Las estadísticas no se actualizan automáticamente hasta que se necesitan de nuevo. también conocido como TRUNCATE no lo hace. Así que "No".
La respuesta original fue "Sí" porque no es automático como parte de TRUNCATE. Depende de cómo leas la pregunta :-)
Recuerde, las estadísticas se actualizan automáticamente cuando lo necesita una consulta (por ejemplo, número de cambio de fila). De "Estadísticas de índice " en BOL
Una forma de verificar usando STATS_DATE ...
SELECT
name AS index_name,
STATS_DATE(object_id, index_id)
FROM
sys.indexes
WHERE
object_id = OBJECT_ID('MyTruncatedTable')
Editar :Quería asegurarme :-)
Verá que las estadísticas solo se actualizan con las declaraciones SELECT, no con INSERT, DELETE o TRUNCATE
IF OBJECT_ID('dbo.foo') IS NOT NULL DROP TABLE dbo.foo
CREATE TABLE dbo.foo (
bar int NOT NULL IDENTITY (1, 1) PRIMARY KEY,
thing int NOT NULL
)
CREATE INDEX IX_thing ON dbo.foo (thing)
INSERT dbo.foo (thing) SELECT c1.object_id FROM sys.columns c1, sys.columns c2
SELECT
name AS index_name,
STATS_DATE(object_id, index_id) AS AfterLoad
FROM sys.indexes WHERE object_id = OBJECT_ID('dbo.foo')
SELECT DISTINCT thing FROM dbo.foo ORDER BY thing DESC
SELECT
name AS index_name,
STATS_DATE(object_id, index_id) AS AfterFirstQuery
FROM sys.indexes WHERE object_id = OBJECT_ID('dbo.foo')
DELETE TOP (50000) dbo.foo
SELECT
name AS index_name,
STATS_DATE(object_id, index_id) AS AfterDelete
FROM sys.indexes WHERE object_id = OBJECT_ID('dbo.foo')
SELECT DISTINCT thing FROM dbo.foo ORDER BY thing DESC
SELECT
name AS index_name,
STATS_DATE(object_id, index_id) AS After2ndQuery
FROM sys.indexes WHERE object_id = OBJECT_ID('dbo.foo')
TRUNCATE TABLE dbo.foo
SELECT
name AS index_name,
STATS_DATE(object_id, index_id) AS AfterTruncate
FROM sys.indexes WHERE object_id = OBJECT_ID('dbo.foo')
SELECT DISTINCT thing FROM dbo.foo ORDER BY thing DESC
SELECT
name AS index_name,
STATS_DATE(object_id, index_id) AS After3rdQuery
FROM sys.indexes WHERE object_id = OBJECT_ID('dbo.foo')
