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ENH: add PostgreSQL support for pandas.io.sql.get_schema #4574

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ENH: add PostgreSQL support for pandas.io.sql.get_schema #4574

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e437783
add postgres support for pandas.io.sql.get_schema
adamgreenhall Aug 1, 2013
9e2eee7
Merge pull request #4677 from jreback/numeric2
jreback Aug 26, 2013
4642398
add postgres support for pandas.io.sql.get_schema
adamgreenhall Aug 1, 2013
e235836
Merge branch 'sql-additions' of github.com:adamgreenhall/pandas into …
adamgreenhall Aug 26, 2013
dcda0bc
add postgres support for pandas.io.sql.get_schema
adamgreenhall Aug 1, 2013
73a1994
Merge branch 'sql-additions' of github.com:adamgreenhall/pandas into …
adamgreenhall Aug 26, 2013
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14 changes: 12 additions & 2 deletions pandas/io/sql.py
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Original file line number Diff line number Diff line change
Expand Up @@ -267,28 +267,34 @@ def table_exists(name, con, flavor):

def get_sqltype(pytype, flavor):
sqltype = {'mysql': 'VARCHAR (63)',
'sqlite': 'TEXT'}
'sqlite': 'TEXT',
'postgres': 'text'}

if issubclass(pytype, np.floating):
sqltype['mysql'] = 'FLOAT'
sqltype['sqlite'] = 'REAL'
sqltype['postgres'] = 'real'

if issubclass(pytype, np.integer):
#TODO: Refine integer size.
sqltype['mysql'] = 'BIGINT'
sqltype['sqlite'] = 'INTEGER'
sqltype['postgres'] = 'integer'

if issubclass(pytype, np.datetime64) or pytype is datetime:
# Caution: np.datetime64 is also a subclass of np.number.
sqltype['mysql'] = 'DATETIME'
sqltype['sqlite'] = 'TIMESTAMP'
sqltype['postgres'] = 'timestamp'

if pytype is datetime.date:
sqltype['mysql'] = 'DATE'
sqltype['sqlite'] = 'TIMESTAMP'
sqltype['postgres'] = 'date'

if issubclass(pytype, np.bool_):
sqltype['sqlite'] = 'INTEGER'
sqltype['postgres'] = 'boolean'

return sqltype[flavor]

Expand All @@ -301,8 +307,12 @@ def get_schema(frame, name, flavor, keys=None):
column_types = lzip(safe_columns, map(lookup_type, frame.dtypes))
if flavor == 'sqlite':
columns = ',\n '.join('[%s] %s' % x for x in column_types)
else:
elif flavor == 'mysql':
columns = ',\n '.join('`%s` %s' % x for x in column_types)
elif flavor == 'postgres':
columns = ',\n '.join('%s %s' % x for x in column_types)
else:
raise ValueError("Don't have a template for that database flavor.")

keystr = ''
if keys is not None:
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