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If table exists, then append and replace do not work when adding a dataframe to a table #110

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zudevon opened this issue Apr 12, 2021 · 2 comments
Open

If table exists, then append and replace do not work when adding a dataframe to a table #110

zudevon opened this issue Apr 12, 2021 · 2 comments

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@zudevon
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zudevon commented Apr 12, 2021 •
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In the sqlalchemy clinet, when I try to replace or append a pandas dataframe to a table, if it exists, I get the error of the table already existing.

When I append I get this error:
ProgrammingError: (psycopg2.errors.DuplicateTable)

When I replace I get this error:
ProgrammingError: (psycopg2.errors.DuplicateTable)

The code is similar to: (both df's are in same format, and have same columns)

dataframe_to_table(df, table="my_table")
dataframe_to_table(df2, table="my_table", if_exists="replace")   # or if_exists="append"

The only solution I have had to work around this is to query the table, concatenate with the new dataframe, drop my table and then recreate it with just using the dataframe_to_table method

Is this method broken?
@alaukikharsh
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is this still an issue?

@zudevon
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zudevon commented Jan 21, 2022 via email

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@zudevon @alaukikharsh