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Update 14-stream.md

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@ -147,27 +147,24 @@ In both of these methods, configuring the watermark is essential for obtaining a
## Supported functions
All [scalar functions](../function/#scalar-functions) are available in stream processing.
All System Information Functions are <b>not</b> available for stream processing.
All [aggregate and selection functions](../function/#system-information-functions) are available in stream processing, except following functions
- [leastsquares](../function/#leastsquares)
- [percentile](../function/#percentile)
- [top](../function/#leastsquares)
- [bottom](../function/#top)
- [elapsed](../function/#leastsquares)
- [interp](../function/#elapsed)
- [derivative](../function/#derivative)
- [irate](../function/#irate)
- [twa](../function/#twa)
- [histogram](../function/#histogram)
- [diff](../function/#diff)
- [statecount](../function/#statecount)
- [stateduration](../function/#stateduration)
- [csum](../function/#csum)
- [mavg](../function/#mavg)
- [sample](../function/#sample)
- [tail](../function/#tail)
- [unique](../function/#unique)
- [mode](../function/#mode)
All [scalar functions](../function/#scalar-functions) are available in stream processing. All [System Information Functions](../function/#system-information-functions) are <b>not</b> allowed in stream processing. All [Aggregate functions](function/#aggregate-functions) and [Selection functions](../function/#selection-functions) are available in stream processing, except the followings:
- [leastsquares](../function/#leastsquares)
- [percentile](../function/#percentile)
- [top](../function/#leastsquares)
- [bottom](../function/#top)
- [elapsed](../function/#leastsquares)
- [interp](../function/#elapsed)
- [derivative](../function/#derivative)
- [irate](../function/#irate)
- [twa](../function/#twa)
- [histogram](../function/#histogram)
- [diff](../function/#diff)
- [statecount](../function/#statecount)
- [stateduration](../function/#stateduration)
- [csum](../function/#csum)
- [mavg](../function/#mavg)
- [sample](../function/#sample)
- [tail](../function/#tail)
- [unique](../function/#unique)
- [mode](../function/#mode)