public synchronized Object get(String name) {
Object o = map.get(name);
if (o == AvaticaParameter.DUMMY_VALUE) {
return null;
}
return o;
}
private ImmutableMap<String, JdbcTable> computeTables() {
Connection connection = null;
ResultSet resultSet = null;
try {
connection = dataSource.getConnection();
DatabaseMetaData metaData = connection.getMetaData();
resultSet = metaData.getTables(catalog, schema, null, null);
final ImmutableMap.Builder<String, JdbcTable> builder = ImmutableMap.builder();
while (resultSet.next()) {
final String tableName = resultSet.getString(3);
final String catalogName = resultSet.getString(1);
final String schemaName = resultSet.getString(2);
final String tableTypeName = resultSet.getString(4);
// Clean up table type. In particular, this ensures that 'SYSTEM TABLE',
// returned by Phoenix among others, maps to TableType.SYSTEM_TABLE.
// We know enum constants are upper-case without spaces, so we can't
// make things worse.
final String tableTypeName2 = tableTypeName.toUpperCase().replace(' ', '_');
final TableType tableType = Util.enumVal(TableType.class, tableTypeName2);
final JdbcTable table = new JdbcTable(this, catalogName, schemaName, tableName, tableType);
builder.put(tableName, table);
}
return builder.build();
} catch (SQLException e) {
throw new RuntimeException("Exception while reading tables", e);
} finally {
close(connection, null, resultSet);
}
}
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();
}
