public OperatorFactory createTableScanOperator(
Session session, int operatorId, String tableName, String... columnNames) {
checkArgument(session.getCatalog().isPresent(), "catalog not set");
checkArgument(session.getSchema().isPresent(), "schema not set");
// look up the table
QualifiedTableName qualifiedTableName =
new QualifiedTableName(session.getCatalog().get(), session.getSchema().get(), tableName);
TableHandle tableHandle = metadata.getTableHandle(session, qualifiedTableName).orElse(null);
checkArgument(tableHandle != null, "Table %s does not exist", qualifiedTableName);
// lookup the columns
Map<String, ColumnHandle> allColumnHandles = metadata.getColumnHandles(session, tableHandle);
ImmutableList.Builder<ColumnHandle> columnHandlesBuilder = ImmutableList.builder();
ImmutableList.Builder<Type> columnTypesBuilder = ImmutableList.builder();
for (String columnName : columnNames) {
ColumnHandle columnHandle = allColumnHandles.get(columnName);
checkArgument(
columnHandle != null, "Table %s does not have a column %s", tableName, columnName);
columnHandlesBuilder.add(columnHandle);
ColumnMetadata columnMetadata =
metadata.getColumnMetadata(session, tableHandle, columnHandle);
columnTypesBuilder.add(columnMetadata.getType());
}
List<ColumnHandle> columnHandles = columnHandlesBuilder.build();
List<Type> columnTypes = columnTypesBuilder.build();
// get the split for this table
List<TableLayoutResult> layouts =
metadata.getLayouts(session, tableHandle, Constraint.alwaysTrue(), Optional.empty());
Split split = getLocalQuerySplit(layouts.get(0).getLayout().getHandle());
return new OperatorFactory() {
@Override
public List<Type> getTypes() {
return columnTypes;
}
@Override
public Operator createOperator(DriverContext driverContext) {
OperatorContext operatorContext =
driverContext.addOperatorContext(operatorId, "BenchmarkSource");
ConnectorPageSource pageSource =
pageSourceManager.createPageSource(session, split, columnHandles);
return new PageSourceOperator(pageSource, columnTypes, operatorContext);
}
@Override
public void close() {}
};
}
public OperatorFactory createTableScanOperator(
final int operatorId, String tableName, String... columnNames) {
// look up the table
TableHandle tableHandle =
metadata
.getTableHandle(
session,
new QualifiedTableName(session.getCatalog(), session.getSchema(), tableName))
.orNull();
checkArgument(tableHandle != null, "Table %s does not exist", tableName);
// lookup the columns
ImmutableList.Builder<ColumnHandle> columnHandlesBuilder = ImmutableList.builder();
ImmutableList.Builder<Type> columnTypesBuilder = ImmutableList.builder();
for (String columnName : columnNames) {
ColumnHandle columnHandle = metadata.getColumnHandle(tableHandle, columnName).orNull();
checkArgument(
columnHandle != null, "Table %s does not have a column %s", tableName, columnName);
columnHandlesBuilder.add(columnHandle);
ColumnMetadata columnMetadata = metadata.getColumnMetadata(tableHandle, columnHandle);
columnTypesBuilder.add(columnMetadata.getType());
}
final List<ColumnHandle> columnHandles = columnHandlesBuilder.build();
final List<Type> columnTypes = columnTypesBuilder.build();
// get the split for this table
final Split split = getLocalQuerySplit(tableHandle);
return new OperatorFactory() {
@Override
public List<Type> getTypes() {
return columnTypes;
}
@Override
public Operator createOperator(DriverContext driverContext) {
OperatorContext operatorContext =
driverContext.addOperatorContext(operatorId, "BenchmarkSource");
return dataStreamProvider.createNewDataStream(operatorContext, split, columnHandles);
}
@Override
public void close() {}
};
}
