public void testAggregatesOnEmptyTable() throws IOException, ProcCallException {
String[] aggs = {"count", "sum", "min", "max"};
String[] tables = {"P1", "R1"};
for (String table : tables) {
Client client = getClient();
for (int i = 0; i < aggs.length; ++i) {
String query = String.format("select %s(%s.NUM) from %s", aggs[i], table, table);
VoltTable[] results = client.callProcedure("@AdHoc", query).getResults();
if (aggs[i].equals("count")) {
assertEquals(0, results[0].asScalarLong());
} else {
final VoltTableRow row = results[0].fetchRow(0);
row.get(0, results[0].getColumnType(0));
if (!isHSQL()) {
assertTrue(row.wasNull());
}
}
}
// Do avg separately since the column is a float and makes
// asScalarLong() unhappy
String query = String.format("select avg(%s.NUM) from %s", table, table);
VoltTable[] results = client.callProcedure("@AdHoc", query).getResults();
results[0].advanceRow();
@SuppressWarnings("unused")
final double value = ((Number) results[0].get(0, results[0].getColumnType(0))).doubleValue();
if (!isHSQL()) {
assertTrue(results[0].wasNull());
}
}
}
public VoltTable[] run(long rowid, long ignore) {
@SuppressWarnings("deprecation")
long txid = getVoltPrivateRealTransactionIdDontUseMe();
// Critical for proper determinism: get a cluster-wide consistent Random instance
Random rand = new Random(txid);
// Check if the record exists first
voltQueueSQL(check, rowid);
// Grab resultset for possibly existing record
VoltTable item = voltExecuteSQL()[0];
// If the record exist perform an update or delete
if (item.getRowCount() > 0) {
// Randomly decide whether to delete (or update) the record
if (rand.nextBoolean()) {
voltQueueSQL(delete, rowid);
// Export deletion
VoltTableRow row = item.fetchRow(0);
voltQueueSQL(
export,
txid,
rowid,
row.get(1, VoltType.TINYINT),
row.get(2, VoltType.TINYINT),
row.get(3, VoltType.TINYINT),
row.get(4, VoltType.SMALLINT),
row.get(5, VoltType.SMALLINT),
row.get(6, VoltType.INTEGER),
row.get(7, VoltType.INTEGER),
row.get(8, VoltType.BIGINT),
row.get(9, VoltType.BIGINT),
row.get(10, VoltType.TIMESTAMP),
row.get(11, VoltType.TIMESTAMP),
row.get(12, VoltType.FLOAT),
row.get(13, VoltType.FLOAT),
row.get(14, VoltType.DECIMAL),
row.get(15, VoltType.DECIMAL),
row.get(16, VoltType.STRING),
row.get(17, VoltType.STRING),
row.get(18, VoltType.STRING),
row.get(19, VoltType.STRING),
row.get(20, VoltType.STRING),
row.get(21, VoltType.STRING));
} else {
SampleRecord record = new SampleRecord(rowid, rand);
voltQueueSQL(
update,
record.type_null_tinyint,
record.type_not_null_tinyint,
record.type_null_smallint,
record.type_not_null_smallint,
record.type_null_integer,
record.type_not_null_integer,
record.type_null_bigint,
record.type_not_null_bigint,
record.type_null_timestamp,
record.type_not_null_timestamp,
record.type_null_float,
record.type_not_null_float,
record.type_null_decimal,
record.type_not_null_decimal,
record.type_null_varchar25,
record.type_not_null_varchar25,
record.type_null_varchar128,
record.type_not_null_varchar128,
record.type_null_varchar1024,
record.type_not_null_varchar1024,
rowid);
}
} else {
// Insert a new record
SampleRecord record = new SampleRecord(rowid, rand);
voltQueueSQL(
insert,
rowid,
record.rowid_group,
record.type_null_tinyint,
record.type_not_null_tinyint,
record.type_null_smallint,
record.type_not_null_smallint,
record.type_null_integer,
record.type_not_null_integer,
record.type_null_bigint,
record.type_not_null_bigint,
record.type_null_timestamp,
record.type_not_null_timestamp,
record.type_null_float,
record.type_not_null_float,
record.type_null_decimal,
record.type_not_null_decimal,
record.type_null_varchar25,
record.type_not_null_varchar25,
record.type_null_varchar128,
record.type_not_null_varchar128,
record.type_null_varchar1024,
record.type_not_null_varchar1024);
}
// Execute last SQL batch
voltExecuteSQL(true);
// Retun to caller
return null;
}