让我们考虑这个最小的例子：
SELECT row_number() over() as GID,
unnest(myarray) as letter
FROM
(
SELECT string_to_array('a,b,b', ',') as myarray
) AS T
现在，由于表T仅包含一个元素，因此即使返回3行，row_number()函数也总是返回1。
所以我得到了
GID letter
1 "a"
1 "b"
1 "b"
代替
GID letter
1 "a"
2 "b"
3 "b"
如何解决？
答案 0 :(得分：2)
在import android.Manifest;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.media.MediaPlayer;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.os.StrictMode;
import android.provider.Settings;
import android.speech.RecognitionListener;
import android.speech.RecognizerIntent;
import android.speech.SpeechRecognizer;
import android.speech.tts.TextToSpeech;
import android.util.Log;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.content.ContextCompat;
import com.google.android.material.bottomnavigation.BottomNavigationView;
import java.util.ArrayList;
import java.util.Locale;
public class MainActivity extends AppCompatActivity {
GoogleTranslateActivity translator;
private TextToSpeech textToSpeech;
private Button btn, button2, trans;
String soundName;
MediaPlayer mp = null;
String text2speak;
private boolean connected;
private static final String API_KEY = "API_KEY";
private EditText editText, editTranslate;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
.permitAll().build();
StrictMode.setThreadPolicy(policy);
btn = findViewById(R.id.material_icon_button);
button2 = findViewById(R.id.material_icon_yoruba);
trans = findViewById(R.id.material_icon_translate);
checkPermission();
editText = findViewById(R.id.editText);
editTranslate = findViewById(R.id.editTranslate);
final SpeechRecognizer mSpeechRecognizer = SpeechRecognizer.createSpeechRecognizer(this);
final Intent mSpeechRecognizerIntent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
mSpeechRecognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
mSpeechRecognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE,
Locale.getDefault());
textToSpeech = new TextToSpeech(getApplicationContext(), new TextToSpeech.OnInitListener() {
@Override
public void onInit(int status) {
if (status == TextToSpeech.SUCCESS) {
int ttsLang = textToSpeech.setLanguage(Locale.US);
if (ttsLang == TextToSpeech.LANG_MISSING_DATA
|| ttsLang == TextToSpeech.LANG_NOT_SUPPORTED) {
Log.e("TTS", "The Language is not supported!");
} else {
Log.i("TTS", "Language Supported.");
}
Log.i("TTS", "Initialization success.");
} else {
Toast.makeText(getApplicationContext(), "TTS Initialization failed!", Toast.LENGTH_SHORT).show();
}
}
});
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
String data = editText.getText().toString();
Log.i("TTS", "button clicked: " + data);
int speechStatus = textToSpeech.speak(data, TextToSpeech.QUEUE_FLUSH, null);
if (speechStatus == TextToSpeech.ERROR) {
Log.e("TTS", "Error in converting Text to Speech!");
}
}
});
button2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
soundName = editTranslate.getText().toString();
soundName = soundName.replaceAll("\\s+", "_").toLowerCase();
SoundManager(soundName);
Toast.makeText(getApplicationContext(), soundName, Toast.LENGTH_LONG).show();
}
});
trans.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
text2speak = editText.getText().toString();
new EnglishToTagalog().execute();
}
});
mSpeechRecognizer.setRecognitionListener(new RecognitionListener() {
@Override
public void onReadyForSpeech(Bundle bundle) {
}
@Override
public void onBeginningOfSpeech() {
}
@Override
public void onRmsChanged(float v) {
}
@Override
public void onBufferReceived(byte[] bytes) {
}
@Override
public void onEndOfSpeech() {
}
@Override
public void onError(int i) {
}
@Override
public void onResults(Bundle bundle) {
//getting all the matches
ArrayList<String> matches = bundle
.getStringArrayList(SpeechRecognizer.RESULTS_RECOGNITION);
//displaying the first match
if (matches != null)
editText.setText(matches.get(0));
}
@Override
public void onPartialResults(Bundle bundle) {
}
@Override
public void onEvent(int i, Bundle bundle) {
}
});
findViewById(R.id.material_icon_mic).setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
switch (motionEvent.getAction()) {
case MotionEvent.ACTION_UP:
mSpeechRecognizer.stopListening();
editText.setHint("You will see input here");
break;
case MotionEvent.ACTION_DOWN:
mSpeechRecognizer.startListening(mSpeechRecognizerIntent);
editText.setText("");
editText.setHint("Listening...");
break;
}
return false;
}
});
//Initialize and Assign Variable
BottomNavigationView bottomNavigationView = findViewById(R.id.bottom_navigation);
//Set Home Selected
bottomNavigationView.setSelectedItemId(R.id.home);
bottomNavigationView.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
switch (menuItem.getItemId()){
case R.id.messages:
startActivity(new Intent(getApplicationContext(),Messages.class));
overridePendingTransition(0,0);
return true;
case R.id.home:
return true;
case R.id.info:
startActivity(new Intent(getApplicationContext(),Info.class));
overridePendingTransition(0,0);
return true;
}
return false;
}
});
}
private class EnglishToTagalog extends AsyncTask<Void, Void, Void> {
private ProgressDialog progress = null;
protected void onError(Exception ex) {
Toast.makeText(getApplicationContext(),ex.toString(), Toast.LENGTH_LONG).show();
}
@Override
protected Void doInBackground(Void... params) {
try {
translator = new GoogleTranslateActivity(API_KEY);
Thread.sleep(15000);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
@Override
protected void onCancelled() {
super.onCancelled();
}
@Override
protected void onPreExecute() {
// start the progress dialog
progress = ProgressDialog.show(MainActivity.this, null,
"Translating...");
progress.setProgressStyle(ProgressDialog.STYLE_SPINNER);
progress.setIndeterminate(true);
super.onPreExecute();
}
@Override
protected void onPostExecute(Void result) {
translated();
progress.dismiss();
super.onPostExecute(result);
}
@Override
protected void onProgressUpdate(Void... values) {
super.onProgressUpdate(values);
}
}
public void translated() {
String translatetotagalog = editText.getText().toString();
Toast.makeText(getApplicationContext(), translatetotagalog, Toast.LENGTH_LONG).show();
Log.v("raw text",translatetotagalog);
String text = translator.translte(translatetotagalog, "en", "yo");
//translatabletext = (TextView) findViewById(R.id.translatabletext);
Toast.makeText(getApplicationContext(), text, Toast.LENGTH_LONG).show();
Log.v("translated text", text);
editTranslate.setText(text);
}
protected void SoundManager(String sn){
if (mp != null){
mp.reset();
mp.release();
}
switch (sn){
case "e_kaaro":
mp = MediaPlayer.create(getApplicationContext(), R.raw.e_kaaro);
break;
case "e_kaasan":
mp = MediaPlayer.create(getApplicationContext(), R.raw.e_kaasan);
break;
case "e_kaale":
mp = MediaPlayer.create(getApplicationContext(), R.raw.e_kaale);
break;
case "bawo_ni_o_se_n_se":
mp = MediaPlayer.create(getApplicationContext(), R.raw.bawo_ni_o_se_n_se);
break;
case "mo_nife_re":
mp = MediaPlayer.create(getApplicationContext(), R.raw.mo_nife_re);
break;
default:
mp = MediaPlayer.create(getApplicationContext(), R.raw.crowd);
}
//Toast.makeText(getApplicationContext(), "clicked " + sn, Toast.LENGTH_LONG).show();
mp.start();
}
@Override
public void onDestroy() {
super.onDestroy();
if (textToSpeech != null) {
textToSpeech.stop();
textToSpeech.shutdown();
}
}
private void checkPermission() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (!(ContextCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO) == PackageManager.PERMISSION_GRANTED)) {
Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS,
Uri.parse("package:" + getPackageName()));
startActivity(intent);
finish();
}
}
}
public boolean checkInternetConnection() {
//Check internet connection:
ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
//Means that we are connected to a network (mobile or wi-fi)
connected = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState() == NetworkInfo.State.CONNECTED ||
connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState() == NetworkInfo.State.CONNECTED;
return connected;
}
}
调用周围放置unnest子句，这样string_to_array已经有多行了：
T我也建议使用WITH ORDINALITY而不是SELECT row_number() over() as GID, myarray as letter
FROM (
SELECT unnest(string_to_array('a,b,c', ',')) as myarray
) AS T
来获取索引数组元素：
row_number()如果您想保留返回数组的选择表达式，这也可以使用
SELECT gid, letter
FROM UNNEST(string_to_array('a,b,c', ',')) WITH ORDINALITY AS T(gid, letter)
或使用横向查询：
SELECT gid, letter
FROM UNNEST(
(SELECT string_to_array('a,b,c', ',') as myarray)
) WITH ORDINALITY AS T(letter, gid)
答案 1 :(得分：1)
在编辑示例之前，请尝试以下查询：
SELECT
row_number() OVER () AS gid, ST_AsText(geom)
FROM (SELECT
st_makepixel(
ST_GeomFromText('POLYGON((2580000 1182000,2581000 1182000,2581000 1183000,2580000 1183000,2580000 1182000))',2056),200.0,50) AS geom) j
gid | st_astext
-----+--------------------------------------------------------------------------------------------
1 | POLYGON((2580000 1182000,2580200 1182000,2580200 1182200,2580000 1182200,2580000 1182000))
2 | POLYGON((2580200 1182000,2580400 1182000,2580400 1182200,2580200 1182200,2580200 1182000))
3 | POLYGON((2580400 1182000,2580600 1182000,2580600 1182200,2580400 1182200,2580400 1182000))
4 | POLYGON((2580600 1182000,2580800 1182000,2580800 1182200,2580600 1182200,2580600 1182000))
5 | POLYGON((2580800 1182000,2581000 1182000,2581000 1182200,2580800 1182200,2580800 1182000))
6 | POLYGON((2580000 1182200,2580200 1182200,2580200 1182400,2580000 1182400,2580000 1182200))
7 | POLYGON((2580200 1182200,2580400 1182200,2580400 1182400,2580200 1182400,2580200 1182200))
8 | POLYGON((2580400 1182200,2580600 1182200,2580600 1182400,2580400 1182400,2580400 1182200))
9 | POLYGON((2580600 1182200,2580800 1182200,2580800 1182400,2580600 1182400,2580600 1182200))
10 | POLYGON((2580800 1182200,2581000 1182200,2581000 1182400,2580800 1182400,2580800 1182200))
11 | POLYGON((2580000 1182400,2580200 1182400,2580200 1182600,2580000 1182600,2580000 1182400))
12 | POLYGON((2580200 1182400,2580400 1182400,2580400 1182600,2580200 1182600,2580200 1182400))
13 | POLYGON((2580400 1182400,2580600 1182400,2580600 1182600,2580400 1182600,2580400 1182400))
14 | POLYGON((2580600 1182400,2580800 1182400,2580800 1182600,2580600 1182600,2580600 1182400))
15 | POLYGON((2580800 1182400,2581000 1182400,2581000 1182600,2580800 1182600,2580800 1182400))
16 | POLYGON((2580000 1182600,2580200 1182600,2580200 1182800,2580000 1182800,2580000 1182600))
17 | POLYGON((2580200 1182600,2580400 1182600,2580400 1182800,2580200 1182800,2580200 1182600))
18 | POLYGON((2580400 1182600,2580600 1182600,2580600 1182800,2580400 1182800,2580400 1182600))
19 | POLYGON((2580600 1182600,2580800 1182600,2580800 1182800,2580600 1182800,2580600 1182600))
20 | POLYGON((2580800 1182600,2581000 1182600,2581000 1182800,2580800 1182800,2580800 1182600))
21 | POLYGON((2580000 1182800,2580200 1182800,2580200 1183000,2580000 1183000,2580000 1182800))
22 | POLYGON((2580200 1182800,2580400 1182800,2580400 1183000,2580200 1183000,2580200 1182800))
23 | POLYGON((2580400 1182800,2580600 1182800,2580600 1183000,2580400 1183000,2580400 1182800))
24 | POLYGON((2580600 1182800,2580800 1182800,2580800 1183000,2580600 1183000,2580600 1182800))
25 | POLYGON((2580800 1182800,2581000 1182800,2581000 1183000,2580800 1183000,2580800 1182800))
(25 Zeilen)