fix tdb problem

.gitignore

@@ -40,6 +40,7 @@ taosdalipu/
 Target/
 *.failed
 *.sql
+sim
 sim/
 psim/
 pysim/

source/libs/tdb/src/db/tdbPCache.c

@@ -115,12 +115,9 @@ void tdbPCacheRelease(SPCache *pCache, SPage *pPage, TXN *pTxn) {
           tdbPCacheRemovePageFromHash(pCache, pPage);
         }
 
-        // free the page
-        if (pTxn && pTxn->xFree) {
         tdbPageDestroy(pPage, pTxn->xFree, pTxn->xArg);
       }
     }
-    }
 
     tdbPCacheUnlock(pCache);
   }
@@ -195,6 +192,7 @@ static SPage *tdbPCacheFetchImpl(SPCache *pCache, const SPgid *pPgid, TXN *pTxn)
       pPage->pPager = pPageH->pPager;
 
       memcpy(pPage->pData, pPageH->pData, pPage->pageSize);
+      tdbPageInit(pPage, pPageH->pPageHdr - pPageH->pData, pPageH->xCellSize);
     } else {
       memcpy(&(pPage->pgid), pPgid, sizeof(*pPgid));
       pPage->pLruNext = NULL;
@@ -294,7 +292,7 @@ static int tdbPCacheOpenImpl(SPCache *pCache) {
 
   // Open the hash table
   pCache->nPage = 0;
-  pCache->nHash = pCache->cacheSize;
+  pCache->nHash = pCache->cacheSize < 8 ? 8 : pCache->cacheSize;
   pCache->pgHash = (SPage **)tdbOsCalloc(pCache->nHash, sizeof(SPage *));
   if (pCache->pgHash == NULL) {
     // TODO

source/libs/tdb/test/tdbTest.cpp

@@ -229,3 +229,86 @@ TEST(tdb_test, simple_test) {
   ret = tdbEnvClose(pEnv);
   GTEST_ASSERT_EQ(ret, 0);
 }
+
+TEST(tdb_test, simple_test2) {
+  int            ret;
+  TENV          *pEnv;
+  TDB           *pDb;
+  FKeyComparator compFunc;
+  int            nData = 10000;
+  TXN            txn;
+
+  // Open Env
+  ret = tdbEnvOpen("tdb", 1024, 0, &pEnv);
+  GTEST_ASSERT_EQ(ret, 0);
+
+  // Create a database
+  compFunc = tKeyCmpr;
+  ret = tdbDbOpen("db.db", TDB_VARIANT_LEN, TDB_VARIANT_LEN, compFunc, pEnv, &pDb);
+  GTEST_ASSERT_EQ(ret, 0);
+
+  {
+    char      key[64];
+    char      val[64];
+    int64_t   txnid = 0;
+    SPoolMem *pPool;
+
+    // open the pool
+    pPool = openPool();
+
+    // start a transaction
+    txnid++;
+    tdbTxnOpen(&txn, txnid, poolMalloc, poolFree, pPool, TDB_TXN_WRITE | TDB_TXN_READ_UNCOMMITTED);
+    tdbBegin(pEnv, &txn);
+
+    for (int iData = 1; iData <= nData; iData++) {
+      sprintf(key, "key%d", iData);
+      sprintf(val, "value%d", iData);
+      ret = tdbDbInsert(pDb, key, strlen(key), val, strlen(val), &txn);
+      GTEST_ASSERT_EQ(ret, 0);
+    }
+
+    {  // Iterate to query the DB data
+      TDBC *pDBC;
+      void *pKey = NULL;
+      void *pVal = NULL;
+      int   vLen, kLen;
+      int   count = 0;
+
+      ret = tdbDbcOpen(pDb, &pDBC);
+      GTEST_ASSERT_EQ(ret, 0);
+
+      for (;;) {
+        ret = tdbDbNext(pDBC, &pKey, &kLen, &pVal, &vLen);
+        if (ret < 0) break;
+
+        std::cout.write((char *)pKey, kLen) /* << " " << kLen */ << " ";
+        std::cout.write((char *)pVal, vLen) /* << " " << vLen */;
+        std::cout << std::endl;
+
+        count++;
+      }
+
+      GTEST_ASSERT_EQ(count, nData);
+
+      tdbDbcClose(pDBC);
+
+      TDB_FREE(pKey);
+      TDB_FREE(pVal);
+    }
+  }
+
+  // commit the transaction
+  tdbCommit(pEnv, &txn);
+  tdbTxnClose(&txn);
+
+  ret = tdbDbDrop(pDb);
+  GTEST_ASSERT_EQ(ret, 0);
+
+  // Close a database
+  tdbDbClose(pDb);
+
+  // Close Env
+  ret = tdbEnvClose(pEnv);
+  GTEST_ASSERT_EQ(ret, 0);
+}