Reenable quoting for SqlServerDialect.

Quoting is important since it allows use of keywords as names.
We do not change the letter casing.
In a default setup the database does not care since it is case-insensitive.
If configured to be case-sensitive it makes sense to pass on what ever letter casing there is, since you seem to care.

Closes #1216
See #914

Author: schauder

spring-data-jdbc/src/test/java/org/springframework/data/jdbc/core/convert/SqlGeneratorUnitTests.java

@@ -262,7 +262,7 @@ void findAllSortedWithNullHandling_ignoresNullHandlingWhenDialectDoesNotSupportI
 
 		String sql = sqlGenerator.getFindAll(Sort.by(new Sort.Order(Sort.Direction.ASC, "name", Sort.NullHandling.NULLS_LAST)));
 
-		assertThat(sql).endsWith("ORDER BY dummy_entity.x_name ASC");
+		assertThat(sql).endsWith("ORDER BY \"dummy_entity\".\"x_name\" ASC");
 	}
 
 	@Test // DATAJDBC-101

spring-data-relational/src/main/java/org/springframework/data/relational/core/dialect/SqlServerDialect.java

@@ -44,6 +44,9 @@ public boolean supportedForBatchOperations() {
 		}
 	};
 
+	private static final IdentifierProcessing IDENTIFIER_PROCESSING = IdentifierProcessing
+			.create(IdentifierProcessing.Quoting.ANSI, IdentifierProcessing.LetterCasing.AS_IS);
+
 	protected SqlServerDialect() {}
 
 	@Override
@@ -162,7 +165,7 @@ public SelectRenderContext getSelectContext() {
 
 	@Override
 	public IdentifierProcessing getIdentifierProcessing() {
-		return IdentifierProcessing.NONE;
+		return IDENTIFIER_PROCESSING;
 	}
 
 	@Override