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 <div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.calcite.sql.type</a></div>
 <h2 title="Class SqlTypeUtil" class="title">Class SqlTypeUtil</h2>
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 <li>java.lang.Object</li>
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 <pre>public abstract class <span class="typeNameLabel">SqlTypeUtil</span>
 extends java.lang.Object</pre>
 <div class="block">Contains utility methods used during SQL validation or type derivation.</div>
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 <caption><span>Constructors</span><span class="tabEnd">&nbsp;</span></caption>
 <tr>
 <th class="colFirst" scope="col">Constructor</th>
 <th class="colLast" scope="col">Description</th>
 </tr>
 <tr class="altColor">
 <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E()">SqlTypeUtil</a></span>()</code></th>
 <td class="colLast">&nbsp;</td>
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 <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t6" class="tableTab"><span><a href="javascript:show(32);">Deprecated Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
 <tr>
 <th class="colFirst" scope="col">Modifier and Type</th>
 <th class="colSecond" scope="col">Method</th>
 <th class="colLast" scope="col">Description</th>
 </tr>
 <tr id="i0" class="altColor">
 <td class="colFirst"><code>static <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#addCharsetAndCollation(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataTypeFactory)">addCharsetAndCollation</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type,
                       <a href="../../rel/type/RelDataTypeFactory.html" title="interface in org.apache.calcite.rel.type">RelDataTypeFactory</a>&nbsp;typeFactory)</code></th>
 <td class="colLast">
 <div class="block">Adds collation and charset to a character type, returns other types
  unchanged.</div>
 </td>
 </tr>
 <tr id="i1" class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#allNullable(java.util.List)">allNullable</a></span>&#8203;(java.util.List&lt;<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&gt;&nbsp;types)</code></th>
 <td class="colLast">
 <div class="block">Returns whether all of array of types are nullable.</div>
 </td>
 </tr>
 <tr id="i2" class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#areCharacterSetsMismatched(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType)">areCharacterSetsMismatched</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;t1,
                           <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;t2)</code></th>
 <td class="colLast">
 <div class="block">Determines whether two types both have different character sets.</div>
 </td>
 </tr>
 <tr id="i3" class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#areSameFamily(java.lang.Iterable)">areSameFamily</a></span>&#8203;(java.lang.Iterable&lt;<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&gt;&nbsp;types)</code></th>
 <td class="colLast">
 <div class="block">Returns whether all types in a collection have the same family, as
  determined by <a href="#isSameFamily(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType)"><code>isSameFamily(RelDataType, RelDataType)</code></a>.</div>
 </td>
 </tr>
 <tr id="i4" class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#canAssignFrom(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType)">canAssignFrom</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;toType,
              <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;fromType)</code></th>
 <td class="colLast">
 <div class="block">Tests whether a value can be assigned to a site.</div>
 </td>
 </tr>
 <tr id="i5" class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#canCastFrom(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType,boolean)">canCastFrom</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;toType,
            <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;fromType,
            boolean&nbsp;coerce)</code></th>
 <td class="colLast">
 <div class="block">Compares two types and returns true if fromType can be cast to toType.</div>
 </td>
 </tr>
 <tr id="i6" class="altColor">
 <td class="colFirst"><code>private static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#canConvertStringInCompare(org.apache.calcite.rel.type.RelDataTypeFamily)">canConvertStringInCompare</a></span>&#8203;(<a href="../../rel/type/RelDataTypeFamily.html" title="interface in org.apache.calcite.rel.type">RelDataTypeFamily</a>&nbsp;family)</code></th>
 <td class="colLast">
 <div class="block">Returns whether a character data type can be implicitly converted to a
  given family in a compare operation.</div>
 </td>
 </tr>
 <tr id="i7" class="rowColor">
 <td class="colFirst"><code>static int</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#comparePrecision(int,int)">comparePrecision</a></span>&#8203;(int&nbsp;p0,
                 int&nbsp;p1)</code></th>
 <td class="colLast">
 <div class="block">Returns whether a precision is greater or equal than another,
  treating <a href="../../rel/type/RelDataType.html#PRECISION_NOT_SPECIFIED"><code>RelDataType.PRECISION_NOT_SPECIFIED</code></a> as infinity.</div>
 </td>
 </tr>
 <tr id="i8" class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#containsNullable(java.util.List)">containsNullable</a></span>&#8203;(java.util.List&lt;<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&gt;&nbsp;types)</code></th>
 <td class="colLast">
 <div class="block">Returns whether one or more of an array of types is nullable.</div>
 </td>
 </tr>
 <tr id="i9" class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#containsNullable(org.apache.calcite.rel.type.RelDataType)">containsNullable</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">
 <div class="block">Determines whether a type or any of its fields (if a structured type) are
  nullable.</div>
 </td>
 </tr>
 <tr id="i10" class="altColor">
 <td class="colFirst"><code>static <a href="../SqlDataTypeSpec.html" title="class in org.apache.calcite.sql">SqlDataTypeSpec</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#convertTypeToSpec(org.apache.calcite.rel.type.RelDataType)">convertTypeToSpec</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">
 <div class="block">Converts an instance of RelDataType to an instance of SqlDataTypeSpec.</div>
 </td>
 </tr>
 <tr id="i11" class="rowColor">
 <td class="colFirst"><code>static <a href="../SqlDataTypeSpec.html" title="class in org.apache.calcite.sql">SqlDataTypeSpec</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#convertTypeToSpec(org.apache.calcite.rel.type.RelDataType,java.lang.String,int)">convertTypeToSpec</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type,
                  java.lang.String&nbsp;charSetName,
                  int&nbsp;maxPrecision)</code></th>
 <td class="colLast">
 <div class="block">Converts an instance of RelDataType to an instance of SqlDataTypeSpec.</div>
 </td>
 </tr>
 <tr id="i12" class="altColor">
 <td class="colFirst"><code>static <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#createArrayType(org.apache.calcite.rel.type.RelDataTypeFactory,org.apache.calcite.rel.type.RelDataType,boolean)">createArrayType</a></span>&#8203;(<a href="../../rel/type/RelDataTypeFactory.html" title="interface in org.apache.calcite.rel.type">RelDataTypeFactory</a>&nbsp;typeFactory,
                <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type,
                boolean&nbsp;nullable)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i13" class="rowColor">
 <td class="colFirst"><code>static <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#createEmptyStructType(org.apache.calcite.rel.type.RelDataTypeFactory)">createEmptyStructType</a></span>&#8203;(<a href="../../rel/type/RelDataTypeFactory.html" title="interface in org.apache.calcite.rel.type">RelDataTypeFactory</a>&nbsp;typeFactory)</code></th>
 <td class="colLast">
 <div class="block">Records a struct type with no fields.</div>
 </td>
 </tr>
 <tr id="i14" class="altColor">
 <td class="colFirst"><code>static <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#createMapType(org.apache.calcite.rel.type.RelDataTypeFactory,org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType,boolean)">createMapType</a></span>&#8203;(<a href="../../rel/type/RelDataTypeFactory.html" title="interface in org.apache.calcite.rel.type">RelDataTypeFactory</a>&nbsp;typeFactory,
              <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;keyType,
              <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;valueType,
              boolean&nbsp;nullable)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i15" class="rowColor">
 <td class="colFirst"><code>static <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#createMultisetType(org.apache.calcite.rel.type.RelDataTypeFactory,org.apache.calcite.rel.type.RelDataType,boolean)">createMultisetType</a></span>&#8203;(<a href="../../rel/type/RelDataTypeFactory.html" title="interface in org.apache.calcite.rel.type">RelDataTypeFactory</a>&nbsp;typeFactory,
                   <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type,
                   boolean&nbsp;nullable)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i16" class="altColor">
 <td class="colFirst"><code>static java.util.List&lt;<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&gt;</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#deriveAndCollectTypes(org.apache.calcite.sql.validate.SqlValidator,org.apache.calcite.sql.validate.SqlValidatorScope,java.util.List)">deriveAndCollectTypes</a></span>&#8203;(<a href="../validate/SqlValidator.html" title="interface in org.apache.calcite.sql.validate">SqlValidator</a>&nbsp;validator,
                      <a href="../validate/SqlValidatorScope.html" title="interface in org.apache.calcite.sql.validate">SqlValidatorScope</a>&nbsp;scope,
                      java.util.List&lt;<a href="../SqlNode.html" title="class in org.apache.calcite.sql">SqlNode</a>&gt;&nbsp;operands)</code></th>
 <td class="colLast">
 <div class="block">Iterates over all operands, derives their types, and collects them into
  a list.</div>
 </td>
 </tr>
 <tr id="i17" class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#equalAsStructSansNullability(org.apache.calcite.rel.type.RelDataTypeFactory,org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType,org.apache.calcite.sql.validate.SqlNameMatcher)">equalAsStructSansNullability</a></span>&#8203;(<a href="../../rel/type/RelDataTypeFactory.html" title="interface in org.apache.calcite.rel.type">RelDataTypeFactory</a>&nbsp;factory,
                             <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type1,
                             <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type2,
                             <a href="../validate/SqlNameMatcher.html" title="interface in org.apache.calcite.sql.validate">SqlNameMatcher</a>&nbsp;nameMatcher)</code></th>
 <td class="colLast">
 <div class="block">Returns whether two struct types are equal, ignoring nullability.</div>
 </td>
 </tr>
 <tr id="i18" class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#equalSansNullability(org.apache.calcite.rel.type.RelDataTypeFactory,org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType)">equalSansNullability</a></span>&#8203;(<a href="../../rel/type/RelDataTypeFactory.html" title="interface in org.apache.calcite.rel.type">RelDataTypeFactory</a>&nbsp;factory,
                     <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type1,
                     <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type2)</code></th>
 <td class="colLast">
 <div class="block">Returns whether two types are equal, ignoring nullability.</div>
 </td>
 </tr>
 <tr id="i19" class="rowColor">
 <td class="colFirst"><code>protected static <a href="../../rel/type/RelDataTypeFamily.html" title="interface in org.apache.calcite.rel.type">RelDataTypeFamily</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#family(org.apache.calcite.rel.type.RelDataType)">family</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i20" class="altColor">
 <td class="colFirst"><code>static int</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#findField(org.apache.calcite.rel.type.RelDataType,java.lang.String)">findField</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type,
          java.lang.String&nbsp;fieldName)</code></th>
 <td class="colLast">
 <div class="block">Returns the ordinal of a given field in a record type, or -1 if the field
  is not found.</div>
 </td>
 </tr>
 <tr id="i21" class="rowColor">
 <td class="colFirst"><code>private static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#flattenFields(org.apache.calcite.rel.type.RelDataTypeFactory,org.apache.calcite.rel.type.RelDataType,java.util.List,int%5B%5D)">flattenFields</a></span>&#8203;(<a href="../../rel/type/RelDataTypeFactory.html" title="interface in org.apache.calcite.rel.type">RelDataTypeFactory</a>&nbsp;typeFactory,
              <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type,
              java.util.List&lt;<a href="../../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>&gt;&nbsp;list,
              int[]&nbsp;flatteningMap)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i22" class="altColor">
 <td class="colFirst"><code>static <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#flattenRecordType(org.apache.calcite.rel.type.RelDataTypeFactory,org.apache.calcite.rel.type.RelDataType,int%5B%5D)">flattenRecordType</a></span>&#8203;(<a href="../../rel/type/RelDataTypeFactory.html" title="interface in org.apache.calcite.rel.type">RelDataTypeFactory</a>&nbsp;typeFactory,
                  <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;recordType,
                  int[]&nbsp;flatteningMap)</code></th>
 <td class="colLast">
 <div class="block">Flattens a record type by recursively expanding any fields which are
  themselves record types.</div>
 </td>
 </tr>
 <tr id="i23" class="rowColor">
 <td class="colFirst"><code>static int</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getMaxByteSize(org.apache.calcite.rel.type.RelDataType)">getMaxByteSize</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">
 <div class="block">Computes the maximum number of bytes required to represent a value of a
  type having user-defined precision.</div>
 </td>
 </tr>
 <tr id="i24" class="altColor">
 <td class="colFirst"><code>static <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getMaxPrecisionScaleDecimal(org.apache.calcite.rel.type.RelDataTypeFactory)">getMaxPrecisionScaleDecimal</a></span>&#8203;(<a href="../../rel/type/RelDataTypeFactory.html" title="interface in org.apache.calcite.rel.type">RelDataTypeFactory</a>&nbsp;factory)</code></th>
 <td class="colLast">
 <div class="block">Get decimal with max precision/scale for the current type system.</div>
 </td>
 </tr>
 <tr id="i25" class="rowColor">
 <td class="colFirst"><code>static long</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getMaxValue(org.apache.calcite.rel.type.RelDataType)">getMaxValue</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">
 <div class="block">Determines the maximum unscaled value of a numeric type</div>
 </td>
 </tr>
 <tr id="i26" class="altColor">
 <td class="colFirst"><code>static long</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getMinValue(org.apache.calcite.rel.type.RelDataType)">getMinValue</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">
 <div class="block">Determines the minimum unscaled value of a numeric type</div>
 </td>
 </tr>
 <tr id="i27" class="rowColor">
 <td class="colFirst"><code>static java.lang.String</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getNumericJavaClassName(org.apache.calcite.rel.type.RelDataType)">getNumericJavaClassName</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">
 <div class="block"><span class="deprecatedLabel">Deprecated.</span></div>
 </td>
 </tr>
 <tr id="i28" class="altColor">
 <td class="colFirst"><code>static java.lang.String</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getPrimitiveWrapperJavaClassName(org.apache.calcite.rel.type.RelDataType)">getPrimitiveWrapperJavaClassName</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">
 <div class="block"><span class="deprecatedLabel">Deprecated.</span></div>
 </td>
 </tr>
 <tr id="i29" class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#hasCharactor(org.apache.calcite.rel.type.RelDataType)">hasCharactor</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i30" class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#hasScale(org.apache.calcite.rel.type.RelDataType)">hasScale</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">
 <div class="block">Returns whether a type's scale is set.</div>
 </td>
 </tr>
 <tr id="i31" class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#inBooleanFamily(org.apache.calcite.rel.type.RelDataType)">inBooleanFamily</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i32" class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#inCharFamily(org.apache.calcite.rel.type.RelDataType)">inCharFamily</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i33" class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#inCharFamily(org.apache.calcite.sql.type.SqlTypeName)">inCharFamily</a></span>&#8203;(<a href="SqlTypeName.html" title="enum in org.apache.calcite.sql.type">SqlTypeName</a>&nbsp;typeName)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i34" class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#inCharOrBinaryFamilies(org.apache.calcite.rel.type.RelDataType)">inCharOrBinaryFamilies</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i35" class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#inSameFamily(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType)">inSameFamily</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;t1,
             <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;t2)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i36" class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#inSameFamilyOrNull(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType)">inSameFamilyOrNull</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;t1,
                   <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;t2)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i37" class="rowColor">
 <td class="colFirst"><code>private static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isAny(org.apache.calcite.rel.type.RelDataType)">isAny</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;t)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i38" class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isApproximateNumeric(org.apache.calcite.rel.type.RelDataType)">isApproximateNumeric</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i39" class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isArray(org.apache.calcite.rel.type.RelDataType)">isArray</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i40" class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isAtomic(org.apache.calcite.rel.type.RelDataType)">isAtomic</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i41" class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isBigint(org.apache.calcite.rel.type.RelDataType)">isBigint</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i42" class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isBinary(org.apache.calcite.rel.type.RelDataType)">isBinary</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i43" class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isBoolean(org.apache.calcite.rel.type.RelDataType)">isBoolean</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i44" class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isBoundedVariableWidth(org.apache.calcite.rel.type.RelDataType)">isBoundedVariableWidth</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i45" class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isCharacter(org.apache.calcite.rel.type.RelDataType)">isCharacter</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i46" class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isCharTypeComparable(java.util.List)">isCharTypeComparable</a></span>&#8203;(java.util.List&lt;<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&gt;&nbsp;argTypes)</code></th>
 <td class="colLast">
 <div class="block">Checks whether two types or more are char comparable.</div>
 </td>
 </tr>
 <tr id="i47" class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isCharTypeComparable(org.apache.calcite.sql.SqlCallBinding,java.util.List,boolean)">isCharTypeComparable</a></span>&#8203;(<a href="../SqlCallBinding.html" title="class in org.apache.calcite.sql">SqlCallBinding</a>&nbsp;binding,
                     java.util.List&lt;<a href="../SqlNode.html" title="class in org.apache.calcite.sql">SqlNode</a>&gt;&nbsp;operands,
                     boolean&nbsp;throwOnFailure)</code></th>
 <td class="colLast">
 <div class="block">Returns whether the operands to a call are char type-comparable.</div>
 </td>
 </tr>
 <tr id="i48" class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isComparable(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType)">isComparable</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type1,
             <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type2)</code></th>
 <td class="colLast">
 <div class="block">Returns whether two types are comparable.</div>
 </td>
 </tr>
 <tr id="i49" class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isDate(org.apache.calcite.rel.type.RelDataType)">isDate</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i50" class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isDatetime(org.apache.calcite.rel.type.RelDataType)">isDatetime</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i51" class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isDecimal(org.apache.calcite.rel.type.RelDataType)">isDecimal</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i52" class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isDouble(org.apache.calcite.rel.type.RelDataType)">isDouble</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i53" class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isExactNumeric(org.apache.calcite.rel.type.RelDataType)">isExactNumeric</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i54" class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isFlat(org.apache.calcite.rel.type.RelDataType)">isFlat</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">
 <div class="block">Returns whether a type is flat.</div>
 </td>
 </tr>
 <tr id="i55" class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isInterval(org.apache.calcite.rel.type.RelDataType)">isInterval</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i56" class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isIntType(org.apache.calcite.rel.type.RelDataType)">isIntType</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i57" class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isJavaPrimitive(org.apache.calcite.rel.type.RelDataType)">isJavaPrimitive</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">
 <div class="block"><span class="deprecatedLabel">Deprecated.</span></div>
 </td>
 </tr>
 <tr id="i58" class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isLob(org.apache.calcite.rel.type.RelDataType)">isLob</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i59" class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isMap(org.apache.calcite.rel.type.RelDataType)">isMap</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i60" class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isNull(org.apache.calcite.rel.type.RelDataType)">isNull</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i61" class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isNumeric(org.apache.calcite.rel.type.RelDataType)">isNumeric</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i62" class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isOfSameTypeName(java.util.Collection,org.apache.calcite.rel.type.RelDataType)">isOfSameTypeName</a></span>&#8203;(java.util.Collection&lt;<a href="SqlTypeName.html" title="enum in org.apache.calcite.sql.type">SqlTypeName</a>&gt;&nbsp;typeNames,
                 <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">
 <div class="block">Returns true if any element in <code>typeNames</code> matches
  type.getSqlTypeName().</div>
 </td>
 </tr>
 <tr id="i63" class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isOfSameTypeName(org.apache.calcite.sql.type.SqlTypeName,org.apache.calcite.rel.type.RelDataType)">isOfSameTypeName</a></span>&#8203;(<a href="SqlTypeName.html" title="enum in org.apache.calcite.sql.type">SqlTypeName</a>&nbsp;typeName,
                 <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">
 <div class="block">Returns typeName.equals(type.getSqlTypeName()).</div>
 </td>
 </tr>
 <tr id="i64" class="altColor">
 <td class="colFirst"><code>private static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isSameFamily(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType)">isSameFamily</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type1,
             <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type2)</code></th>
 <td class="colLast">
 <div class="block">Returns whether two types are scalar types of the same family, or struct types whose fields
  are pairwise of the same family.</div>
 </td>
 </tr>
 <tr id="i65" class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isString(org.apache.calcite.rel.type.RelDataType)">isString</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i66" class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isTimestamp(org.apache.calcite.rel.type.RelDataType)">isTimestamp</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i67" class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isUnicode(org.apache.calcite.rel.type.RelDataType)">isUnicode</a></span>&#8203;(<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type)</code></th>
 <td class="colLast">
 <div class="block">Checks whether a type represents Unicode character data.</div>
 </td>
 </tr>
 <tr id="i68" class="altColor">
 <td class="colFirst"><code>static <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#leastRestrictiveForComparison(org.apache.calcite.rel.type.RelDataTypeFactory,org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType)">leastRestrictiveForComparison</a></span>&#8203;(<a href="../../rel/type/RelDataTypeFactory.html" title="interface in org.apache.calcite.rel.type">RelDataTypeFactory</a>&nbsp;typeFactory,
                              <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type1,
                              <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type2)</code></th>
 <td class="colLast">
 <div class="block">Returns the least restrictive type T, such that a value of type T can be
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 <td class="colLast">
 <div class="block">Recreates a given RelDataType with nullability iff any of the param
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 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#makeNullableIfOperandsAre(org.apache.calcite.sql.validate.SqlValidator,org.apache.calcite.sql.validate.SqlValidatorScope,org.apache.calcite.sql.SqlCall,org.apache.calcite.rel.type.RelDataType)">makeNullableIfOperandsAre</a></span>&#8203;(<a href="../validate/SqlValidator.html" title="interface in org.apache.calcite.sql.validate">SqlValidator</a>&nbsp;validator,
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 <dd><code>operands</code> - Operands to check for compatibility; usually the
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 <dd><code>throwOnFailure</code> - Whether to throw an exception on failure</dd>
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 <div class="block">Promotes a type to a row type (does nothing if it already is one).</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>type</code> - type to be promoted</dd>
 <dd><code>fieldName</code> - name to give field in row type; null for default of
                   "ROW_VALUE"</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>row type</dd>
 </dl>
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 </ul>
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 <div class="block">Recreates a given RelDataType with nullability iff any of the operands
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 <div class="block">Recreates a given RelDataType with nullability iff any of the param
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 <div class="block">Determines whether a type or any of its fields (if a structured type) are
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  differing modifiers. For example, VARCHAR(1) and VARCHAR(10) are
  considered the same, while VARCHAR(1) and CHAR(1) are considered
  different. Likewise, VARCHAR(1) MULTISET and VARCHAR(10) MULTISET are
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 <div class="block">Computes the maximum number of bytes required to represent a value of a
  type having user-defined precision. This computation assumes no overhead
  such as length indicators and NUL-terminators. Complex types for which
  multiple representations are possible (e.g. DECIMAL or TIMESTAMP) return
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 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>type</code> - type for which to compute storage</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>maximum bytes, or 0 for a fixed-width type or type with unknown
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 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>type</code> - a numeric type</dd>
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 <div class="block">Determines the maximum unscaled value of a numeric type</div>
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 <div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span></div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>true if type has a representation as a Java primitive (ignoring
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 <div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span></div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>class name of the wrapper for the primitive data type.</dd>
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 <div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span></div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>class name of the numeric data type.</dd>
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 <div class="block">Tests whether a value can be assigned to a site.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>toType</code> - type of the target site</dd>
 <dd><code>fromType</code> - type of the source value</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>true iff assignable</dd>
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 <div class="block">Determines whether two types both have different character sets. If one
  or the other type has no character set (e.g. in cast from INT to
  VARCHAR), that is not a mismatch.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>t1</code> - first type</dd>
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 <dt><span class="returnLabel">Returns:</span></dt>
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  <p>REVIEW jvs 17-Dec-2004: the coerce param below shouldn't really be
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  <a href="SqlTypeAssignmentRules.html" title="class in org.apache.calcite.sql.type"><code>SqlTypeAssignmentRules</code></a>) should go away.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>toType</code> - target of assignment</dd>
 <dd><code>fromType</code> - source of assignment</dd>
 <dd><code>coerce</code> - if true, the SQL rules for CAST are used; if false, the
                  rules are similar to Java; e.g. you can't assign short x =
                  (int) y, and you can't assign int x = (String) z.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>true iff cast is legal</dd>
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 <div class="block">Flattens a record type by recursively expanding any fields which are
  themselves record types. For each record type, a representative null
  value field is also prepended (with state NULL for a null value and FALSE
  for non-null), and all component types are asserted to be nullable, since
  SQL doesn't allow NOT NULL to be specified on attributes.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>typeFactory</code> - factory which should produced flattened type</dd>
 <dd><code>recordType</code> - type with possible nesting</dd>
 <dd><code>flatteningMap</code> - if non-null, receives map from unflattened ordinal
                       to flattened ordinal (must have length at least
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 <dt><span class="returnLabel">Returns:</span></dt>
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 <dd><code>charSetName</code> - charSet name</dd>
 <dd><code>maxPrecision</code> - The max allowed precision.</dd>
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 <dt><span class="returnLabel">Returns:</span></dt>
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 <div class="block">Adds collation and charset to a character type, returns other types
  unchanged.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>type</code> - Type</dd>
 <dd><code>typeFactory</code> - Type factory</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>Type with added charset and collation, or unchanged type if it is
  not a char type.</dd>
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                                            <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type2)</pre>
 <div class="block">Returns whether two types are equal, ignoring nullability.

  <p>They need not come from the same factory.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>factory</code> - Type factory</dd>
 <dd><code>type1</code> - First type</dd>
 <dd><code>type2</code> - Second type</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>whether types are equal, ignoring nullability</dd>
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                                                    <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type1,
                                                    <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type2,
                                                    <a href="../validate/SqlNameMatcher.html" title="interface in org.apache.calcite.sql.validate">SqlNameMatcher</a>&nbsp;nameMatcher)</pre>
 <div class="block">Returns whether two struct types are equal, ignoring nullability.

  <p>They do not need to come from the same factory.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>factory</code> - Type factory</dd>
 <dd><code>type1</code> - First type</dd>
 <dd><code>type2</code> - Second type</dd>
 <dd><code>nameMatcher</code> - Name matcher used to compare the field names</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>Whether types are equal, ignoring nullability</dd>
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                             java.lang.String&nbsp;fieldName)</pre>
 <div class="block">Returns the ordinal of a given field in a record type, or -1 if the field
  is not found.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>type</code> - Record type</dd>
 <dd><code>fieldName</code> - Name of field</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>Ordinal of field</dd>
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                                                        java.util.List&lt;? extends java.lang.Number&gt;&nbsp;requiredFields)</pre>
 <div class="block">Selects data types of the specified fields from an input row type.
  This is useful when identifying data types of a function that is going
  to operate on inputs that are specified as field ordinals (e.g.
  aggregate calls).</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>rowType</code> - input row type</dd>
 <dd><code>requiredFields</code> - ordinals of the projected fields</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>list of data types that are requested by requiredFields</dd>
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 <div class="block">Records a struct type with no fields.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>typeFactory</code> - Type factory</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>Struct type with no fields</dd>
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 <div class="block">Returns whether a type is flat. It is not flat if it is a record type that
  has one or more fields that are themselves record types.</div>
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                                    <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type2)</pre>
 <div class="block">Returns whether two types are comparable. They need to be scalar types of
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 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>type1</code> - First type</dd>
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 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>Whether types are comparable</dd>
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                                                         <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;type2)</pre>
 <div class="block">Returns the least restrictive type T, such that a value of type T can be
  compared with values of type <code>type0</code> and <code>type1</code> using
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 <div class="block">Returns whether all types in a collection have the same family, as
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 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>true if all types are of the same family</dd>
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 <div class="block">Returns whether two types are scalar types of the same family, or struct types whose fields
  are pairwise of the same family.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>type1</code> - First type</dd>
 <dd><code>type2</code> - Second type</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>Whether types have the same family</dd>
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 <div class="block">Returns whether a character data type can be implicitly converted to a
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 <div class="block">Checks whether a type represents Unicode character data.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>type</code> - type to test</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
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 <dl>
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 <dl>
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 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>true if type is CHARACTER</dd>
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 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>true if the type is a CHARACTER or contains a CHARACTER type</dd>
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 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>true if type is STRING</dd>
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 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>true if type is BOOLEAN</dd>
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 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>true if type is BINARY</dd>
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 <dl>
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 <div class="block">Get decimal with max precision/scale for the current type system.</div>
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