From 300f35188e0c2887bb6d25f5805e131a29f80733 Mon Sep 17 00:00:00 2001
From: Haojun Liao <hjliao@taosdata.com>
Date: Wed, 22 Jun 2022 21:18:11 +0800
Subject: [PATCH] fix(query): prepare the SColumnInfoData.

---
 source/common/src/tdatablock.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/source/common/src/tdatablock.c b/source/common/src/tdatablock.c
index 168d949631..93d3661caf 100644
--- a/source/common/src/tdatablock.c
+++ b/source/common/src/tdatablock.c
@@ -1856,6 +1856,11 @@ const char* blockCompressDecode(SSDataBlock* pBlock, int32_t numOfCols, int32_t
   pBlock->info.groupId = *(uint64_t*)pStart;
   pStart += sizeof(uint64_t);
 
+  if (pBlock->pDataBlock == NULL) {
+    pBlock->pDataBlock = taosArrayInit(numOfCols, sizeof(SColumnInfoData));
+    taosArraySetSize(pBlock->pDataBlock, numOfCols);
+  }
+
   for (int32_t i = 0; i < numOfCols; ++i) {
     SColumnInfoData* pColInfoData = taosArrayGet(pBlock->pDataBlock, i);
     pColInfoData->info.type = *(int16_t*)pStart;