Package com.facebook.presto.spi

Examples of com.facebook.presto.spi.ColumnMetadata

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        checkArgument(tableHandle instanceof NativeTableHandle, "tableHandle is not an instance of NativeTableHandle");
        checkArgument(columnHandle instanceof NativeColumnHandle, "columnHandle is not an instance of NativeColumnHandle");

        long columnId = ((NativeColumnHandle) columnHandle).getColumnId();

        ColumnMetadata columnMetadata = dao.getColumnMetadata(columnId);
        checkState(columnMetadata != null, "no column with id %s exists", columnId);
        return columnMetadata;
    }
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    {
        checkNotNull(prefix, "prefix is null");

        ImmutableListMultimap.Builder<SchemaTableName, ColumnMetadata> columns = ImmutableListMultimap.builder();
        for (TableColumn tableColumn : dao.listTableColumns(catalogName, prefix.getSchemaName(), prefix.getTableName())) {
            ColumnMetadata columnMetadata = new ColumnMetadata(tableColumn.getColumnName(), tableColumn.getDataType().toColumnType(), tableColumn.getOrdinalPosition(), false);
            columns.put(tableColumn.getTable().asSchemaTableName(), columnMetadata);
        }
        // This is safe for a list multimap
        return (Map<SchemaTableName, List<ColumnMetadata>>) (Object) columns.build().asMap();
    }
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    private static ConnectorTableMetadata getTableMetadata(String schemaName, TpchTable<?> tpchTable)
    {
        ImmutableList.Builder<ColumnMetadata> columns = ImmutableList.builder();
        int ordinalPosition = 0;
        for (TpchColumn<? extends TpchEntity> column : tpchTable.getColumns()) {
            columns.add(new ColumnMetadata(column.getColumnName(), getPrestoType(column.getType()), ordinalPosition, false));
            ordinalPosition++;
        }
        columns.add(new ColumnMetadata(ROW_NUMBER_COLUMN_NAME, BIGINT, ordinalPosition, false, true));

        SchemaTableName tableName = new SchemaTableName(schemaName, tpchTable.getTableName());
        return new ConnectorTableMetadata(tableName, columns.build());
    }
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                        entry.getKey().getTableName());

                int ordinalPosition = 0;
                ImmutableList.Builder<ColumnMetadata> columns = ImmutableList.builder();
                for (ViewColumn column : deserializeView(entry.getValue()).getColumns()) {
                    columns.add(new ColumnMetadata(column.getName(), column.getType(), ordinalPosition, false));
                    ordinalPosition++;
                }

                tableColumns.put(tableName, columns.build());
            }
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        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
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    {
        // known table
        ConnectorTableMetadata tableMetadata = metadata.getTableMetadata(NUMBERS_TABLE_HANDLE);
        assertEquals(tableMetadata.getTable(), new SchemaTableName("example", "numbers"));
        assertEquals(tableMetadata.getColumns(), ImmutableList.of(
                new ColumnMetadata("text", STRING, 0, false),
                new ColumnMetadata("value", ColumnType.LONG, 1, false)));

        // unknown tables should produce null
        assertNull(metadata.getTableMetadata(new ExampleTableHandle(CONNECTOR_ID, "unknown", "unknown")));
        assertNull(metadata.getTableMetadata(new ExampleTableHandle(CONNECTOR_ID, "example", "unknown")));
        assertNull(metadata.getTableMetadata(new ExampleTableHandle(CONNECTOR_ID, "unknown", "numbers")));
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    @Test
    public void getColumnMetadata()
    {
        assertEquals(metadata.getColumnMetadata(NUMBERS_TABLE_HANDLE, new ExampleColumnHandle(CONNECTOR_ID, "text", STRING, 0)),
                new ColumnMetadata("text", STRING, 0, false));

        // example connector assumes that the table handle and column handle are
        // properly formed, so it will return a metadata object for any
        // ExampleTableHandle and ExampleColumnHandle passed in.  This is on because
        // it is not possible for the Presto Metadata system to create the handles
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    @Test(expectedExceptions = UnsupportedOperationException.class)
    public void testCreateTable()
    {
        metadata.createTable(new ConnectorTableMetadata(
                new SchemaTableName("example", "foo"),
                ImmutableList.of(new ColumnMetadata("text", STRING, 0, false))));
    }
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        return ordinalPosition;
    }

    public ColumnMetadata getColumnMetadata()
    {
        return new ColumnMetadata(columnName, columnType, ordinalPosition, false);
    }
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    }

    private static void assertPrimitiveField(Map<String, ColumnMetadata> map, int position, String name, Type type, boolean partitionKey)
    {
        assertTrue(map.containsKey(name));
        ColumnMetadata column = map.get(name);
        assertEquals(column.getOrdinalPosition(), position);
        assertEquals(column.getType(), type, name);
        assertEquals(column.isPartitionKey(), partitionKey, name);
    }
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Related Classes of com.facebook.presto.spi.ColumnMetadata

  • com.facebook.presto.AbstractTestQueries
  • com.facebook.presto.cassandra.CassandraColumnHandle
  • com.facebook.presto.cassandra.TestCassandraConnector
  • com.facebook.presto.connector.informationSchema.InformationSchemaDataStreamProvider
  • com.facebook.presto.connector.informationSchema.InformationSchemaMetadata
  • com.facebook.presto.connector.informationSchema.InformationSchemaPageSourceProvider
  • com.facebook.presto.connector.jmx.JmxColumnHandle
  • com.facebook.presto.connector.system.SystemDataStreamProvider
  • com.facebook.presto.connector.system.SystemRecordSetProvider
  • com.facebook.presto.connector.system.SystemTablesMetadata
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