48   if( p->flags & MEM_Null ){  in sqlite3VdbeCheckMemInvariants()
65       assert( (p->flags & ~(MEM_Null|MEM_Term|MEM_Subtype|MEM_FromBind  in sqlite3VdbeCheckMemInvariants()
309   pMem->flags &= (MEM_Null|MEM_Int|MEM_Real|MEM_IntReal);  in sqlite3VdbeMemClearAndResize()
462   assert( (pMem->flags & MEM_Null)!=0 || pFunc==pMem->u.pDef );  in sqlite3VdbeMemFinalize()
466   t.flags = MEM_Null;  in sqlite3VdbeMemFinalize()
492   assert( (pAccum->flags & MEM_Null)!=0 || pFunc==pAccum->u.pDef );  in sqlite3VdbeMemAggValue()
527   p->flags = MEM_Null;  in vdbeMemClearExternAndSetNull()
674   if( pMem->flags & MEM_Null ) return ifNull;  in sqlite3VdbeBooleanValue()
775   testcase( pMem->flags & MEM_Null );  in sqlite3VdbeMemNumerify()
776   if( (pMem->flags & (MEM_Int|MEM_Real|MEM_IntReal|MEM_Null))==0 ){  in sqlite3VdbeMemNumerify()
791   assert( (pMem->flags & (MEM_Int|MEM_Real|MEM_IntReal|MEM_Null))!=0 );  in sqlite3VdbeMemNumerify()
804   if( pMem->flags & MEM_Null ) return SQLITE_OK;  in sqlite3VdbeMemCast()
871     pMem->flags = MEM_Null;  in sqlite3VdbeMemSetNull()
945   assert( pMem->flags==MEM_Null );  in sqlite3VdbeMemSetPointer()
949   pMem->flags = MEM_Null|MEM_Dyn|MEM_Subtype|MEM_Term;  in sqlite3VdbeMemSetPointer()
1111   pFrom->flags = MEM_Null;  in sqlite3VdbeMemMove()
1254   pMem->flags = MEM_Null;  in sqlite3VdbeMemFromBtree()
1307   assert( (pVal->flags & (MEM_Null))==0 );  in valueToText()
1354   if( pVal->flags&MEM_Null ){  in sqlite3ValueText()
1366     p->flags = MEM_Null;  in sqlite3ValueNew()
1414             pRec->aMem[i].flags = MEM_Null;  in valueNew()
1967   assert( (p->flags & MEM_Null)==0 || (p->flags & (MEM_Str|MEM_Blob))==0 );  in sqlite3ValueBytes()
1981   if( p->flags & MEM_Null ) return 0;  in sqlite3ValueBytes()