trow: set other bit 0 in offset 0

include/common/trow.h

@@ -308,8 +308,8 @@ static FORCE_INLINE int32_t tdSetBitmapValTypeII(void *pBitmap, int16_t colIdx,
   // use literal value directly and not use formula to simplify the codes
   switch (nOffset) {
     case 0:
-      *pDestByte = ((*pDestByte) & 0x3F) | (valType << 6);
       // set the value and clear other partitions for offset 0
+      *pDestByte = (valType << 6);
       // *pDestByte |= (valType << 6);
       break;
     case 1:
@@ -417,8 +417,8 @@ static FORCE_INLINE int32_t tdSetBitmapValTypeI(void *pBitmap, int16_t colIdx, T
   // use literal value directly and not use formula to simplify the codes
   switch (nOffset) {
     case 0:
-      *pDestByte = ((*pDestByte) & 0x7F) | (valType << 7);
       // set the value and clear other partitions for offset 0
+      *pDestByte = (valType << 7);  
       // *pDestByte |= (valType << 7);
       break;
     case 1: