Implement create view as functionality

Implement create view as button in sqllab

Make CVAS configurable

UPDATING.md

@@ -30,7 +30,9 @@ assists people when migrating to a new version.
 
 * [9786](https://github.com/apache/incubator-superset/pull/9786): with the upgrade of `werkzeug` from version `0.16.0` to `1.0.1`, the `werkzeug.contrib.cache` module has been moved to a standalone package [cachelib](https://pypi.org/project/cachelib/). For example, to import the `RedisCache` class, please use the following import: `from cachelib.redis import RedisCache`.
 
-* [9572](https://github.com/apache/incubator-superset/pull/9572): a change which by defau;t means that the Jinja `current_user_id`, `current_username`, and `url_param` context calls no longer need to be wrapped via `cache_key_wrapper` in order to be included in the cache key. The `cache_key_wrapper` function should only be required for Jinja add-ons.
+* [9794](https://github.com/apache/incubator-superset/pull/9794): introduces `create view as` functionality in the sqllab. This change will require the `query` table migration and potential service downtime as that table has quite some traffic.
+
+* [9572](https://github.com/apache/incubator-superset/pull/9572): a change which by default means that the Jinja `current_user_id`, `current_username`, and `url_param` context calls no longer need to be wrapped via `cache_key_wrapper` in order to be included in the cache key. The `cache_key_wrapper` function should only be required for Jinja add-ons.
 
 * [8867](https://github.com/apache/incubator-superset/pull/8867): a change which adds the `tmp_schema_name` column to the `query` table which requires locking the table. Given the `query` table is heavily used performance may be degraded during the migration. Scheduled downtime may be advised.
 

requirements-dev.txt

@@ -22,6 +22,7 @@ ipdb==0.12
 isort==4.3.21
 mypy==0.770
 nose==1.3.7
+parameterized==0.7.4
 pip-tools==5.1.2
 pre-commit==1.17.0
 psycopg2-binary==2.8.5

superset-frontend/src/SqlLab/actions/sqlLab.js

@@ -97,6 +97,11 @@ export const addSuccessToast = addSuccessToastAction;
 export const addDangerToast = addDangerToastAction;
 export const addWarningToast = addWarningToastAction;
 
+export const CtasEnum = {
+  TABLE: 'TABLE',
+  VIEW: 'VIEW',
+};
+
 // a map of SavedQuery field names to the different names used client-side,
 // because for now making the names consistent is too complicated
 // so it might as well only happen in one place
@@ -346,6 +351,7 @@ export function runQuery(query) {
       tab: query.tab,
       tmp_table_name: query.tempTableName,
       select_as_cta: query.ctas,
+      ctas_method: query.ctas_method,
       templateParams: query.templateParams,
       queryLimit: query.queryLimit,
       expand_data: true,

superset-frontend/src/SqlLab/components/ResultSet.jsx

@@ -30,6 +30,7 @@ import FilterableTable from '../../components/FilterableTable/FilterableTable';
 import QueryStateLabel from './QueryStateLabel';
 import CopyToClipboard from '../../components/CopyToClipboard';
 import { prepareCopyToClipboardTabularData } from '../../utils/common';
+import { CtasEnum } from '../actions/sqlLab';
 
 const propTypes = {
   actions: PropTypes.object,
@@ -219,10 +220,14 @@ export default class ResultSet extends React.PureComponent {
         tmpTable = query.results.query.tempTable;
         tmpSchema = query.results.query.tempSchema;
       }
+      let object = 'Table';
+      if (query.ctas_method === CtasEnum.VIEW) {
+        object = 'View';
+      }
       return (
         <div>
           <Alert bsStyle="info">
-            {t('Table')} [
+            {t(object)} [
             <strong>
               {tmpSchema}.{tmpTable}
             </strong>

superset-frontend/src/SqlLab/components/SqlEditor.jsx

@@ -54,6 +54,7 @@ import {
 } from '../constants';
 import RunQueryActionButton from './RunQueryActionButton';
 import { FeatureFlag, isFeatureEnabled } from '../../featureFlags';
+import { CtasEnum } from '../actions/sqlLab';
 
 const SQL_EDITOR_PADDING = 10;
 const INITIAL_NORTH_PERCENT = 30;
@@ -284,7 +285,7 @@ class SqlEditor extends React.PureComponent {
       this.startQuery();
     }
   }
-  startQuery(ctas = false) {
+  startQuery(ctas = false, ctas_method = CtasEnum.TABLE) {
     const qe = this.props.queryEditor;
     const query = {
       dbId: qe.dbId,
@@ -299,6 +300,7 @@ class SqlEditor extends React.PureComponent {
         ? this.props.database.allow_run_async
         : false,
       ctas,
+      ctas_method,
       updateTabState: !qe.selectedText,
     };
     this.props.actions.runQuery(query);
@@ -313,7 +315,10 @@ class SqlEditor extends React.PureComponent {
     }
   }
   createTableAs() {
-    this.startQuery(true);
+    this.startQuery(true, CtasEnum.TABLE);
+  }
+  createViewAs() {
+    this.startQuery(true, CtasEnum.VIEW);
   }
   ctasChanged(event) {
     this.setState({ ctas: event.target.value });
@@ -372,8 +377,13 @@ class SqlEditor extends React.PureComponent {
   }
   renderEditorBottomBar(hotkeys) {
     let ctasControls;
-    if (this.props.database && this.props.database.allow_ctas) {
+    if (
+      this.props.database &&
+      (this.props.database.allow_ctas || this.props.database.allow_cvas)
+    ) {
       const ctasToolTip = t('Create table as with query results');
+      const cvasToolTip = t('Create view as with query results');
+
       ctasControls = (
         <FormGroup>
           <InputGroup>
@@ -385,14 +395,26 @@ class SqlEditor extends React.PureComponent {
               onChange={this.ctasChanged.bind(this)}
             />
             <InputGroup.Button>
-              <Button
-                bsSize="small"
-                disabled={this.state.ctas.length === 0}
-                onClick={this.createTableAs.bind(this)}
-                tooltip={ctasToolTip}
-              >
-                <i className="fa fa-table" /> CTAS
-              </Button>
+              {this.props.database.allow_ctas && (
+                <Button
+                  bsSize="small"
+                  disabled={this.state.ctas.length === 0}
+                  onClick={this.createTableAs.bind(this)}
+                  tooltip={ctasToolTip}
+                >
+                  <i className="fa fa-table" /> CTAS
+                </Button>
+              )}
+              {this.props.database.allow_cvas && (
+                <Button
+                  bsSize="small"
+                  disabled={this.state.ctas.length === 0}
+                  onClick={this.createViewAs.bind(this)}
+                  tooltip={cvasToolTip}
+                >
+                  <i className="fa fa-table" /> CVAS
+                </Button>
+              )}
             </InputGroup.Button>
           </InputGroup>
         </FormGroup>

superset/migrations/versions/ea396d202291_ctas_method_in_query.py

@@ -0,0 +1,42 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# 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.
+"""Add ctas_method to the Query object
+
+Revision ID: ea396d202291
+Revises: e557699a813e
+Create Date: 2020-05-12 12:59:26.583276
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = "ea396d202291"
+down_revision = "e557699a813e"
+
+import sqlalchemy as sa
+from alembic import op
+
+
+def upgrade():
+    op.add_column(
+        "query", sa.Column("ctas_method", sa.String(length=16), nullable=True)
+    )
+    op.add_column("dbs", sa.Column("allow_cvas", sa.Boolean(), nullable=True))
+
+
+def downgrade():
+    op.drop_column("query", "ctas_method")
+    op.drop_column("dbs", "allow_cvas")

superset/models/core.py

@@ -118,6 +118,7 @@ class Database(
     allow_run_async = Column(Boolean, default=False)
     allow_csv_upload = Column(Boolean, default=False)
     allow_ctas = Column(Boolean, default=False)
+    allow_cvas = Column(Boolean, default=False)
     allow_dml = Column(Boolean, default=False)
     force_ctas_schema = Column(String(250))
     allow_multi_schema_metadata_fetch = Column(  # pylint: disable=invalid-name
@@ -147,6 +148,7 @@ class Database(
         "expose_in_sqllab",
         "allow_run_async",
         "allow_ctas",
+        "allow_cvas",
         "allow_csv_upload",
         "extra",
     ]

superset/models/sql_lab.py

@@ -19,7 +19,6 @@
 from datetime import datetime
 from typing import Any, Dict
 
-# pylint: disable=ungrouped-imports
 import simplejson as json
 import sqlalchemy as sqla
 from flask import Markup
@@ -40,6 +39,7 @@
 from superset import security_manager
 from superset.models.helpers import AuditMixinNullable, ExtraJSONMixin
 from superset.models.tags import QueryUpdater
+from superset.sql_parse import CtasMethod
 from superset.utils.core import QueryStatus, user_label
 
 
@@ -72,6 +72,7 @@ class Query(Model, ExtraJSONMixin):
     limit = Column(Integer)
     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.

superset/sql_lab.py

@@ -223,7 +223,9 @@ def execute_sql_statement(
                 query.user_id, start_dttm.strftime("%Y_%m_%d_%H_%M_%S")
             )
         sql = parsed_query.as_create_table(
-            query.tmp_table_name, schema_name=query.tmp_schema_name
+            query.tmp_table_name,
+            schema_name=query.tmp_schema_name,
+            method=query.ctas_method,
         )
         query.select_as_cta_used = True
 

superset/sql_parse.py

@@ -16,6 +16,7 @@
 # under the License.
 import logging
 from dataclasses import dataclass
+from enum import Enum
 from typing import List, Optional, Set
 from urllib import parse
 
@@ -31,6 +32,11 @@
 logger = logging.getLogger(__name__)
 
 
+class CtasMethod(str, Enum):
+    TABLE = "TABLE"
+    VIEW = "VIEW"
+
+
 def _extract_limit_from_query(statement: TokenList) -> Optional[int]:
     """
     Extract limit clause from SQL statement.
@@ -185,6 +191,7 @@ def as_create_table(
         table_name: str,
         schema_name: Optional[str] = None,
         overwrite: bool = False,
+        method: CtasMethod = CtasMethod.TABLE,
     ) -> str:
         """Reformats the query into the create table as query.
 
@@ -193,15 +200,16 @@ def as_create_table(
         :param table_name: table that will contain the results of the query execution
         :param schema_name: schema name for the target table
         :param overwrite: table_name will be dropped if true
+        :param method: method for the CTA query, currently view or table creation
         :return: Create table as query
         """
         exec_sql = ""
         sql = self.stripped()
         # TODO(bkyryliuk): quote full_table_name
         full_table_name = f"{schema_name}.{table_name}" if schema_name else table_name
         if overwrite:
-            exec_sql = f"DROP TABLE IF EXISTS {full_table_name};\n"
-        exec_sql += f"CREATE TABLE {full_table_name} AS \n{sql}"
+            exec_sql = f"DROP {method} IF EXISTS {full_table_name};\n"
+        exec_sql += f"CREATE {method} {full_table_name} AS \n{sql}"
         return exec_sql
 
     def _extract_from_token(  # pylint: disable=too-many-branches

superset/views/core.py

@@ -81,7 +81,7 @@
     check_sqlalchemy_uri,
     DBSecurityException,
 )
-from superset.sql_parse import ParsedQuery, Table
+from superset.sql_parse import CtasMethod, ParsedQuery, Table
 from superset.sql_validators import get_validator_by_name
 from superset.typing import FlaskResponse
 from superset.utils import core as utils, dashboard_import_export
@@ -132,6 +132,7 @@
 DATABASE_KEYS = [
     "allow_csv_upload",
     "allow_ctas",
+    "allow_cvas",
     "allow_dml",
     "allow_multi_schema_metadata_fetch",
     "allow_run_async",
@@ -2240,6 +2241,9 @@ def sql_json_exec(
             )
             limit = 0
         select_as_cta: bool = cast(bool, query_params.get("select_as_cta"))
+        ctas_method: CtasMethod = cast(
+            CtasMethod, query_params.get("ctas_method", CtasMethod.TABLE)
+        )
         tmp_table_name: str = cast(str, query_params.get("tmp_table_name"))
         client_id: str = cast(
             str, query_params.get("client_id") or utils.shortid()[:10]
@@ -2268,6 +2272,7 @@ def sql_json_exec(
             sql=sql,
             schema=schema,
             select_as_cta=select_as_cta,
+            ctas_method=ctas_method,
             start_time=now_as_float(),
             tab_name=tab_name,
             status=status,

superset/views/database/api.py

@@ -128,6 +128,7 @@ class DatabaseRestApi(DatabaseMixin, BaseSupersetModelRestApi):
         "database_name",
         "expose_in_sqllab",
         "allow_ctas",
+        "allow_cvas",
         "force_ctas_schema",
         "allow_run_async",
         "allow_dml",

superset/views/database/mixins.py

@@ -60,6 +60,7 @@ class DatabaseMixin:
         "allow_run_async",
         "allow_csv_upload",
         "allow_ctas",
+        "allow_cvas",
         "allow_dml",
         "force_ctas_schema",
         "impersonate_user",
@@ -111,6 +112,7 @@ class DatabaseMixin:
             "for more information."
         ),
         "allow_ctas": _("Allow CREATE TABLE AS option in SQL Lab"),
+        "allow_cvas": _("Allow CREATE VIEW AS option in SQL Lab"),
         "allow_dml": _(
             "Allow users to run non-SELECT statements "
             "(UPDATE, DELETE, CREATE, ...) "
@@ -182,6 +184,7 @@ class DatabaseMixin:
     label_columns = {
         "expose_in_sqllab": _("Expose in SQL Lab"),
         "allow_ctas": _("Allow CREATE TABLE AS"),
+        "allow_cvas": _("Allow CREATE VIEW AS"),
         "allow_dml": _("Allow DML"),
         "force_ctas_schema": _("CTAS Schema"),
         "database_name": _("Database"),

tests/base_tests.py

@@ -27,6 +27,7 @@
 from flask_testing import TestCase
 from sqlalchemy.orm import Session
 
+from superset.sql_parse import CtasMethod
 from tests.test_app import app  # isort:skip
 from superset import db, security_manager
 from superset.connectors.base.models import BaseDatasource
@@ -259,6 +260,7 @@ def run_sql(
         select_as_cta=False,
         tmp_table_name=None,
         schema=None,
+        ctas_method=CtasMethod.TABLE,
     ):
         if user_name:
             self.logout()
@@ -270,6 +272,7 @@ def run_sql(
             "client_id": client_id,
             "queryLimit": query_limit,
             "sql_editor_id": sql_editor_id,
+            "ctas_method": ctas_method,
         }
         if tmp_table_name:
             json_payload["tmp_table_name"] = tmp_table_name