public void aggregateFunction(CompiledValue expr, int aggFuncType, boolean distinctOnly) {
    push(new CompiledAggregateFunction(expr, aggFuncType, distinctOnly));
  }
Processes import statements only. This compiler instance remembers the imports and can be used
to compile other strings with this context info
geode-core/src/main/java/org/apache/geode/cache/query/internal/QCompiler.java