Spaarsh opened a new pull request, #1041:
URL: https://github.com/apache/datafusion-python/pull/1041
…ncated outputs
# Which issue does this PR close?
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Closes #1026
# Rationale for this change
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Current implementation of ```_repr_``` and ```_html_repr_``` has no
indication for whether the output was truncated or not.
# What changes are included in this PR?
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The changes override the default output for the ```_repr_``` and
```_html_repr_``` functions and, instead, check if the table has more than 10
rows. If it does, then it prints the first 10 rows along with a ```... and
additional rows``` message.
A thing to note is that these changes flatten the batches of the dataframe
in the ```_repr_ function``` (as already done for the ```_repr_html_
function```). This was done primarily since using ```.collect``` twice was
causing major performance degradation. Batch flattening does this at 1/10 th of
the time.
# Are there any user-facing changes?
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The users shall now see the ```... and additional rows``` message along with
the first 10 rows if the table has more than 10 rows.
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