package sqlancer.h2;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import com.google.auto.service.AutoService;
import sqlancer.AbstractAction;
import sqlancer.DatabaseProvider;
import sqlancer.IgnoreMeException;
import sqlancer.Randomly;
import sqlancer.SQLConnection;
import sqlancer.SQLGlobalState;
import sqlancer.SQLProviderAdapter;
import sqlancer.StatementExecutor;
import sqlancer.common.query.SQLQueryAdapter;
import sqlancer.common.query.SQLQueryProvider;
import sqlancer.h2.H2Provider.H2GlobalState;
@AutoService(DatabaseProvider.class)
public class H2Provider extends SQLProviderAdapter {
public H2Provider() {
super(H2GlobalState.class, H2Options.class);
}
public enum Action implements AbstractAction {
INSERT(H2InsertGenerator::getQuery), //
INDEX(H2IndexGenerator::getQuery), //
ANALYZE((g) -> new SQLQueryAdapter("ANALYZE")), //
CREATE_VIEW(H2ViewGenerator::getQuery), //
UPDATE(H2UpdateGenerator::getQuery), //
DELETE(H2DeleteGenerator::getQuery), //
SET(H2SetGenerator::getQuery);
private final SQLQueryProvider sqlQueryProvider;
Action(SQLQueryProvider sqlQueryProvider) {
this.sqlQueryProvider = sqlQueryProvider;
}
@Override
public SQLQueryAdapter getQuery(H2GlobalState state) throws Exception {
return sqlQueryProvider.getQuery(state);
}
}
private static int mapActions(H2GlobalState globalState, Action a) {
Randomly r = globalState.getRandomly();
switch (a) {
case INSERT:
return r.getInteger(0, globalState.getOptions().getMaxNumberInserts());
case ANALYZE:
return r.getInteger(0, 5);
case INDEX:
case SET:
return r.getInteger(0, 5);
case CREATE_VIEW:
return r.getInteger(0, 2);
case UPDATE:
case DELETE:
return r.getInteger(0, 10);
default:
throw new AssertionError(a);
}
}
public static class H2GlobalState extends SQLGlobalState {
@Override
protected H2Schema readSchema() throws SQLException {
return H2Schema.fromConnection(getConnection(), getDatabaseName());
}
}
@Override
public void generateDatabase(H2GlobalState globalState) throws Exception {
if (Randomly.getBoolean()) {
H2SetGenerator.getQuery(globalState).execute(globalState);
}
boolean success;
for (int i = 0; i < Randomly.fromOptions(1, 2, 3); i++) {
do {
SQLQueryAdapter qt = new H2TableGenerator().getQuery(globalState);
success = globalState.executeStatement(qt);
} while (!success);
}
StatementExecutor se = new StatementExecutor<>(globalState, Action.values(),
H2Provider::mapActions, (q) -> {
if (globalState.getSchema().getDatabaseTables().isEmpty()) {
throw new IgnoreMeException();
}
});
se.executeStatements();
}
@Override
public SQLConnection createDatabase(H2GlobalState globalState) throws SQLException {
String connectionString = "jdbc:h2:~/" + globalState.getDatabaseName() + ";DB_CLOSE_ON_EXIT=FALSE";
Connection connection = DriverManager.getConnection(connectionString, "sa", "");
connection.createStatement().execute("DROP ALL OBJECTS DELETE FILES");
connection.close();
connection = DriverManager.getConnection(connectionString, "sa", "");
return new SQLConnection(connection);
}
@Override
public String getDBMSName() {
return "h2";
}
}