DataContextImpl(OptiqConnectionImpl connection, List<Object> parameterValues) {
this.queryProvider = connection;
this.typeFactory = connection.getTypeFactory();
this.rootSchema = connection.rootSchema;
// Store the time at which the query started executing. The SQL
// standard says that functions such as CURRENT_TIMESTAMP return the
// same value throughout the query.
final long time = System.currentTimeMillis();
final TimeZone timeZone = connection.getTimeZone();
final long localOffset = timeZone.getOffset(time);
final long currentOffset = localOffset;
ImmutableMap.Builder<Object, Object> builder = ImmutableMap.builder();
builder
.put("utcTimestamp", time)
.put("currentTimestamp", time + currentOffset)
.put("localTimestamp", time + localOffset)
.put("timeZone", timeZone);
for (Ord<Object> value : Ord.zip(parameterValues)) {
Object e = value.e;
if (e == null) {
e = AvaticaParameter.DUMMY_VALUE;
}
builder.put("?" + value.i, e);
}
map = builder.build();
}
/** Creates a JDBC data source with the given specification. */
public static DataSource dataSource(
String url, String driverClassName, String username, String password) {
if (url.startsWith("jdbc:hsqldb:")) {
// Prevent hsqldb from screwing up java.util.logging.
System.setProperty("hsqldb.reconfig_logging", "false");
}
BasicDataSource dataSource = new BasicDataSource();
dataSource.setUrl(url);
dataSource.setUsername(username);
dataSource.setPassword(password);
dataSource.setDriverClassName(driverClassName);
return dataSource;
}