cpp-client-api/classkudu_1_1client_1_1KuduSchemaBuilder.html - kudu-site - Git at Google

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 <p>Builder API for constructing a <a class="el" href="classkudu_1_1client_1_1KuduSchema.html" title="A representation of a table&#39;s schema. ">KuduSchema</a> object.
  <a href="classkudu_1_1client_1_1KuduSchemaBuilder.html#details">More...</a></p>

 <p><code>#include &lt;<a class="el" href="schema_8h_source.html">schema.h</a>&gt;</code></p>
 <table class="memberdecls">
 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
 Public Member Functions</h2></td></tr>
 <tr class="memitem:a0fdf28d49cc05ba4f3182f7398ddf600"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classkudu_1_1client_1_1KuduColumnSpec.html">KuduColumnSpec</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classkudu_1_1client_1_1KuduSchemaBuilder.html#a0fdf28d49cc05ba4f3182f7398ddf600">AddColumn</a> (const std::string &amp;name)</td></tr>
 <tr class="separator:a0fdf28d49cc05ba4f3182f7398ddf600"><td class="memSeparator" colspan="2">&#160;</td></tr>
 <tr class="memitem:ad4c1619445fea575a775f23752b6bfb9"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classkudu_1_1client_1_1KuduSchemaBuilder.html">KuduSchemaBuilder</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classkudu_1_1client_1_1KuduSchemaBuilder.html#ad4c1619445fea575a775f23752b6bfb9">SetPrimaryKey</a> (const std::vector&lt; std::string &gt; &amp;key_col_names)</td></tr>
 <tr class="separator:ad4c1619445fea575a775f23752b6bfb9"><td class="memSeparator" colspan="2">&#160;</td></tr>
 <tr class="memitem:af117e347a7d0910dda2695997859db15"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classkudu_1_1Status.html">Status</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classkudu_1_1client_1_1KuduSchemaBuilder.html#af117e347a7d0910dda2695997859db15">Build</a> (<a class="el" href="classkudu_1_1client_1_1KuduSchema.html">KuduSchema</a> *schema)</td></tr>
 <tr class="separator:af117e347a7d0910dda2695997859db15"><td class="memSeparator" colspan="2">&#160;</td></tr>
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 <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
 <div class="textblock"><p>Builder API for constructing a <a class="el" href="classkudu_1_1client_1_1KuduSchema.html" title="A representation of a table&#39;s schema. ">KuduSchema</a> object. </p>
 <p>The API here is a "fluent" style of programming, such that the resulting code looks somewhat like a SQL "CREATE TABLE" statement. For example:</p>
 <p>SQL: </p><div class="fragment"><div class="line">CREATE TABLE t (</div><div class="line">  my_key <span class="keywordtype">int</span> not null primary key,</div><div class="line">  a <span class="keywordtype">float</span> <span class="keywordflow">default</span> 1.5</div><div class="line">);</div></div><!-- fragment --><p>is represented as: </p><div class="fragment"><div class="line">KuduSchemaBuilder t;</div><div class="line">t.AddColumn(<span class="stringliteral">&quot;my_key&quot;</span>)-&gt;Type(KuduColumnSchema::INT32)-&gt;NotNull()-&gt;PrimaryKey();</div><div class="line">t.AddColumn(<span class="stringliteral">&quot;a&quot;</span>)-&gt;Type(KuduColumnSchema::FLOAT)-&gt;Default(KuduValue::FromFloat(1.5));</div><div class="line">KuduSchema schema;</div><div class="line">t.Build(&amp;schema);</div></div><!-- fragment --> </div><h2 class="groupheader">Member Function Documentation</h2>
 <a class="anchor" id="a0fdf28d49cc05ba4f3182f7398ddf600"></a>
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 <div class="memproto">
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           <td class="memname"><a class="el" href="classkudu_1_1client_1_1KuduColumnSpec.html">KuduColumnSpec</a>* kudu::client::KuduSchemaBuilder::AddColumn </td>
           <td>(</td>
           <td class="paramtype">const std::string &amp;&#160;</td>
           <td class="paramname"><em>name</em></td><td>)</td>
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 <p>Add a column with the specified name to the schema.</p>
 <dl class="params"><dt>Parameters</dt><dd>
   <table class="params">
     <tr><td class="paramdir">[in]</td><td class="paramname">name</td><td>Name of the column to add. </td></tr>
   </table>
   </dd>
 </dl>
 <dl class="section return"><dt>Returns</dt><dd>A <a class="el" href="classkudu_1_1client_1_1KuduColumnSpec.html" title="Builder API for specifying or altering a column within a table schema. ">KuduColumnSpec</a> object for a new column within the Schema. The returned object is owned by the <a class="el" href="classkudu_1_1client_1_1KuduSchemaBuilder.html" title="Builder API for constructing a KuduSchema object. ">KuduSchemaBuilder</a>. </dd></dl>

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 <a class="anchor" id="af117e347a7d0910dda2695997859db15"></a>
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           <td class="memname"><a class="el" href="classkudu_1_1Status.html">Status</a> kudu::client::KuduSchemaBuilder::Build </td>
           <td>(</td>
           <td class="paramtype"><a class="el" href="classkudu_1_1client_1_1KuduSchema.html">KuduSchema</a> *&#160;</td>
           <td class="paramname"><em>schema</em></td><td>)</td>
           <td></td>
         </tr>
       </table>
 </div><div class="memdoc">
 <p>Build the schema based on current configuration of the builder object.</p>
 <dl class="params"><dt>Parameters</dt><dd>
   <table class="params">
     <tr><td class="paramdir">[out]</td><td class="paramname">schema</td><td>The placeholder for the result schema. Upon successful completion, the parameter is reset to the result of this builder: literally, calling <a class="el" href="classkudu_1_1client_1_1KuduSchema.html#a3f51ccf1a7e6f4a4fe4958073305dbab">KuduSchema::Reset()</a> on the parameter. </td></tr>
   </table>
   </dd>
 </dl>
 <dl class="section return"><dt>Returns</dt><dd>Operation result status. If the resulting would-be-schema is invalid for any reason (e.g. missing types, duplicate column names, etc.) a bad <a class="el" href="classkudu_1_1Status.html" title="A representation of an operation&#39;s outcome. ">Status</a> is returned. </dd></dl>

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           <td class="memname"><a class="el" href="classkudu_1_1client_1_1KuduSchemaBuilder.html">KuduSchemaBuilder</a>* kudu::client::KuduSchemaBuilder::SetPrimaryKey </td>
           <td>(</td>
           <td class="paramtype">const std::vector&lt; std::string &gt; &amp;&#160;</td>
           <td class="paramname"><em>key_col_names</em></td><td>)</td>
           <td></td>
         </tr>
       </table>
 </div><div class="memdoc">
 <p>Set the primary key of the new Schema based on the given column names.</p>
 <p>This may be used to specify a compound primary key.</p>
 <dl class="params"><dt>Parameters</dt><dd>
   <table class="params">
     <tr><td class="paramdir">[in]</td><td class="paramname">key_col_names</td><td>Names of the columns to include into the compound primary key. </td></tr>
   </table>
   </dd>
 </dl>
 <dl class="section return"><dt>Returns</dt><dd>Pointer to the modified object. </dd></dl>

 </div>
 </div>
 <hr/>The documentation for this class was generated from the following file:<ul>
 <li>include/kudu/client/<a class="el" href="schema_8h_source.html">schema.h</a></li>
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	<p>Builder API for constructing a <a class="el" href="classkudu_1_1client_1_1KuduSchema.html" title="A representation of a table's schema. ">KuduSchema</a> object.
	<a href="classkudu_1_1client_1_1KuduSchemaBuilder.html#details">More...</a></p>

	<p><code>#include <<a class="el" href="schema_8h_source.html">schema.h</a>></code></p>
	<table class="memberdecls">
	<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
	Public Member Functions</h2></td></tr>
	<tr class="memitem:a0fdf28d49cc05ba4f3182f7398ddf600"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classkudu_1_1client_1_1KuduColumnSpec.html">KuduColumnSpec</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="classkudu_1_1client_1_1KuduSchemaBuilder.html#a0fdf28d49cc05ba4f3182f7398ddf600">AddColumn</a> (const std::string &name)</td></tr>
	<tr class="separator:a0fdf28d49cc05ba4f3182f7398ddf600"><td class="memSeparator" colspan="2"> </td></tr>
	<tr class="memitem:ad4c1619445fea575a775f23752b6bfb9"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classkudu_1_1client_1_1KuduSchemaBuilder.html">KuduSchemaBuilder</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="classkudu_1_1client_1_1KuduSchemaBuilder.html#ad4c1619445fea575a775f23752b6bfb9">SetPrimaryKey</a> (const std::vector< std::string > &key_col_names)</td></tr>
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	<tr class="memitem:af117e347a7d0910dda2695997859db15"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classkudu_1_1Status.html">Status</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classkudu_1_1client_1_1KuduSchemaBuilder.html#af117e347a7d0910dda2695997859db15">Build</a> (<a class="el" href="classkudu_1_1client_1_1KuduSchema.html">KuduSchema</a> *schema)</td></tr>
	<tr class="separator:af117e347a7d0910dda2695997859db15"><td class="memSeparator" colspan="2"> </td></tr>
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	<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
	<div class="textblock"><p>Builder API for constructing a <a class="el" href="classkudu_1_1client_1_1KuduSchema.html" title="A representation of a table's schema. ">KuduSchema</a> object. </p>
	<p>The API here is a "fluent" style of programming, such that the resulting code looks somewhat like a SQL "CREATE TABLE" statement. For example:</p>
	<p>SQL: </p><div class="fragment"><div class="line">CREATE TABLE t (</div><div class="line"> my_key <span class="keywordtype">int</span> not null primary key,</div><div class="line"> a <span class="keywordtype">float</span> <span class="keywordflow">default</span> 1.5</div><div class="line">);</div></div><!-- fragment --><p>is represented as: </p><div class="fragment"><div class="line">KuduSchemaBuilder t;</div><div class="line">t.AddColumn(<span class="stringliteral">"my_key"</span>)->Type(KuduColumnSchema::INT32)->NotNull()->PrimaryKey();</div><div class="line">t.AddColumn(<span class="stringliteral">"a"</span>)->Type(KuduColumnSchema::FLOAT)->Default(KuduValue::FromFloat(1.5));</div><div class="line">KuduSchema schema;</div><div class="line">t.Build(&schema);</div></div><!-- fragment --> </div><h2 class="groupheader">Member Function Documentation</h2>
	<a class="anchor" id="a0fdf28d49cc05ba4f3182f7398ddf600"></a>
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	<td class="memname"><a class="el" href="classkudu_1_1client_1_1KuduColumnSpec.html">KuduColumnSpec</a>* kudu::client::KuduSchemaBuilder::AddColumn </td>
	<td>(</td>
	<td class="paramtype">const std::string & </td>
	<td class="paramname"><em>name</em></td><td>)</td>
	<td></td>
	</tr>
	</table>
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	<p>Add a column with the specified name to the schema.</p>
	<dl class="params"><dt>Parameters</dt><dd>
	<table class="params">
	<tr><td class="paramdir">[in]</td><td class="paramname">name</td><td>Name of the column to add. </td></tr>
	</table>
	</dd>
	</dl>
	<dl class="section return"><dt>Returns</dt><dd>A <a class="el" href="classkudu_1_1client_1_1KuduColumnSpec.html" title="Builder API for specifying or altering a column within a table schema. ">KuduColumnSpec</a> object for a new column within the Schema. The returned object is owned by the <a class="el" href="classkudu_1_1client_1_1KuduSchemaBuilder.html" title="Builder API for constructing a KuduSchema object. ">KuduSchemaBuilder</a>. </dd></dl>

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	<td class="memname"><a class="el" href="classkudu_1_1Status.html">Status</a> kudu::client::KuduSchemaBuilder::Build </td>
	<td>(</td>
	<td class="paramtype"><a class="el" href="classkudu_1_1client_1_1KuduSchema.html">KuduSchema</a> * </td>
	<td class="paramname"><em>schema</em></td><td>)</td>
	<td></td>
	</tr>
	</table>
	</div><div class="memdoc">
	<p>Build the schema based on current configuration of the builder object.</p>
	<dl class="params"><dt>Parameters</dt><dd>
	<table class="params">
	<tr><td class="paramdir">[out]</td><td class="paramname">schema</td><td>The placeholder for the result schema. Upon successful completion, the parameter is reset to the result of this builder: literally, calling <a class="el" href="classkudu_1_1client_1_1KuduSchema.html#a3f51ccf1a7e6f4a4fe4958073305dbab">KuduSchema::Reset()</a> on the parameter. </td></tr>
	</table>
	</dd>
	</dl>
	<dl class="section return"><dt>Returns</dt><dd>Operation result status. If the resulting would-be-schema is invalid for any reason (e.g. missing types, duplicate column names, etc.) a bad <a class="el" href="classkudu_1_1Status.html" title="A representation of an operation's outcome. ">Status</a> is returned. </dd></dl>

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	<td class="memname"><a class="el" href="classkudu_1_1client_1_1KuduSchemaBuilder.html">KuduSchemaBuilder</a>* kudu::client::KuduSchemaBuilder::SetPrimaryKey </td>
	<td>(</td>
	<td class="paramtype">const std::vector< std::string > & </td>
	<td class="paramname"><em>key_col_names</em></td><td>)</td>
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	<p>Set the primary key of the new Schema based on the given column names.</p>
	<p>This may be used to specify a compound primary key.</p>
	<dl class="params"><dt>Parameters</dt><dd>
	<table class="params">
	<tr><td class="paramdir">[in]</td><td class="paramname">key_col_names</td><td>Names of the columns to include into the compound primary key. </td></tr>
	</table>
	</dd>
	</dl>
	<dl class="section return"><dt>Returns</dt><dd>Pointer to the modified object. </dd></dl>

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	<hr/>The documentation for this class was generated from the following file:<ul>
	<li>include/kudu/client/<a class="el" href="schema_8h_source.html">schema.h</a></li>
	</ul>
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