Examples with RecordCursor io.questdb.cairo.sql.RecordCursor used on opensource projects

Example 46 with RecordCursor

use of io.questdb.cairo.sql.RecordCursor in project questdb by bluestreak01.

the class HaversineDistDegreeGroupByFunctionFactoryTest method test3Rows.

@Test
public void test3Rows() throws SqlException {
    compiler.compile("create table tab (lat double, lon double, k timestamp)", sqlExecutionContext);
    try (TableWriter w = engine.getWriter(sqlExecutionContext.getCairoSecurityContext(), "tab", "testing")) {
        double latDegree = 1;
        double lonDegree = 2;
        long ts = 0;
        for (int i = 0; i < 3; i++) {
            TableWriter.Row r = w.newRow();
            r.putDouble(0, latDegree);
            r.putDouble(1, lonDegree);
            r.putTimestamp(2, ts);
            r.append();
            latDegree += 1;
            lonDegree += 1;
            ts += 10_000_000_000L;
        }
        w.commit();
    }
    try (RecordCursorFactory factory = compiler.compile("select haversine_dist_deg(lat, lon, k) 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(314.4073265716869, record.getDouble(0), DELTA);
        }
    }
}

Example 47 with RecordCursor

use of io.questdb.cairo.sql.RecordCursor in project questdb by bluestreak01.

the class HaversineDistDegreeGroupByFunctionFactoryTest method testPositiveLatLon.

@Test
public void testPositiveLatLon() throws SqlException {
    compiler.compile("create table tab (lat double, lon double, k timestamp)", sqlExecutionContext);
    try (TableWriter w = engine.getWriter(sqlExecutionContext.getCairoSecurityContext(), "tab", "testing")) {
        double latDegree = 1;
        double lonDegree = 2;
        long ts = 0;
        for (int i = 0; i < 2; i++) {
            TableWriter.Row r = w.newRow();
            r.putDouble(0, latDegree);
            r.putDouble(1, lonDegree);
            r.putTimestamp(2, ts);
            r.append();
            latDegree += 1;
            lonDegree += 1;
            ts += 10_000_000_000L;
        }
        w.commit();
    }
    try (RecordCursorFactory factory = compiler.compile("select haversine_dist_deg(lat, lon, k) 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(157.22760372823444, record.getDouble(0), DELTA);
        }
    }
}

Example 48 with RecordCursor

use of io.questdb.cairo.sql.RecordCursor in project questdb by bluestreak01.

the class HaversineDistDegreeGroupByFunctionFactoryTest method testOneNullAtEnd.

@Test
public void testOneNullAtEnd() throws SqlException {
    compiler.compile("create table tab (lat double, lon double, k timestamp)", sqlExecutionContext);
    try (TableWriter w = engine.getWriter(sqlExecutionContext.getCairoSecurityContext(), "tab", "testing")) {
        TableWriter.Row r;
        double latDegree = 1;
        double lonDegree = 2;
        long ts = 0;
        for (int i = 0; i < 2; i++) {
            r = w.newRow();
            r.putDouble(0, latDegree);
            r.putDouble(1, lonDegree);
            r.putTimestamp(2, ts);
            r.append();
            latDegree += 1;
            lonDegree += 1;
            ts += 10_000_000_000L;
        }
        r = w.newRow();
        r.append();
        w.commit();
    }
    try (RecordCursorFactory factory = compiler.compile("select haversine_dist_deg(lat, lon, k) 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(157.22760372823444, record.getDouble(0), DELTA);
        }
    }
}

Example 49 with RecordCursor

use of io.questdb.cairo.sql.RecordCursor in project questdb by bluestreak01.

the class HaversineDistDegreeGroupByFunctionFactoryTest method testNegativeLatLon.

@Test
public void testNegativeLatLon() throws SqlException {
    compiler.compile("create table tab (lat double, lon double, k timestamp)", sqlExecutionContext);
    try (TableWriter w = engine.getWriter(sqlExecutionContext.getCairoSecurityContext(), "tab", "testing")) {
        double latDegree = -1;
        double lonDegree = -2;
        long ts = 0;
        for (int i = 0; i < 2; i++) {
            TableWriter.Row r = w.newRow();
            r.putDouble(0, latDegree);
            r.putDouble(1, lonDegree);
            r.putTimestamp(2, ts);
            r.append();
            latDegree -= 1;
            lonDegree -= 1;
        }
        w.commit();
    }
    try (RecordCursorFactory factory = compiler.compile("select haversine_dist_deg(lat, lon, k) 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(157.22760372823444, record.getDouble(0), DELTA);
        }
    }
}

Example 50 with RecordCursor

use of io.questdb.cairo.sql.RecordCursor in project questdb by bluestreak01.

the class LastDoubleGroupByFunctionFactoryTest method testNonNull.

@Test
public void testNonNull() throws SqlException {
    compiler.compile("create table tab (f double)", 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.putDouble(0, rnd.nextDouble());
            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(0.3901731258748704, record.getDouble(0), 0.0001);
        }
    }
}