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How to use get_column_sets method in dbt-osmosis

Best Python code snippet using dbt-osmosis_python

osmosis.py

Source:osmosis.py

...1011        family_tree = self.build_node_ancestor_tree(node)1012        knowledge = self.inherit_column_level_knowledge(family_tree)1013        return knowledge1014    @staticmethod1015    def get_column_sets(1016        database_columns: Iterable[str],1017        yaml_columns: Iterable[str],1018        documented_columns: Iterable[str],1019    ) -> Tuple[List[str], List[str], List[str]]:1020        """Returns:1021        missing_columns: Columns in database not in dbt -- will be injected into schema file1022        undocumented_columns: Columns missing documentation -- descriptions will be inherited and injected into schema file where prior knowledge exists1023        extra_columns: Columns in schema file not in database -- will be removed from schema file1024        """1025        missing_columns = [1026            x for x in database_columns if x.lower() not in (y.lower() for y in yaml_columns)1027        ]1028        undocumented_columns = [1029            x for x in database_columns if x.lower() not in (y.lower() for y in documented_columns)1030        ]1031        extra_columns = [1032            x for x in yaml_columns if x.lower() not in (y.lower() for y in database_columns)1033        ]1034        return missing_columns, undocumented_columns, extra_columns1035    def propagate_documentation_downstream(self, force_inheritance: bool = False) -> None:1036        schema_map = self.build_schema_folder_mapping()1037        with self.adapter.connection_named("dbt-osmosis"):1038            for unique_id, node in track(list(self.filtered_models())):1039                logger().info("\n:point_right: Processing model: [bold]%s[/bold] \n", unique_id)1040                # Get schema file path, must exist to propagate documentation1041                schema_path: Optional[SchemaFileLocation] = schema_map.get(unique_id)1042                if schema_path is None or schema_path.current is None:1043                    logger().info(1044                        ":bow: No valid schema file found for model %s", unique_id1045                    )  # We can't take action1046                    continue1047                # Build Sets1048                database_columns: Set[str] = set(self.get_columns(node))1049                yaml_columns: Set[str] = set(column for column in node.columns)1050                if not database_columns:1051                    logger().info(1052                        ":safety_vest: Unable to resolve columns in database, falling back to using yaml columns as base column set\n"1053                    )1054                    database_columns = yaml_columns1055                # Get documentated columns1056                documented_columns: Set[str] = set(1057                    column1058                    for column, info in node.columns.items()1059                    if info.description and info.description not in self.placeholders1060                )1061                # Queue1062                missing_columns, undocumented_columns, extra_columns = self.get_column_sets(1063                    database_columns, yaml_columns, documented_columns1064                )1065                if force_inheritance:1066                    # Consider all columns "undocumented" so that inheritance is not selective1067                    undocumented_columns = database_columns1068                # Engage1069                n_cols_added = 01070                n_cols_doc_inherited = 01071                n_cols_removed = 01072                if len(missing_columns) > 0 or len(undocumented_columns) or len(extra_columns) > 0:1073                    schema_file = self.yaml_handler.load(schema_path.current)1074                    (1075                        n_cols_added,1076                        n_cols_doc_inherited,...

join.py

Source:join.py

...44    Represent a Node in the join tree data structure.45    Join nodes can be simple data sources, join expressions and queries.46    """47    @abstractmethod48    def get_column_sets(self) -> Mapping[str, ColumnSet]:49        raise NotImplementedError50    @abstractmethod51    def accept(self, visitor: JoinVisitor[TReturn, TSimpleDataSource]) -> TReturn:52        raise NotImplementedError53    @abstractmethod54    def get_alias_node_map(self) -> Mapping[str, IndividualNode[TSimpleDataSource]]:55        raise NotImplementedError56@dataclass(frozen=True)57class IndividualNode(JoinNode[TSimpleDataSource], Generic[TSimpleDataSource]):58    """59    Join node that represent an individual data source: an entity/table60    or a subquery.61    It also assign an alias to a node in a join expression.62    The alias is used in the join condition and in all the expressions63    that rely on the join in the query.64    """65    alias: str66    data_source: Union[TSimpleDataSource, ProcessableQuery[TSimpleDataSource]]67    def get_alias_node_map(self) -> Mapping[str, IndividualNode[TSimpleDataSource]]:68        return {self.alias: self}69    def get_column_sets(self) -> Mapping[str, ColumnSet]:70        return (71            {self.alias: self.data_source.get_columns()}72            if self.alias is not None73            else {}74        )75    def accept(self, visitor: JoinVisitor[TReturn, TSimpleDataSource]) -> TReturn:76        return visitor.visit_individual_node(self)77def entity_from_node(node: IndividualNode[Entity]) -> EntityKey:78    assert isinstance(node.data_source, Entity)79    return node.data_source.key80class JoinConditionExpression(NamedTuple):81    """82    Represent one qualified column [alias.column] in the83    ON clause within the join expression.84    """85    table_alias: str86    column: str87class JoinCondition(NamedTuple):88    """89    Represents a condition in the ON clause in the JOIN expression.90    """91    left: JoinConditionExpression92    right: JoinConditionExpression93@dataclass(frozen=True)94class JoinClause(DataSource, JoinNode[TSimpleDataSource], Generic[TSimpleDataSource]):95    """96    Joins two JoinNodes.97    For a simple join between two entities/tables or two subqueries, both98    left and right node are IndividualNodes.99    For a more complex joins between multiple nodes, nodes are associative100    on the left:101    `(a INNER JOIN b ON condition) INNER JOIN c ON condition`102    This means the left node can be a join on its own while the right node103    still needs to be an IndividualNode.104    """105    left_node: JoinNode[TSimpleDataSource]106    right_node: IndividualNode[TSimpleDataSource]107    keys: Sequence[JoinCondition]108    join_type: JoinType109    join_modifier: Optional[JoinModifier] = None110    def get_column_sets(self) -> Mapping[str, ColumnSet]:111        return {112            **self.left_node.get_column_sets(),113            **self.right_node.get_column_sets(),114        }115    def get_columns(self) -> ColumnSet:116        return QualifiedColumnSet(self.get_column_sets())117    def get_alias_node_map(self) -> Mapping[str, IndividualNode[TSimpleDataSource]]:118        return {119            **self.left_node.get_alias_node_map(),120            **self.right_node.get_alias_node_map(),121        }122    def __post_init__(self) -> None:123        column_set = self.get_columns()124        for condition in self.keys:125            assert f"{condition.left.table_alias}.{condition.left.column}" in column_set126            assert (127                f"{condition.right.table_alias}.{condition.right.column}" in column_set128            )129    def accept(self, visitor: JoinVisitor[TReturn, TSimpleDataSource]) -> TReturn:130        return visitor.visit_join_clause(self)...

test_join.py

Source:test_join.py

...20GROUPS_ASSIGNEE = ColumnSet([("id", UInt(32)), ("user", String())])21def test_entity_node() -> None:22    e = Entity(key=EntityKey.EVENTS, schema=ERRORS_SCHEMA)23    node = IndividualNode(alias="err", data_source=e)24    assert node.get_column_sets() == {"err": e.schema}25def test_simple_join() -> None:26    e = Entity(key=EntityKey.EVENTS, schema=ERRORS_SCHEMA)27    node_err = IndividualNode(alias="err", data_source=e)28    g = Entity(key=EntityKey.GROUPEDMESSAGE, schema=GROUPS_SCHEMA)29    node_group = IndividualNode(alias="groups", data_source=g)30    join = JoinClause(31        left_node=node_err,32        right_node=node_group,33        keys=[34            JoinCondition(35                left=JoinConditionExpression("err", "group_id"),36                right=JoinConditionExpression("groups", "id"),37            )38        ],39        join_type=JoinType.INNER,40        join_modifier=JoinModifier.SEMI,41    )42    assert join.get_column_sets() == {"err": ERRORS_SCHEMA, "groups": GROUPS_SCHEMA}43    joined_cols = join.get_columns()44    assert "err.group_id" in joined_cols45    assert "err.event_id" in joined_cols46    assert "groups.id" in joined_cols47    assert "groups.message" in joined_cols48    with pytest.raises(AssertionError):49        JoinClause(50            left_node=node_err,51            right_node=node_group,52            keys=[53                JoinCondition(54                    left=JoinConditionExpression("err", "missing_col"),55                    right=JoinConditionExpression("groups", "another_missing_col"),56                )57            ],58            join_type=JoinType.INNER,59        )60def test_complex_joins() -> None:61    e = Entity(key=EntityKey.EVENTS, schema=ERRORS_SCHEMA)62    node_err = IndividualNode(alias="err", data_source=e)63    g = Entity(key=EntityKey.GROUPEDMESSAGE, schema=GROUPS_SCHEMA)64    node_group = IndividualNode(alias="groups", data_source=g)65    a = Entity(key=EntityKey.GROUPASSIGNEE, schema=GROUPS_ASSIGNEE)66    query = Query(67        from_clause=a,68        selected_columns=[69            SelectedExpression("id", Column("id", None, "id")),70            SelectedExpression("assigned_user", Column("assigned_user", None, "user")),71        ],72    )73    node_query = IndividualNode(alias="assignee", data_source=query)74    join = JoinClause(75        left_node=JoinClause(76            left_node=node_err,77            right_node=node_group,78            keys=[79                JoinCondition(80                    left=JoinConditionExpression("err", "group_id"),81                    right=JoinConditionExpression("groups", "id"),82                )83            ],84            join_type=JoinType.INNER,85        ),86        right_node=node_query,87        keys=[88            JoinCondition(89                left=JoinConditionExpression("err", "group_id"),90                right=JoinConditionExpression("assignee", "id"),91            )92        ],93        join_type=JoinType.INNER,94    )95    assert join.get_column_sets() == {96        "err": ERRORS_SCHEMA,97        "assignee": ColumnSet([("id", Any()), ("assigned_user", Any())]),98        "groups": GROUPS_SCHEMA,...

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