Program: 95901
Project: 95901
Buggy source:
@Override public List<String> getPartitionColumns(String schema,String table) throws VerdictDBDbmsException {
  List<String> partition=new ArrayList<>();
  DbmsQueryResult queryResult;
  if (syntax instanceof ImpalaSyntax) {
    try {
      queryResult=executeQuery(syntax.getPartitionCommand(schema,table));
      for (int i=0; i < queryResult.getColumnCount(); i++) {
        String columnName=queryResult.getColumnName(i);
        if (columnName.equals("String_Node_Str")) {
          break;
        }
 else         partition.add(columnName);
      }
      return partition;
    }
 catch (    Exception e) {
      return partition;
    }
  }
 else {
    queryResult=executeQuery(syntax.getPartitionCommand(schema,table));
  }
  if (syntax instanceof PostgresqlSyntax) {
    if (queryResult.next()) {
      Object o=queryResult.getValue(0);
      String[] arr=o.toString().split("String_Node_Str");
      List<Pair<String,String>> columns=getColumns(schema,table);
      for (int i=0; i < arr.length; i++) {
        partition.add(columns.get(Integer.valueOf(arr[i]) - 1).getKey());
      }
    }
  }
 else   if (syntax instanceof HiveSyntax || syntax instanceof SparkSyntax) {
    boolean hasPartitionInfoStarted=false;
    while (queryResult.next()) {
      String name=queryResult.getString(0);
      if (hasPartitionInfoStarted && (name.equalsIgnoreCase("String_Node_Str") == false)) {
        partition.add(name);
      }
 else       if (name.equalsIgnoreCase("String_Node_Str")) {
        hasPartitionInfoStarted=true;
      }
    }
  }
 else {
    while (queryResult.next()) {
      partition.add(queryResult.getString(0));
    }
  }
  return partition;
}

Fixed version (ground truth):
@Override public List<String> getPartitionColumns(String schema,String table) throws VerdictDBDbmsException {
  List<String> partition=new ArrayList<>();
  DbmsQueryResult queryResult;
  if (syntax instanceof ImpalaSyntax) {
    try {
      queryResult=executeQuery(syntax.getPartitionCommand(schema,table));
      for (int i=0; i < queryResult.getColumnCount(); i++) {
        String columnName=queryResult.getColumnName(i);
        if (columnName.equals("String_Node_Str")) {
          break;
        }
 else         partition.add(columnName);
      }
      return partition;
    }
 catch (    Exception e) {
      if (e.getMessage().contains("String_Node_Str")) {
        return partition;
      }
 else {
        throw e;
      }
    }
  }
 else {
    queryResult=executeQuery(syntax.getPartitionCommand(schema,table));
  }
  if (syntax instanceof PostgresqlSyntax) {
    if (queryResult.next()) {
      Object o=queryResult.getValue(0);
      String[] arr=o.toString().split("String_Node_Str");
      List<Pair<String,String>> columns=getColumns(schema,table);
      for (int i=0; i < arr.length; i++) {
        partition.add(columns.get(Integer.valueOf(arr[i]) - 1).getKey());
      }
    }
  }
 else   if (syntax instanceof HiveSyntax || syntax instanceof SparkSyntax) {
    boolean hasPartitionInfoStarted=false;
    while (queryResult.next()) {
      String name=queryResult.getString(0);
      if (hasPartitionInfoStarted && (name.equalsIgnoreCase("String_Node_Str") == false)) {
        partition.add(name);
      }
 else       if (name.equalsIgnoreCase("String_Node_Str")) {
        hasPartitionInfoStarted=true;
      }
    }
  }
 else {
    while (queryResult.next()) {
      partition.add(queryResult.getString(0));
    }
  }
  return partition;
}