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Merge pull request #652 from erikdarlingdata/dev
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‎Alerts/Alerts.sql‎

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This script will set up alerts for high severity and corruption errors in SQL Server.
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Copyright 2025 Darling Data, LLC
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Copyright 2026 Darling Data, LLC
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https://www.erikdarling.com/
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For support, head over to GitHub:

‎CLAUDE.md‎

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This document outlines the T-SQL coding style preferences for Erik Darling (Darling Data, LLC) and must be strictly followed when writing or modifying SQL code.
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## Project Constraints
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- **No Additional Dependencies**: Do not create helper functions, procedures, views, or any other database objects as dependencies for stored procedures. All logic must be self-contained within the procedure itself to avoid deployment and dependency management complexity.
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## General Formatting
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- **Keywords**: All SQL keywords in UPPERCASE (SELECT, FROM, WHERE, JOIN, etc.)
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- **Functions**: All SQL functions in UPPERCASE (CONVERT, ISNULL, OBJECT_ID, etc.)
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- **Data types**:
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- **Data types**:
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- Never abbreviate data types (use INTEGER instead of INT)
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- All data types must be lowercase (varchar, nvarchar, datetime2, bigint, etc.)
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- Length specifications must also be lowercase: nvarchar(max), not nvarchar(MAX)
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- Precision and scale specifications must be lowercase: decimal(38,2), not DECIMAL(38,2)
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- Always use sysname for SQL Server object names (database names, table names, schema names, column names, index names, etc.) rather than nvarchar(128)
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- **Keywords**: Never abbreviate keywords (use EXECUTE instead of EXEC, TRANSACTION instead of TRAN, PROCEDURE instead of PROC)
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- **Indentation**: 4 spaces for each level of indentation (NEVER use tabs)
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- **Line breaks**: Each statement on a new line

‎Clear Token Perm/ClearTokenPerm Agent Job.sql‎

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@@ -16,7 +16,7 @@ For background on why you might need this:
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In short, if your security caches are growing out of control, it can cause all sorts of weird issues with SQL Server.
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Copyright 2025 Darling Data, LLC
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Copyright 2026 Darling Data, LLC
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https://www.erikdarling.com/
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For support, head over to GitHub:
@@ -73,7 +73,7 @@ EXECUTE @ReturnCode = msdb.dbo.sp_add_job
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@description = N'For background on why you need this:
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https://www.erikdarling.com/troubleshooting-security-cache-issues-userstore_tokenperm-and-tokenandpermuserstore/
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Copyright 2025 Darling Data, LLC
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Copyright 2026 Darling Data, LLC
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https://www.erikdarling.com/
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For support, head over to GitHub:

‎Clear Token Perm/ClearTokenPerm.sql‎

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@@ -16,7 +16,7 @@ For background on why you might need this:
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In short, if your security caches are growing out of control, it can cause all sorts of weird issues with SQL Server.
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Copyright 2025 Darling Data, LLC
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Copyright 2026 Darling Data, LLC
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https://www.erikdarling.com/
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For support, head over to GitHub:

‎Clear Token Perm/Inflate Security Cache Demo And Analysis Script.sql‎

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MIT License
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Copyright 2025 Darling Data, LLC
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Copyright 2026 Darling Data, LLC
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https://www.erikdarling.com/
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‎Clear Token Perm/README.md‎

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The DBCC FREESYSTEMCACHE command used in these scripts will clear the security cache, which may cause a temporary performance impact as the cache is rebuilt. Test thoroughly in non-production environments before deploying to production.
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Copyright 2025 Darling Data, LLC
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Copyright 2026 Darling Data, LLC
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Released under MIT license

‎Create Long IN List/Longingly.sql‎

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This procedure exists only to show how long IN clauses can hurt query performance.
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Copyright 2025 Darling Data, LLC
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Copyright 2026 Darling Data, LLC
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https://www.erikdarling.com/
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For support, head over to GitHub:

‎Helper Views/README.md‎

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Some of these scripts (particularly WhatsUpMemory) may cause performance issues if run on busy production servers. Use with caution, especially on servers with large amounts of memory.
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Copyright 2025 Darling Data, LLC
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Copyright 2026 Darling Data, LLC
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Released under MIT license

‎Helper Views/WhatsUpIndexes.sql‎

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schema_name = s.name,
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table_name = OBJECT_NAME(ps.object_id),
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index_name = i.name,
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data_compression_desc = p.data_compression_desc,
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in_row_pages_mb =
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CONVERT
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(
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JOIN sys.indexes AS i
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ON ps.object_id = i.object_id
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AND ps.index_id = i.index_id
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JOIN sys.partitions AS p
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ON ps.object_id = p.object_id
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AND ps.index_id = p.index_id
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AND ps.partition_number = p.partition_number
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ORDER BY
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ps.object_id,
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ps.index_id,

‎Helper Views/WhatsUpLocks.sql‎

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ALTER FUNCTION
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dbo.WhatsUpLocks
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(
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@spid integer
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@spid integer,
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@outsider bit = 'false'
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)
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RETURNS table
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RETURNS
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table
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AS
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RETURN
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SELECT TOP (9223372036854775807)
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dtl.request_session_id,
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blocked_by =
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ISNULL
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(
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(
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SELECT
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der.blocking_session_id
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FROM sys.dm_exec_requests AS der
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WHERE dtl.request_session_id = der.session_id
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),
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0
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),
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dtl.request_mode,
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l.locked_object,
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index_name = ISNULL(i.name, N'OBJECT'),
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dtl.resource_type,
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dtl.request_status,
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dtl.request_owner_type,
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hobt_lock_count =
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SUM
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(
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IIF
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(
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dtl.resource_associated_entity_id = p.hobt_id,
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1,
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0
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)
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),
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object_locks =
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SUM
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(
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IIF
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(
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dtl.resource_type = N'OBJECT',
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1,
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0
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)
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),
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page_locks =
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SUM
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(
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IIF
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(
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dtl.resource_type = N'PAGE',
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1,
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0
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)
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),
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row_locks =
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SUM
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(
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IIF
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(
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dtl.resource_type IN (N'RID', N'KEY'),
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1,
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0
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)
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),
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total_locks = COUNT_BIG(*)
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FROM sys.dm_tran_locks AS dtl WITH(NOLOCK)
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LEFT JOIN sys.partitions AS p WITH(NOLOCK)
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ON dtl.resource_associated_entity_id = p.hobt_id
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OUTER APPLY
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(
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SELECT
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locked_object = ao.name
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FROM sys.all_objects AS ao WITH(NOLOCK)
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WHERE dtl.resource_type = N'OBJECT'
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AND dtl.resource_associated_entity_id = ao.object_id
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dtl.request_session_id,
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blocked_by =
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ISNULL
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(
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(
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SELECT
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der.blocking_session_id
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FROM sys.dm_exec_requests AS der
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WITH(NOLOCK)
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WHERE dtl.request_session_id = der.session_id
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),
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0
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),
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dtl.request_mode,
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l.locked_object,
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index_name = ISNULL(i.name, N'OBJECT'),
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dtl.resource_type,
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dtl.request_status,
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dtl.request_owner_type,
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hobt_lock_count =
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SUM
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(
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CASE
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WHEN p.hobt_id IS NOT NULL
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THEN dtl.lock_count
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ELSE 0
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END
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),
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object_locks =
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SUM
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(
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CASE
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WHEN dtl.resource_type = N'OBJECT'
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THEN dtl.lock_count
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ELSE 0
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END
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),
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page_locks =
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SUM
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(
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CASE
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WHEN dtl.resource_type = N'PAGE'
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THEN dtl.lock_count
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ELSE 0
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END
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),
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row_locks =
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SUM
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(
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CASE
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WHEN dtl.resource_type IN (N'RID', N'KEY')
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THEN dtl.lock_count
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ELSE 0
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END
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),
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total_locks = SUM(dtl.lock_count)
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FROM
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(
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SELECT
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dtl.request_session_id,
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dtl.request_mode,
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dtl.resource_type,
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dtl.request_status,
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dtl.request_owner_type,
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dtl.resource_associated_entity_id,
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lock_count = COUNT_BIG(*)
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FROM sys.dm_tran_locks AS dtl
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WITH(NOLOCK)
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WHERE (dtl.request_session_id = @spid OR @spid IS NULL)
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AND (dtl.request_request_id = CURRENT_REQUEST_ID() OR @spid IS NULL OR @outsider = 'true')
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AND (dtl.request_owner_id = CURRENT_TRANSACTION_ID() OR @spid IS NULL OR @outsider = 'true')
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AND dtl.resource_type <> N'DATABASE'
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GROUP BY
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dtl.request_session_id,
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dtl.request_mode,
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dtl.resource_type,
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dtl.request_status,
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dtl.request_owner_type,
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dtl.resource_associated_entity_id
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) AS dtl
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LEFT JOIN sys.partitions AS p
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WITH(NOLOCK)
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ON dtl.resource_associated_entity_id = p.hobt_id
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OUTER APPLY
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(
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SELECT TOP (1)
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locked_object = ao.name
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FROM sys.all_objects AS ao
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WITH(NOLOCK)
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WHERE dtl.resource_type = N'OBJECT'
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AND dtl.resource_associated_entity_id = ao.object_id
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UNION ALL
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UNION ALL
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SELECT
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locked_object = ao.name
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FROM sys.all_objects AS ao WITH(NOLOCK)
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WHERE dtl.resource_type <> N'OBJECT'
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AND p.object_id = ao.object_id
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) AS l
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OUTER APPLY
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(
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SELECT TOP (1)
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i.name
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FROM sys.indexes AS i WITH(NOLOCK)
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WHERE i.object_id = p.object_id
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AND i.index_id = p.index_id
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) AS i
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WHERE (dtl.request_session_id = @spid OR @spid IS NULL)
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AND (dtl.request_request_id = CURRENT_REQUEST_ID() OR @spid IS NULL)
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AND (dtl.request_owner_id = CURRENT_TRANSACTION_ID() OR @spid IS NULL)
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AND dtl.resource_type <> N'DATABASE'
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AND l.locked_object <> N'WhatsUpLocks'
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GROUP BY
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dtl.request_session_id,
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dtl.resource_type,
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dtl.request_mode,
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dtl.request_status,
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dtl.request_owner_type,
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l.locked_object,
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i.name
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ORDER BY
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dtl.request_session_id,
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l.locked_object,
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index_name,
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total_locks DESC;
160-
GO
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SELECT TOP (1)
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locked_object = ao.name
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FROM sys.all_objects AS ao
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WITH(NOLOCK)
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WHERE dtl.resource_type <> N'OBJECT'
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AND p.object_id = ao.object_id
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) AS l
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OUTER APPLY
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(
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SELECT TOP (1)
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i.name
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FROM sys.indexes AS i
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WITH(NOLOCK)
165+
WHERE i.object_id = p.object_id
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AND i.index_id = p.index_id
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) AS i
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WHERE l.locked_object <> N'WhatsUpLocks'
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GROUP BY
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dtl.request_session_id,
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dtl.resource_type,
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dtl.request_mode,
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dtl.request_status,
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dtl.request_owner_type,
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l.locked_object,
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i.name
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ORDER BY
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dtl.request_session_id,
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l.locked_object,
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index_name,
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total_locks DESC;

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