private static String getFunctionType(ParametricFunction function) {
if (function.isAggregate()) {
return "aggregate";
}
if (function.isWindow()) {
return "window";
}
return "scalar";
}
private InternalTable buildFunctions() {
InternalTable.Builder table =
InternalTable.builder(informationSchemaTableColumns(TABLE_INTERNAL_FUNCTIONS));
for (ParametricFunction function : metadata.listFunctions()) {
if (function.isApproximate()) {
continue;
}
table.add(
function.getSignature().getName(),
Joiner.on(", ").join(function.getSignature().getArgumentTypes()),
function.getSignature().getReturnType().toString(),
getFunctionType(function),
function.isDeterministic(),
nullToEmpty(function.getDescription()));
}
return table.build();
}