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

Example 81 with RecordCursor

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

the class MinIntGroupByFunctionFactoryTest method testAllNull.

@Test
public void testAllNull() throws SqlException {
    compiler.compile("create table tab (f int)", sqlExecutionContext);
    try (TableWriter w = engine.getWriter(sqlExecutionContext.getCairoSecurityContext(), "tab", "testing")) {
        for (int i = 100; i > 10; i--) {
            TableWriter.Row r = w.newRow();
            r.append();
        }
        w.commit();
    }
    try (RecordCursorFactory factory = compiler.compile("select min(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(Numbers.INT_NaN, record.getInt(0));
        }
    }
}

Example 82 with RecordCursor

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

the class MinIntGroupByFunctionFactoryTest method testFirstNull.

@Test
public void testFirstNull() throws SqlException {
    compiler.compile("create table tab (f int)", sqlExecutionContext);
    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.putInt(0, i);
            r.append();
        }
        w.commit();
    }
    try (RecordCursorFactory factory = compiler.compile("select min(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(11, record.getInt(0));
        }
    }
}

Example 83 with RecordCursor

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

the class MinLongGroupByFunctionFactoryTest method testSomeNull.

@Test
public void testSomeNull() throws SqlException {
    compiler.compile("create table tab (f long)", sqlExecutionContext);
    try (TableWriter w = engine.getWriter(sqlExecutionContext.getCairoSecurityContext(), "tab", "testing")) {
        for (int i = 100; i > 10; i--) {
            TableWriter.Row r = w.newRow();
            if (i % 4 == 0) {
                r.putLong(0, i);
            }
            r.append();
        }
        w.commit();
    }
    try (RecordCursorFactory factory = compiler.compile("select min(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(12, record.getLong(0));
        }
    }
}

Example 84 with RecordCursor

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

the class MinLongGroupByFunctionFactoryTest 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 min(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(-8968886490993754893L, record.getLong(0));
        }
    }
}

Example 85 with RecordCursor

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

the class JsonQueryProcessorState method onQuerySetupFirstRecord.

private boolean onQuerySetupFirstRecord() {
    if (skip > 0) {
        final RecordCursor cursor = this.cursor;
        long target = skip + 1;
        while (target > 0 && cursor.hasNext()) {
            target--;
        }
        if (target > 0) {
            return false;
        }
        count = skip;
    } else {
        if (!cursor.hasNext()) {
            return false;
        }
    }
    columnIndex = 0;
    record = cursor.getRecord();
    return true;
}