53 lines
1.2 KiB
C
53 lines
1.2 KiB
C
#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include "tudf.h"
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#undef malloc
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#define malloc malloc
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#undef free
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#define free free
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int32_t udf2_init() {
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return 0;
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}
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int32_t udf2_destroy() {
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return 0;
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}
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int32_t udf2_start(SUdfInterBuf *buf) {
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*(int64_t*)(buf->buf) = 0;
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buf->bufLen = sizeof(int64_t);
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buf->numOfResult = 0;
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return 0;
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}
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int32_t udf2(SUdfDataBlock* block, SUdfInterBuf *interBuf, SUdfInterBuf *newInterBuf) {
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int64_t sumSquares = *(int64_t*)interBuf->buf;
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for (int32_t i = 0; i < block->numOfCols; ++i) {
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for (int32_t j = 0; j < block->numOfRows; ++j) {
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SUdfColumn* col = block->udfCols[i];
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//TODO: check the bitmap for null value
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int32_t* rows = (int32_t*)col->colData.fixLenCol.data;
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sumSquares += rows[j] * rows[j];
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}
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}
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*(int64_t*)(newInterBuf->buf) = sumSquares;
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newInterBuf->bufLen = sizeof(int64_t);
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//TODO: if all null value, numOfResult = 0;
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newInterBuf->numOfResult = 1;
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return 0;
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}
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int32_t udf2_finish(SUdfInterBuf* buf, SUdfInterBuf *resultData) {
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//TODO: check numOfResults;
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int64_t sumSquares = *(int64_t*)(buf->buf);
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*(double*)(resultData->buf) = sqrt(sumSquares);
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resultData->bufLen = sizeof(double);
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resultData->numOfResult = 1;
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return 0;
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}
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