fix: add scalar example bitwise_and.c

tests/script/sh/bitwise_and.c

+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include "taosudf.h"
+
+
+DLL_EXPORT int32_t bitwise_and_init() {
+    return 0;
+}
+
+DLL_EXPORT int32_t bitwise_and_destroy() {
+    return 0;
+}
+
+DLL_EXPORT int32_t bitwise_and(SUdfDataBlock* block, SUdfColumn *resultCol) {
+
+    if (block->numOfCols < 2) {
+        return TSDB_CODE_UDF_INVALID_INPUT;
+    }
+
+    for (int32_t i = 0; i < block->numOfCols; ++i) {
+        SUdfColumn* col = block->udfCols[i];
+        if (!(col->colMeta.type == TSDB_DATA_TYPE_INT)) {
+            return TSDB_CODE_UDF_INVALID_INPUT;
+        }
+    }
+
+    SUdfColumnMeta *meta = &resultCol->colMeta;
+    meta->bytes = 4;
+    meta->type = TSDB_DATA_TYPE_INT;
+    meta->scale = 0;
+    meta->precision = 0;
+
+
+    SUdfColumnData *resultData = &resultCol->colData;
+
+    resultData->numOfRows = block->numOfRows;
+
+    for (int32_t i = 0; i < resultData->numOfRows; ++i) {
+        int32_t result = *(int32_t*)udfColDataGetData(block->udfCols[0], i);
+        int j = 1;
+        for (; j < block->numOfCols; ++j) {
+            if (udfColDataIsNull(block->udfCols[j], i)) {
+                udfColDataSetNull(resultCol, i);
+                break;
+            }
+
+            char* colData = udfColDataGetData(block->udfCols[j], i);
+            result &= *(int32_t*)colData;
+        }
+        if (j == block->numOfCols) {
+            udfColDataSet(resultCol, i, (char*)&result, false);
+        }
+
+    }
+    return TSDB_CODE_SUCCESS;
+}