1 files changed, 29 insertions, 2 deletions
diff --git a/subversion/libsvn_fs_fs/rep-cache-db.sql b/subversion/libsvn_fs_fs/rep-cache-db.sql
index caaac334c68b0..cd89f35c63ee3 100644
--- a/subversion/libsvn_fs_fs/rep-cache-db.sql
+++ b/subversion/libsvn_fs_fs/rep-cache-db.sql
@@ -21,7 +21,7 @@
  * ====================================================================
  */
 
--- STMT_CREATE_SCHEMA
+-- STMT_CREATE_SCHEMA_V1
 /* A table mapping representation hashes to locations in a rev file. */
 CREATE TABLE rep_cache (
   hash TEXT NOT NULL PRIMARY KEY,
@@ -33,36 +33,63 @@ CREATE TABLE rep_cache (
 
 PRAGMA USER_VERSION = 1;
 
+-- STMT_CREATE_SCHEMA_V2
+/* A table mapping representation hashes to locations in a rev file.
+   Same as in V1 schema, except that it uses the `WITHOUT ROWID` optimization:
+   https://sqlite.org/withoutrowid.html
+
+   Note that this optimization is only supported starting from SQLite version
+   3.8.2 (2013-12-06).  To keep compatibility with existing binaries, it is
+   only used for newer filesystem formats that were released together with
+   bumping the minimum required SQLite version.
+ */
+CREATE TABLE rep_cache (
+  hash TEXT NOT NULL PRIMARY KEY,
+  revision INTEGER NOT NULL,
+  offset INTEGER NOT NULL,
+  size INTEGER NOT NULL,
+  expanded_size INTEGER NOT NULL
+  ) WITHOUT ROWID;
+
+PRAGMA USER_VERSION = 2;
 
 -- STMT_GET_REP
+/* Works for both V1 and V2 schemas. */
 SELECT revision, offset, size, expanded_size
 FROM rep_cache
 WHERE hash = ?1
 
 -- STMT_SET_REP
+/* Works for both V1 and V2 schemas. */
 INSERT OR FAIL INTO rep_cache (hash, revision, offset, size, expanded_size)
 VALUES (?1, ?2, ?3, ?4, ?5)
 
 -- STMT_GET_REPS_FOR_RANGE
+/* Works for both V1 and V2 schemas. */
 SELECT hash, revision, offset, size, expanded_size
 FROM rep_cache
 WHERE revision >= ?1 AND revision <= ?2
 
 -- STMT_GET_MAX_REV
+/* Works for both V1 and V2 schemas. */
 SELECT MAX(revision)
 FROM rep_cache
 
 -- STMT_DEL_REPS_YOUNGER_THAN_REV
+/* Works for both V1 and V2 schemas. */
 DELETE FROM rep_cache
 WHERE revision > ?1
 
 /* An INSERT takes an SQLite reserved lock that prevents other writes
    but doesn't block reads.  The incomplete transaction means that no
    permanent change is made to the database and the transaction is
-   removed when the database is closed.  */
+   removed when the database is closed.
+
+   Works for both V1 and V2 schemas.  */
 -- STMT_LOCK_REP
 BEGIN TRANSACTION;
 INSERT INTO rep_cache VALUES ('dummy', 0, 0, 0, 0)
 
 -- STMT_UNLOCK_REP
+/* Works for both V1 and V2 schemas. */
 ROLLBACK TRANSACTION;