Examples with Rnd io.questdb.std.Rnd used on opensource projects

Example 61 with Rnd

use of io.questdb.std.Rnd in project questdb by bluestreak01.

the class FirstTimestampGroupByFunctionFactoryTest method testNonNull.

@Test
public void testNonNull() throws SqlException {
    compiler.compile("create table tab (f timestamp)", sqlExecutionContext);
    final Rnd rnd = new Rnd();
    try (TableWriter w = engine.getWriter(sqlExecutionContext.getCairoSecurityContext(), "tab", "testing")) {
        for (int i = 100; i > 10; i--) {
            TableWriter.Row r = w.newRow();
            r.putLong(0, rnd.nextLong());
            r.append();
        }
        w.commit();
    }
    try (RecordCursorFactory factory = compiler.compile("select first(f) from tab", sqlExecutionContext).getRecordCursorFactory()) {
        try (RecordCursor cursor = factory.getCursor(sqlExecutionContext)) {
            Record record = cursor.getRecord();
            Assert.assertEquals(1, cursor.size());
            Assert.assertTrue(cursor.hasNext());
            Assert.assertEquals(4689592037643856L, record.getLong(0));
        }
    }
}

Example 62 with Rnd

use of io.questdb.std.Rnd in project questdb by bluestreak01.

the class LongChainTest method testAll.

@Test
public void testAll() throws Exception {
    TestUtils.assertMemoryLeak(() -> {
        try (LongChain chain = new LongChain(1024 * 1024, Integer.MAX_VALUE)) {
            final int N = 1000;
            final int nChains = 10;
            final Rnd rnd = new Rnd();
            final LongList heads = new LongList(nChains);
            final ObjList<LongList> expectedValues = new ObjList<>();
            for (int i = 0; i < nChains; i++) {
                LongList expected = new LongList(N);
                heads.add(populateChain(chain, rnd, expected));
                expectedValues.add(expected);
                Assert.assertEquals(N, expected.size());
            }
            Assert.assertEquals(nChains, expectedValues.size());
            // values are be in reverse order
            for (int i = 0; i < nChains; i++) {
                LongChain.TreeCursor cursor = chain.getCursor(heads.getQuick(i));
                LongList expected = expectedValues.get(i);
                int count = 0;
                while (cursor.hasNext()) {
                    Assert.assertEquals(expected.getQuick(count), cursor.next());
                    count++;
                }
                Assert.assertEquals(N, count);
            }
        }
    });
}

Example 63 with Rnd

use of io.questdb.std.Rnd in project questdb by bluestreak01.

the class LastLongGroupByFunctionFactoryTest method testNonNull.

@Test
public void testNonNull() throws SqlException {
    compiler.compile("create table tab (f long)", sqlExecutionContext);
    final Rnd rnd = new Rnd();
    try (TableWriter w = engine.getWriter(sqlExecutionContext.getCairoSecurityContext(), "tab", "testing")) {
        for (int i = 100; i > 10; i--) {
            TableWriter.Row r = w.newRow();
            r.putLong(0, rnd.nextLong());
            r.append();
        }
        w.commit();
    }
    try (RecordCursorFactory factory = compiler.compile("select last(f) from tab", sqlExecutionContext).getRecordCursorFactory()) {
        try (RecordCursor cursor = factory.getCursor(sqlExecutionContext)) {
            Record record = cursor.getRecord();
            Assert.assertEquals(1, cursor.size());
            Assert.assertTrue(cursor.hasNext());
            Assert.assertEquals(-6919361415374675248L, record.getLong(0));
        }
    }
}

Example 64 with Rnd

use of io.questdb.std.Rnd in project questdb by bluestreak01.

the class LastTimestampGroupByFunctionFactoryTest method testNonNull.

@Test
public void testNonNull() throws SqlException {
    compiler.compile("create table tab (f timestamp)", sqlExecutionContext);
    final Rnd rnd = new Rnd();
    try (TableWriter w = engine.getWriter(sqlExecutionContext.getCairoSecurityContext(), "tab", "testing")) {
        for (int i = 100; i > 10; i--) {
            TableWriter.Row r = w.newRow();
            r.putLong(0, rnd.nextLong());
            r.append();
        }
        w.commit();
    }
    try (RecordCursorFactory factory = compiler.compile("select last(f) from tab", sqlExecutionContext).getRecordCursorFactory()) {
        try (RecordCursor cursor = factory.getCursor(sqlExecutionContext)) {
            Record record = cursor.getRecord();
            Assert.assertEquals(1, cursor.size());
            Assert.assertTrue(cursor.hasNext());
            Assert.assertEquals(-6919361415374675248L, record.getTimestamp(0));
        }
    }
}

Example 65 with Rnd

use of io.questdb.std.Rnd in project questdb by bluestreak01.

the class MaxDoubleGroupByFunctionFactoryTest method testFirstNull.

@Test
public void testFirstNull() throws SqlException {
    compiler.compile("create table tab (f double)", sqlExecutionContext);
    final Rnd rnd = new Rnd();
    try (TableWriter w = engine.getWriter(sqlExecutionContext.getCairoSecurityContext(), "tab", "testing")) {
        TableWriter.Row r = w.newRow();
        r.append();
        for (int i = 100; i > 10; i--) {
            r = w.newRow();
            r.putDouble(0, rnd.nextDouble());
            r.append();
        }
        w.commit();
    }
    try (RecordCursorFactory factory = compiler.compile("select max(f) from tab", sqlExecutionContext).getRecordCursorFactory()) {
        try (RecordCursor cursor = factory.getCursor(sqlExecutionContext)) {
            Record record = cursor.getRecord();
            Assert.assertEquals(1, cursor.size());
            Assert.assertTrue(cursor.hasNext());
            Assert.assertEquals(0.9856290845874263, record.getDouble(0), 0.0001);
        }
    }
}