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Make describe method work on other people's tables #15

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Make describe method work on other people's tables #15

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c630cdb
enable describing other tables belonging to other users
joezuntz Oct 30, 2014
ab6ab1e
Merge branch 'master' of https://github.com/joezuntz/desdb
joezuntz Oct 30, 2014
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17 changes: 14 additions & 3 deletions desdb/desdb.py
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Original file line number Diff line number Diff line change
Expand Up @@ -199,6 +199,13 @@ def describe(self, table, fmt='pretty', comments=False, show=False):
"""
# separate queries because the fgetmetadata is a slow
# function call
dots = table.count('.')
if dots==0:
owner=self.username
elif dots==1:
owner, table = table.split('.')
else:
raise ValueError("Invalid table name")
if not comments:
q="""
SELECT
Expand All @@ -208,9 +215,11 @@ def describe(self, table, fmt='pretty', comments=False, show=False):
CAST(data_precision as VARCHAR(9)) as precision,
CAST(data_scale as VARCHAR(5)) as scale
FROM
table(fgetmetadata)
all_tab_cols
WHERE
table_name = '{table}'
AND
owner = '{owner}'
ORDER BY
column_id
"""
Expand All @@ -225,13 +234,15 @@ def describe(self, table, fmt='pretty', comments=False, show=False):
data_scale as scale,
comments
FROM
table(fgetmetadata)
all_tab_cols
WHERE
table_name = '{table}'
AND
owner = '{owner}'
ORDER BY
column_id
"""
q=q.format(table=table.upper())
q=q.format(table=table.upper(), owner=owner.upper())

if show:
stderr.write(q)
Expand Down