fix: Missing sql_editor_id index

UPDATING.md

@@ -48,6 +48,10 @@ assists people when migrating to a new version.
   listing all databases in CRUD-view and dropdown and didn't provide access to data as it
   seemed the name would imply.
 
+### Potential Downtime
+
+- [27392](https://github.com/apache/superset/pull/27392): Adds an index to `query.sql_editor_id` to improve performance. This may cause downtime on large deployments.
+
 ## 4.0.0
 
 - [27119](https://github.com/apache/superset/pull/27119): Updates various database columns to use the `MediumText` type, potentially requiring a table lock on MySQL dbs or taking some time to complete on large deployments.

superset/migrations/shared/utils.py

@@ -51,6 +51,23 @@ def table_has_column(table: str, column: str) -> bool:
         return False
 
 
+def table_has_index(table: str, index: str) -> bool:
+    """
+    Checks if an index exists in a given table.
+
+    :param table: A table name
+    :param index: A index name
+    :returns: True if the index exists in the table
+    """
+
+    insp = inspect(op.get_context().bind)
+
+    try:
+        return any(ind["name"] == index for ind in insp.get_indexes(table))
+    except NoSuchTableError:
+        return False
+
+
 uuid_by_dialect = {
     MySQLDialect: "UNHEX(REPLACE(CONVERT(UUID() using utf8mb4), '-', ''))",
     PGDialect: "uuid_in(md5(random()::text || clock_timestamp()::text)::cstring)",

superset/migrations/versions/2024-05-02_13-40_3dfd0e78650e_add_query_sql_editor_id_index.py

@@ -0,0 +1,49 @@
+# 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_query_sql_editor_id_index
+
+Revision ID: 3dfd0e78650e
+Revises: 5f57af97bc3f
+Create Date: 2024-05-02 13:40:23.126659
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = "3dfd0e78650e"
+down_revision = "5f57af97bc3f"
+
+from alembic import op  # noqa: E402
+
+from superset.migrations.shared.utils import table_has_index  # noqa: E402
+
+table = "query"
+index = "ix_sql_editor_id"
+
+
+def upgrade():
+    if not table_has_index(table, index):
+        op.create_index(
+            op.f(index),
+            table,
+            ["sql_editor_id"],
+            unique=False,
+        )
+
+
+def downgrade():
+    if table_has_index(table, index):
+        op.drop_index(op.f(index), table_name=table)

superset/models/sql_lab.py

@@ -107,7 +107,7 @@ class Query(
     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))
+    sql_editor_id = Column(String(256), index=True)
     schema = Column(String(256))
     catalog = Column(String(256), nullable=True, default=None)
     sql = Column(MediumText())