Tabelle in Oracle NoSQL Database Cloud Service erstellen
Schritte zum Erstellen einer Tabelle in Oracle NoSQL Database Cloud Service und zum Auffüllen mit Daten.
Tabelle erstellen und auffüllen
Sie können eine Tabelle in Oracle NoSQL Database Cloud Service erstellen und mit Daten füllen. Dazu müssen Sie mit Ihren eigenen Zugangsdaten oder als autorisierter Instanz-Principal von einer Oracle Cloud Compute-Instanz eine Verbindung zum NoSQL Cloud Service herstellen können. Wenn Sie neu bei NoSQL Cloud Service sind, können Sie mit dem 30-minütigen Tutorial und der Übung loslegen. Dieses Tutorial enthält ein einfaches Beispiel, in dem gezeigt wird, wie Sie eine einfache Tabelle in NoSQL Cloud Service mit Ihren eigenen Zugangsdaten erstellen und füllen.
Beispielanwendung: Komplexe Tabellen erstellen und füllen
Das hier dargestellte Programm zeigt, wie Sie eine Tabelle im NoSQL Cloud Service erstellen und diese Tabelle mit komplexen Daten füllen. Um die in diesem Abschnitt dargestellte Anwendung zu verwenden, kopieren Sie zunächst das Java-Programm CreateLoadComplexTable.java in das Verzeichnis example/nosql/cloud/table in Ihrer Umgebung. Anschließend können Sie die Anwendung kompilieren und ausführen.
package nosql.cloud.table;
import java.io.File;
import java.math.BigDecimal;
import java.security.SecureRandom;
import java.sql.Timestamp;
import java.time.Instant;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
import oracle.nosql.driver.NoSQLHandle;
import oracle.nosql.driver.NoSQLHandleConfig;
import oracle.nosql.driver.NoSQLHandleFactory;
import oracle.nosql.driver.Region;
import oracle.nosql.driver.iam.SignatureProvider;
import oracle.nosql.driver.ops.DeleteRequest;
import oracle.nosql.driver.ops.DeleteResult;
import oracle.nosql.driver.ops.GetRequest;
import oracle.nosql.driver.ops.GetResult;
import oracle.nosql.driver.ops.PutRequest;
import oracle.nosql.driver.ops.PutResult;
import oracle.nosql.driver.ops.QueryRequest;
import oracle.nosql.driver.ops.QueryResult;
import oracle.nosql.driver.ops.TableLimits;
import oracle.nosql.driver.ops.TableRequest;
import oracle.nosql.driver.ops.TableResult;
import oracle.nosql.driver.util.TimestampUtil;
import oracle.nosql.driver.values.ArrayValue;
import oracle.nosql.driver.values.LongValue;
import oracle.nosql.driver.values.MapValue;
import oracle.nosql.driver.values.StringValue;
public final class CreateLoadComplexTable {
private static final SecureRandom generator = new SecureRandom();
private final NoSQLHandle ociNoSqlHndl;
private long nOps = 10; /* Default number of rows. */
private long nRowsAdded;
private boolean deleteExisting = false;
private static String compartment = "";
private static String tableName = "";
public static void main(final String[] args) {
try {
final CreateLoadComplexTable loadData =
new CreateLoadComplexTable(args);
loadData.run();
System.exit(0);
} catch (Throwable e) {
e.printStackTrace();
System.out.println("Failed to create and populate the " +
"requested table [name = " + tableName +
"]");
System.exit(1);
}
}
private CreateLoadComplexTable(final String[] argv) {
String tenantOcid = "";
String userOcid = "";
String fingerprint = "";
String privateKeyFilename = "";
String passStr = null;
File privateKeyFile = null;
char[] passPhrase = null;
final int nArgs = argv.length;
int argc = 0;
if (nArgs == 0) {
usage(null);
}
while (argc < nArgs) {
final String thisArg = argv[argc++];
if ("-tenant".equals(thisArg)) {
if (argc < nArgs) {
tenantOcid = argv[argc++];
} else {
usage("-tenant argument requires an argument");
}
} else if ("-user".equals(thisArg)) {
if (argc < nArgs) {
userOcid = argv[argc++];
} else {
usage("-user requires an argument");
}
} else if ("-fp".equals(thisArg)) {
if (argc < nArgs) {
fingerprint = argv[argc++];
} else {
usage("-fp requires an argument");
}
} else if ("-pem".equals(thisArg)) {
if (argc < nArgs) {
privateKeyFilename = argv[argc++];
privateKeyFile = new File(privateKeyFilename);
} else {
usage("-pem requires an argument");
}
} else if ("-compartment".equals(thisArg)) {
if (argc < nArgs) {
compartment = argv[argc++];
} else {
usage("-compartment requires an argument");
}
} else if ("-table".equals(thisArg)) {
if (argc < nArgs) {
tableName = argv[argc++];
} else {
usage("-table requires an argument");
}
} else if ("-n".equals(thisArg)) {
if (argc < nArgs) {
nOps = Long.parseLong(argv[argc++]);
} else {
usage("-n requires an argument");
}
} else if ("-phrase".equals(thisArg)) {
passStr = argv[argc++];
passPhrase = passStr.toCharArray();
} else if ("-delete".equals(thisArg)) {
deleteExisting = true;
} else {
usage("Unknown argument: " + thisArg);
}
}
nRowsAdded = nOps;
System.out.println("COMPARTMENT: " + compartment);
System.out.println("TABLE: " + tableName);
final SignatureProvider auth =
new SignatureProvider(tenantOcid, userOcid, fingerprint,
privateKeyFile, passPhrase);
final NoSQLHandleConfig config =
new NoSQLHandleConfig(Region.US_ASHBURN_1, auth);
ociNoSqlHndl = NoSQLHandleFactory.createNoSQLHandle(config);
createTable();
}
private void usage(final String message) {
if (message != null) {
System.out.println("\n" + message + "\n");
}
System.out.println("usage: " + getClass().getName());
System.out.println
("\t-tenant <tenant ocid>\n" +
"\t-user <user ocid>\n" +
"\t-fp <fingerprint>\n" +
"\t-pem <private key file>\n" +
"\t-compartment <compartment name>\n" +
"\t-table <table name>\n" +
"\t-n <total records to create>\n" +
"\t[-phrase <[pass phrase>]\n" +
"\t-delete (default: false) [delete all “ +
“pre-existing data]\n");
System.exit(1);
}
private void run() {
if (deleteExisting) {
deleteExistingData();
}
doLoad();
}
private void createTable() {
final int readUnits = 10;
final int writeUnits = 10;
final int storageGb = 1;
final int ttlDays = 1;
/* Wait no more than 2 minutes for table create. */
final int waitMs = 2 * 60 * 1000;
/* Check for table existence every 2 seconds. */
final int delayMs = 2 * 1000;
/* Table creation statement. */
final String statement =
"CREATE TABLE IF NOT EXISTS " + tableName +
" (" +
"ID INTEGER," +
"AINT INTEGER," +
"ALON LONG," +
"ADOU DOUBLE," +
"ANUM NUMBER," +
"AUUID STRING," +
"ATIM_P0 TIMESTAMP(0)," +
"ATIM_P3 TIMESTAMP(3)," +
"ATIM_P6 TIMESTAMP(6)," +
"ATIM_P9 TIMESTAMP(9)," +
"AENU ENUM(S,M,L,XL,XXL,XXXL)," +
"ABOO BOOLEAN," +
"ABIN BINARY," +
"AFBIN BINARY(16)," +
"ARRY ARRAY (INTEGER)," +
"AMAP MAP (DOUBLE)," +
"AREC RECORD(" +
"BLON LONG," +
"BTIM_P6 TIMESTAMP(6)," +
"BNUM NUMBER," +
"BSTR STRING," +
"BRRY ARRAY(DOUBLE))," +
"AJSON JSON," +
"PRIMARY KEY (SHARD(AINT), ALON, ADOU, ID)" +
")" +
" USING TTL " + ttlDays + " days";
System.out.println(statement);
final TableRequest tblRqst = new TableRequest();
tblRqst.setCompartment(compartment).setStatement(statement);
final TableLimits tblLimits =
new TableLimits(readUnits, writeUnits, storageGb);
tblRqst.setTableLimits(tblLimits);
final TableResult tblResult =
ociNoSqlHndl.tableRequest(tblRqst);
tblResult.waitForCompletion(ociNoSqlHndl, waitMs, delayMs);
if (tblResult.getTableState() != TableResult.State.ACTIVE) {
final String msg =
"TIMEOUT: Failed to create table in OCI NoSQL “ +
“[table=" + tableName + "]";
throw new RuntimeException(msg);
}
}
private void doLoad() {
final List<MapValue> rows = generateData(nOps);
for (MapValue row : rows) {
addRow(row);
}
displayRow();
final long nRowsTotal = nRowsInTable();
if (nOps > nRowsAdded) {
System.out.println(
nOps + " records requested, " +
nRowsAdded + " unique records actually added " +
"[" + (nOps - nRowsAdded) + " duplicates], " +
nRowsTotal + " records total in table");
} else {
System.out.println(
nOps + " records requested, " +
nRowsAdded + " unique records added, " +
nRowsTotal + " records total in table");
}
}
private void addRow(final MapValue row) {
final PutRequest putRqst = new PutRequest();
putRqst.setCompartment(compartment).setTableName(tableName);
putRqst.setValue(row);
final PutResult putRslt = ociNoSqlHndl.put(putRqst);
if (putRslt.getVersion() == null) {
final String msg =
"PUT: Failed to insert row [table=" + tableName +
", row = " + row + "]";
}
}
/* Retrieves and deletes each row from the table. */
private void deleteExistingData() {
final String selectAll = "SELECT * FROM " + tableName;
final QueryRequest queryRqst = new QueryRequest();
queryRqst.setCompartment(compartment).setStatement(selectAll);
long cnt = 0;
do {
QueryResult queryRslt = ociNoSqlHndl.query(queryRqst);
final List<MapValue> rowMap = queryRslt.getResults();
for (MapValue row : rowMap) {
final DeleteRequest delRqst = new DeleteRequest();
delRqst.setCompartment(compartment)
.setTableName(tableName);
delRqst.setKey(row);
final DeleteResult delRslt =
ociNoSqlHndl.delete(delRqst);
if (delRslt.getSuccess()) {
cnt++;
}
}
} while (!queryRqst.isDone());
System.out.println(cnt + " records deleted");
}
/* Counts the number of rows in the table. */
private long nRowsInTable() {
final String selectAll = "SELECT * FROM " + tableName;
final QueryRequest queryRqst = new QueryRequest();
queryRqst.setCompartment(compartment).setStatement(selectAll);
long cnt = 0;
do {
QueryResult queryRslt = ociNoSqlHndl.query(queryRqst);
final List<MapValue> rowMap = queryRslt.getResults();
for (MapValue row : rowMap) {
cnt++;
}
} while (!queryRqst.isDone());
return cnt;
}
/* Convenience method for displaying output when debugging. */
private void displayRow() {
final String selectAll = "SELECT * FROM " + tableName;
final QueryRequest queryRqst = new QueryRequest();
queryRqst.setCompartment(compartment).setStatement(selectAll);
do {
QueryResult queryRslt = ociNoSqlHndl.query(queryRqst);
final List<MapValue> rowMap = queryRslt.getResults();
for (MapValue row : rowMap) {
System.out.println(row);
}
} while (!queryRqst.isDone());
}
/* Generates randomized data with which to populate the table. */
private List<MapValue> generateData(final long count) {
List<MapValue> rows = new ArrayList<>();
final BigDecimal[] numberArray = {
new BigDecimal("3E+8"),
new BigDecimal("-1.7976931348623157E+2"),
new BigDecimal("12345.76455"),
new BigDecimal("12345620.789"),
new BigDecimal("1234562078912345678988765446777475657"),
new BigDecimal("1.7976931348623157E+305"),
new BigDecimal("-1.7976931348623157E+304")
};
final Timestamp[] timeArray_p0 = {
TimestampUtil.parseString("2010-05-05T10:45:00"),
TimestampUtil.parseString("2011-05-05T10:45:01"),
Timestamp.from(Instant.parse("2021-07-15T11:31:21Z"))
};
final Timestamp[] timeArray_p3 = {
TimestampUtil.parseString("2011-05-05T10:45:01.123"),
Timestamp.from(
Instant.parse("2021-07-15T11:31:47.549Z")),
Timestamp.from(
Instant.parse("2021-07-15T11:32:12.836Z"))
};
final Timestamp[] timeArray_p6 = {
TimestampUtil.parseString(
"2014-05-05T10:45:01.789456Z"),
TimestampUtil.parseString(
"2013-08-20T12:34:56.123456Z"),
Timestamp.from(Instant.parse(
"2021-07-15T11:31:47.549213Z")),
Timestamp.from(Instant.parse(
"2021-07-15T11:32:12.567836Z"))
};
final Timestamp[] timeArray_p9 = {
Timestamp.from(Instant.parse(
"2021-07-15T12:46:35.574639954Z")),
Timestamp.from(Instant.parse(
"2021-07-15T12:47:32.883922660Z")),
Timestamp.from(Instant.parse(
"2021-07-15T12:48:11.321131987Z"))
};
final String[] enumArray =
{"S", "M", "L", "XL", "XXL", "XXXL"};
for(int i = 1; i <= count; ++i) {
byte[] byteArray = new byte[16];
generator.nextBytes(byteArray);
MapValue row = new MapValue(true,16);
row.put("ID", i);
row.put("AINT", generator.nextInt());
row.put("ALON", generator.nextLong());
row.put("ADOU", generator.nextDouble());
row.put("ANUM",
numberArray[generator.nextInt(
numberArray.length)]);
row.put("AUUID", UUID.randomUUID().toString());
/* TIMESTAMP */
row.put("ATIM_P0",
timeArray_p0[generator.nextInt(
timeArray_p0.length)]);
row.put("ATIM_P3",
timeArray_p3[generator.nextInt(
timeArray_p3.length)]);
row.put("ATIM_P6",
timeArray_p6[generator.nextInt(
timeArray_p6.length)]);
row.put("ATIM_P9",
timeArray_p9[generator.nextInt(
timeArray_p9.length)]);
/* ENUM */
row.put("AENU", enumArray[i % enumArray.length]);
/* BOOLEAN */
row.put("ABOO", generator.nextBoolean());
/* BINARY & FIXED_BINARY stored as strings */
row.put("ABIN", byteArray);
row.put("AFBIN", byteArray);
/* ARRAY of INTEGER */
ArrayValue integerArr = new ArrayValue();
for (int j = 0; j < 3; ++j) {
integerArr.add(generator.nextInt());
}
row.put("ARRY", integerArr);
/* MAP of DOUBLE */
MapValue map = new MapValue(true,3);
map.put("d1", generator.nextDouble());
map.put("d2", generator.nextDouble());
row.put("AMAP", map);
/*
* RECORD of: LONG, TIMESTAMP, NUMBER,
* STRING, ARRAY of DOUBLE
*/
MapValue record = new MapValue(true,5);
/* LONG element */
record.put("BLON", generator.nextLong());
/* TIMESTAMP element */
record.put("BTIM_P6",
timeArray_p6[generator.nextInt(
timeArray_p6.length)]);
/* NUMBER element */
record.put("BNUM",
numberArray[generator.nextInt(
numberArray.length)]);
/* STRING element */
record.put("BSTR", Double.toString(
generator.nextDouble()));
/* ARRAY of DOUBLE element */
ArrayValue doubleArr = new ArrayValue();
for (int j = 0; j < 3; ++j) {
doubleArr.add(generator.nextDouble());
}
record.put("BRRY", doubleArr);
row.put("AREC", record);
/* JSON */
MapValue json = new MapValue(true,5);
json.put("id", i);
json.put("name", "name_" + i);
json.put("age", i + 10);
row.put("AJSON", json);
rows.add(row);
}
return rows;
}
}
Anwendung erstellen und ausführen
Anwendung kompilieren
Um die Anwendung
CreateLoadComplexTable.java zu kompilieren, wechseln Sie zunächst in das übergeordnete Verzeichnis des Beispielverzeichnisses. Wenn Sie dann das Oracle NoSQL-SDK für Java unter diesem Verzeichnis installiert haben, geben Sie den folgenden Befehl ein:javac -classpath oracle-nosql-java-sdk/lib/nosqldriver.jar:examples
examples/nosql/cloud/table/CreateLoadComplexTable.javaAusführen der Anwendung
Nach erfolgreicher Kompilierung kann die Anwendung durch Eingabe des folgenden Befehls ausgeführt werden:
java -classpath oracle-nosql-java-sdk/lib/nosqldriver.jar:examples nosql.cloud.table.CreateLoadComplexTable
-tenant <ocid-of-your-tennancy> -user <your-user-ocid> -fp <your-finger-print> -pem <path-to-your-oci-private-key-file>
-compartment <compartment-ocid-for-the-table> -table tableName1 [-n 11] [-delete]Im obigen Beispiel sind alle Argumente für Ihre Benutzerzugangsdaten erforderlich (-tenant, -fp, -pem, and -compartment), ebenso wie das Argument -table, das den Namen der Tabelle angibt, die mit Daten erstellt und geladen werden soll. Die restlichen Argumente (-n and -delete) sind optional.
Wenn das Argument -n angegeben wird, stellt der angegebene Wert die Anzahl der neuen Zeilen dar, die generiert und in die Tabelle geschrieben werden sollen. Wenn das Argument nicht angegeben ist, werden standardmäßig 10 Zeilen in die Tabelle geschrieben.
Wenn das Argument -delete angegeben wird, werden alle vorhandenen Zeilen, die durch vorherige Ausführungen der Anwendung in die Tabelle geschrieben wurden, zuerst aus der Tabelle gelöscht, bevor neue Zeilen hinzugefügt werden.
Nachdem die Anwendung ausgeführt wurde, können Sie prüfen, ob die Tabelle vorhanden ist und mit Daten gefüllt ist, indem Sie sich bei der Oracle Cloud-Konsole anmelden, zum Tabellenabschnitt des Oracle NoSQL Database-Service navigieren und die Tabelle mit dem Namen abfragen, den Sie für das Argument -table angegeben haben.
Tabelle in Oracle NoSQL Database Cloud Service erstellen
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