tminmax.c

/*
 * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
 *
 * This program is free software: you can use, redistribute, and/or modify
 * it under the terms of the GNU Affero General Public License, version 3
 * or later ("AGPL"), as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include "builtinsimpl.h"
#include "function.h"
#include "tdatablock.h"
#include "tfunctionInt.h"
#include "tglobal.h"

#define __COMPARE_ACQUIRED_MAX(i, end, bm, _data, ctx, val, pos) \
  for (; i < (end); ++i) {                                       \
    if (colDataIsNull_f(bm, i)) {                                \
      continue;                                                  \
    }                                                            \
                                                                 \
    if ((val) < (_data)[i]) {                                    \
      (val) = (_data)[i];                                        \
      if ((ctx)->subsidiaries.num > 0) {                         \
        updateTupleData((ctx), i, (ctx)->pSrcBlock, pos);        \
      }                                                          \
    }                                                            \
  }

#define __COMPARE_ACQUIRED_MIN(i, end, bm, _data, ctx, val, pos) \
  for (; i < (end); ++i) {                                       \
    if (colDataIsNull_f(bm, i)) {                                \
      continue;                                                  \
    }                                                            \
                                                                 \
    if ((val) > (_data)[i]) {                                    \
      (val) = (_data)[i];                                        \
      if ((ctx)->subsidiaries.num > 0) {                         \
        updateTupleData((ctx), i, (ctx)->pSrcBlock, pos);        \
      }                                                          \
    }                                                            \
  }

#define __COMPARE_EXTRACT_MIN(start, end, val, _data) \
  for (int32_t i = (start); i < (end); ++i) {         \
    if ((val) > (_data)[i]) {                         \
      (val) = (_data)[i];                             \
    }                                                 \
  }

#define __COMPARE_EXTRACT_MAX(start, end, val, _data) \
  for (int32_t i = (start); i < (end); ++i) {         \
    if ((val) < (_data)[i]) {                         \
      (val) = (_data)[i];                             \
    }                                                 \
  }

static void calculateRounds(int32_t numOfRows, int32_t bytes, int32_t* remainder, int32_t* rounds, int32_t* width) {
  const int32_t bitWidth = 256;

  *width = (bitWidth>>3u) / bytes;
  *remainder = numOfRows % (*width);
  *rounds = numOfRows / (*width);
}

#define EXTRACT_MAX_VAL(_first, _sec, _width, _remain, _v) \
  (_v) = TMAX((_first)[0], (_first)[1]);                   \
  for (int32_t k = 1; k < (_width); ++k) {                 \
    (_v) = TMAX((_v), (_first)[k]);                        \
  }                                                        \
                                                           \
  for (int32_t j = 0; j < (_remain); ++j) {                \
    if ((_v) < (_sec)[j]) {                                \
      (_v) = (_sec)[j];                                    \
    }                                                      \
  }

#define EXTRACT_MIN_VAL(_first, _sec, _width, _remain, _v) \
  (_v) = TMIN((_first)[0], (_first)[1]);                   \
  for (int32_t k = 1; k < (_width); ++k) {                 \
    (_v) = TMIN((_v), (_first)[k]);                        \
  }                                                        \
                                                           \
  for (int32_t j = 0; j < (_remain); ++j) {                \
    if ((_v) > (_sec)[j]) {                                \
      (_v) = (_sec)[j];                                    \
    }                                                      \
  }
  
  
static int8_t i8VectorCmpAVX2(const void* pData, int32_t numOfRows, bool isMinFunc, bool signVal) {
  int8_t        v = 0;
  const int8_t* p = pData;

  int32_t width, remain, rounds;
  calculateRounds(numOfRows, sizeof(int8_t), &remain, &rounds, &width);

#if __AVX2__
  __m256i next;
  __m256i initVal = _mm256_lddqu_si256((__m256i*)p);
  p += width;

  if (!isMinFunc) {  // max function
    if (signVal) {
      for (int32_t i = 0; i < rounds; ++i) {
        next = _mm256_lddqu_si256((__m256i*)p);
        initVal = _mm256_max_epi8(initVal, next);
        p += width;
      }

      const int8_t* q = (const int8_t*)&initVal;
      EXTRACT_MAX_VAL(q, p, width, remain, v)
    } else {  // unsigned value 
      for (int32_t i = 0; i < rounds; ++i) {
        next = _mm256_lddqu_si256((__m256i*)p);
        initVal = _mm256_max_epu8(initVal, next);
        p += width;
      }

      const uint8_t* q = (const uint8_t*)&initVal;
      EXTRACT_MAX_VAL(q, p, width, remain, v)
    }
    
  } else {  // min function
    if (signVal) {
      for (int32_t i = 0; i < rounds; ++i) {
        next = _mm256_lddqu_si256((__m256i*)p);
        initVal = _mm256_min_epi8(initVal, next);
        p += width;
      }

      // let sum up the final results
      const int8_t* q = (const int8_t*)&initVal;
      EXTRACT_MIN_VAL(q, p, width, remain, v)
    } else {
      for (int32_t i = 0; i < rounds; ++i) {
        next = _mm256_lddqu_si256((__m256i*)p);
        initVal = _mm256_min_epu8(initVal, next);
        p += width;
      }

      // let sum up the final results
      const uint8_t* q = (const uint8_t*)&initVal;
      EXTRACT_MIN_VAL(q, p, width, remain, v)
    }
  }
#endif

  return v;
}

static int16_t i16VectorCmpAVX2(const int16_t* pData, int32_t numOfRows, bool isMinFunc, bool signVal) {
  int16_t        v = 0;
  const int16_t* p = pData;

  int32_t width, remain, rounds;
  calculateRounds(numOfRows, sizeof(int16_t), &remain, &rounds, &width);

#if __AVX2__
  __m256i next;
  __m256i initVal = _mm256_lddqu_si256((__m256i*)p);
  p += width;

  if (!isMinFunc) {  // max function
    if (signVal) {
      for (int32_t i = 0; i < rounds; ++i) {
        next = _mm256_lddqu_si256((__m256i*)p);
        initVal = _mm256_max_epi16(initVal, next);
        p += width;
      }

      // let sum up the final results
      const int16_t* q = (const int16_t*)&initVal;
      EXTRACT_MAX_VAL(q, p, width, remain, v)
    } else {
      for (int32_t i = 0; i < rounds; ++i) {
        next = _mm256_lddqu_si256((__m256i*)p);
        initVal = _mm256_max_epu16(initVal, next);
        p += width;
      }

      // let sum up the final results
      const uint16_t* q = (const uint16_t*)&initVal;
      EXTRACT_MAX_VAL(q, p, width, remain, v)
    }

  } else {  // min function
    if (signVal) {
      for (int32_t i = 0; i < rounds; ++i) {
        next = _mm256_lddqu_si256((__m256i*)p);
        initVal = _mm256_min_epi16(initVal, next);
        p += width;
      }

      // let sum up the final results
      const int16_t* q = (const int16_t*)&initVal;
      EXTRACT_MIN_VAL(q, p, width, remain, v)
    } else {
      for (int32_t i = 0; i < rounds; ++i) {
        next = _mm256_lddqu_si256((__m256i*)p);
        initVal = _mm256_min_epi16(initVal, next);
        p += width;
      }

      // let sum up the final results
      const uint16_t* q = (const uint16_t*)&initVal;
      EXTRACT_MIN_VAL(q, p, width, remain, v)
    }
  }
#endif

  return v;
}

static int32_t i32VectorCmpAVX2(const int32_t* pData, int32_t numOfRows, bool isMinFunc, bool signVal) {
  int32_t        v = 0;
  const int32_t* p = pData;

  int32_t width, remain, rounds;
  calculateRounds(numOfRows, sizeof(int32_t), &remain, &rounds, &width);

#if __AVX2__
  __m256i next;
  __m256i initVal = _mm256_lddqu_si256((__m256i*)p);
  p += width;

  if (!isMinFunc) {  // max function
    if (signVal) {
      for (int32_t i = 0; i < rounds; ++i) {
        next = _mm256_lddqu_si256((__m256i*)p);
        initVal = _mm256_max_epi32(initVal, next);
        p += width;
      }

      // let compare  the final results
      const int32_t* q = (const int32_t*)&initVal;
      EXTRACT_MAX_VAL(q, p, width, remain, v)
    } else { // unsigned value
      for (int32_t i = 0; i < rounds; ++i) {
        next = _mm256_lddqu_si256((__m256i*)p);
        initVal = _mm256_max_epi32(initVal, next);
        p += width;
      }

      // let compare  the final results
      const uint32_t* q = (const uint32_t*)&initVal;
      EXTRACT_MAX_VAL(q, p, width, remain, v)
    }
  } else {  // min function
    if (signVal) {
      for (int32_t i = 0; i < rounds; ++i) {
        next = _mm256_lddqu_si256((__m256i*)p);
        initVal = _mm256_min_epi32(initVal, next);
        p += width;
      }

      // let sum up the final results
      const int32_t* q = (const int32_t*)&initVal;
      EXTRACT_MIN_VAL(q, p, width, remain, v)
    } else {
      for (int32_t i = 0; i < rounds; ++i) {
        next = _mm256_lddqu_si256((__m256i*)p);
        initVal = _mm256_min_epu32(initVal, next);
        p += width;
      }

      // let sum up the final results
      const uint32_t* q = (const uint32_t*)&initVal;
      EXTRACT_MIN_VAL(q, p, width, remain, v)
    }
  }
#endif

  return v;
}

static float floatVectorCmpAVX(const float* pData, int32_t numOfRows, bool isMinFunc) {
  float v = 0;
  const float* p = pData;

  int32_t width, remain, rounds;
  calculateRounds(numOfRows, sizeof(float), &remain, &rounds, &width);

#if __AVX__

  __m256 next;
  __m256 initVal = _mm256_loadu_ps(p);
  p += width;

  if (!isMinFunc) {  // max function
    for (int32_t i = 1; i < rounds; ++i) {
      next = _mm256_loadu_ps(p);
      initVal = _mm256_max_ps(initVal, next);
      p += width;
    }

    const float* q = (const float*)&initVal;
    EXTRACT_MAX_VAL(q, p, width, remain, v)
  } else {  // min function
    for (int32_t i = 1; i < rounds; ++i) {
      next = _mm256_loadu_ps(p);
      initVal = _mm256_min_ps(initVal, next);
      p += width;
    }

    const float* q = (const float*)&initVal;
    EXTRACT_MIN_VAL(q, p, width, remain, v)
  }
#endif

  return v;
}

static double doubleVectorCmpAVX(const double* pData, int32_t numOfRows, bool isMinFunc) {
  double        v = 0;
  const double* p = pData;

  int32_t width, remain, rounds;
  calculateRounds(numOfRows, sizeof(double), &remain, &rounds, &width);

#if __AVX__

  __m256d next;
  __m256d initVal = _mm256_loadu_pd(p);
  p += width;

  if (!isMinFunc) {  // max function
    for (int32_t i = 1; i < rounds; ++i) {
      next = _mm256_loadu_pd(p);
      initVal = _mm256_max_pd(initVal, next);
      p += width;
    }

    // let sum up the final results
    const double* q = (const double*)&initVal;
    EXTRACT_MAX_VAL(q, p, width, remain, v)
  } else {  // min function
    for (int32_t i = 1; i < rounds; ++i) {
      next = _mm256_loadu_pd(p);
      initVal = _mm256_min_pd(initVal, next);
      p += width;
    }

    // let sum up the final results
    const double* q = (const double*)&initVal;
    EXTRACT_MIN_VAL(q, p, width, remain, v)
  }
#endif

  return v;
}

static int32_t findFirstValPosition(const SColumnInfoData* pCol, int32_t start, int32_t numOfRows) {
  int32_t i = start;
  
  while (i < (start + numOfRows) && (colDataIsNull_f(pCol->nullbitmap, i) == true)) {
    i += 1;
  }

  return i;
}

static void handleInt8Col(const void* data, int32_t start, int32_t numOfRows, SMinmaxResInfo* pBuf, bool isMinFunc,
                          bool signVal) {
  // AVX2 version to speedup the loop
  if (tsAVX2Enable && tsSIMDEnable) {
    pBuf->v = i8VectorCmpAVX2(data, numOfRows, isMinFunc, signVal);
  } else {
    if (!pBuf->assign) {
      pBuf->v = ((int8_t*)data)[0];
    }

    if (signVal) {
      const int8_t* p = (const int8_t*)data;
      int8_t*       v = (int8_t*)&pBuf->v;

      if (isMinFunc) {
        __COMPARE_EXTRACT_MIN(start, start + numOfRows, *v, p);
      } else {
        __COMPARE_EXTRACT_MAX(start, start + numOfRows, *v, p);
      }
    } else {
      const uint8_t* p = (const uint8_t*)data;
      uint8_t*       v = (uint8_t*)&pBuf->v;

      if (isMinFunc) {
        __COMPARE_EXTRACT_MIN(start, start + numOfRows, *v, p);
      } else {
        __COMPARE_EXTRACT_MAX(start, start + numOfRows, *v, p);
      }
    }
  }

  pBuf->assign = true;
}

static void handleInt16Col(const void* data, int32_t start, int32_t numOfRows, SMinmaxResInfo* pBuf, bool isMinFunc,
                           bool signVal) {
  // AVX2 version to speedup the loop
  if (tsAVX2Enable && tsSIMDEnable) {
    pBuf->v = i16VectorCmpAVX2(data, numOfRows, isMinFunc, signVal);
  } else {
    if (!pBuf->assign) {
      pBuf->v = ((int16_t*)data)[0];
    }

    if (signVal) {
      const int16_t* p = (const int16_t*)data;
      int16_t*       v = (int16_t*)&pBuf->v;

      if (isMinFunc) {
        __COMPARE_EXTRACT_MIN(start, start + numOfRows, *v, p);
      } else {
        __COMPARE_EXTRACT_MAX(start, start + numOfRows, *v, p);
      }
    } else {
      const uint16_t* p = (const uint16_t*)data;
      uint16_t*       v = (uint16_t*)&pBuf->v;

      if (isMinFunc) {
        __COMPARE_EXTRACT_MIN(start, start + numOfRows, *v, p);
      } else {
        __COMPARE_EXTRACT_MAX(start, start + numOfRows, *v, p);
      }
    }
  }

  pBuf->assign = true;
}

static void handleInt32Col(const void* data, int32_t start, int32_t numOfRows, SMinmaxResInfo* pBuf, bool isMinFunc,
                           bool signVal) {
  // AVX2 version to speedup the loop
  if (tsAVX2Enable && tsSIMDEnable) {
    pBuf->v = i32VectorCmpAVX2(data, numOfRows, isMinFunc, signVal);
  } else {
    if (!pBuf->assign) {
      pBuf->v = ((int32_t*)data)[0];
    }

    if (signVal) {
      const int32_t* p = (const int32_t*)data;
      int32_t*       v = (int32_t*)&pBuf->v;

      if (isMinFunc) {
        __COMPARE_EXTRACT_MIN(start, start + numOfRows, *v, p);
      } else {
        __COMPARE_EXTRACT_MAX(start, start + numOfRows, *v, p);
      }
    } else {
      const uint32_t* p = (const uint32_t*)data;
      uint32_t*       v = (uint32_t*)&pBuf->v;

      if (isMinFunc) {
        __COMPARE_EXTRACT_MIN(start, start + numOfRows, *v, p);
      } else {
        __COMPARE_EXTRACT_MAX(start, start + numOfRows, *v, p);
      }
    }
  }

  pBuf->assign = true;
}

static void handleInt64Col(const void* data, int32_t start, int32_t numOfRows, SMinmaxResInfo* pBuf, bool isMinFunc,
                           bool signVal) {
  if (!pBuf->assign) {
    pBuf->v = ((int64_t*)data)[0];
  }

  if (signVal) {
    const int64_t* p = (const int64_t*)data;
    int64_t*       v = &pBuf->v;

    if (isMinFunc) {
      __COMPARE_EXTRACT_MIN(start, start + numOfRows, *v, p);
    } else {
      __COMPARE_EXTRACT_MAX(start, start + numOfRows, *v, p);
    }
  } else {
    const uint64_t* p = (const uint64_t*)data;
    uint64_t*       v = (uint64_t*)&pBuf->v;

    if (isMinFunc) {
      __COMPARE_EXTRACT_MIN(start, start + numOfRows, *v, p);
    } else {
      __COMPARE_EXTRACT_MAX(start, start + numOfRows, *v, p);
    }
  }
}

static void handleUint8Col(SColumnInfoData* pCol, int32_t start, int32_t numOfRows, SMinmaxResInfo* pBuf,
                           bool isMinFunc) {
  const uint8_t* pData = (uint8_t*)pCol->pData;
  uint8_t* val = (uint8_t*)&pBuf->v;

  // AVX2 version to speedup the loop
  if (tsAVX2Enable && tsSIMDEnable) {
    *val = i8VectorCmpAVX2(pData, numOfRows, isMinFunc, false);
  } else {
    if (!pBuf->assign) {
      *val = pData[0];
    }

    if (isMinFunc) {  // min
      __COMPARE_EXTRACT_MIN(start, start + numOfRows, *val, pData);
    } else {
      __COMPARE_EXTRACT_MAX(start, start + numOfRows, *val, pData);
    }
  }

  pBuf->assign = true;
}

static void handleFloatCol(SColumnInfoData* pCol, int32_t start, int32_t numOfRows, SMinmaxResInfo* pBuf, bool isMinFunc) {
  float* pData = (float*)pCol->pData;
  float* val = (float*)&pBuf->v;

  // AVX version to speedup the loop
  if (tsAVXEnable && tsSIMDEnable) {
    *val = floatVectorCmpAVX(pData, numOfRows, isMinFunc);
  } else {
    if (!pBuf->assign) {
      *val = pData[0];
    }

    if (isMinFunc) {  // min
      for (int32_t i = start; i < start + numOfRows; ++i) {
        if (*val > pData[i]) {
          *val = pData[i];
        }
      }
    } else {  // max
      for (int32_t i = start; i < start + numOfRows; ++i) {
        if (*val < pData[i]) {
          *val = pData[i];
        }
      }
    }
  }

  pBuf->assign = true;
}

static void handleDoubleCol(SColumnInfoData* pCol, int32_t start, int32_t numOfRows, SMinmaxResInfo* pBuf, bool isMinFunc) {
  double* pData = (double*)pCol->pData;
  double* val = (double*)&pBuf->v;

  // AVX version to speedup the loop
  if (tsAVXEnable && tsSIMDEnable) {
    *val = (double)doubleVectorCmpAVX(pData, numOfRows, isMinFunc);
  } else {
    if (!pBuf->assign) {
      *val = pData[0];
    }

    if (isMinFunc) {  // min
      for (int32_t i = start; i < start + numOfRows; ++i) {
        if (*val > pData[i]) {
          *val = pData[i];
        }
      }
    } else {  // max
      for (int32_t i = start; i < start + numOfRows; ++i) {
        if (*val < pData[i]) {
          *val = pData[i];
        }
      }
    }
  }

  pBuf->assign = true;
}

static int32_t findRowIndex(int32_t start, int32_t num, SColumnInfoData* pCol, const char* tval) {
  // the data is loaded, not only the block SMA value
  for (int32_t i = start; i < num + start; ++i) {
    char* p = colDataGetData(pCol, i);
    if (memcmp((void*)tval, p, pCol->info.bytes) == 0) {
      return i;
    }
  }

  // if reach here means real data of block SMA is not set in pCtx->input.
  return -1;
}

static void doExtractVal(SColumnInfoData* pCol, int32_t i, int32_t end, SqlFunctionCtx* pCtx, SMinmaxResInfo* pBuf,
                         bool isMinFunc) {
  if (isMinFunc) {
    switch (pCol->info.type) {
      case TSDB_DATA_TYPE_BOOL:
      case TSDB_DATA_TYPE_TINYINT: {
        const int8_t* pData = (const int8_t*)pCol->pData;
        __COMPARE_ACQUIRED_MIN(i, end, pCol->nullbitmap, pData, pCtx, *(int8_t*)&(pBuf->v), &pBuf->tuplePos)
        break;
      }

      case TSDB_DATA_TYPE_SMALLINT: {
        const int16_t* pData = (const int16_t*)pCol->pData;
        __COMPARE_ACQUIRED_MIN(i, end, pCol->nullbitmap, pData, pCtx, *(int16_t*)&(pBuf->v), &pBuf->tuplePos)
        break;
      }

      case TSDB_DATA_TYPE_INT: {
        const int32_t* pData = (const int32_t*)pCol->pData;
        __COMPARE_ACQUIRED_MIN(i, end, pCol->nullbitmap, pData, pCtx, *(int32_t*)&(pBuf->v), &pBuf->tuplePos)
        break;
      }

      case TSDB_DATA_TYPE_BIGINT: {
        const int64_t* pData = (const int64_t*)pCol->pData;
        __COMPARE_ACQUIRED_MIN(i, end, pCol->nullbitmap, pData, pCtx, (pBuf->v), &pBuf->tuplePos)
        break;
      }

      case TSDB_DATA_TYPE_UTINYINT: {
        const uint8_t* pData = (const uint8_t*)pCol->pData;
        __COMPARE_ACQUIRED_MIN(i, end, pCol->nullbitmap, pData, pCtx, *(uint8_t*)&(pBuf->v), &pBuf->tuplePos)
        break;
      }

      case TSDB_DATA_TYPE_USMALLINT: {
        const uint16_t* pData = (const uint16_t*)pCol->pData;
        __COMPARE_ACQUIRED_MIN(i, end, pCol->nullbitmap, pData, pCtx, *(uint16_t*)&(pBuf->v), &pBuf->tuplePos)
        break;
      }

      case TSDB_DATA_TYPE_UINT: {
        const uint32_t* pData = (const uint32_t*)pCol->pData;
        __COMPARE_ACQUIRED_MIN(i, end, pCol->nullbitmap, pData, pCtx, *(uint32_t*)&(pBuf->v), &pBuf->tuplePos)
        break;
      }

      case TSDB_DATA_TYPE_UBIGINT: {
        const uint64_t* pData = (const uint64_t*)pCol->pData;
        __COMPARE_ACQUIRED_MIN(i, end, pCol->nullbitmap, pData, pCtx, *(uint64_t*)&(pBuf->v), &pBuf->tuplePos)
        break;
      }

      case TSDB_DATA_TYPE_FLOAT: {
        const float* pData = (const float*)pCol->pData;
        __COMPARE_ACQUIRED_MIN(i, end, pCol->nullbitmap, pData, pCtx, *(float*)&(pBuf->v), &pBuf->tuplePos)
        break;
      }

      case TSDB_DATA_TYPE_DOUBLE: {
        const double* pData = (const double*)pCol->pData;
        __COMPARE_ACQUIRED_MIN(i, end, pCol->nullbitmap, pData, pCtx, *(double*)&(pBuf->v), &pBuf->tuplePos)
        break;
      }
    }
  } else {
    switch (pCol->info.type) {
      case TSDB_DATA_TYPE_BOOL:
      case TSDB_DATA_TYPE_TINYINT: {
        const int8_t* pData = (const int8_t*)pCol->pData;
        __COMPARE_ACQUIRED_MAX(i, end, pCol->nullbitmap, pData, pCtx, *(int8_t*)&(pBuf->v), &pBuf->tuplePos)
        break;
      }

      case TSDB_DATA_TYPE_SMALLINT: {
        const int16_t* pData = (const int16_t*)pCol->pData;
        __COMPARE_ACQUIRED_MAX(i, end, pCol->nullbitmap, pData, pCtx, *(int16_t*)&(pBuf->v), &pBuf->tuplePos)
        break;
      }

      case TSDB_DATA_TYPE_INT: {
        const int16_t* pData = (const int16_t*)pCol->pData;
        __COMPARE_ACQUIRED_MAX(i, end, pCol->nullbitmap, pData, pCtx, *(int32_t*)&(pBuf->v), &pBuf->tuplePos)
        break;
      }

      case TSDB_DATA_TYPE_BIGINT: {
        const int64_t* pData = (const int64_t*)pCol->pData;
        __COMPARE_ACQUIRED_MAX(i, end, pCol->nullbitmap, pData, pCtx, (pBuf->v), &pBuf->tuplePos)
        break;
      }

      case TSDB_DATA_TYPE_UTINYINT: {
        const uint8_t* pData = (const uint8_t*)pCol->pData;
        __COMPARE_ACQUIRED_MAX(i, end, pCol->nullbitmap, pData, pCtx, *(uint8_t*)&(pBuf->v), &pBuf->tuplePos)
        break;
      }

      case TSDB_DATA_TYPE_USMALLINT: {
        const uint16_t* pData = (const uint16_t*)pCol->pData;
        __COMPARE_ACQUIRED_MAX(i, end, pCol->nullbitmap, pData, pCtx, *(uint16_t*)&(pBuf->v), &pBuf->tuplePos)
        break;
      }

      case TSDB_DATA_TYPE_UINT: {
        const uint32_t* pData = (const uint32_t*)pCol->pData;
        __COMPARE_ACQUIRED_MAX(i, end, pCol->nullbitmap, pData, pCtx, *(uint32_t*)&(pBuf->v), &pBuf->tuplePos)
        break;
      }

      case TSDB_DATA_TYPE_UBIGINT: {
        const uint64_t* pData = (const uint64_t*)pCol->pData;
        __COMPARE_ACQUIRED_MAX(i, end, pCol->nullbitmap, pData, pCtx, *(uint64_t*)&(pBuf->v), &pBuf->tuplePos)
        break;
      }

      case TSDB_DATA_TYPE_FLOAT: {
        const float* pData = (const float*)pCol->pData;
        __COMPARE_ACQUIRED_MAX(i, end, pCol->nullbitmap, pData, pCtx, *(float*)&(pBuf->v), &pBuf->tuplePos)
        break;
      }

      case TSDB_DATA_TYPE_DOUBLE: {
        const double* pData = (const double*)pCol->pData;
        __COMPARE_ACQUIRED_MAX(i, end, pCol->nullbitmap, pData, pCtx, *(double*)&(pBuf->v), &pBuf->tuplePos)
        break;
      }
    }
  }
}

int32_t doMinMaxHelper(SqlFunctionCtx* pCtx, int32_t isMinFunc) {
  int32_t numOfElems = 0;

  SInputColumnInfoData* pInput = &pCtx->input;
  SColumnDataAgg*       pAgg = pInput->pColumnDataAgg[0];

  SColumnInfoData* pCol = pInput->pData[0];
  int32_t          type = pCol->info.type;

  SResultRowEntryInfo* pResInfo = GET_RES_INFO(pCtx);
  SMinmaxResInfo*      pBuf = GET_ROWCELL_INTERBUF(pResInfo);
  pBuf->type = type;

  if (IS_NULL_TYPE(type)) {
    numOfElems = 0;
    goto _over;
  }

  // data in current data block are qualified to the query
  if (pInput->colDataSMAIsSet) {
    numOfElems = pInput->numOfRows - pAgg->numOfNull;
    ASSERT(pInput->numOfRows == pInput->totalRows && numOfElems >= 0);

    if (numOfElems == 0) {
      return numOfElems;
    }

    void*   tval = NULL;
    int16_t index = 0;

    if (isMinFunc) {
      tval = &pInput->pColumnDataAgg[0]->min;
    } else {
      tval = &pInput->pColumnDataAgg[0]->max;
    }

    if (!pBuf->assign) {
      pBuf->v = *(int64_t*)tval;
      if (pCtx->subsidiaries.num > 0) {
        index = findRowIndex(pInput->startRowIndex, pInput->numOfRows, pCol, tval);
        if (index >= 0) {
          pBuf->tuplePos = saveTupleData(pCtx, index, pCtx->pSrcBlock, NULL);
        }
      }
    } else {
      if (IS_SIGNED_NUMERIC_TYPE(type)) {
        int64_t prev = 0;
        GET_TYPED_DATA(prev, int64_t, type, &pBuf->v);

        int64_t val = GET_INT64_VAL(tval);
        if ((prev < val) ^ isMinFunc) {
          *(int64_t*)&pBuf->v = val;
          if (pCtx->subsidiaries.num > 0) {
            index = findRowIndex(pInput->startRowIndex, pInput->numOfRows, pCol, tval);
            if (index >= 0) {
              pBuf->tuplePos = saveTupleData(pCtx, index, pCtx->pSrcBlock, NULL);
            }
          }
        }
      } else if (IS_UNSIGNED_NUMERIC_TYPE(type)) {
        uint64_t prev = 0;
        GET_TYPED_DATA(prev, uint64_t, type, &pBuf->v);

        uint64_t val = GET_UINT64_VAL(tval);
        if ((prev < val) ^ isMinFunc) {
          *(uint64_t*)&pBuf->v = val;
          if (pCtx->subsidiaries.num > 0) {
            index = findRowIndex(pInput->startRowIndex, pInput->numOfRows, pCol, tval);
            if (index >= 0) {
              pBuf->tuplePos = saveTupleData(pCtx, index, pCtx->pSrcBlock, NULL);
            }
          }
        }
      } else if (type == TSDB_DATA_TYPE_DOUBLE) {
        double prev = 0;
        GET_TYPED_DATA(prev, double, type, &pBuf->v);

        double val = GET_DOUBLE_VAL(tval);
        if ((prev < val) ^ isMinFunc) {
          *(double*)&pBuf->v = val;
          if (pCtx->subsidiaries.num > 0) {
            index = findRowIndex(pInput->startRowIndex, pInput->numOfRows, pCol, tval);
            if (index >= 0) {
              pBuf->tuplePos = saveTupleData(pCtx, index, pCtx->pSrcBlock, NULL);
            }
          }
        }
      } else if (type == TSDB_DATA_TYPE_FLOAT) {
        float prev = 0;
        GET_TYPED_DATA(prev, float, type, &pBuf->v);

        float val = GET_DOUBLE_VAL(tval);
        if ((prev < val) ^ isMinFunc) {
          *(float*)&pBuf->v = val;
        }

        if (pCtx->subsidiaries.num > 0) {
          index = findRowIndex(pInput->startRowIndex, pInput->numOfRows, pCol, tval);
          if (index >= 0) {
            pBuf->tuplePos = saveTupleData(pCtx, index, pCtx->pSrcBlock, NULL);
          }
        }
      }
    }

    pBuf->assign = true;
    return numOfElems;
  }

  int32_t start = pInput->startRowIndex;
  int32_t numOfRows = pInput->numOfRows;
  int32_t end = start + numOfRows;

  if (pCol->hasNull || numOfRows < 32 || pCtx->subsidiaries.num > 0) {
    int32_t i = findFirstValPosition(pCol, start, numOfRows);

    if ((i < end) && (!pBuf->assign)) {
      memcpy(&pBuf->v, pCol->pData + (pCol->info.bytes * i), pCol->info.bytes);

      if (pCtx->subsidiaries.num > 0) {
        pBuf->tuplePos = saveTupleData(pCtx, i, pCtx->pSrcBlock, NULL);
      }
      pBuf->assign = true;
      numOfElems = 1;
    }

    if (i >= end) {
      ASSERT(numOfElems == 0);
      return numOfElems;
    }

    doExtractVal(pCol, i, end, pCtx, pBuf, isMinFunc);
  } else {
    numOfElems = numOfRows;

    switch(pCol->info.type) {
      case TSDB_DATA_TYPE_BOOL:
      case TSDB_DATA_TYPE_TINYINT: {
        handleInt8Col(pCol->pData, start, numOfRows, pBuf, isMinFunc, true);
        break;
      }
      case TSDB_DATA_TYPE_SMALLINT: {
        handleInt16Col(pCol->pData, start, numOfRows, pBuf, isMinFunc, true);
        break;
      }
      case TSDB_DATA_TYPE_INT: {
        handleInt32Col(pCol->pData, start, numOfRows, pBuf, isMinFunc, true);
        break;
      }
      case TSDB_DATA_TYPE_BIGINT: {
        handleInt64Col(pCol->pData, start, numOfRows, pBuf, isMinFunc, true);
        break;
      }
      case TSDB_DATA_TYPE_UTINYINT: {
        handleInt8Col(pCol->pData, start, numOfRows, pBuf, isMinFunc, false);
        break;
      }
      case TSDB_DATA_TYPE_USMALLINT: {
        handleInt16Col(pCol->pData, start, numOfRows, pBuf, isMinFunc, false);
        break;
      }
      case TSDB_DATA_TYPE_UINT: {
        handleInt16Col(pCol->pData, start, numOfRows, pBuf, isMinFunc, false);
        break;
      }
      case TSDB_DATA_TYPE_UBIGINT: {
        handleInt16Col(pCol->pData, start, numOfRows, pBuf, isMinFunc, false);
        break;
      }
      case TSDB_DATA_TYPE_FLOAT: {
        handleFloatCol(pCol, start, numOfRows, pBuf, isMinFunc);
        break;
      }
      case TSDB_DATA_TYPE_DOUBLE: {
        handleDoubleCol(pCol, start, numOfRows, pBuf, isMinFunc);
        break;
      }
    }

  _over:
    if (numOfElems == 0 && pCtx->subsidiaries.num > 0 && !pBuf->nullTupleSaved) {
      pBuf->nullTuplePos = saveTupleData(pCtx, pInput->startRowIndex, pCtx->pSrcBlock, NULL);
      pBuf->nullTupleSaved = true;
    }
  }

  return numOfElems;
}