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Merge pull request #19825 from taosdata/fix/nodisk 

fix(query):set null for if the queried table is dropped
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Haojun Liao 2023-02-07 09:19:58 +08:00 committed by GitHub
parent dda20bd5cb 2d951c1690
commit 46fb9227f1
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 20 additions and 0 deletions
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20
source/libs/executor/src/scanoperator.c
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@ -446,6 +446,16 @@ static STableCachedVal* createTableCacheVal(const SMetaReader* pMetaReader) {
// const void *key, size_t keyLen, void *value
static void freeCachedMetaItem(const void* key, size_t keyLen, void* value) { freeTableCachedVal(value); }
static void doSetNullValue(SSDataBlock* pBlock, const SExprInfo* pExpr, int32_t numOfExpr) {
for (int32_t j = 0; j < numOfExpr; ++j) {
int32_t dstSlotId = pExpr[j].base.resSchema.slotId;
SColumnInfoData* pColInfoData = taosArrayGet(pBlock->pDataBlock, dstSlotId);
colDataAppendNNULL(pColInfoData, 0, pBlock->info.rows);
}
}
int32_t addTagPseudoColumnData(SReadHandle* pHandle, const SExprInfo* pExpr, int32_t numOfExpr, SSDataBlock* pBlock,
int32_t rows, const char* idStr, STableMetaCacheInfo* pCache) {
// currently only the tbname pseudo column
@ -465,14 +475,22 @@ int32_t addTagPseudoColumnData(SReadHandle* pHandle, const SExprInfo* pExpr, int
SMetaReader mr = {0};
LRUHandle* h = NULL;
// todo refactor: extract method
// the handling of the null data should be packed in the extracted method
// 1. check if it is existed in meta cache
if (pCache == NULL) {
metaReaderInit(&mr, pHandle->meta, 0);
code = metaGetTableEntryByUidCache(&mr, pBlock->info.id.uid);
if (code != TSDB_CODE_SUCCESS) {
// when encounter the TSDB_CODE_PAR_TABLE_NOT_EXIST error, we proceed.
if (terrno == TSDB_CODE_PAR_TABLE_NOT_EXIST) {
qWarn("failed to get table meta, table may have been dropped, uid:0x%" PRIx64 ", code:%s, %s",
pBlock->info.id.uid, tstrerror(terrno), idStr);
// append null value before return to caller, since the caller will ignore this error code and proceed
doSetNullValue(pBlock, pExpr, numOfExpr);
} else {
qError("failed to get table meta, uid:0x%" PRIx64 ", code:%s, %s", pBlock->info.id.uid, tstrerror(terrno),
idStr);
@ -498,6 +516,8 @@ int32_t addTagPseudoColumnData(SReadHandle* pHandle, const SExprInfo* pExpr, int
if (terrno == TSDB_CODE_PAR_TABLE_NOT_EXIST) {
qWarn("failed to get table meta, table may have been dropped, uid:0x%" PRIx64 ", code:%s, %s",
pBlock->info.id.uid, tstrerror(terrno), idStr);
// append null value before return to caller, since the caller will ignore this error code and proceed
doSetNullValue(pBlock, pExpr, numOfExpr);
} else {
qError("failed to get table meta, uid:0x%" PRIx64 ", code:%s, %s", pBlock->info.id.uid, tstrerror(terrno),
idStr);