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diff --git a/sqlite3.c b/sqlite3.c
index 8fd740b..c67f4fe 100644
--- a/sqlite3.c
+++ b/sqlite3.c
@@ -101055,7 +101055,12 @@ expr_code_doover:
** constant.
*/
int iReg = sqlite3ExprCodeTarget(pParse, pExpr->pLeft,target);
- int aff = sqlite3TableColumnAffinity(pExpr->y.pTab, pExpr->iColumn);
+ int aff;
+ if( pExpr->y.pTab ){
+ aff = sqlite3TableColumnAffinity(pExpr->y.pTab, pExpr->iColumn);
+ }else{
+ aff = pExpr->affExpr;
+ }
if( aff>SQLITE_AFF_BLOB ){
static const char zAff[] = "B\000C\000D\000E";
assert( SQLITE_AFF_BLOB=='A' );
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