Question

是否可以通过在Oracle 12c中的sys表上执行SELECT来执行ALTER INDEX。请看下面的

我试图通过下面的select子句找到我已经为其准备了alter语句的未使用的索引 -

SELECT 'alter index ' || owner || '.' || index_name || ' monitoring usage;'
FROM dba_indexes
WHERE owner NOT in (
        'SYSTEM',
        'SYS');

接下来，我将手动将此SQL的输出复制到新的SQL命令选项卡并执行它们。而是可以直接执行这些语句而不是显示它们？

我试图在SQL中实现这一点，作为来自任何SQL实用程序（如DBViz或SQL +，而不是IN PL / SQL或Unix）的单个语句可执行文件。

Answer 1

你可以这两种方式：

1-将结果欺骗到文件并运行文件。

BEGIN
   FOR rec in (select owner, index_name FROM dba_indexes WHERE owner NOT in ('SYSTEM','SYS'))
   LOOP
      query := 'alter index ' || rec.owner || '.' || rec.index_name || ' monitoring usage'
      execute immediate query;
   END LOOP;
end;
/

1-或通过PL / SQL

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ContactViewHolder> {

static final String myTag = "DocsUpload";
ArrayList<RecyclerItem> listItems = new ArrayList<>();
RecyclerView.ViewHolder holder;
int clickcount = 0;
private Context mContext;
List list = new ArrayList();
Boolean signUpModeActive = true;

public MyAdapter(ArrayList<RecyclerItem> listItems, Context mContext) {
    this.listItems = listItems;
    this.mContext = mContext;
}

@Override
public ContactViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.recycler_item_2, parent, false);

    ContactViewHolder contactViewHolder = new ContactViewHolder(view, mContext, listItems);
    return contactViewHolder;
}

@Override
public void onBindViewHolder(final ContactViewHolder holder, final int position) {

    RecyclerItem itemList = listItems.get(position);
    holder.txtTitle.setText(itemList.getTitle());
}

@Override
public int getItemCount() {
    return listItems.size();
}


public class ContactViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {

    public TextView txtTitle;
    public CheckBox checkBox;
    public TextView txtDescription;
    public ImageView txtOptionDigit;
    ArrayList<RecyclerItem> listitems = new ArrayList<RecyclerItem>();

    Context ctx;

    public ContactViewHolder(View view, Context ctx, ArrayList<RecyclerItem> listitems) {
        super(view);
        this.listitems = listitems;
        this.ctx = ctx;
        view.setOnClickListener(this);

        txtTitle = (TextView) itemView.findViewById(R.id.txtTitle);
        checkBox = (CheckBox) itemView.findViewById(R.id.checkBoxxml);
    }

    boolean m = false;

    @Override
    public void onClick(View v) {
        clickcount = clickcount + 1;


        Log.e("count", String.valueOf(clickcount));
        int position = getAdapterPosition();
        final RecyclerItem listitems = this.listitems.get(position);
        final String getname = listitems.getTitle().replace(" absent" , "").replace(" present" , "");

        if (signUpModeActive ) {

            signUpModeActive = false;
            listItems.get(position).setTitle(getname + " " + "absent");

        } else {

            signUpModeActive = true;
            listItems.get(position).setTitle(getname + " " + "present");
        }


        notifyDataSetChanged();
    }

}

public void getsetadapt(String pos) {

    list.add(pos);
    Log.e("listdata", String.valueOf(list));


    for (int i = 0; i < list.size(); i++) {
        Log.i("Value " + i, String.valueOf(list.get(i)));

        i++;

    }
}

Answer 2

SELECT * FROM(SELECT 'alter index ' || owner || '.' || index_name || ' monitoring usage;'
FROM dba_indexes
WHERE owner NOT in (
        'SYSTEM',
        'SYS');)

执行另一个SQL准备的SQL语句

2 个答案: