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Finding a Value in an entire SQL Server

Note that this script may take a long time and may impact server performance. Execute with caution and only if you truely understand what the script is doing.

Files

Published Version

-> Includes generic Table placeholders for results and history -> Tables are defined as

CREATE TABLE [stat].[scan_TablesScanned](
	[id] [int] IDENTITY(1,1) NOT NULL,
	[searchTerm] [nvarchar](max) NULL,
	[dbName] [nvarchar](max) NULL,
	[schemaTable] [nvarchar](max) NULL,
	[execDate] [datetime] NULL,
	[searchDescription] [nvarchar](max) NULL
) 

CREATE TABLE [stat].[scan_results](
	[id] [int] IDENTITY(1,1) NOT NULL,
	[searchTerm] [nvarchar](max) NULL,
	[dbName] [nvarchar](max) NULL,
	[schemaTable] [nvarchar](max) NULL,
	[columnName] [nvarchar](max) NULL,
	[nbrOfHits] [nvarchar](max) NULL,
	[execDate] [datetime] NULL
)

PseudoCode

Set search term While there are tables in the system master database select minimum database that is greater than the last table name processed

While there are tables in that Database select minimum table that is greater than the last table name processed from Information_schema

While there are columns in that table select minimum column that is greater than the last table name processed from Information_schema

Check if the column matches the search criteria If success, log the database, table and field to table

Print out table

Specifics

  • not data type specific, which increases runtime, but avoids missing values. If you know exactly the data type of potential match columns, enable data type filters
  • uses sp_executesql to utilize parameters in search criteria

Measured Performance

Run-1

  • Database Size: 19.75 GB (w/o Logs)
  • Runtime: 16.8 minutes

Run-2

  • Database Size: 2.87 GB (w/o Logs)
  • Runtime: 2.3 minutes

Linear search time: ~ 1.3 minutes per GB Database size estimated using the query:

select
  sdb.name
  , smf.size * 8.0 / (1024*1024) as sizeInMB -- multiplication by 8 necessary as sql value represents nbr of 8KB pages
from sys.databases sdb
left join sys.master_files smf
	on smf.database_id = sdb.database_id