Skip unique constraint enforcement if compiled with SQLITE_OMIT_UNIQUE_ENFORCEMENT.

FossilOrigin-Name: ba85bf8cb88f7ae220d919f5c23f51d9dcedc843

src/insert.c

@@ -1310,8 +1310,9 @@ void sqlite3GenerateConstraintChecks(
   */
   for(iCur=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, iCur++){
     int regIdx;
+#ifndef SQLITE_OMIT_UNIQUE_ENFORCEMENT
     int regR;
-
+#endif
     if( aRegIdx[iCur]==0 ) continue;  /* Skip unused indices */
 
     /* Create a key for accessing the index entry */
@@ -1329,6 +1330,12 @@ void sqlite3GenerateConstraintChecks(
     sqlite3VdbeChangeP4(v, -1, sqlite3IndexAffinityStr(v, pIdx), 0);
     sqlite3ExprCacheAffinityChange(pParse, regIdx, pIdx->nColumn+1);
 
+#ifdef SQLITE_OMIT_UNIQUE_ENFORCEMENT
+    pIdx->onError = OE_None;
+    sqlite3ReleaseTempRange(pParse, regIdx, pIdx->nColumn+1);
+    continue;  /* Treat pIdx as if it is not a UNIQUE index */
+#else
+
     /* Find out what action to take in case there is an indexing conflict */
     onError = pIdx->onError;
     if( onError==OE_None ){ 
@@ -1402,6 +1409,7 @@ void sqlite3GenerateConstraintChecks(
     }
     sqlite3VdbeJumpHere(v, j3);
     sqlite3ReleaseTempReg(pParse, regR);
+#endif
   }
   
   if( pbMayReplace ){