Program: 54347
Project: 54347
Buggy source:
@Override public Stream<Function<DSLContext,String>> streamDocPartTableIndexesCreation(String schemaName,String tableName,TableRef tableRef,String foreignTableName){
  List<Function<DSLContext,String>> result=new ArrayList<>(4);
  if (!dbBackend.isOnDataInsertMode()) {
    String primaryKeyStatement=getAddDocPartTablePrimaryKeyStatement(schemaName,tableName,metaDataReadInterface.getPrimaryKeyInternalFields(tableRef));
    result.add((dsl) -> {
      sqlHelper.executeStatement(dsl,primaryKeyStatement,Context.ADD_UNIQUE_INDEX);
      return "String_Node_Str";
    }
);
  }
  if (!dbBackend.isOnDataInsertMode()) {
    String readIndexStatement=getCreateDocPartTableIndexStatement(schemaName,tableName,metaDataReadInterface.getReadInternalFields(tableRef));
    result.add((dsl) -> {
      sqlHelper.executeStatement(dsl,readIndexStatement,Context.CREATE_INDEX);
      return metaDataReadInterface.getReadInternalFields(tableRef).stream().map(f -> f.getName()).collect(Collectors.joining("String_Node_Str")) + "String_Node_Str";
    }
);
  }
  if (!dbBackend.isOnDataInsertMode()) {
    if (dbBackend.includeForeignKeys()) {
      String foreignKeyStatement=getAddDocPartTableForeignKeyStatement(schemaName,tableName,metaDataReadInterface.getReferenceInternalFields(tableRef),foreignTableName,metaDataReadInterface.getForeignInternalFields(tableRef));
      result.add((dsl) -> {
        sqlHelper.executeStatement(dsl,foreignKeyStatement,Context.ADD_FOREIGN_KEY);
        return metaDataReadInterface.getReferenceInternalFields(tableRef).stream().map(f -> f.getName()).collect(Collectors.joining("String_Node_Str")) + "String_Node_Str";
      }
);
    }
 else {
      if (!tableRef.isRoot() && !tableRef.getParent().get().isRoot()) {
        String foreignKeyIndexStatement=getCreateDocPartTableIndexStatement(schemaName,tableName,metaDataReadInterface.getReferenceInternalFields(tableRef));
        result.add((dsl) -> {
          sqlHelper.executeStatement(dsl,foreignKeyIndexStatement,Context.CREATE_INDEX);
          return metaDataReadInterface.getReferenceInternalFields(tableRef).stream().map(f -> f.getName()).collect(Collectors.joining("String_Node_Str")) + "String_Node_Str";
        }
);
      }
    }
  }
  return result.stream();
}

Fixed version (ground truth):
@Override public Stream<Function<DSLContext,String>> streamDocPartTableIndexesCreation(String schemaName,String tableName,TableRef tableRef,String foreignTableName){
  List<Function<DSLContext,String>> result=new ArrayList<>(4);
  if (!dbBackend.isOnDataInsertMode(schemaName)) {
    String primaryKeyStatement=getAddDocPartTablePrimaryKeyStatement(schemaName,tableName,metaDataReadInterface.getPrimaryKeyInternalFields(tableRef));
    result.add((dsl) -> {
      sqlHelper.executeStatement(dsl,primaryKeyStatement,Context.ADD_UNIQUE_INDEX);
      return "String_Node_Str";
    }
);
  }
  if (!dbBackend.isOnDataInsertMode(schemaName)) {
    String readIndexStatement=getCreateDocPartTableIndexStatement(schemaName,tableName,metaDataReadInterface.getReadInternalFields(tableRef));
    result.add((dsl) -> {
      sqlHelper.executeStatement(dsl,readIndexStatement,Context.CREATE_INDEX);
      return metaDataReadInterface.getReadInternalFields(tableRef).stream().map(f -> f.getName()).collect(Collectors.joining("String_Node_Str")) + "String_Node_Str";
    }
);
  }
  if (!dbBackend.isOnDataInsertMode(schemaName)) {
    if (dbBackend.includeForeignKeys()) {
      String foreignKeyStatement=getAddDocPartTableForeignKeyStatement(schemaName,tableName,metaDataReadInterface.getReferenceInternalFields(tableRef),foreignTableName,metaDataReadInterface.getForeignInternalFields(tableRef));
      result.add((dsl) -> {
        sqlHelper.executeStatement(dsl,foreignKeyStatement,Context.ADD_FOREIGN_KEY);
        return metaDataReadInterface.getReferenceInternalFields(tableRef).stream().map(f -> f.getName()).collect(Collectors.joining("String_Node_Str")) + "String_Node_Str";
      }
);
    }
 else {
      if (!tableRef.isRoot() && !tableRef.getParent().get().isRoot()) {
        String foreignKeyIndexStatement=getCreateDocPartTableIndexStatement(schemaName,tableName,metaDataReadInterface.getReferenceInternalFields(tableRef));
        result.add((dsl) -> {
          sqlHelper.executeStatement(dsl,foreignKeyIndexStatement,Context.CREATE_INDEX);
          return metaDataReadInterface.getReferenceInternalFields(tableRef).stream().map(f -> f.getName()).collect(Collectors.joining("String_Node_Str")) + "String_Node_Str";
        }
);
      }
    }
  }
  return result.stream();
}