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| <li>Summary: </li> |
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| <div class="subTitle">org.apache.calcite.rex</div> |
| <h2 title="Class RexProgram" class="title">Class RexProgram</h2> |
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| <li>org.apache.calcite.rex.RexProgram</li> |
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| <pre>public class <span class="typeNameLabel">RexProgram</span> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre> |
| <div class="block">A collection of expressions which read inputs, compute output expressions, |
| and optionally use a condition to filter rows. |
| |
| <p>Programs are immutable. It may help to use a <a href="../../../../org/apache/calcite/rex/RexProgramBuilder.html" title="class in org.apache.calcite.rex"><code>RexProgramBuilder</code></a>, |
| which has the same relationship to <a href="../../../../org/apache/calcite/rex/RexProgram.html" title="class in org.apache.calcite.rex"><code>RexProgram</code></a> as <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/StringBuilder.html?is-external=true" title="class or interface in java.lang"><code>StringBuilder</code></a> |
| has to <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang"><code>String</code></a>. |
| |
| <p>A program can contain aggregate functions. If it does, the arguments to |
| each aggregate function must be an <a href="../../../../org/apache/calcite/rex/RexInputRef.html" title="class in org.apache.calcite.rex"><code>RexInputRef</code></a>.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../org/apache/calcite/rex/RexProgramBuilder.html" title="class in org.apache.calcite.rex"><code>RexProgramBuilder</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| </div> |
| <div class="summary"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
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| <h3>Constructor Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation"> |
| <caption><span>Constructors</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colOne" scope="col">Constructor and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#RexProgram-org.apache.calcite.rel.type.RelDataType-java.util.List-java.util.List-org.apache.calcite.rex.RexLocalRef-org.apache.calcite.rel.type.RelDataType-">RexProgram</a></span>(<a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> inputRowType, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><? extends <a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> exprs, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../org/apache/calcite/rex/RexLocalRef.html" title="class in org.apache.calcite.rex">RexLocalRef</a>> projects, |
| <a href="../../../../org/apache/calcite/rex/RexLocalRef.html" title="class in org.apache.calcite.rex">RexLocalRef</a> condition, |
| <a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> outputRowType)</code> |
| <div class="block">Creates a program.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| <!-- ========== METHOD SUMMARY =========== --> |
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| </a> |
| <h3>Method Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span><span id="t6" class="tableTab"><span><a href="javascript:show(32);">Deprecated Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rel/RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#collectExplainTerms-java.lang.String-org.apache.calcite.rel.RelWriter-">collectExplainTerms</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> prefix, |
| <a href="../../../../org/apache/calcite/rel/RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a> pw)</code> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rel/RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#collectExplainTerms-java.lang.String-org.apache.calcite.rel.RelWriter-org.apache.calcite.sql.SqlExplainLevel-">collectExplainTerms</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> prefix, |
| <a href="../../../../org/apache/calcite/rel/RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a> pw, |
| <a href="../../../../org/apache/calcite/sql/SqlExplainLevel.html" title="enum in org.apache.calcite.sql">SqlExplainLevel</a> level)</code> |
| <div class="block">Collects the expressions in this program into a list of terms and values.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#containsAggs--">containsAggs</a></span>()</code> |
| <div class="block">Returns whether this program contains windowed aggregate functions</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>static <a href="../../../../org/apache/calcite/rex/RexProgram.html" title="class in org.apache.calcite.rex">RexProgram</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#create-org.apache.calcite.rel.type.RelDataType-java.util.List-org.apache.calcite.rex.RexNode-java.util.List-org.apache.calcite.rex.RexBuilder-">create</a></span>(<a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> inputRowType, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><? extends <a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> projectExprs, |
| <a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> conditionExpr, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>> fieldNames, |
| <a href="../../../../org/apache/calcite/rex/RexBuilder.html" title="class in org.apache.calcite.rex">RexBuilder</a> rexBuilder)</code> |
| <div class="block">Creates a program which calculates projections and filters rows based |
| upon a condition.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>static <a href="../../../../org/apache/calcite/rex/RexProgram.html" title="class in org.apache.calcite.rex">RexProgram</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#create-org.apache.calcite.rel.type.RelDataType-java.util.List-org.apache.calcite.rex.RexNode-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.rex.RexBuilder-">create</a></span>(<a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> inputRowType, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><? extends <a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> projectExprs, |
| <a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> conditionExpr, |
| <a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> outputRowType, |
| <a href="../../../../org/apache/calcite/rex/RexBuilder.html" title="class in org.apache.calcite.rex">RexBuilder</a> rexBuilder)</code> |
| <div class="block">Creates a program which calculates projections and filters rows based |
| upon a condition.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>static <a href="../../../../org/apache/calcite/rex/RexProgram.html" title="class in org.apache.calcite.rex">RexProgram</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#create-org.apache.calcite.rel.RelInput-">create</a></span>(<a href="../../../../org/apache/calcite/rel/RelInput.html" title="interface in org.apache.calcite.rel">RelInput</a> input)</code> |
| <div class="block">Create a program from serialized output.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>static <a href="../../../../org/apache/calcite/rex/RexProgram.html" title="class in org.apache.calcite.rex">RexProgram</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#createIdentity-org.apache.calcite.rel.type.RelDataType-">createIdentity</a></span>(<a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> rowType)</code> |
| <div class="block">Creates the identity program.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>static <a href="../../../../org/apache/calcite/rex/RexProgram.html" title="class in org.apache.calcite.rex">RexProgram</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#createIdentity-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.rel.type.RelDataType-">createIdentity</a></span>(<a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> rowType, |
| <a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> outputRowType)</code> |
| <div class="block">Creates a program that projects its input fields but with possibly |
| different names for the output fields.</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#deduceCollations-java.util.List-int-java.util.List-java.util.List-">deduceCollations</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../org/apache/calcite/rel/RelCollation.html" title="interface in org.apache.calcite.rel">RelCollation</a>> outputCollations, |
| int sourceCount, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../org/apache/calcite/rex/RexLocalRef.html" title="class in org.apache.calcite.rex">RexLocalRef</a>> refs, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../org/apache/calcite/rel/RelCollation.html" title="interface in org.apache.calcite.rel">RelCollation</a>> inputCollations)</code> |
| <div class="block">Given a list of expressions and a description of which are ordered, |
| populates a list of collations, sorted in natural order.</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#expandLocalRef-org.apache.calcite.rex.RexLocalRef-">expandLocalRef</a></span>(<a href="../../../../org/apache/calcite/rex/RexLocalRef.html" title="class in org.apache.calcite.rex">RexLocalRef</a> ref)</code> |
| <div class="block">Fully expands a RexLocalRef back into a pure RexNode tree containing no |
| RexLocalRefs (reversing the effect of common subexpression elimination).</div> |
| </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rel/RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#explainCalc-org.apache.calcite.rel.RelWriter-">explainCalc</a></span>(<a href="../../../../org/apache/calcite/rel/RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a> pw)</code> |
| <div class="block">Writes an explanation of the expressions in this program to a plan |
| writer.</div> |
| </td> |
| </tr> |
| <tr id="i11" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#gatherExpr-org.apache.calcite.rex.RexNode-">gatherExpr</a></span>(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> expr)</code> </td> |
| </tr> |
| <tr id="i12" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../org/apache/calcite/rel/RelCollation.html" title="interface in org.apache.calcite.rel">RelCollation</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#getCollations-java.util.List-">getCollations</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../org/apache/calcite/rel/RelCollation.html" title="interface in org.apache.calcite.rel">RelCollation</a>> inputCollations)</code> |
| <div class="block">Given a list of collations which hold for the input to this program, |
| returns a list of collations which hold for its output.</div> |
| </td> |
| </tr> |
| <tr id="i13" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rex/RexLocalRef.html" title="class in org.apache.calcite.rex">RexLocalRef</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#getCondition--">getCondition</a></span>()</code> |
| <div class="block">Returns the field reference of this program's filter condition, or null |
| if there is no condition.</div> |
| </td> |
| </tr> |
| <tr id="i14" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#getCorrelVariableNames--">getCorrelVariableNames</a></span>()</code> |
| <div class="block">Returns the set of correlation variables used (read) by this program.</div> |
| </td> |
| </tr> |
| <tr id="i15" class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#getExprCount--">getExprCount</a></span>()</code> |
| <div class="block">Returns the number of expressions in this program.</div> |
| </td> |
| </tr> |
| <tr id="i16" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#getExprList--">getExprList</a></span>()</code> |
| <div class="block">Returns the common sub-expressions of this program.</div> |
| </td> |
| </tr> |
| <tr id="i17" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#getInputRowType--">getInputRowType</a></span>()</code> |
| <div class="block">Returns the type of the input row to the program.</div> |
| </td> |
| </tr> |
| <tr id="i18" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../org/apache/calcite/util/Pair.html" title="class in org.apache.calcite.util">Pair</a><<a href="../../../../org/apache/calcite/rex/RexLocalRef.html" title="class in org.apache.calcite.rex">RexLocalRef</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#getNamedProjects--">getNamedProjects</a></span>()</code> |
| <div class="block">Returns a list of project expressions and their field names.</div> |
| </td> |
| </tr> |
| <tr id="i19" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#getOutputRowType--">getOutputRowType</a></span>()</code> |
| <div class="block">Returns the type of the output row from this program.</div> |
| </td> |
| </tr> |
| <tr id="i20" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/util/mapping/Mappings.TargetMapping.html" title="interface in org.apache.calcite.util.mapping">Mappings.TargetMapping</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#getPartialMapping-int-">getPartialMapping</a></span>(int inputFieldCount)</code> |
| <div class="block">Returns a partial mapping of a set of project expressions.</div> |
| </td> |
| </tr> |
| <tr id="i21" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/util/Permutation.html" title="class in org.apache.calcite.util">Permutation</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#getPermutation--">getPermutation</a></span>()</code> |
| <div class="block">Returns a permutation, if this program is a permutation, otherwise null.</div> |
| </td> |
| </tr> |
| <tr id="i22" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../org/apache/calcite/rex/RexLocalRef.html" title="class in org.apache.calcite.rex">RexLocalRef</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#getProjectList--">getProjectList</a></span>()</code> |
| <div class="block">Returns an array of references to the expressions which this program is |
| to project.</div> |
| </td> |
| </tr> |
| <tr id="i23" class="rowColor"> |
| <td class="colFirst"><code>int[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#getReferenceCounts--">getReferenceCounts</a></span>()</code> |
| <div class="block">Gets reference counts for each expression in the program, where the |
| references are detected from later expressions in the same program, as |
| well as the project list and condition.</div> |
| </td> |
| </tr> |
| <tr id="i24" class="altColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#getSourceField-int-">getSourceField</a></span>(int outputOrdinal)</code> |
| <div class="block">Returns the input field that an output field is populated from, or -1 if |
| it is populated from an expression.</div> |
| </td> |
| </tr> |
| <tr id="i25" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#isConstant-org.apache.calcite.rex.RexNode-">isConstant</a></span>(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> ref)</code> |
| <div class="block">Returns whether an expression is constant.</div> |
| </td> |
| </tr> |
| <tr id="i26" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#isNormalized-org.apache.calcite.util.Litmus-org.apache.calcite.rex.RexBuilder-">isNormalized</a></span>(<a href="../../../../org/apache/calcite/util/Litmus.html" title="interface in org.apache.calcite.util">Litmus</a> litmus, |
| <a href="../../../../org/apache/calcite/rex/RexBuilder.html" title="class in org.apache.calcite.rex">RexBuilder</a> rexBuilder)</code> |
| <div class="block">Returns whether this program is in canonical form.</div> |
| </td> |
| </tr> |
| <tr id="i27" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#isNull-org.apache.calcite.rex.RexNode-">isNull</a></span>(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> expr)</code> |
| <div class="block">Returns whether an expression always evaluates to null.</div> |
| </td> |
| </tr> |
| <tr id="i28" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#isPermutation--">isPermutation</a></span>()</code> |
| <div class="block">Returns whether this program is a permutation of its inputs.</div> |
| </td> |
| </tr> |
| <tr id="i29" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#isTrivial--">isTrivial</a></span>()</code> |
| <div class="block">Returns whether this program returns its input exactly.</div> |
| </td> |
| </tr> |
| <tr id="i30" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#isValid-org.apache.calcite.util.Litmus-org.apache.calcite.rel.RelNode.Context-">isValid</a></span>(<a href="../../../../org/apache/calcite/util/Litmus.html" title="interface in org.apache.calcite.util">Litmus</a> litmus, |
| <a href="../../../../org/apache/calcite/rel/RelNode.Context.html" title="interface in org.apache.calcite.rel">RelNode.Context</a> context)</code> |
| <div class="block">Checks that this program is valid.</div> |
| </td> |
| </tr> |
| <tr id="i31" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rex/RexProgram.html" title="class in org.apache.calcite.rex">RexProgram</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#normalize-org.apache.calcite.rex.RexBuilder-boolean-">normalize</a></span>(<a href="../../../../org/apache/calcite/rex/RexBuilder.html" title="class in org.apache.calcite.rex">RexBuilder</a> rexBuilder, |
| boolean simplify)</code> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span> </div> |
| </td> |
| </tr> |
| <tr id="i32" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rex/RexProgram.html" title="class in org.apache.calcite.rex">RexProgram</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#normalize-org.apache.calcite.rex.RexBuilder-org.apache.calcite.rex.RexSimplify-">normalize</a></span>(<a href="../../../../org/apache/calcite/rex/RexBuilder.html" title="class in org.apache.calcite.rex">RexBuilder</a> rexBuilder, |
| <a href="../../../../org/apache/calcite/rex/RexSimplify.html" title="class in org.apache.calcite.rex">RexSimplify</a> simplify)</code> |
| <div class="block">Creates a simplified/normalized copy of this program.</div> |
| </td> |
| </tr> |
| <tr id="i33" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#projectsIdentity-boolean-">projectsIdentity</a></span>(boolean fail)</code> |
| <div class="block">Returns whether the fields on the leading edge of the project list are |
| the input fields.</div> |
| </td> |
| </tr> |
| <tr id="i34" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#projectsOnlyIdentity--">projectsOnlyIdentity</a></span>()</code> |
| <div class="block">Returns whether this program projects precisely its input fields.</div> |
| </td> |
| </tr> |
| <tr id="i35" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/util/Pair.html" title="class in org.apache.calcite.util">Pair</a><com.google.common.collect.ImmutableList<<a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>>,com.google.common.collect.ImmutableList<<a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#split--">split</a></span>()</code> |
| <div class="block">Splits this program into a list of project expressions and a list of |
| filter expressions.</div> |
| </td> |
| </tr> |
| <tr id="i36" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexProgram.html#toString--">toString</a></span>()</code> </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a name="methods.inherited.from.class.java.lang.Object"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from class java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="constructor.detail"> |
| <!-- --> |
| </a> |
| <h3>Constructor Detail</h3> |
| <a name="RexProgram-org.apache.calcite.rel.type.RelDataType-java.util.List-java.util.List-org.apache.calcite.rex.RexLocalRef-org.apache.calcite.rel.type.RelDataType-"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
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| <h4>RexProgram</h4> |
| <pre>public RexProgram(<a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> inputRowType, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><? extends <a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> exprs, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../org/apache/calcite/rex/RexLocalRef.html" title="class in org.apache.calcite.rex">RexLocalRef</a>> projects, |
| <a href="../../../../org/apache/calcite/rex/RexLocalRef.html" title="class in org.apache.calcite.rex">RexLocalRef</a> condition, |
| <a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> outputRowType)</pre> |
| <div class="block">Creates a program. |
| |
| <p>The expressions must be valid: they must not contain common expressions, |
| forward references, or non-trivial aggregates.</p></div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>inputRowType</code> - Input row type</dd> |
| <dd><code>exprs</code> - Common expressions</dd> |
| <dd><code>projects</code> - Projection expressions</dd> |
| <dd><code>condition</code> - Condition expression. If null, calculator does not |
| filter rows</dd> |
| <dd><code>outputRowType</code> - Description of the row produced by the program</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ============ METHOD DETAIL ========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="method.detail"> |
| <!-- --> |
| </a> |
| <h3>Method Detail</h3> |
| <a name="getExprList--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getExprList</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> getExprList()</pre> |
| <div class="block">Returns the common sub-expressions of this program. |
| |
| <p>The list is never null but may be empty; each the expression in the |
| list is not null; and no further reduction into smaller common |
| sub-expressions is possible.</div> |
| </li> |
| </ul> |
| <a name="getProjectList--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getProjectList</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../org/apache/calcite/rex/RexLocalRef.html" title="class in org.apache.calcite.rex">RexLocalRef</a>> getProjectList()</pre> |
| <div class="block">Returns an array of references to the expressions which this program is |
| to project. Never null, may be empty.</div> |
| </li> |
| </ul> |
| <a name="getNamedProjects--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getNamedProjects</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../org/apache/calcite/util/Pair.html" title="class in org.apache.calcite.util">Pair</a><<a href="../../../../org/apache/calcite/rex/RexLocalRef.html" title="class in org.apache.calcite.rex">RexLocalRef</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>>> getNamedProjects()</pre> |
| <div class="block">Returns a list of project expressions and their field names.</div> |
| </li> |
| </ul> |
| <a name="getCondition--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getCondition</h4> |
| <pre>public <a href="../../../../org/apache/calcite/rex/RexLocalRef.html" title="class in org.apache.calcite.rex">RexLocalRef</a> getCondition()</pre> |
| <div class="block">Returns the field reference of this program's filter condition, or null |
| if there is no condition.</div> |
| </li> |
| </ul> |
| <a name="create-org.apache.calcite.rel.type.RelDataType-java.util.List-org.apache.calcite.rex.RexNode-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.rex.RexBuilder-"> |
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| <h4>create</h4> |
| <pre>public static <a href="../../../../org/apache/calcite/rex/RexProgram.html" title="class in org.apache.calcite.rex">RexProgram</a> create(<a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> inputRowType, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><? extends <a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> projectExprs, |
| <a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> conditionExpr, |
| <a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> outputRowType, |
| <a href="../../../../org/apache/calcite/rex/RexBuilder.html" title="class in org.apache.calcite.rex">RexBuilder</a> rexBuilder)</pre> |
| <div class="block">Creates a program which calculates projections and filters rows based |
| upon a condition. Does not attempt to eliminate common sub-expressions.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>projectExprs</code> - Project expressions</dd> |
| <dd><code>conditionExpr</code> - Condition on which to filter rows, or null if rows |
| are not to be filtered</dd> |
| <dd><code>outputRowType</code> - Output row type</dd> |
| <dd><code>rexBuilder</code> - Builder of rex expressions</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>A program</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="create-org.apache.calcite.rel.type.RelDataType-java.util.List-org.apache.calcite.rex.RexNode-java.util.List-org.apache.calcite.rex.RexBuilder-"> |
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| </a> |
| <ul class="blockList"> |
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| <h4>create</h4> |
| <pre>public static <a href="../../../../org/apache/calcite/rex/RexProgram.html" title="class in org.apache.calcite.rex">RexProgram</a> create(<a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> inputRowType, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><? extends <a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> projectExprs, |
| <a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> conditionExpr, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>> fieldNames, |
| <a href="../../../../org/apache/calcite/rex/RexBuilder.html" title="class in org.apache.calcite.rex">RexBuilder</a> rexBuilder)</pre> |
| <div class="block">Creates a program which calculates projections and filters rows based |
| upon a condition. Does not attempt to eliminate common sub-expressions.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>projectExprs</code> - Project expressions</dd> |
| <dd><code>conditionExpr</code> - Condition on which to filter rows, or null if rows |
| are not to be filtered</dd> |
| <dd><code>fieldNames</code> - Names of projected fields</dd> |
| <dd><code>rexBuilder</code> - Builder of rex expressions</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>A program</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="create-org.apache.calcite.rel.RelInput-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>create</h4> |
| <pre>public static <a href="../../../../org/apache/calcite/rex/RexProgram.html" title="class in org.apache.calcite.rex">RexProgram</a> create(<a href="../../../../org/apache/calcite/rel/RelInput.html" title="interface in org.apache.calcite.rel">RelInput</a> input)</pre> |
| <div class="block">Create a program from serialized output. |
| In this case, the input is mainly from the output json string of <a href="../../../../org/apache/calcite/rel/externalize/RelJsonWriter.html" title="class in org.apache.calcite.rel.externalize"><code>RelJsonWriter</code></a></div> |
| </li> |
| </ul> |
| <a name="toString--"> |
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| </a> |
| <ul class="blockList"> |
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| <h4>toString</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> toString()</pre> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a></code> in class <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="explainCalc-org.apache.calcite.rel.RelWriter-"> |
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| <h4>explainCalc</h4> |
| <pre>public <a href="../../../../org/apache/calcite/rel/RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a> explainCalc(<a href="../../../../org/apache/calcite/rel/RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a> pw)</pre> |
| <div class="block">Writes an explanation of the expressions in this program to a plan |
| writer.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>pw</code> - Plan writer</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="collectExplainTerms-java.lang.String-org.apache.calcite.rel.RelWriter-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>collectExplainTerms</h4> |
| <pre>public <a href="../../../../org/apache/calcite/rel/RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a> collectExplainTerms(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> prefix, |
| <a href="../../../../org/apache/calcite/rel/RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a> pw)</pre> |
| </li> |
| </ul> |
| <a name="collectExplainTerms-java.lang.String-org.apache.calcite.rel.RelWriter-org.apache.calcite.sql.SqlExplainLevel-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>collectExplainTerms</h4> |
| <pre>public <a href="../../../../org/apache/calcite/rel/RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a> collectExplainTerms(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> prefix, |
| <a href="../../../../org/apache/calcite/rel/RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a> pw, |
| <a href="../../../../org/apache/calcite/sql/SqlExplainLevel.html" title="enum in org.apache.calcite.sql">SqlExplainLevel</a> level)</pre> |
| <div class="block">Collects the expressions in this program into a list of terms and values.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>prefix</code> - Prefix for term names, usually the empty string, but useful |
| if a relational expression contains more than one program</dd> |
| <dd><code>pw</code> - Plan writer</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getExprCount--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getExprCount</h4> |
| <pre>public int getExprCount()</pre> |
| <div class="block">Returns the number of expressions in this program.</div> |
| </li> |
| </ul> |
| <a name="createIdentity-org.apache.calcite.rel.type.RelDataType-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>createIdentity</h4> |
| <pre>public static <a href="../../../../org/apache/calcite/rex/RexProgram.html" title="class in org.apache.calcite.rex">RexProgram</a> createIdentity(<a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> rowType)</pre> |
| <div class="block">Creates the identity program.</div> |
| </li> |
| </ul> |
| <a name="createIdentity-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.rel.type.RelDataType-"> |
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| </a> |
| <ul class="blockList"> |
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| <h4>createIdentity</h4> |
| <pre>public static <a href="../../../../org/apache/calcite/rex/RexProgram.html" title="class in org.apache.calcite.rex">RexProgram</a> createIdentity(<a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> rowType, |
| <a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> outputRowType)</pre> |
| <div class="block">Creates a program that projects its input fields but with possibly |
| different names for the output fields.</div> |
| </li> |
| </ul> |
| <a name="getInputRowType--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getInputRowType</h4> |
| <pre>public <a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> getInputRowType()</pre> |
| <div class="block">Returns the type of the input row to the program.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>input row type</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="containsAggs--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>containsAggs</h4> |
| <pre>public boolean containsAggs()</pre> |
| <div class="block">Returns whether this program contains windowed aggregate functions</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>whether this program contains windowed aggregate functions</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getOutputRowType--"> |
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| </a> |
| <ul class="blockList"> |
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| <h4>getOutputRowType</h4> |
| <pre>public <a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> getOutputRowType()</pre> |
| <div class="block">Returns the type of the output row from this program.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>output row type</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="isValid-org.apache.calcite.util.Litmus-org.apache.calcite.rel.RelNode.Context-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>isValid</h4> |
| <pre>public boolean isValid(<a href="../../../../org/apache/calcite/util/Litmus.html" title="interface in org.apache.calcite.util">Litmus</a> litmus, |
| <a href="../../../../org/apache/calcite/rel/RelNode.Context.html" title="interface in org.apache.calcite.rel">RelNode.Context</a> context)</pre> |
| <div class="block">Checks that this program is valid. |
| |
| <p>If <code>fail</code> is true, executes <code>assert false</code>, so |
| will throw an <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AssertionError.html?is-external=true" title="class or interface in java.lang"><code>AssertionError</code></a> if assertions are enabled. If <code> |
| fail</code> is false, merely returns whether the program is valid.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>litmus</code> - What to do if an error is detected</dd> |
| <dd><code>context</code> - Context of enclosing <a href="../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel"><code>RelNode</code></a>, for validity checking, |
| or null if not known</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Whether the program is valid</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="isNull-org.apache.calcite.rex.RexNode-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>isNull</h4> |
| <pre>public boolean isNull(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> expr)</pre> |
| <div class="block">Returns whether an expression always evaluates to null. |
| |
| <p>Like <a href="../../../../org/apache/calcite/rex/RexUtil.html#isNull-org.apache.calcite.rex.RexNode-"><code>RexUtil.isNull(RexNode)</code></a>, null literals are null, and |
| casts of null literals are null. But this method also regards references |
| to null expressions as null.</p></div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>expr</code> - Expression</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Whether expression always evaluates to null</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="expandLocalRef-org.apache.calcite.rex.RexLocalRef-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>expandLocalRef</h4> |
| <pre>public <a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> expandLocalRef(<a href="../../../../org/apache/calcite/rex/RexLocalRef.html" title="class in org.apache.calcite.rex">RexLocalRef</a> ref)</pre> |
| <div class="block">Fully expands a RexLocalRef back into a pure RexNode tree containing no |
| RexLocalRefs (reversing the effect of common subexpression elimination). |
| For example, <code>program.expandLocalRef(program.getCondition())</code> |
| will return the expansion of a program's condition.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>ref</code> - a RexLocalRef from this program</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>expanded form</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="split--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>split</h4> |
| <pre>public <a href="../../../../org/apache/calcite/util/Pair.html" title="class in org.apache.calcite.util">Pair</a><com.google.common.collect.ImmutableList<<a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>>,com.google.common.collect.ImmutableList<<a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>>> split()</pre> |
| <div class="block">Splits this program into a list of project expressions and a list of |
| filter expressions. |
| |
| <p>Neither list is null. |
| The filters are evaluated first.</div> |
| </li> |
| </ul> |
| <a name="getCollations-java.util.List-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getCollations</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../org/apache/calcite/rel/RelCollation.html" title="interface in org.apache.calcite.rel">RelCollation</a>> getCollations(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../org/apache/calcite/rel/RelCollation.html" title="interface in org.apache.calcite.rel">RelCollation</a>> inputCollations)</pre> |
| <div class="block">Given a list of collations which hold for the input to this program, |
| returns a list of collations which hold for its output. The result is |
| mutable and sorted.</div> |
| </li> |
| </ul> |
| <a name="deduceCollations-java.util.List-int-java.util.List-java.util.List-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>deduceCollations</h4> |
| <pre>public static void deduceCollations(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../org/apache/calcite/rel/RelCollation.html" title="interface in org.apache.calcite.rel">RelCollation</a>> outputCollations, |
| int sourceCount, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../org/apache/calcite/rex/RexLocalRef.html" title="class in org.apache.calcite.rex">RexLocalRef</a>> refs, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../org/apache/calcite/rel/RelCollation.html" title="interface in org.apache.calcite.rel">RelCollation</a>> inputCollations)</pre> |
| <div class="block">Given a list of expressions and a description of which are ordered, |
| populates a list of collations, sorted in natural order.</div> |
| </li> |
| </ul> |
| <a name="projectsIdentity-boolean-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>projectsIdentity</h4> |
| <pre>public boolean projectsIdentity(boolean fail)</pre> |
| <div class="block">Returns whether the fields on the leading edge of the project list are |
| the input fields.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>fail</code> - Whether to throw an assert failure if does not project |
| identity</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="projectsOnlyIdentity--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>projectsOnlyIdentity</h4> |
| <pre>public boolean projectsOnlyIdentity()</pre> |
| <div class="block">Returns whether this program projects precisely its input fields. It may |
| or may not apply a condition.</div> |
| </li> |
| </ul> |
| <a name="isTrivial--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>isTrivial</h4> |
| <pre>public boolean isTrivial()</pre> |
| <div class="block">Returns whether this program returns its input exactly. |
| |
| <p>This is a stronger condition than <a href="../../../../org/apache/calcite/rex/RexProgram.html#projectsIdentity-boolean-"><code>projectsIdentity(boolean)</code></a>.</div> |
| </li> |
| </ul> |
| <a name="getReferenceCounts--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getReferenceCounts</h4> |
| <pre>public int[] getReferenceCounts()</pre> |
| <div class="block">Gets reference counts for each expression in the program, where the |
| references are detected from later expressions in the same program, as |
| well as the project list and condition. Expressions with references |
| counts greater than 1 are true common sub-expressions.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>array of reference counts; the ith element in the returned array |
| is the number of references to getExprList()[i]</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="isConstant-org.apache.calcite.rex.RexNode-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>isConstant</h4> |
| <pre>public boolean isConstant(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> ref)</pre> |
| <div class="block">Returns whether an expression is constant.</div> |
| </li> |
| </ul> |
| <a name="gatherExpr-org.apache.calcite.rex.RexNode-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>gatherExpr</h4> |
| <pre>public <a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> gatherExpr(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> expr)</pre> |
| </li> |
| </ul> |
| <a name="getSourceField-int-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getSourceField</h4> |
| <pre>public int getSourceField(int outputOrdinal)</pre> |
| <div class="block">Returns the input field that an output field is populated from, or -1 if |
| it is populated from an expression.</div> |
| </li> |
| </ul> |
| <a name="isPermutation--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>isPermutation</h4> |
| <pre>public boolean isPermutation()</pre> |
| <div class="block">Returns whether this program is a permutation of its inputs.</div> |
| </li> |
| </ul> |
| <a name="getPermutation--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getPermutation</h4> |
| <pre>public <a href="../../../../org/apache/calcite/util/Permutation.html" title="class in org.apache.calcite.util">Permutation</a> getPermutation()</pre> |
| <div class="block">Returns a permutation, if this program is a permutation, otherwise null.</div> |
| </li> |
| </ul> |
| <a name="getCorrelVariableNames--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getCorrelVariableNames</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>> getCorrelVariableNames()</pre> |
| <div class="block">Returns the set of correlation variables used (read) by this program.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>set of correlation variable names</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="isNormalized-org.apache.calcite.util.Litmus-org.apache.calcite.rex.RexBuilder-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>isNormalized</h4> |
| <pre>public boolean isNormalized(<a href="../../../../org/apache/calcite/util/Litmus.html" title="interface in org.apache.calcite.util">Litmus</a> litmus, |
| <a href="../../../../org/apache/calcite/rex/RexBuilder.html" title="class in org.apache.calcite.rex">RexBuilder</a> rexBuilder)</pre> |
| <div class="block">Returns whether this program is in canonical form.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>litmus</code> - What to do if an error is detected (program is not in |
| canonical form)</dd> |
| <dd><code>rexBuilder</code> - Rex builder</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>whether in canonical form</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="normalize-org.apache.calcite.rex.RexBuilder-org.apache.calcite.rex.RexSimplify-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>normalize</h4> |
| <pre>public <a href="../../../../org/apache/calcite/rex/RexProgram.html" title="class in org.apache.calcite.rex">RexProgram</a> normalize(<a href="../../../../org/apache/calcite/rex/RexBuilder.html" title="class in org.apache.calcite.rex">RexBuilder</a> rexBuilder, |
| <a href="../../../../org/apache/calcite/rex/RexSimplify.html" title="class in org.apache.calcite.rex">RexSimplify</a> simplify)</pre> |
| <div class="block">Creates a simplified/normalized copy of this program.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>rexBuilder</code> - Rex builder</dd> |
| <dd><code>simplify</code> - Simplifier to simplify (in addition to normalizing), |
| or null to not simplify</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Normalized program</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="normalize-org.apache.calcite.rex.RexBuilder-boolean-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>normalize</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a> |
| public <a href="../../../../org/apache/calcite/rex/RexProgram.html" title="class in org.apache.calcite.rex">RexProgram</a> normalize(<a href="../../../../org/apache/calcite/rex/RexBuilder.html" title="class in org.apache.calcite.rex">RexBuilder</a> rexBuilder, |
| boolean simplify)</pre> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span> </div> |
| </li> |
| </ul> |
| <a name="getPartialMapping-int-"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>getPartialMapping</h4> |
| <pre>public <a href="../../../../org/apache/calcite/util/mapping/Mappings.TargetMapping.html" title="interface in org.apache.calcite.util.mapping">Mappings.TargetMapping</a> getPartialMapping(int inputFieldCount)</pre> |
| <div class="block">Returns a partial mapping of a set of project expressions. |
| |
| <p>The mapping is an inverse function. |
| Every target has a source field, but |
| a source might have 0, 1 or more targets. |
| Project expressions that do not consist of |
| a mapping are ignored.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>inputFieldCount</code> - Number of input fields</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Mapping of a set of project expressions, never null</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
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| <li>Summary: </li> |
| <li>Nested | </li> |
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