[TD-2090]

src/client/src/tscFunctionImpl.c

@@ -130,11 +130,11 @@ typedef struct STopBotInfo {
 } STopBotInfo;
 
 // leastsquares do not apply to super table
-typedef struct SLeastsquareInfo {
+typedef struct SLeastsquaresInfo {
   double  mat[2][3];
   double  startVal;
   int64_t num;
-} SLeastsquareInfo;
+} SLeastsquaresInfo;
 
 typedef struct SAPercentileInfo {
   SHistogramInfo *pHisto;
@@ -316,7 +316,7 @@ int32_t getResultDataInfo(int32_t dataType, int32_t dataBytes, int32_t functionI
     *interBytes = (int16_t)sizeof(SPercentileInfo);
   } else if (functionId == TSDB_FUNC_LEASTSQR) {
     *type = TSDB_DATA_TYPE_BINARY;
-    *bytes = TSDB_AVG_FUNCTION_INTER_BUFFER_SIZE;  // string
+    *bytes = MAX(TSDB_AVG_FUNCTION_INTER_BUFFER_SIZE, sizeof(SLeastsquaresInfo));  // string
     *interBytes = *bytes;
   } else if (functionId == TSDB_FUNC_FIRST_DST || functionId == TSDB_FUNC_LAST_DST) {
     *type = TSDB_DATA_TYPE_BINARY;
@@ -2756,7 +2756,7 @@ static bool leastsquares_function_setup(SQLFunctionCtx *pCtx) {
   }
   
   SResultRowCellInfo *     pResInfo = GET_RES_INFO(pCtx);
-  SLeastsquareInfo *pInfo = GET_ROWCELL_INTERBUF(pResInfo);
+  SLeastsquaresInfo *pInfo = GET_ROWCELL_INTERBUF(pResInfo);
   
   // 2*3 matrix
   pInfo->startVal = pCtx->param[0].dKey;
@@ -2783,7 +2783,7 @@ static bool leastsquares_function_setup(SQLFunctionCtx *pCtx) {
 
 static void leastsquares_function(SQLFunctionCtx *pCtx) {
   SResultRowCellInfo *     pResInfo = GET_RES_INFO(pCtx);
-  SLeastsquareInfo *pInfo = GET_ROWCELL_INTERBUF(pResInfo);
+  SLeastsquaresInfo *pInfo = GET_ROWCELL_INTERBUF(pResInfo);
   
   double(*param)[3] = pInfo->mat;
   double x = pInfo->startVal;
@@ -2853,40 +2853,40 @@ static void leastsquares_function_f(SQLFunctionCtx *pCtx, int32_t index) {
     return;
   }
   
-  SResultRowCellInfo *     pResInfo = GET_RES_INFO(pCtx);
-  SLeastsquareInfo *pInfo = GET_ROWCELL_INTERBUF(pResInfo);
+  SResultRowCellInfo *pResInfo = GET_RES_INFO(pCtx);
+  SLeastsquaresInfo *pInfo = GET_ROWCELL_INTERBUF(pResInfo);
   
   double(*param)[3] = pInfo->mat;
   
   switch (pCtx->inputType) {
     case TSDB_DATA_TYPE_INT: {
       int32_t *p = pData;
-      LEASTSQR_CAL(param, pInfo->startVal, p, index, pCtx->param[1].dKey);
+      LEASTSQR_CAL(param, pInfo->startVal, p, 0, pCtx->param[1].dKey);
       break;
     };
     case TSDB_DATA_TYPE_TINYINT: {
       int8_t *p = pData;
-      LEASTSQR_CAL(param, pInfo->startVal, p, index, pCtx->param[1].dKey);
+      LEASTSQR_CAL(param, pInfo->startVal, p, 0, pCtx->param[1].dKey);
       break;
     }
     case TSDB_DATA_TYPE_SMALLINT: {
       int16_t *p = pData;
-      LEASTSQR_CAL(param, pInfo->startVal, p, index, pCtx->param[1].dKey);
+      LEASTSQR_CAL(param, pInfo->startVal, p, 0, pCtx->param[1].dKey);
       break;
     }
     case TSDB_DATA_TYPE_BIGINT: {
       int64_t *p = pData;
-      LEASTSQR_CAL(param, pInfo->startVal, p, index, pCtx->param[1].dKey);
+      LEASTSQR_CAL(param, pInfo->startVal, p, 0, pCtx->param[1].dKey);
       break;
     }
     case TSDB_DATA_TYPE_FLOAT: {
       float *p = pData;
-      LEASTSQR_CAL(param, pInfo->startVal, p, index, pCtx->param[1].dKey);
+      LEASTSQR_CAL(param, pInfo->startVal, p, 0, pCtx->param[1].dKey);
       break;
     }
     case TSDB_DATA_TYPE_DOUBLE: {
       double *p = pData;
-      LEASTSQR_CAL(param, pInfo->startVal, p, index, pCtx->param[1].dKey);
+      LEASTSQR_CAL(param, pInfo->startVal, p, 0, pCtx->param[1].dKey);
       break;
     }
     default:
@@ -2904,15 +2904,10 @@ static void leastsquares_function_f(SQLFunctionCtx *pCtx, int32_t index) {
 static void leastsquares_finalizer(SQLFunctionCtx *pCtx) {
   // no data in query
   SResultRowCellInfo *     pResInfo = GET_RES_INFO(pCtx);
-  SLeastsquareInfo *pInfo = GET_ROWCELL_INTERBUF(pResInfo);
+  SLeastsquaresInfo *pInfo = GET_ROWCELL_INTERBUF(pResInfo);
   
   if (pInfo->num == 0) {
-    if (pCtx->outputType == TSDB_DATA_TYPE_BINARY || pCtx->outputType == TSDB_DATA_TYPE_NCHAR) {
-      setVardataNull(pCtx->aOutputBuf, pCtx->outputType);
-    } else {
-      setNull(pCtx->aOutputBuf, pCtx->outputType, pCtx->outputBytes);
-    }
-    
+    setNull(pCtx->aOutputBuf, pCtx->outputType, pCtx->outputBytes);
     return;
   }
   

src/query/src/qExecutor.c

@@ -1257,7 +1257,7 @@ static bool functionNeedToExecute(SQueryRuntimeEnv *pRuntimeEnv, SQLFunctionCtx
     return QUERY_IS_ASC_QUERY(pQuery);
   }
 
-  // todo add comments
+  // denote the order type
   if ((functionId == TSDB_FUNC_LAST_DST || functionId == TSDB_FUNC_LAST)) {
     return pCtx->param[0].i64Key == pQuery->order.order;
   }
@@ -2419,7 +2419,7 @@ static void ensureOutputBufferSimple(SQueryRuntimeEnv* pRuntimeEnv, int32_t capa
     assert(bytes > 0 && capacity > 0);
 
     char *tmp = realloc(pQuery->sdata[i], bytes * capacity + sizeof(tFilePage));
-    if (tmp == NULL) {  // todo handle the oom
+    if (tmp == NULL) {
       longjmp(pRuntimeEnv->env, TSDB_CODE_QRY_OUT_OF_MEMORY);
     } else {
       pQuery->sdata[i] = (tFilePage *)tmp;
@@ -2450,7 +2450,7 @@ static void ensureOutputBuffer(SQueryRuntimeEnv* pRuntimeEnv, SDataBlockInfo* pB
         assert(bytes > 0 && newSize > 0);
 
         char *tmp = realloc(pQuery->sdata[i], bytes * newSize + sizeof(tFilePage));
-        if (tmp == NULL) {  // todo handle the oom
+        if (tmp == NULL) {
           longjmp(pRuntimeEnv->env, TSDB_CODE_QRY_OUT_OF_MEMORY);
         } else {
           memset(tmp + sizeof(tFilePage) + bytes * pRec->rows, 0, (size_t)((newSize - pRec->rows) * bytes));
@@ -3343,11 +3343,11 @@ void resetCtxOutputBuf(SQueryRuntimeEnv *pRuntimeEnv) {
   SQuery *pQuery = pRuntimeEnv->pQuery;
 
   SResultRow* pRow = NULL;
-  if (pRuntimeEnv->windowResInfo.size == 0) {
+//  if (pRuntimeEnv->windowResInfo.size == 0) {
     int32_t groupIndex = 0;
     int32_t uid = 0;
     pRow = doPrepareResultRowFromKey(pRuntimeEnv, &pRuntimeEnv->windowResInfo, (char *)&groupIndex, sizeof(groupIndex), true, uid);
-  }
+
 
   for (int32_t i = 0; i < pQuery->numOfOutput; ++i) {
     SQLFunctionCtx *pCtx = &pRuntimeEnv->pCtx[i];

tests/script/general/parser/groupby.sim

@@ -534,7 +534,7 @@ if $data03 != 99.000000000 then
 endi
 
 print ============>td-1765
-sql select percentile(c4, 49),min(c4),max(c4),avg(c4),stddev(c4) from group_tb0  group by c8;
+sql select percentile(c4, 49),min(c4),max(c4),avg(c4),stddev(c4) from group_tb0 group by c8;
 if $rows != 100 then
   return -1
 endi
@@ -579,6 +579,24 @@ if $data14 != 2886.607004772 then
   return -1
 endi
 
+print ================>td-2090
+sql select leastsquares(c2, 1, 1) from group_tb1  group by c8;
+if $rows != 100 then
+ return -1
+endi
+
+if $data00 != @{slop:0.000000, intercept:0.000000}@ then
+  return -1
+endi
+
+if $data10 != @{slop:0.000000, intercept:1.000000}@ then
+  return -1
+endi
+
+if $data90 != @{slop:0.000000, intercept:9.000000}@ then
+  return -1
+endi
+
 #=========================== group by multi tags ======================
 sql create table st (ts timestamp, c int) tags (t1 int, t2 int, t3 int, t4 int);
 sql create table t1 using st tags(1, 1, 1, 1);