Initial commit of fk_index_generator script

Author: ericcobb

fk_index_generator.sql

@@ -0,0 +1,53 @@
+/**************************************************************************
+	FK Index Generator
+	Author: Eric Cobb - http://www.sqlnuggets.com/
+	Source: https://github.com/ericcobb/FK-Index-Generator
+	Supported Versions: SQL Server 2008, SQL Server 2012, SQL Server 2014, SQL Server 2016, SQL Server 2017
+	License:
+			MIT License
+			
+			Copyright (c) 2017 Eric Cobb
+
+			Permission is hereby granted, free of charge, to any person obtaining a copy
+			of this software and associated documentation files (the "Software"), to deal
+			in the Software without restriction, including without limitation the rights
+			to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+			copies of the Software, and to permit persons to whom the Software is
+			furnished to do so, subject to the following conditions:
+
+			The above copyright notice and this permission notice shall be included in all
+			copies or substantial portions of the Software.
+
+			THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+			IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+			FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+			AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+			LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+			OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+			SOFTWARE.
+***************************************************************************/
+
+SELECT [ParentSchema], [ParentTable], [ParentColumn],
+		[Script] = 'CREATE NONCLUSTERED INDEX [IX_FK_'+[ParentTable]+'_'+[ParentColumn]+'] ON ['+[ParentSchema]+'].['+[ParentTable]+'] (['+[ParentColumn]+']);'
+--Gets a list of all FK Constraints
+FROM (SELECT [ParentObjectID] = fk.parent_object_id
+			,[ParentSchema] = SCHEMA_NAME (fk.[schema_id])
+			,[ParentTable] = t.[name]
+			,[parent_column_id] = fkc.parent_column_id
+			,[ParentColumn] = COL_NAME(fk.parent_object_id , fkc.parent_column_id)
+		FROM sys.foreign_keys fk
+		INNER JOIN sys.foreign_key_columns fkc ON fkc.constraint_object_id = fk.[object_id]
+		INNER JOIN sys.tables t ON t.object_id = fk.parent_object_id)  c
+--Gets a list of the first key column of all nonclustered indexes
+LEFT JOIN (SELECT [TableObjectID] = t.[object_id]
+					,[IndexName] = i.[name]
+					,[TableColumnID] = ic.column_id
+			FROM sys.indexes i
+			INNER JOIN sys.index_columns ic ON ic.object_id = i.object_id and ic.index_id = i.index_id
+			INNER JOIN sys.tables t ON t.object_id = i.object_id 
+			INNER JOIN sys.columns col ON ic.object_id = col.object_id and ic.column_id = col.column_id 
+			WHERE i.[type] IN (1,2)
+			AND OBJECTPROPERTY(i.OBJECT_ID,'IsUserTable') = 1
+			AND ic.key_ordinal = 1) i ON i.[TableObjectID] = c.[ParentObjectID] AND i.[TableColumnID] = c.parent_column_id
+WHERE i.[IndexName] IS NULL  --If NULL, an index beginning with the specified key column does not exist.
+ORDER BY [ParentSchema], [ParentTable], [ParentColumn];