ogc:PropertyIsLike

For Sql like:

 `A_STATUS` like '%O_MA%' or `A_STATUS` like '%ARNING'

Use this filter:

 <ogc:Filter>
        <ogc:Or>
            <ogc:PropertyIsLike wildCard="*" singleChar="#" escapeChar="!">
                <ogc:PropertyName>A_STATUS</ogc:PropertyName>
                <ogc:Literal>*O#MA*</ogc:Literal>
            </ogc:PropertyIsLike>
            <ogc:PropertyIsLike wildCard="*" singleChar="#" escapeChar="!">
                <ogc:PropertyName>A_STATUS</ogc:PropertyName>
                <ogc:Literal>*ARNING</ogc:Literal>
            </ogc:PropertyIsLike>
        </ogc:Or>
    </ogc:Filter>