oak-core/src/main/java/org/apache/jackrabbit/oak/query/ast/UpperCaseImpl.java [128:138]:
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    public OrderEntry getOrderEntry(SelectorImpl s, OrderingImpl o) {
        String fn = getFunction(s);
        if (fn != null) {
            return new OrderEntry(
                QueryConstants.FUNCTION_RESTRICTION_PREFIX + fn,                     
                Type.STRING, 
                o.isDescending() ? 
                OrderEntry.Order.DESCENDING : OrderEntry.Order.ASCENDING);
        }
        return null;
    }    
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oak-core/src/main/java/org/apache/jackrabbit/oak/query/ast/LowerCaseImpl.java [142:152]:
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    public OrderEntry getOrderEntry(SelectorImpl s, OrderingImpl o) {
        String fn = getFunction(s);
        if (fn != null) {
            return new OrderEntry(
                QueryConstants.FUNCTION_RESTRICTION_PREFIX + fn,                     
                Type.STRING, 
                o.isDescending() ? 
                OrderEntry.Order.DESCENDING : OrderEntry.Order.ASCENDING);
        }
        return null;
    }
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oak-core/src/main/java/org/apache/jackrabbit/oak/query/ast/FirstImpl.java [127:137]:
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    public OrderEntry getOrderEntry(SelectorImpl s, OrderingImpl o) {
        String fn = getFunction(s);
        if (fn != null) {
            return new OrderEntry(
                QueryConstants.FUNCTION_RESTRICTION_PREFIX + fn,
                Type.STRING,
                o.isDescending() ?
                OrderEntry.Order.DESCENDING : OrderEntry.Order.ASCENDING);
        }
        return null;
    }
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oak-core/src/main/java/org/apache/jackrabbit/oak/query/ast/CoalesceImpl.java [131:141]:
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    public OrderEntry getOrderEntry(SelectorImpl s, OrderingImpl o) {
        String fn = getFunction(s);
        if (fn != null) {
            return new OrderEntry(
                QueryConstants.FUNCTION_RESTRICTION_PREFIX + fn,
                Type.STRING,
                o.isDescending() ?
                OrderEntry.Order.DESCENDING : OrderEntry.Order.ASCENDING);
        }
        return null;
    }
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