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@@ -106,7 +111,7 @@ Multi-table creation via ``append_to_multiple`` and selection via ``select_as_mu
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# indiviual tables were created
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store.select('df1_mt')
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store.select('df2_mt')
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# as a multiple
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store.select_as_multiple(['df1_mt','df2_mt'], where = [ 'A>0','B>0' ], selector = 'df1_mt')
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@@ -125,11 +130,31 @@ Multi-table creation via ``append_to_multiple`` and selection via ``select_as_mu
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- You can pass ``chunksize=an integer`` to ``append``, to change the writing chunksize (default is 50000). This will signficantly lower your memory usage on writing.
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- You can pass ``expectedrows=an integer`` to the first ``append``, to set the TOTAL number of expectedrows that ``PyTables`` will expected. This will optimize read/write performance.
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- ``Select`` now supports passing ``start`` and ``stop`` to provide selection space limiting in selection.
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- Greatly improved ISO8601 (e.g., yyyy-mm-dd) date parsing for file parsers (GH2698_)
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- Allow ``DataFrame.merge`` to handle combinatorial sizes too large for 64-bit integer (GH2690_)
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**Bug Fixes**
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- ``HDFStore`` tables can now store ``float32`` types correctly (cannot be mixed with ``float64`` however)
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- ``HDFStore`` tables can now store ``float32`` types correctly (cannot be
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mixed with ``float64`` however)
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- Fixed Google Analytics prefix when specifying request segment (GH2713_).
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- Function to reset Google Analytics token store so users can recover from
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improperly setup client secrets (GH2687_).
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- Fixed groupby bug resulting in segfault when passing in MultiIndex (GH2706_)
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- Fixed bug where passing a Series with datetime64 values into `to_datetime`
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results in bogus output values (GH2699_)
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- Fixed bug in ``pattern in HDFStore`` expressions when pattern is not a valid
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regex (GH2694_)
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- Fixed performance issues while aggregating boolean data (GH2692_)
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See the `full release notes
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<https://github.com/pydata/pandas/blob/master/RELEASE.rst>`__ or issue tracker
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