___c_u_r_s_o_r.html#a7e25b2ced2cf3ec68bd5429bf921c79f" title="Move to the record matching the key.">search</a>(cursor);</div>
<div class="line"> ret = cursor-><a class="code" href="struct_w_t___c_u_r_s_o_r.html#af85364a5af50b95bbc46c82e72f75c01" title="Get the value for the current record.">get_value</a>(cursor, &country, &year, &population);</div>
<div class="line"> printf(<span class="stringliteral">"US 1900: country %s, year %u, population %"</span> PRIu64 <span class="stringliteral">"\n"</span>,</div>
<div class="line"> country, (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>)year, population);</div>
<div class="line"> ret = cursor-><a class="code" href="struct_w_t___c_u_r_s_o_r.html#aeea071f192cab12245a50fbe71c3460b" title="Close the cursor.">close</a>(cursor);</div>
<div class="line"></div>
<div class="line"> <span class="comment">/* Return the table's record number key using an index. */</span></div>
<div class="line"> ret = session-><a class="code" href="struct_w_t___s_e_s_s_i_o_n.html#afb5b4a69c2c5cafe411b2b04fdc1c75d" title="Open a new cursor on a data source or duplicate an existing cursor.">open_cursor</a>(session,</div>
<div class="line"> <span class="stringliteral">"index:poptable:country_plus_year(id)"</span>, NULL, NULL, &cursor);</div>
<div class="line"> <span class="keywordflow">while</span> ((ret = cursor-><a class="code" href="struct_w_t___c_u_r_s_o_r.html#a0503f16bd8f3d05aa3552f229b3a8e1b" title="Return the next record.">next</a>(cursor)) == 0) {</div>
<div class="line"> ret = cursor-><a class="code" href="struct_w_t___c_u_r_s_o_r.html#af19f6f9d9c7fc248ab38879032620b2f" title="Get the key for the current record.">get_key</a>(cursor, &country, &year);</div>
<div class="line"> ret = cursor-><a class="code" href="struct_w_t___c_u_r_s_o_r.html#af85364a5af50b95bbc46c82e72f75c01" title="Get the value for the current record.">get_value</a>(cursor, &recno);</div>
<div class="line"> printf(</div>
<div class="line"> <span class="stringliteral">"row ID %"</span> PRIu64 <span class="stringliteral">": country %s, year %u\n"</span>,</div>
<div class="line"> recno, country, year);</div>
<div class="line"> }</div>
<div class="line"> ret = cursor-><a class="code" href="struct_w_t___c_u_r_s_o_r.html#aeea071f192cab12245a50fbe71c3460b" title="Close the cursor.">close</a>(cursor);</div>
<div class="line"></div>
<div class="line"> <span class="comment">/* Return just the population column using an index. */</span></div>
<div class="line"> ret = session-><a class="code" href="struct_w_t___s_e_s_s_i_o_n.html#afb5b4a69c2c5cafe411b2b04fdc1c75d" title="Open a new cursor on a data source or duplicate an existing cursor.">open_cursor</a>(session,</div>
<div class="line"> <span class="stringliteral">"index:poptable:country_plus_year(population)"</span>,</div>
<div class="line"> NULL, NULL, &cursor);</div>
<div class="line"> <span class="keywordflow">while</span> ((ret = cursor-><a class="code" href="struct_w_t___c_u_r_s_o_r.html#a0503f16bd8f3d05aa3552f229b3a8e1b" title="Return the next record.">next</a>(cursor)) == 0) {</div>
<div class="line"> ret = cursor-><a class="code" href="struct_w_t___c_u_r_s_o_r.html#af19f6f9d9c7fc248ab38879032620b2f" title="Get the key for the current record.">get_key</a>(cursor, &country, &year);</div>
<div class="line"> ret = cursor-><a class="code" href="struct_w_t___c_u_r_s_o_r.html#af85364a5af50b95bbc46c82e72f75c01" title="Get the value for the current record.">get_value</a>(cursor, &population);</div>
<div class="line"> printf(<span class="stringliteral">"population %"</span> PRIu64 <span class="stringliteral">": country %s, year %u\n"</span>,</div>
<div class="line"> population, country, year);</div>
<div class="line"> }</div>
<div class="line"> ret = cursor-><a class="code" href="struct_w_t___c_u_r_s_o_r.html#aeea071f192cab12245a50fbe71c3460b" title="Close the cursor.">close</a>(cursor);</div>
<div class="line"></div>
<div class="line"> <span class="comment">/*</span></div>
<div class="line"><span class="comment"> * Avoid accessing any other column groups when using an index: supply</span></div>
<div class="line"><span class="comment"> * an empty list of value columns.</span></div>
<div class="line"><span class="comment"> */</span></div>
<div class="line"> ret = session-><a class="code" href="struct_w_t___s_e_s_s_i_o_n.html#afb5b4a69c2c5cafe411b2b04fdc1c75d" title="Open a new cursor on a data source or duplicate an existing cursor.">open_cursor</a>(session,</div>
<div class="line"> <span class="stringliteral">"index:poptable:country_plus_year()"</span>, NULL, NULL, &cursor);</div>
<div class="line"> <span class="keywordflow">while</span> ((ret = cursor-><a class="code" href="struct_w_t___c_u_r_s_o_r.html#a0503f16bd8f3d05aa3552f229b3a8e1b" title="Return the next record.">next</a>(cursor)) == 0) {</div>
<div class="line"> ret = cursor-><a class="code" href="struct_w_t___c_u_r_s_o_r.html#af19f6f9d9c7fc248ab38879032620b2f" title="Get the key for the current record.">get_key</a>(cursor, &country, &year);</div>
<div class="line"> printf(<span class="stringliteral">"country %s, year %u\n"</span>, country, year);</div>
<div class="line"> }</div>
<div class="line"> ret = cursor-><a class="code" href="struct_w_t___c_u_r_s_o_r.html#aeea071f192cab12245a50fbe71c3460b" title="Close the cursor.">close</a>(cursor);</div>
<div class="line"> ret = conn-><a name="a16"></a><a class="code" href="struct_w_t___c_o_n_n_e_c_t_i_o_n.html#af535c517df851eeac8ebf3594d40b545" title="Close a connection.">close</a>(conn, NULL);</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">return</span> (ret);</div>
<div class="line">}</div>
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