fix: support fetching specific schema version from table

source/common/src/trow.c

@@ -605,6 +605,10 @@ static int32_t tdAppendKvRowToDataCol(STSRow *pRow, STSchema *pSchema, SDataCols
  * @param pCols
  */
 int32_t tdAppendSTSRowToDataCol(STSRow *pRow, STSchema *pSchema, SDataCols *pCols, bool isMerge) {
+#ifdef TD_DEBUG_PRINT_TSDB_LOAD_DCOLS
+  printf("%s:%d ts: %" PRIi64 " sver:%d maxCols:%" PRIi16 " nCols:%" PRIi16 ", nRows:%d\n", __func__, __LINE__,
+         TD_ROW_KEY(pRow), TD_ROW_SVER(pRow), pCols->maxCols, pCols->numOfCols, pCols->numOfRows);
+#endif
   if (TD_IS_TP_ROW(pRow)) {
     return tdAppendTpRowToDataCol(pRow, pSchema, pCols, isMerge);
   } else if (TD_IS_KV_ROW(pRow)) {

source/dnode/vnode/src/inc/tsdb.h

@@ -79,7 +79,8 @@ struct STsdb {
 struct STable {
   uint64_t  tid;
   uint64_t  uid;
-  STSchema *pSchema;
+  STSchema *pSchema;       // latest schema
+  STSchema *pCacheSchema;  // cached cache
 };
 
 #define TABLE_TID(t) (t)->tid
@@ -181,12 +182,15 @@ int tsdbUnlockRepo(STsdb *pTsdb);
 
 static FORCE_INLINE STSchema *tsdbGetTableSchemaImpl(STsdb *pTsdb, STable *pTable, bool lock, bool copy,
                                                      int32_t version) {
-  if ((version != -1) && (schemaVersion(pTable->pSchema) != version)) {
-    taosMemoryFreeClear(pTable->pSchema);
-    pTable->pSchema = metaGetTbTSchema(REPO_META(pTsdb), pTable->uid, version);
+  if (version < 0) {
+    return pTable->pSchema;
   }
-
-  return pTable->pSchema;
+  
+  if (!pTable->pCacheSchema || (schemaVersion(pTable->pCacheSchema) != version)) {
+    taosMemoryFreeClear(pTable->pCacheSchema);
+    pTable->pCacheSchema = metaGetTbTSchema(REPO_META(pTsdb), pTable->uid, version);
+  }
+  return pTable->pCacheSchema;
 }
 
 // tsdbMemTable.h

source/dnode/vnode/src/meta/metaQuery.c

@@ -300,7 +300,7 @@ STSchema *metaGetTbTSchema(SMeta *pMeta, tb_uid_t uid, int32_t sver) {
   pSW = metaGetTableSchema(pMeta, quid, sver, 0);
   if (!pSW) return NULL;
 
-  tdInitTSchemaBuilder(&sb, sver);
+  tdInitTSchemaBuilder(&sb, pSW->version);
   for (int i = 0; i < pSW->nCols; i++) {
     pSchema = pSW->pSchema + i;
     tdAddColToSchema(&sb, pSchema->type, pSchema->flags, pSchema->colId, pSchema->bytes);

source/dnode/vnode/src/sma/smaRollup.c

@@ -441,7 +441,7 @@ static int32_t tdExecuteRSma(SSma *pSma, const void *pMsg, int32_t inputType, tb
 
   if (inputType == STREAM_DATA_TYPE_SUBMIT_BLOCK) {
     // TODO: use the proper schema instead of 0, and cache STSchema in cache
-    STSchema *pTSchema = metaGetTbTSchema(SMA_META(pSma), suid, 1);
+    STSchema *pTSchema = metaGetTbTSchema(SMA_META(pSma), suid, -1);
     if (!pTSchema) {
       terrno = TSDB_CODE_TDB_IVD_TB_SCHEMA_VERSION;
       return TSDB_CODE_FAILED;

source/dnode/vnode/src/tsdb/tsdbCommit.c

@@ -466,7 +466,7 @@ static int tsdbCreateCommitIters(SCommitH *pCommith) {
     pTbData = (STbData *)pNode->pData;
 
     pCommitIter = pCommith->iters + i;
-    pTSchema = metaGetTbTSchema(REPO_META(pRepo), pTbData->uid, -1);  // TODO: schema version
+    pTSchema = metaGetTbTSchema(REPO_META(pRepo), pTbData->uid, -1);
 
     if (pTSchema) {
       pCommitIter->pIter = tSkipListCreateIter(pTbData->pData);
@@ -475,7 +475,8 @@ static int tsdbCreateCommitIters(SCommitH *pCommith) {
       pCommitIter->pTable = (STable *)taosMemoryMalloc(sizeof(STable));
       pCommitIter->pTable->uid = pTbData->uid;
       pCommitIter->pTable->tid = pTbData->uid;
-      pCommitIter->pTable->pSchema = pTSchema;  // metaGetTbTSchema(REPO_META(pRepo), pTbData->uid, 0);
+      pCommitIter->pTable->pSchema = pTSchema;
+      pCommitIter->pTable->pCacheSchema = NULL;
     }
   }
   tSkipListDestroyIter(pSlIter);
@@ -490,6 +491,7 @@ static void tsdbDestroyCommitIters(SCommitH *pCommith) {
     tSkipListDestroyIter(pCommith->iters[i].pIter);
     if (pCommith->iters[i].pTable) {
       tdFreeSchema(pCommith->iters[i].pTable->pSchema);
+      tdFreeSchema(pCommith->iters[i].pTable->pCacheSchema);
       taosMemoryFreeClear(pCommith->iters[i].pTable);
     }
   }
@@ -914,7 +916,7 @@ static int tsdbMoveBlkIdx(SCommitH *pCommith, SBlockIdx *pIdx) {
   while (bidx < nBlocks) {
     if (!pTSchema && !tsdbCommitIsSameFile(pCommith, bidx)) {
       // Set commit table
-      pTSchema = metaGetTbTSchema(REPO_META(pTsdb), pIdx->uid, 1);  // TODO: schema version
+      pTSchema = metaGetTbTSchema(REPO_META(pTsdb), pIdx->uid, -1);  // TODO: schema version
       if (!pTSchema) {
         terrno = TSDB_CODE_OUT_OF_MEMORY;
         return -1;