jychen7 opened a new pull request #2139:
URL: https://github.com/apache/arrow-datafusion/pull/2139
# Which issue does this PR close?
Closes #2109
# Rationale for this change
Almost 100x slowdown on 0.7.0 with CSV file due to parsing entire file to
infer schema
# What changes are included in this PR?
set default to 1000 instead of None (unlimit) for csv and json's
schema_infer_max_rec
# Are there any user-facing changes?
NA
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