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fix: LEASTSQUARES func result stack overflow

This commit is contained in:
facetosea 2024-01-17 18:28:00 +08:00
parent fc16d26da2
commit f010e18ff0
4 changed files with 30 additions and 6 deletions
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4
include/libs/function/function.h
View File

@ -249,6 +249,10 @@ typedef struct SPoint {
int32_t taosGetLinearInterpolationVal(SPoint *point, int32_t outputType, SPoint *point1, SPoint *point2,
int32_t inputType);
#define LEASTSQUARES_DOUBLE_ITEM_LENGTH 25
#define LEASTSQUARES_BUFF_LENGTH 128
#define DOUBLE_PRECISION_DIGITS "16e"
#ifdef __cplusplus
}
#endif

2
source/libs/function/src/builtins.c
View File

@ -952,7 +952,7 @@ static int32_t translateLeastSQR(SFunctionNode* pFunc, char* pErrBuf, int32_t le
}
}
pFunc->node.resType = (SDataType){.bytes = 64, .type = TSDB_DATA_TYPE_BINARY};
pFunc->node.resType = (SDataType){.bytes = LEASTSQUARES_BUFF_LENGTH, .type = TSDB_DATA_TYPE_BINARY};
return TSDB_CODE_SUCCESS;
}

14
source/libs/function/src/builtinsimpl.c
View File

@ -1576,9 +1576,19 @@ int32_t leastSQRFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock) {
param12 /= param[1][1];
char buf[512] = {0};
char buf[LEASTSQUARES_BUFF_LENGTH] = {0};
char slopBuf[64] = {0};
char interceptBuf[64] = {0};
int n = snprintf(slopBuf, 64, "%.6lf", param02);
if (n > LEASTSQUARES_DOUBLE_ITEM_LENGTH) {
snprintf(slopBuf, 64, "%." DOUBLE_PRECISION_DIGITS, param02);
}
n = snprintf(interceptBuf, 64, "%.6lf", param12);
if (n > LEASTSQUARES_DOUBLE_ITEM_LENGTH) {
snprintf(interceptBuf, 64, "%." DOUBLE_PRECISION_DIGITS, param12);
}
size_t len =
snprintf(varDataVal(buf), sizeof(buf) - VARSTR_HEADER_SIZE, "{slop:%.6lf, intercept:%.6lf}", param02, param12);
snprintf(varDataVal(buf), sizeof(buf) - VARSTR_HEADER_SIZE, "{slop:%s, intercept:%s}", slopBuf, interceptBuf);
varDataSetLen(buf, len);
colDataSetVal(pCol, currentRow, buf, pResInfo->isNullRes);

16
source/libs/scalar/src/sclfunc.c
View File

@ -2427,9 +2427,19 @@ int32_t leastSQRScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarPa
matrix12 /= matrix[1][1];
char buf[64] = {0};
size_t len = snprintf(varDataVal(buf), sizeof(buf) - VARSTR_HEADER_SIZE, "{slop:%.6lf, intercept:%.6lf}", matrix02,
matrix12);
char buf[LEASTSQUARES_BUFF_LENGTH] = {0};
char slopBuf[64] = {0};
char interceptBuf[64] = {0};
int n = snprintf(slopBuf, 64, "%.6lf", matrix02);
if (n > LEASTSQUARES_DOUBLE_ITEM_LENGTH) {
snprintf(slopBuf, 64, "%." DOUBLE_PRECISION_DIGITS, matrix02);
}
n = snprintf(interceptBuf, 64, "%.6lf", matrix12);
if (n > LEASTSQUARES_DOUBLE_ITEM_LENGTH) {
snprintf(interceptBuf, 64, "%." DOUBLE_PRECISION_DIGITS, matrix12);
}
size_t len =
snprintf(varDataVal(buf), sizeof(buf) - VARSTR_HEADER_SIZE, "{slop:%s, intercept:%s}", slopBuf, interceptBuf);
varDataSetLen(buf, len);
colDataSetVal(pOutputData, 0, buf, false);
}