How to use

CreateFunctionStatement

in

org.apache.asterix.lang.common.statement

@Override
public Void visit(CreateFunctionStatement cfs, Integer step) throws CompilationException {
  out.print(skip(step) + CREATE + " function ");
  out.print(generateIfNotExists(cfs.getIfNotExists()));
  out.print(
      this.generateFullName(cfs.getFunctionSignature().getNamespace(), cfs.getFunctionSignature().getName()));
  out.print("(");
  printDelimitedStrings(cfs.getParamList(), COMMA);
  out.println(") {");
  out.println(cfs.getFunctionBody());
  out.println("}" + SEMICOLON);
  out.println();
  return null;
}

protected void handleCreateFunctionStatement(MetadataProvider metadataProvider, Statement stmt) throws Exception {
  CreateFunctionStatement cfs = (CreateFunctionStatement) stmt;
  SourceLocation sourceLoc = cfs.getSourceLocation();
  FunctionSignature signature = cfs.getFunctionSignature();
  String dataverse = getActiveDataverseName(signature.getNamespace());
  signature.setNamespace(dataverse);
    Query wrappedQuery = new Query(false);
    wrappedQuery.setSourceLocation(sourceLoc);
    wrappedQuery.setBody(cfs.getFunctionBodyExpression());
    wrappedQuery.setTopLevel(false);
    List<VarIdentifier> paramVars = new ArrayList<>();
    for (String v : cfs.getParamList()) {
      paramVars.add(new VarIdentifier(v));
        rewriterFactory.createQueryRewriter(), cfs.getFunctionBodyExpression(), metadataProvider);
    Function function = new Function(signature, cfs.getParamList(), Function.RETURNTYPE_VOID,
        cfs.getFunctionBody(), getFunctionLanguage(), FunctionKind.SCALAR.toString(), dependencies);
    MetadataManager.INSTANCE.addFunction(mdTxnCtx, function);

final public CreateFunctionStatement FunctionSpecification() throws ParseException, ParseException {
FunctionSignature signature;
boolean ifNotExists = false;
List<VarIdentifier> paramList = new ArrayList<VarIdentifier>();
String functionBody;
VarIdentifier var = null;
Expression functionBodyExpr;
Token beginPos;
Token endPos;
FunctionName fctName = null;
createNewScope();
 jj_consume_token(FUNCTION);
 fctName = FunctionName();
 ifNotExists = IfNotExists();
 paramList = ParameterList();
 jj_consume_token(LEFTBRACE);
  beginPos = token;
 functionBodyExpr = Expression();
 jj_consume_token(RIGHTBRACE);
  endPos = token;
  functionBody = extractFragment(beginPos.beginLine, beginPos.beginColumn, endPos.beginLine, endPos.beginColumn);
  // TODO use fctName.library
  signature = new FunctionSignature(fctName.dataverse, fctName.function, paramList.size());
  getCurrentScope().addFunctionDescriptor(signature, false);
  removeCurrentScope();
  {if (true) return new CreateFunctionStatement(signature, paramList, functionBody, functionBodyExpr, ifNotExists);}
 throw new Error("Missing return statement in function");
}

final public CreateFunctionStatement FunctionSpecification() throws ParseException, ParseException {
FunctionSignature signature;
boolean ifNotExists = false;
List<VarIdentifier> paramList = new ArrayList<VarIdentifier>();
String functionBody;
VarIdentifier var = null;
Expression functionBodyExpr;
Token beginPos;
Token endPos;
FunctionName fctName = null;
createNewScope();
 jj_consume_token(FUNCTION);
 fctName = FunctionName();
 ifNotExists = IfNotExists();
 paramList = ParameterList();
 jj_consume_token(LEFTBRACE);
  beginPos = token;
 functionBodyExpr = Expression();
 jj_consume_token(RIGHTBRACE);
  endPos = token;
  functionBody = extractFragment(beginPos.beginLine, beginPos.beginColumn, endPos.beginLine, endPos.beginColumn);
  // TODO use fctName.library
  signature = new FunctionSignature(fctName.dataverse, fctName.function, paramList.size());
  getCurrentScope().addFunctionDescriptor(signature, false);
  removeCurrentScope();
  {if (true) return new CreateFunctionStatement(signature, paramList, functionBody, functionBodyExpr, ifNotExists);}
 throw new Error("Missing return statement in function");
}

 removeCurrentScope();
 defaultDataverse = currentDataverse;
 CreateFunctionStatement stmt = new CreateFunctionStatement(signature, paramList, functionBody, functionBodyExpr, ifNotExists);
 {if (true) return addSourceLocation(stmt, startStmtToken);}
throw new Error("Missing return statement in function");