feat: change bufSize to leave space for var string header

76f38ee0 · shenglian zhou · de1ca5b6 · 76f38ee0
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source/libs/executor/src/scanoperator.c source/libs/executor/src/scanoperator.c +1 -1

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--- a/source/libs/executor/src/scanoperator.c
+++ b/source/libs/executor/src/scanoperator.c
@@ -1978,7 +1978,7 @@ static SSDataBlock* sysTableScanUserTags(SOperatorInfo* pOperator) {
        }
      }
-      int32_t bufSize = IS_VAR_DATA_TYPE(tagType) ? tagLen : 1024;
+      int32_t bufSize = IS_VAR_DATA_TYPE(tagType) ? tagLen + VARSTR_HEADER_SIZE : 1024;
      char*   tagVarChar = NULL;
      if (tagData != NULL) {
        tagVarChar = taosMemoryMalloc(bufSize);