Reference count the KeyInfo object. Cache a copy of an appropriate KeyInfo

for each index in the Index object, and reuse that one copy as much as possible.

FossilOrigin-Name: defd5205a7cc3543cdd18f906f568e943b8b3a2c

1 files changed, 1 insertions, 2 deletions

diff --git a/src/pragma.c b/src/pragma.c
index 948d96056..9211a2cb0 100644
--- a/src/pragma.c
+++ b/src/pragma.c
@@ -1680,9 +1680,8 @@ void sqlite3Pragma(
           if( pIdx==0 ){
             sqlite3OpenTable(pParse, i, iDb, pParent, OP_OpenRead);
           }else{
-            KeyInfo *pKey = sqlite3IndexKeyinfo(pParse, pIdx);
             sqlite3VdbeAddOp3(v, OP_OpenRead, i, pIdx->tnum, iDb);
-            sqlite3VdbeChangeP4(v, -1, (char*)pKey, P4_KEYINFO_HANDOFF);
+            sqlite3VdbeSetP4KeyInfo(pParse, pIdx);
           }
         }else{
           k = 0;