awswrangler.postgresql.to_sql

awswrangler.postgresql.to_sql(df: pandas.core.frame.DataFrame, con: pg8000.legacy.Connection, table: str, schema: str, mode: str = 'append', index: bool = False, dtype: Optional[Dict[str, str]] = None, varchar_lengths: Optional[Dict[str, int]] = None)None

Write records stored in a DataFrame into PostgreSQL.

Parameters
  • df (pandas.DataFrame) – Pandas DataFrame https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.html

  • con (pg8000.Connection) – Use pg8000.connect() to use credentials directly or wr.postgresql.connect() to fetch it from the Glue Catalog.

  • table (str) – Table name

  • schema (str) – Schema name

  • mode (str) – Append or overwrite.

  • index (bool) – True to store the DataFrame index as a column in the table, otherwise False to ignore it.

  • dtype (Dict[str, str], optional) – Dictionary of columns names and PostgreSQL types to be casted. Useful when you have columns with undetermined or mixed data types. (e.g. {‘col name’: ‘TEXT’, ‘col2 name’: ‘FLOAT’})

  • varchar_lengths (Dict[str, int], optional) – Dict of VARCHAR length by columns. (e.g. {“col1”: 10, “col5”: 200}).

Returns

None.

Return type

None

Examples

Writing to PostgreSQL using a Glue Catalog Connections

>>> import awswrangler as wr
>>> con = wr.postgresql.connect("MY_GLUE_CONNECTION")
>>> wr.postgresql.to_sql(
...     df=df,
...     table="my_table",
...     schema="public",
...     con=con
... )
>>> con.close()