Add experimental branch disallowing VACUUM when there are one or more active SQL statements.experimental

FossilOrigin-Name: c1ebcacd9b31239aee065c64c4b4596d56dc397f

1 files changed, 4 insertions, 0 deletions

diff --git a/src/vacuum.c b/src/vacuum.c
index a0bf1ebfe..4babf5b40 100644
--- a/src/vacuum.c
+++ b/src/vacuum.c
@@ -110,6 +110,10 @@ int sqlite3RunVacuum(char **pzErrMsg, sqlite3 *db){
     sqlite3SetString(pzErrMsg, db, "cannot VACUUM from within a transaction");
     return SQLITE_ERROR;
   }
+  if( db->activeVdbeCnt>1 ){
+    sqlite3SetString(pzErrMsg, db,"cannot VACUUM - SQL statements in progress");
+    return SQLITE_ERROR;
+  }
 
   /* Save the current value of the database flags so that it can be 
   ** restored before returning. Then set the writable-schema flag, and