fix bug

src/query/inc/qFilter.h

@@ -30,6 +30,8 @@ extern "C" {
 #define FILTER_DEFAULT_VALUE_SIZE 4
 #define FILTER_DEFAULT_GROUP_UNIT_SIZE 2
 
+#define MAX_NUM_STR_SIZE 40
+
 enum {
   FLD_TYPE_COLUMN = 1,
   FLD_TYPE_VALUE = 2,  

src/query/src/qFilter.c

@@ -1375,9 +1375,11 @@ int32_t filterInitValFieldData(SFilterInfo *info) {
     }
 
     if (type == TSDB_DATA_TYPE_BINARY) {
-      fi->data = calloc(1, var->nLen + VARSTR_HEADER_SIZE);
+      size_t len = (var->nType == TSDB_DATA_TYPE_BINARY || var->nType == TSDB_DATA_TYPE_NCHAR) ? var->nLen : MAX_NUM_STR_SIZE;
+      fi->data = calloc(1, len + 1 + VARSTR_HEADER_SIZE);
     } else if (type == TSDB_DATA_TYPE_NCHAR) {
-      fi->data = calloc(1, (var->nLen + VARSTR_HEADER_SIZE) * TSDB_NCHAR_SIZE);
+      size_t len = (var->nType == TSDB_DATA_TYPE_BINARY || var->nType == TSDB_DATA_TYPE_NCHAR) ? var->nLen : MAX_NUM_STR_SIZE;    
+      fi->data = calloc(1, (len + 1) * TSDB_NCHAR_SIZE + VARSTR_HEADER_SIZE);
     } else {
       if (var->nType == TSDB_DATA_TYPE_VALUE_ARRAY) {  //TIME RANGE
         fi->data = calloc(var->nLen, tDataTypes[type].bytes);