Generate script of all indexes, keys in the SQL Server database - sql

Question

I am looking to generate scripts like:
ALTER TABLE dbo.Person
ADD CONSTRAINT PK_Person PRIMARY KEY CLUSTERED (PersonID);
CREATE INDEX IX_EVT_EVENTS on EVT_EVENTS(prg_event_t1, prg_event_t2, num_order)
The main problem I cannot find all information that I need, for example this query:
SELECT t.name TableName, I.*
FROM sys.indexes I
Inner Join sys.tables T on i.object_id=t.object_id
returns information about all keys and indexes, but.. there is no "Columns' Name" where can I get them?
I tried sys.all_columns and sys.key_constraints also.

Answer 1

Column names are stored in the sys.columns andsys.index_columns tables.
This will select the column names from all tables:
SELECT sc.name
FROM sys.tables st
INNER JOIN sys.columns sc ON sc.OBJECT_ID = st.OBJECT_ID
WHERE st.OBJECT_ID = 'ObjectID'
Or to join with the sys.indexes table, this will select the table name and the columns:
SELECT st.name ,
sc.name
FROM sys.indexes si
INNER JOIN sys.tables st ON si.object_id = st.object_id
INNER JOIN sys.columns sc ON sc.OBJECT_ID = st.OBJECT_ID
You can add a WHERE clause into the statement to filter on your index column
SELECT si.name ,
st.name ,
sc.name
FROM sys.indexes si
INNER JOIN sys.tables st ON si.object_id = st.object_id
INNER JOIN sys.columns sc ON sc.OBJECT_ID = st.OBJECT_ID
WHERE si.name = 'IX_EVT_EVENTS'

Answer 2

I have tried many scripts in web. All of them had flaws. I finally wrote my script using a post in msdn site and changed it to work on many kind of situations.
Note: This scripts works on SQL Server 2012 and later
WITH IndexInfo AS (
SELECT ix.object_id
, ix.NAME AS IndexName
, ix.type_desc
, ix.filter_definition
, ix.is_unique
, ix.is_primary_key
, ix.allow_row_locks
, ix.allow_page_locks
, ds.NAME AS DataSpaceName
, ds.type AS DataSpaceType
, ix.is_padded
, object_schema_name(ix.object_id) AS SchemaName
, object_name(ix.object_id) AS TableName
, IIF(ix.type <= 2, is_included_column, 0) AS HasIncludedColumn
, IIF(ix.type in (5, 6), 1, 0) AS IsColumnStore
, (
SELECT KeyColumns
FROM (
SELECT IC2.object_id
, IC2.index_id
, STUFF((
SELECT ' , ' + C.NAME + IIF(MAX(CONVERT(INT, IC1.is_descending_key)) = 1 AND ix.type <= 2, ' DESC ', ' ')
FROM sys.index_columns IC1
JOIN sys.columns C ON C.object_id = IC1.object_id
AND C.column_id = IC1.column_id
--AND IC1.is_included_column = 0
AND IIF(ix.type <= 2, IC1.is_included_column, 0) = 0
AND IIF(ix.type <= 2, IC1.key_ordinal, ic.index_column_id) > 0
WHERE IC1.object_id = IC2.object_id
AND IC1.index_id = IC2.index_id
GROUP BY IC1.object_id
, C.NAME
, index_id
, IC1.key_ordinal
, IC1.index_column_id
ORDER BY IIF(ix.type <= 2, IC1.key_ordinal, IC1.index_column_id)
FOR XML PATH('')
), 1, 2, '') KeyColumns
FROM sys.index_columns IC2
GROUP BY IC2.object_id
, IC2.index_id
) tmp
WHERE tmp.object_id = ix.object_id
AND tmp.index_id = ix.index_id
) AS KeyColumnsStr
, (
SELECT IncludedColumns
FROM (
SELECT IC2.object_id, IC2.index_id
, STUFF((
SELECT ' , ' + C.NAME
FROM sys.index_columns IC1
JOIN sys.columns C ON C.object_id = IC1.object_id
AND C.column_id = IC1.column_id
--AND IC1.is_included_column = 1
AND IIF(ix.type <= 2, IC1.is_included_column, 0) <> 0
WHERE IC1.object_id = IC2.object_id
AND IC1.index_id = IC2.index_id
--and IIF(ix.type <= 2, IC1.key_ordinal, ic.index_column_id) > 0
GROUP BY IC1.object_id, C.NAME, index_id, IC1.key_ordinal, IC1.index_column_id
ORDER BY IIF(ix.type <= 2, IC1.key_ordinal, IC1.index_column_id)
FOR XML PATH('')
), 1, 2, '') IncludedColumns
FROM sys.index_columns IC2
GROUP BY IC2.object_id, IC2.index_id
) tmp
WHERE tmp.object_id = ix.object_id
AND tmp.index_id = ix.index_id
AND IncludedColumns IS NOT NULL
) AS IncludedColumnsStr
FROM sys.indexes ix
INNER JOIN sys.index_columns ic ON ic.index_id = ix.index_id AND ic.object_id = ix.object_id
INNER JOIN sys.columns col ON col.column_id = ic.column_id AND col.object_id = ix.object_id
INNER JOIN sys.data_spaces ds ON ix.data_space_id = ds.data_space_id
WHERE ix.NAME IS NOT NULL AND IIF(ix.type <= 2, ic.key_ordinal, ic.index_column_id) > 0
)
, Scrpt AS (
SELECT *
, 'CREATE '
+ CASE WHEN is_unique = 1 THEN ' UNIQUE ' ELSE '' END
+ type_desc COLLATE DATABASE_DEFAULT + ' INDEX ' + IndexName + ' ON '
+ SchemaName + '.' + TableName + '(' + KeyColumnsStr + ')'
+ ISNULL(IIF(HasIncludedColumn > 0, ' ', ' INCLUDE (' + IncludedColumnsStr + ')'), '')
+ IIF(filter_definition IS NULL, ' ', ' WHERE ' + filter_definition)
+ ' WITH ('
+ CASE WHEN IsColumnStore = 1 THEN ' DROP_EXISTING = OFF '
ELSE
IIF(is_padded = 1, ' PAD_INDEX = ON ', ' PAD_INDEX = OFF ') + ','
+ ' DROP_EXISTING = OFF ' + ','
+ ' ONLINE = OFF ' + ','
+ IIF(allow_row_locks = 1, ' ALLOW_ROW_LOCKS = ON ', ' ALLOW_ROW_LOCKS = OFF ') + ','
+ IIF(allow_page_locks = 1, ' ALLOW_PAGE_LOCKS = ON ', ' ALLOW_PAGE_LOCKS = OFF ')
END
+ ' ) '
+ IIF(DataSpaceType = 'FG','ON [' + DataSpaceName + ']', '') AS CreateIndexScript
FROM IndexInfo
)
SELECT DISTINCT IndexName, CreateIndexScript
FROM Scrpt
WHERE object_id = object_id('dbo.SWPartition')
As a credit to original author, I mentions the original link here
How to Generate Index Creation Scripts