fix varchr len issue

741ec2f5 · dapan1121 · 5fc9aa5e · 741ec2f5
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source/libs/nodes/src/nodesCodeFuncs.c source/libs/nodes/src/nodesCodeFuncs.c +1 -1

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--- a/source/libs/nodes/src/nodesCodeFuncs.c
+++ b/source/libs/nodes/src/nodesCodeFuncs.c
@@ -2177,7 +2177,7 @@ static int32_t jsonToDatum(const SJson* pJson, void* pObj) {
        code = TSDB_CODE_OUT_OF_MEMORY;
        break;
      }
-      varDataSetLen(pNode->datum.p, pNode->node.resType.bytes);
+      varDataSetLen(pNode->datum.p, pNode->node.resType.bytes - VARSTR_HEADER_SIZE);
      if (TSDB_DATA_TYPE_NCHAR == pNode->node.resType.type) {
        char* buf = taosMemoryCalloc(1, pNode->node.resType.bytes * 2 + VARSTR_HEADER_SIZE + 1);
        if (NULL == buf) {