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[TD-5438]<feature> enhance distinct

This commit is contained in:
yihaoDeng 2021-07-22 05:03:45 +08:00
parent a54d3a2b96
commit cacf85993e
1 changed files with 24 additions and 9 deletions
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33
src/client/src/tscSQLParser.c
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@ -1947,12 +1947,13 @@ bool isValidDistinctSql(SQueryInfo* pQueryInfo) {
if (pQueryInfo == NULL) {
return false;
}
if ((pQueryInfo->type & TSDB_QUERY_TYPE_STABLE_QUERY) != TSDB_QUERY_TYPE_STABLE_QUERY) {
if ((pQueryInfo->type & TSDB_QUERY_TYPE_STABLE_QUERY) != TSDB_QUERY_TYPE_STABLE_QUERY
&& (pQueryInfo->type & TSDB_QUERY_TYPE_TABLE_QUERY) != TSDB_QUERY_TYPE_TABLE_QUERY) {
return false;
}
if (tscQueryTags(pQueryInfo) && tscNumOfExprs(pQueryInfo) == 1){
if (tscNumOfExprs(pQueryInfo) == 1){
return true;
}
}
return false;
}
@ -2041,7 +2042,7 @@ int32_t validateSelectNodeList(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, SArray* pS
const char* msg1 = "too many items in selection clause";
const char* msg2 = "functions or others can not be mixed up";
const char* msg3 = "not support query expression";
const char* msg4 = "only support distinct one tag";
const char* msg4 = "only support distinct one column or tag";
const char* msg5 = "invalid function name";
// too many result columns not support order by in query
@ -2101,13 +2102,13 @@ int32_t validateSelectNodeList(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, SArray* pS
}
if (hasDistinct == true) {
if (!isValidDistinctSql(pQueryInfo)) {
if (!isValidDistinctSql(pQueryInfo) ) {
return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), msg4);
}
pQueryInfo->distinctTag = true;
pQueryInfo->distinct = true;
}
// there is only one user-defined column in the final result field, add the timestamp column.
size_t numOfSrcCols = taosArrayGetSize(pQueryInfo->colList);
if ((numOfSrcCols <= 0 || !hasNoneUserDefineExpr(pQueryInfo)) && !tscQueryTags(pQueryInfo) && !tscQueryBlockInfo(pQueryInfo)) {
@ -3971,8 +3972,10 @@ static int32_t getTablenameCond(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, tSqlExpr*
static int32_t getColumnQueryCondInfo(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, tSqlExpr* pExpr, int32_t relOptr) {
if (pExpr == NULL) {
pQueryInfo->onlyHasTagCond &= true;
return TSDB_CODE_SUCCESS;
}
pQueryInfo->onlyHasTagCond &= false;
if (!tSqlExprIsParentOfLeaf(pExpr)) { // internal node
int32_t ret = getColumnQueryCondInfo(pCmd, pQueryInfo, pExpr->pLeft, pExpr->tokenId);
@ -4099,6 +4102,7 @@ static int32_t checkAndSetJoinCondInfo(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, tS
static int32_t getJoinCondInfo(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, tSqlExpr* pExpr) {
if (pExpr == NULL) {
pQueryInfo->onlyHasTagCond &= true;
return TSDB_CODE_SUCCESS;
}
@ -4778,8 +4782,11 @@ static int32_t getTimeRangeFromExpr(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, tSqlE
int32_t code = 0;
if (pExpr == NULL) {
pQueryInfo->onlyHasTagCond &= true;
return TSDB_CODE_SUCCESS;
}
pQueryInfo->onlyHasTagCond &= false;
if (!tSqlExprIsParentOfLeaf(pExpr)) {
if (pExpr->tokenId == TK_OR) {
@ -4828,11 +4835,13 @@ static int32_t validateJoinExpr(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, SCondExpr
if (!QUERY_IS_JOIN_QUERY(pQueryInfo->type)) {
if (pQueryInfo->numOfTables == 1) {
pQueryInfo->onlyHasTagCond &= true;
return TSDB_CODE_SUCCESS;
} else {
return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), msg3);
}
}
pQueryInfo->onlyHasTagCond &= false;
STableMetaInfo* pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
if (UTIL_TABLE_IS_SUPER_TABLE(pTableMetaInfo)) { // for stable join, tag columns
@ -5145,12 +5154,13 @@ int32_t validateWhereNode(SQueryInfo* pQueryInfo, tSqlExpr** pExpr, SSqlObj* pSq
if (pExpr == NULL) {
return TSDB_CODE_SUCCESS;
}
const char* msg1 = "invalid expression";
const char* msg2 = "invalid filter expression";
int32_t ret = TSDB_CODE_SUCCESS;
pQueryInfo->onlyHasTagCond = true;
// tags query condition may be larger than 512bytes, therefore, we need to prepare enough large space
SStringBuilder sb; memset(&sb, 0, sizeof(sb));
SCondExpr condExpr = {0};
@ -5178,6 +5188,7 @@ int32_t validateWhereNode(SQueryInfo* pQueryInfo, tSqlExpr** pExpr, SSqlObj* pSq
if ((ret = getTimeRangeFromExpr(&pSql->cmd, pQueryInfo, condExpr.pTimewindow)) != TSDB_CODE_SUCCESS) {
return ret;
}
// 3. get the tag query condition
if ((ret = getTagQueryCondExpr(&pSql->cmd, pQueryInfo, &condExpr, pExpr)) != TSDB_CODE_SUCCESS) {
@ -5487,7 +5498,7 @@ int32_t validateOrderbyNode(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, SSqlNode* pSq
STableMetaInfo* pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
if (pQueryInfo->distinctTag == true) {
if (pQueryInfo->distinct == true) {
pQueryInfo->order.order = TSDB_ORDER_ASC;
pQueryInfo->order.orderColId = 0;
return TSDB_CODE_SUCCESS;
@ -8583,6 +8594,10 @@ int32_t validateSqlNode(SSqlObj* pSql, SSqlNode* pSqlNode, SQueryInfo* pQueryInf
return TSDB_CODE_TSC_INVALID_OPERATION;
}
if (isSTable && tscQueryTags(pQueryInfo) && pQueryInfo->distinct && !pQueryInfo->onlyHasTagCond) {
return TSDB_CODE_TSC_INVALID_OPERATION;
}
// parse the window_state
if (validateStateWindowNode(pCmd, pQueryInfo, pSqlNode, isSTable) != TSDB_CODE_SUCCESS) {
return TSDB_CODE_TSC_INVALID_OPERATION;