What is the filter matching mode for global filter(rather than a separate column filter, which defaults to "startsWith") and how to change it?
I ask that when I use a global filter with a matching mode set to "startsWith" in all my columns, I still get values with a "contains" filter mode. See screenshot below.

I should not get rows other than the first row, since I specified "startsWith" in all columns.
Here is my datatable,
<h:form id="countryTable">
<p:dataTable rowKey="" value="#{countryBean.countriesList}"
var="country" selection="#{countryBean.selectedCountries}"
styleClass="data-table-style" widgetVar="countryTableWVar"
filteredValue="#{countryBean.filteredCountries}">
<f:facet name="header">
<div class="align-left">
<p:outputPanel>
<h:outputText value="Search all fields:" />
<p:inputText id="globalFilter" onkeyup="countryTableWVar.filter();"
style="width:150px" />
</p:outputPanel>
</div>
</f:facet>
<p:column selectionMode="multiple" style="width:2%;" />
<p:column headerText="Numeric Code" filterMatchMode="startsWith"
filterStyle="display:none" filterBy="numericCode">
<h:outputText value="#{country.numericCode}"></h:outputText>
</p:column>
<p:column headerText="Alpha_2 Code" filterMatchMode="startsWith"
filterStyle="display:none" filterBy="alpha2">
<h:outputText value="#{country.alpha2}"></h:outputText>
</p:column>
<p:column headerText="Alpha_3 Code" filterMatchMode="startsWith"
filterStyle="display:none" filterBy="alpha3">
<h:outputText value="#{country.alpha3}"></h:outputText>
</p:column>
<p:column headerText="Name" filterMatchMode="startsWith"
filterStyle="display:none" filterBy="name">
<h:outputText value="#{country.name}"></h:outputText>
</p:column>
</p:dataTable>
</h:form>
How to change global global filter mapping mode?