test: add udf2_dup test case

source/libs/function/test/udf2_dup.c

@@ -0,0 +1,78 @@
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "taosudf.h"
+
+DLL_EXPORT int32_t udf2_dup_init() { return 0; }
+
+DLL_EXPORT int32_t udf2_dup_destroy() { return 0; }
+
+DLL_EXPORT int32_t udf2_dup_start(SUdfInterBuf* buf) {
+  *(int64_t*)(buf->buf) = 0;
+  buf->bufLen = sizeof(double);
+  buf->numOfResult = 1;
+  return 0;
+}
+
+DLL_EXPORT int32_t udf2_dup(SUdfDataBlock* block, SUdfInterBuf* interBuf, SUdfInterBuf* newInterBuf) {
+  double sumSquares = 0;
+  if (interBuf->numOfResult == 1) {
+    sumSquares = *(double*)interBuf->buf;
+  }
+  int8_t numNotNull = 0;
+  for (int32_t i = 0; i < block->numOfCols; ++i) {
+    SUdfColumn* col = block->udfCols[i];
+    if (!(col->colMeta.type == TSDB_DATA_TYPE_INT || col->colMeta.type == TSDB_DATA_TYPE_DOUBLE)) {
+      return TSDB_CODE_UDF_INVALID_INPUT;
+    }
+  }
+  for (int32_t i = 0; i < block->numOfCols; ++i) {
+    for (int32_t j = 0; j < block->numOfRows; ++j) {
+      SUdfColumn* col = block->udfCols[i];
+      if (udfColDataIsNull(col, j)) {
+        continue;
+      }
+      switch (col->colMeta.type) {
+        case TSDB_DATA_TYPE_INT: {
+          char*   cell = udfColDataGetData(col, j);
+          int32_t num = *(int32_t*)cell;
+          sumSquares += (double)num * num;
+          break;
+        }
+        case TSDB_DATA_TYPE_DOUBLE: {
+          char*  cell = udfColDataGetData(col, j);
+          double num = *(double*)cell;
+          sumSquares += num * num;
+          break;
+        }
+        default:
+          break;
+      }
+      ++numNotNull;
+    }
+  }
+
+  *(double*)(newInterBuf->buf) = sumSquares;
+  newInterBuf->bufLen = sizeof(double);
+
+  if (interBuf->numOfResult == 0 && numNotNull == 0) {
+    newInterBuf->numOfResult = 0;
+  } else {
+    newInterBuf->numOfResult = 1;
+  }
+  return 0;
+}
+
+DLL_EXPORT int32_t udf2_dup_finish(SUdfInterBuf* buf, SUdfInterBuf* resultData) {
+  if (buf->numOfResult == 0) {
+    resultData->numOfResult = 0;
+    return 0;
+  }
+  double sumSquares = *(double*)(buf->buf);
+  *(double*)(resultData->buf) = sqrt(sumSquares) + 100;
+  resultData->bufLen = sizeof(double);
+  resultData->numOfResult = 1;
+  return 0;
+}