What should be indexed?

Question

Given the following queryplan:
<XQuery>
<FunctionDefinition name="{http://architecturaldatasystems.com}:makeMfgHeader">
<DOMConstructor type="element">
<Name>
<Sequence>
<AnyAtomicTypeConstructor value="mfg" typeuri="http://www.w3.org/2001/XMLSchema" typename="QName"/>
</Sequence>
</Name>
<Attributes>
<DOMConstructor type="attribute">
<Name>
<Sequence>
<AnyAtomicTypeConstructor value="img" typeuri="http://www.w3.org/2001/XMLSchema" typename="QName"/>
</Sequence>
</Name>
<Children>
<DbXmlNav>
<Variable name="m"/>
<DbXmlStep axis="attribute" name="img" nodeType="attribute">
<RQPlan>P(mfg.@img)</RQPlan>
</DbXmlStep>
<Function name="{http://www.w3.org/2005/xpath-functions}:string"/>
</DbXmlNav>
</Children>
</DOMConstructor>
<DOMConstructor type="attribute">
<Name>
<Sequence>
<AnyAtomicTypeConstructor value="mfgID" typeuri="http://www.w3.org/2001/XMLSchema" typename="QName"/>
</Sequence>
</Name>
<Children>
<DbXmlNav>
<Variable name="m"/>
<DbXmlStep axis="attribute" name="mfgID" nodeType="attribute">
<RQPlan>P(mfg.@mfgID)</RQPlan>
</DbXmlStep>
<Function name="{http://www.w3.org/2005/xpath-functions}:string"/>
</DbXmlNav>
</Children>
</DOMConstructor>
<DOMConstructor type="attribute">
<Name>
<Sequence>
<AnyAtomicTypeConstructor value="name" typeuri="http://www.w3.org/2001/XMLSchema" typename="QName"/>
</Sequence>
</Name>
<Children>
<DbXmlNav>
<Variable name="m"/>
<DbXmlStep axis="attribute" name="name" nodeType="attribute">
<RQPlan>P(mfg.@name)</RQPlan>
</DbXmlStep>
<Function name="{http://www.w3.org/2005/xpath-functions}:string"/>
</DbXmlNav>
</Children>
</DOMConstructor>
</Attributes>
</DOMConstructor>
</FunctionDefinition>
<DOMConstructor type="element">
<Name>
<Sequence>
<AnyAtomicTypeConstructor value="result" typeuri="http://www.w3.org/2001/XMLSchema" typename="QName"/>
</Sequence>
</Name>
<Children>
<FLWOR>
<ForBinding name="mfg">
<DbXmlNav>
<QueryPlanFunction result="collection" container="pmcatalog.dbxml">
<OQPlan>n(V(node-element-substring-string,keyword,substring,'windows'),V(node-element-substring-string,keyword,substring,'pella'))</OQPlan>
</QueryPlanFunction>
<DbXmlStep axis="child" name="pmcatalog" nodeType="element"/>
<DbXmlStep axis="child" name="manufacturer" nodeType="element"/>
<DbXmlStep axis="child" name="mfg" nodeType="element"/>
</DbXmlNav>
<Where>
<SomeFLWOR>
<ForBinding name="pmg">
<DocumentOrder>
<DbXmlNav>
<Variable name="mfg"/>
<DbXmlStep axis="child" name="pmdata" nodeType="element"/>
<DbXmlStep axis="child" name="pmgroup" nodeType="element"/>
</DbXmlNav>
</DocumentOrder>
</ForBinding>
<Operator name="and">
<DbXmlNav>
<Variable name="pmg"/>
<DbXmlContains join="child" name="keyword" nodeType="element">
<OQPlan>V(node-element-substring-string,keyword,substring,'windows')</OQPlan>
<Sequence>
<AnyAtomicTypeConstructor value="windows" typeuri="http://www.w3.org/2001/XMLSchema" typename="string"/>
</Sequence>
</DbXmlContains>
</DbXmlNav>
<DbXmlNav>
<Variable name="pmg"/>
<DbXmlContains join="child" name="keyword" nodeType="element">
<OQPlan>V(node-element-substring-string,keyword,substring,'pella')</OQPlan>
<Sequence>
<AnyAtomicTypeConstructor value="pella" typeuri="http://www.w3.org/2001/XMLSchema" typename="string"/>
</Sequence>
</DbXmlContains>
</DbXmlNav>
</Operator>
</SomeFLWOR>
</Where>
</ForBinding>
<UserFunction name="{http://architecturaldatasystems.com}:makeMfgHeader">
<Binding name="{}:m">
<Variable name="mfg"/>
</Binding>
</UserFunction>
</FLWOR>
</Children>
</DOMConstructor>
</XQuery>
Is there any method to read this to determine what should be indexed?
currently I have :
Index: node-element-substring-string for node {}:keyword
Index: node-element-equality-string for node {}:name
I don't want to index that which does not need to be indexed :)
I can provide the xsd file if needed -

Answer 1

Walt,
There isn't enough information here. What is the query itself, and what behavior are you seeing? The indexes you have are definitely getting used but something else may be causing slowness if that's what you see.
Regards,
George