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[CH-199] Fix bug of "select cos(0)" returning no rows #200

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merged 1 commit into from
Nov 18, 2022
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[CH-199] Fix bug of "select cos(0)" returning no rows #200

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17 changes: 13 additions & 4 deletions utils/local-engine/Parser/SparkRowToCHColumn.h
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Original file line number Diff line number Diff line change
Expand Up @@ -91,14 +91,23 @@ class SparkRowToCHColumn
auto * rows_buf_ptr = static_cast<char*>(env->GetDirectBufferAddress(rows_buf));
int len = *(reinterpret_cast<int*>(rows_buf_ptr));

// when len = -1, reach the buf's end.
while (len > 0)
// len = -1 means reaching the buf's end.
while (len >= 0)
{
rows_buf_ptr += 4;
appendSparkRowToCHColumn(helper, rows_buf_ptr, len);
rows_buf_ptr += len;
len = *(reinterpret_cast<int*>(rows_buf_ptr));

if (len > 0)
{
rows_buf_ptr += len;
len = *(reinterpret_cast<int *>(rows_buf_ptr));
}
else
{
len = -1;
}
}

// Try to release reference.
env->DeleteLocalRef(rows_buf);
}
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