superset sql_lab 源码

superset sql_lab 代码

文件路径：/superset/models/sql_lab.py

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# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
"""A collection of ORM sqlalchemy models for SQL Lab"""
import inspect
import logging
import re
from datetime import datetime
from typing import Any, Dict, List, Optional, Type, TYPE_CHECKING

import simplejson as json
import sqlalchemy as sqla
from flask import current_app, Markup
from flask_appbuilder import Model
from flask_appbuilder.models.decorators import renders
from humanize import naturaltime
from sqlalchemy import (
    Boolean,
    Column,
    DateTime,
    Enum,
    ForeignKey,
    Integer,
    Numeric,
    String,
    Text,
)
from sqlalchemy.engine.url import URL
from sqlalchemy.orm import backref, relationship

from superset import security_manager
from superset.jinja_context import BaseTemplateProcessor, get_template_processor
from superset.models.helpers import (
    AuditMixinNullable,
    ExploreMixin,
    ExtraJSONMixin,
    ImportExportMixin,
)
from superset.sql_parse import CtasMethod, ParsedQuery, Table
from superset.sqllab.limiting_factor import LimitingFactor
from superset.utils.core import GenericDataType, QueryStatus, user_label

if TYPE_CHECKING:
    from superset.db_engine_specs import BaseEngineSpec


logger = logging.getLogger(__name__)


class Query(
    Model, ExtraJSONMixin, ExploreMixin
):  # pylint: disable=abstract-method,too-many-public-methods
    """ORM model for SQL query

    Now that SQL Lab support multi-statement execution, an entry in this
    table may represent multiple SQL statements executed sequentially"""

    __tablename__ = "query"
    type = "query"
    id = Column(Integer, primary_key=True)
    client_id = Column(String(11), unique=True, nullable=False)
    query_language = "sql"
    database_id = Column(Integer, ForeignKey("dbs.id"), nullable=False)

    # Store the tmp table into the DB only if the user asks for it.
    tmp_table_name = Column(String(256))
    tmp_schema_name = Column(String(256))
    user_id = Column(Integer, ForeignKey("ab_user.id"), nullable=True)
    status = Column(String(16), default=QueryStatus.PENDING)
    tab_name = Column(String(256))
    sql_editor_id = Column(String(256))
    schema = Column(String(256))
    sql = Column(Text)
    # Query to retrieve the results,
    # used only in case of select_as_cta_used is true.
    select_sql = Column(Text)
    executed_sql = Column(Text)
    # Could be configured in the superset config.
    limit = Column(Integer)
    limiting_factor = Column(
        Enum(LimitingFactor), server_default=LimitingFactor.UNKNOWN
    )
    select_as_cta = Column(Boolean)
    select_as_cta_used = Column(Boolean, default=False)
    ctas_method = Column(String(16), default=CtasMethod.TABLE)

    progress = Column(Integer, default=0)  # 1..100
    # # of rows in the result set or rows modified.
    rows = Column(Integer)
    error_message = Column(Text)
    # key used to store the results in the results backend
    results_key = Column(String(64), index=True)

    # Using Numeric in place of DateTime for sub-second precision
    # stored as seconds since epoch, allowing for milliseconds
    start_time = Column(Numeric(precision=20, scale=6))
    start_running_time = Column(Numeric(precision=20, scale=6))
    end_time = Column(Numeric(precision=20, scale=6))
    end_result_backend_time = Column(Numeric(precision=20, scale=6))
    tracking_url_raw = Column(Text, name="tracking_url")

    changed_on = Column(
        DateTime, default=datetime.utcnow, onupdate=datetime.utcnow, nullable=True
    )

    database = relationship(
        "Database",
        foreign_keys=[database_id],
        backref=backref("queries", cascade="all, delete-orphan"),
    )
    user = relationship(security_manager.user_model, foreign_keys=[user_id])

    __table_args__ = (sqla.Index("ti_user_id_changed_on", user_id, changed_on),)

    def get_template_processor(self, **kwargs: Any) -> BaseTemplateProcessor:
        return get_template_processor(query=self, database=self.database, **kwargs)

    def to_dict(self) -> Dict[str, Any]:
        return {
            "changedOn": self.changed_on,
            "changed_on": self.changed_on.isoformat(),
            "dbId": self.database_id,
            "db": self.database.database_name if self.database else None,
            "endDttm": self.end_time,
            "errorMessage": self.error_message,
            "executedSql": self.executed_sql,
            "id": self.client_id,
            "queryId": self.id,
            "limit": self.limit,
            "limitingFactor": self.limiting_factor,
            "progress": self.progress,
            "rows": self.rows,
            "schema": self.schema,
            "ctas": self.select_as_cta,
            "serverId": self.id,
            "sql": self.sql,
            "sqlEditorId": self.sql_editor_id,
            "startDttm": self.start_time,
            "state": self.status.lower(),
            "tab": self.tab_name,
            "tempSchema": self.tmp_schema_name,
            "tempTable": self.tmp_table_name,
            "userId": self.user_id,
            "user": user_label(self.user),
            "resultsKey": self.results_key,
            "trackingUrl": self.tracking_url,
            "extra": self.extra,
        }

    @property
    def name(self) -> str:
        """Name property"""
        ts = datetime.now().isoformat()
        ts = ts.replace("-", "").replace(":", "").split(".")[0]
        tab = self.tab_name.replace(" ", "_").lower() if self.tab_name else "notab"
        tab = re.sub(r"\W+", "", tab)
        return f"sqllab_{tab}_{ts}"

    @property
    def database_name(self) -> str:
        return self.database.name

    @property
    def username(self) -> str:
        return self.user.username

    @property
    def sql_tables(self) -> List[Table]:
        return list(ParsedQuery(self.sql).tables)

    @property
    def columns(self) -> List[Dict[str, Any]]:
        bool_types = ("BOOL",)
        num_types = (
            "DOUBLE",
            "FLOAT",
            "INT",
            "BIGINT",
            "NUMBER",
            "LONG",
            "REAL",
            "NUMERIC",
            "DECIMAL",
            "MONEY",
        )
        date_types = ("DATE", "TIME")
        str_types = ("VARCHAR", "STRING", "CHAR")
        columns = []
        col_type = ""
        for col in self.extra.get("columns", []):
            computed_column = {**col}
            col_type = col.get("type")

            if col_type and any(map(lambda t: t in col_type.upper(), str_types)):
                computed_column["type_generic"] = GenericDataType.STRING
            if col_type and any(map(lambda t: t in col_type.upper(), bool_types)):
                computed_column["type_generic"] = GenericDataType.BOOLEAN
            if col_type and any(map(lambda t: t in col_type.upper(), num_types)):
                computed_column["type_generic"] = GenericDataType.NUMERIC
            if col_type and any(map(lambda t: t in col_type.upper(), date_types)):
                computed_column["type_generic"] = GenericDataType.TEMPORAL

            computed_column["column_name"] = col.get("name")
            computed_column["groupby"] = True
            columns.append(computed_column)
        return columns

    @property
    def data(self) -> Dict[str, Any]:
        order_by_choices = []
        for col in self.columns:
            column_name = str(col.get("column_name") or "")
            order_by_choices.append(
                (json.dumps([column_name, True]), column_name + " [asc]")
            )
            order_by_choices.append(
                (json.dumps([column_name, False]), column_name + " [desc]")
            )

        return {
            "time_grain_sqla": [
                (g.duration, g.name) for g in self.database.grains() or []
            ],
            "filter_select": True,
            "name": self.tab_name,
            "columns": self.columns,
            "metrics": [],
            "id": self.id,
            "type": self.type,
            "sql": self.sql,
            "owners": self.owners_data,
            "database": {"id": self.database_id, "backend": self.database.backend},
            "order_by_choices": order_by_choices,
        }

    def raise_for_access(self) -> None:
        """
        Raise an exception if the user cannot access the resource.

        :raises SupersetSecurityException: If the user cannot access the resource
        """

        security_manager.raise_for_access(query=self)

    @property
    def db_engine_spec(self) -> Type["BaseEngineSpec"]:
        return self.database.db_engine_spec

    @property
    def owners_data(self) -> List[Dict[str, Any]]:
        return []

    @property
    def uid(self) -> str:
        return f"{self.id}__{self.type}"

    @property
    def is_rls_supported(self) -> bool:
        return False

    @property
    def cache_timeout(self) -> int:
        return 0

    @property
    def column_names(self) -> List[Any]:
        return [col.get("column_name") for col in self.columns]

    @property
    def offset(self) -> int:
        return 0

    @property
    def main_dttm_col(self) -> Optional[str]:
        for col in self.columns:
            if col.get("is_dttm"):
                return col.get("column_name")
        return None

    @property
    def dttm_cols(self) -> List[Any]:
        return [col.get("column_name") for col in self.columns if col.get("is_dttm")]

    @property
    def schema_perm(self) -> str:
        return f"{self.database.database_name}.{self.schema}"

    @property
    def perm(self) -> str:
        return f"[{self.database.database_name}].[{self.tab_name}](id:{self.id})"

    @property
    def default_endpoint(self) -> str:
        return ""

    @staticmethod
    def get_extra_cache_keys(query_obj: Dict[str, Any]) -> List[str]:
        return []

    @property
    def tracking_url(self) -> Optional[str]:
        """
        Transfrom tracking url at run time because the exact URL may depends
        on query properties such as execution and finish time.
        """
        transform = current_app.config.get("TRACKING_URL_TRANSFORMER")
        url = self.tracking_url_raw
        if url and transform:
            sig = inspect.signature(transform)
            # for backward compatibility, users may define a transformer function
            # with only one parameter (`url`).
            args = [url, self][: len(sig.parameters)]
            url = transform(*args)
            logger.debug("Transformed tracking url: %s", url)
        return url

    @tracking_url.setter
    def tracking_url(self, value: str) -> None:
        self.tracking_url_raw = value

    def get_column(self, column_name: Optional[str]) -> Optional[Dict[str, Any]]:
        if not column_name:
            return None
        for col in self.columns:
            if col.get("column_name") == column_name:
                return col
        return None


class SavedQuery(Model, AuditMixinNullable, ExtraJSONMixin, ImportExportMixin):
    """ORM model for SQL query"""

    __tablename__ = "saved_query"
    id = Column(Integer, primary_key=True)
    user_id = Column(Integer, ForeignKey("ab_user.id"), nullable=True)
    db_id = Column(Integer, ForeignKey("dbs.id"), nullable=True)
    schema = Column(String(128))
    label = Column(String(256))
    description = Column(Text)
    sql = Column(Text)
    template_parameters = Column(Text)
    user = relationship(
        security_manager.user_model,
        backref=backref("saved_queries", cascade="all, delete-orphan"),
        foreign_keys=[user_id],
    )
    database = relationship(
        "Database",
        foreign_keys=[db_id],
        backref=backref("saved_queries", cascade="all, delete-orphan"),
    )
    rows = Column(Integer, nullable=True)
    last_run = Column(DateTime, nullable=True)

    export_parent = "database"
    export_fields = [
        "schema",
        "label",
        "description",
        "sql",
    ]

    def __repr__(self) -> str:
        return str(self.label)

    def to_dict(self) -> Dict[str, Any]:
        return {
            "id": self.id,
        }

    @property
    def pop_tab_link(self) -> Markup:
        return Markup(
            f"""
            <a href="/superset/sqllab?savedQueryId={self.id}">
                <i class="fa fa-link"></i>
            </a>
        """
        )

    @property
    def user_email(self) -> str:
        return self.user.email

    @property
    def sqlalchemy_uri(self) -> URL:
        return self.database.sqlalchemy_uri

    def url(self) -> str:
        return "/superset/sqllab?savedQueryId={0}".format(self.id)

    @property
    def sql_tables(self) -> List[Table]:
        return list(ParsedQuery(self.sql).tables)

    @property
    def last_run_humanized(self) -> str:
        return naturaltime(datetime.now() - self.changed_on)

    @property
    def _last_run_delta_humanized(self) -> str:
        return naturaltime(datetime.now() - self.changed_on)

    @renders("changed_on")
    def last_run_delta_humanized(self) -> str:
        return self._last_run_delta_humanized


class TabState(Model, AuditMixinNullable, ExtraJSONMixin):

    __tablename__ = "tab_state"

    # basic info
    id = Column(Integer, primary_key=True, autoincrement=True)
    user_id = Column(Integer, ForeignKey("ab_user.id"))
    label = Column(String(256))
    active = Column(Boolean, default=False)

    # selected DB and schema
    database_id = Column(Integer, ForeignKey("dbs.id", ondelete="CASCADE"))
    database = relationship("Database", foreign_keys=[database_id])
    schema = Column(String(256))

    # tables that are open in the schema browser and their data previews
    table_schemas = relationship(
        "TableSchema",
        cascade="all, delete-orphan",
        backref="tab_state",
        passive_deletes=True,
    )

    # the query in the textarea, and results (if any)
    sql = Column(Text)
    query_limit = Column(Integer)

    # latest query that was run
    latest_query_id = Column(
        Integer, ForeignKey("query.client_id", ondelete="SET NULL")
    )
    latest_query = relationship("Query")

    # other properties
    autorun = Column(Boolean, default=False)
    template_params = Column(Text)
    hide_left_bar = Column(Boolean, default=False)

    # any saved queries that are associated with the Tab State
    saved_query_id = Column(
        Integer, ForeignKey("saved_query.id", ondelete="SET NULL"), nullable=True
    )
    saved_query = relationship("SavedQuery", foreign_keys=[saved_query_id])

    def to_dict(self) -> Dict[str, Any]:
        return {
            "id": self.id,
            "user_id": self.user_id,
            "label": self.label,
            "active": self.active,
            "database_id": self.database_id,
            "schema": self.schema,
            "table_schemas": [ts.to_dict() for ts in self.table_schemas],
            "sql": self.sql,
            "query_limit": self.query_limit,
            "latest_query": self.latest_query.to_dict() if self.latest_query else None,
            "autorun": self.autorun,
            "template_params": self.template_params,
            "hide_left_bar": self.hide_left_bar,
            "saved_query": self.saved_query.to_dict() if self.saved_query else None,
        }


class TableSchema(Model, AuditMixinNullable, ExtraJSONMixin):

    __tablename__ = "table_schema"

    id = Column(Integer, primary_key=True, autoincrement=True)
    tab_state_id = Column(Integer, ForeignKey("tab_state.id", ondelete="CASCADE"))

    database_id = Column(
        Integer, ForeignKey("dbs.id", ondelete="CASCADE"), nullable=False
    )
    database = relationship("Database", foreign_keys=[database_id])
    schema = Column(String(256))
    table = Column(String(256))

    # JSON describing the schema, partitions, latest partition, etc.
    description = Column(Text)

    expanded = Column(Boolean, default=False)

    def to_dict(self) -> Dict[str, Any]:
        try:
            description = json.loads(self.description)
        except json.JSONDecodeError:
            description = None

        return {
            "id": self.id,
            "tab_state_id": self.tab_state_id,
            "database_id": self.database_id,
            "schema": self.schema,
            "table": self.table,
            "description": description,
            "expanded": self.expanded,
        }

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