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<title>BNF for the Object Query Language</title>
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<h1 class="title topictitle1">BNF for the Object Query Language</h1>
<div class="body refbody">
<div class="section">
<table cellpadding="4" cellspacing="0" summary="" id="ref_bnfofoql__oql_table" border="1" class="simpletable"><tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock">SelectStatement</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">::=</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">"SELECT" SelectList FromClause ( WhereClause )? ( UnionClause )?</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock">SelectList</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">::=</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">(( "DISTINCT" | "AS RETAINED SET" )? ( "*" | "OBJECTS" SelectItem | SelectItem ( "," SelectItem )* ))</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock">SelectItem</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">::=</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">( PathExpression | EnvVarPathExpression ) ( "AS" ( &lt;STRING_LITERAL&gt; | &lt;IDENTIFIER&gt; ) )?</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock">PathExpression</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">::=</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">( ObjectFacet | BuiltInFunction ) ( "." ObjectFacet | "[" SimpleExpression ( ":" SimpleExpression)? "]" )*</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock">EnvVarPathExpression</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">::=</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">( "$" "{" &lt;IDENTIFIER&gt; "}" ) ( "." ObjectFacet | "[" SimpleExpression ( ":" SimpleExpression)? "]" )*</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock">ObjectFacet</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">::=</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">( ( "@" )? &lt;IDENTIFIER&gt; ( ParameterList )? )</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock">ParameterList</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">::=</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">"(" ( ( SimpleExpression ( "," SimpleExpression )* ) )? ")"</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock">FromClause</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">::=</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">"FROM" ( "OBJECTS" )? ( "INSTANCEOF" )? ( FromItem | "(" SelectStatement ")" ) ( &lt;IDENTIFIER&gt; )?</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock">FromItem</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">::=</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">( ClassName | &lt;STRING_LITERAL&gt; | ObjectAddress ( "," ObjectAddress )* | ObjectId ( "," ObjectId )* | EnvVarPathExpression )</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock">ClassName</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">::=</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">( &lt;IDENTIFIER&gt; ( "." &lt;IDENTIFIER&gt; )* ( "[]" )* )</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock">ObjectAddress</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">::=</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">&lt;HEX_LITERAL&gt;</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock">ObjectId</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">::=</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">&lt;INTEGER_LITERAL&gt;</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock">WhereClause</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">::=</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">"WHERE" ConditionalOrExpression</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock">ConditionalOrExpression</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">::=</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">ConditionalAndExpression ( "or" ConditionalAndExpression )*</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock">ConditionalAndExpression</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">::=</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">EqualityExpression ( "and" EqualityExpression )*</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock">EqualityExpression</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">::=</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">RelationalExpression ( ( "=" RelationalExpression | "!=" RelationalExpression ) )*</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock">RelationalExpression</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">::=</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">( SimpleExpression ( ( "&lt;" SimpleExpression | "&gt;" SimpleExpression | "&lt;=" SimpleExpression | "&gt;=" SimpleExpression | ( LikeClause | InClause ) | "implements" ClassName ) )? )</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock">LikeClause</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">::=</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">( "NOT" )? "LIKE" &lt;STRING_LITERAL&gt;</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock">InClause</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">::=</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">( "NOT" )? "IN" SimpleExpression</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock">SimpleExpression</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">::=</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">MultiplicativeExpression ( "+" MultiplicativeExpression | "-" MultiplicativeExpression )*</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock">MultiplicativeExpression</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">::=</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">PrimaryExpression ( "*" PrimaryExpression | "/" PrimaryExpression )*</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock">PrimaryExpression</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">::=</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">Literal</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock"> </pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">|</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">"(" ( ConditionalOrExpression | SubQuery ) ")</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock"> </pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">|</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">PathExpression</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock"> </pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">|</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">EnvVarPathExpression</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock">SubQuery</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">::=</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">SelectStatement</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock">Function</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">::=</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">( ( "toHex" | "toString" | "dominators" | "outbounds" | "inbounds" | "classof" | "dominatorof" ) "(" ConditionalOrExpression ")" )</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock">Literal</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">::=</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">( &lt;INTEGER_LITERAL&gt; | &lt;LONG_LITERAL&gt; | &lt;FLOATING_POINT_LITERAL&gt; | &lt;CHARACTER_LITERAL&gt; | &lt;STRING_LITERAL&gt; | BooleanLiteral | NullLiteral )</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock">BooleanLiteral</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">::=</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">"true"</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock"> </pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">|</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">"false"</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock">NullLiteral</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">::=</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">&lt;NULL&gt;</pre>
</td>
</tr>
<tr class="strow">
<td valign="top" class="stentry"><pre class="pre codeblock">UnionClause</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">::=</pre>
</td>
<td valign="top" class="stentry"><pre class="pre codeblock">( "UNION" "(" SelectStatement ")" )+</pre>
</td>
</tr>
</table>
</div>
</div>
<div class="related-links">
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a class="link" href="../reference/oqlsyntax.html">OQL Syntax</a></div>
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