def browse_table(conn_params, get_data={}, post_data={}):
# initializations
sub_q_data = {'tbl': get_data.get('tbl'),'db':get_data.get('db')}
pg_index = get_data.get('pg', 1) # page 1 is the starting point
sub_q_data['limit'] = getattr(settings, 'TT_MAX_ROW_COUNT', 30) # 30 is the default row limit
# page 1 starts with offset 0 and so on
sub_q_data['offset'] = int(sub_q_data['limit']) * ( int(pg_index) - 1)
for item in ('schm', 'sort_key', 'sort_dir',):
if get_data.has_key(item): sub_q_data[item] = get_data.get(item)
# retrieve and run queries
keys = rpr_query(conn_params, 'primary_keys', sub_q_data)
count = sa.full_query(conn_params,
sql.generate_query('count_rows', conn_params['dialect'], sub_q_data)[0],
)['rows']
# get the table's row listing
r = sa.full_query(conn_params,
sql.generate_query('browse_table', conn_params['dialect'], sub_q_data)[0]
)
# format and return data
if type(r) == dict:
r.update({
'total_count': count[0][0],
'pg': pg_index,
'limit':sub_q_data['limit'],
'keys': keys
})
return r
else:
return fns.http_500(r)
def get_constraints(conn_params, query_type, get_data={}, form_data={}):
# first face the simple guy
if conn_params['dialect'] == 'mysql':
r = sa.full_query(conn_params,
sql.generate_query(query_type, conn_params['dialect'], get_data)[0])
return r
# this sequence of code would be repeated often
def get_cols_with_post_as_dict(get_data):
# query for column name associated with its ordinal position.
sql_stmt = sql.generate_query('column_assoc', conn_params['dialect'], get_data)[0]
cols_with_pos = sa.full_query(conn_params, sql_stmt)
# transform to dict for quick and easy indexing and retrieval
cols_with_pos = dict(cols_with_pos['rows'])
return cols_with_pos
# get raw constrainsts description
sql_stmt = sql.generate_query('constraints', conn_params['dialect'], get_data)[0]
con_desc = sa.full_query(conn_params, sql_stmt,);
# char to constraint type mapping as written in PostgreSQL documentation
char_constraint_map = {
'c': 'CHECK',
'f': 'FOREIGN KEY',
'p': 'PRIMARY KEY',
'u': 'UNIQUE',
}
columns = ['type', 'columns', 'description', 'name',]
rows = []
cols_with_pos = get_cols_with_post_as_dict(get_data)
for row in con_desc['rows']:
# contype 0, conname 1, conkey 2, confkey 3, relname 4, consrc 5
contype, conname, conkey, confkey, relname, consrc = row
# any contype not in the mapping above is not yet supported
if not char_constraint_map.has_key(contype): continue
desc = '' # starts empty
constrained_columns = ", ".join( [cols_with_pos[i] for i in conkey] )
type_ = char_constraint_map[contype]
# if this query is a foreign key translate the column names
if contype == 'c':
desc = consrc
if contype == 'f':
if relname != get_data.get('tbl'): # we need to get another columns with pos
get_data['tbl'] = relname
fr_cols_with_pos = get_cols_with_post_as_dict(get_data)
else: fr_cols_with_pos = cols_with_pos
referred_columns = [ fr_cols_with_pos[i] for i in confkey]
desc = relname + ":" + ", ".join(referred_columns)
# done
rows.append([ type_, constrained_columns, desc, conname])
return {'columns': columns, 'rows': rows, 'count': len(con_desc['rows'])}
def run_tbl_operations(conn_params, form_type, get_data={}, post_data={}):
# generate / derive queries to be run
queries, msg = [], ''
if form_type == 'tbl_edit_form':
queries, msg = sql.alter_table(conn_params['dialect'], get_data, post_data)
elif form_type == 'tbl_vacuum_form':
queries = sql.pg_vacuum_stmt(get_data, post_data)
else:
# implemented queries: analyze table and reindex table
# only the pg dialect
queries = sql.generate_query(form_type, conn_params['dialect'], get_data)
# execute queries and return formatted status messages
if form_type == 'tbl_edit_form':
ret = sa.short_query(conn_params, queries)
else: ret = sa.execute_outside_transaction(conn_params, queries)
if ret['status'] == 'success':
if form_type == 'tbl_edit_form': ret['msg'] = msg + ' change succesfull'
else:
msg = '{command} operation ran succesfully'
if form_type == 'tbl_vacuum_form': com = 'VACUUM'
elif form_type == 'analyze_table': com = 'ANALYZE'
elif form_type == 'reindex_table': com = 'REINDEX'
ret['msg'] = msg.format(command=com)
ret['msg'] = '<p class="query-msg {status}">{msg}</p>'.format(
status = 'error' if ret['status'] == 'error' else 'success',
msg = ret['msg']
)
return ret
def get_cols_with_post_as_dict(get_data):
# query for column name associated with its ordinal position.
sql_stmt = sql.generate_query('column_assoc', conn_params['dialect'], get_data)[0]
cols_with_pos = sa.full_query(conn_params, sql_stmt)
# transform to dict for quick and easy indexing and retrieval
cols_with_pos = dict(cols_with_pos['rows'])
return cols_with_pos
def get_dependencies(conn_params, get_data={}): # might later be extended for objects besides tables
'''
logic from pgadmin3
'''
# get the total listing of the dependent types
conn_params['db'] = get_data['db'] if get_data.has_key('db') else conn_params['db']
q_1 = sql.generate_query('pgadmin_deps', conn_params['dialect'], get_data)[0]
totl_deps = sa.full_query(conn_params, q_1)
# columns in totl_deps are u'deptype', u'classid', u'relkind', u'adbin', u'adsrc', u'type',
# u'ownertable', u'refname', u'nspname'
# raise Exception(totl_deps)
columns = ['type', 'name', 'restriction',]
tbl_data_rows = []
for row in totl_deps['rows']:
refname, typestr, depstr = '', '', ''
# get the type of this object described in this row
# type is the sixth column of this query
type_ = row[5]
if type_[0] in ('c', 's', 't'):
continue # ununderstood types: handled internally
elif type_[0] == 'i': typestr = 'index'
elif type_[0] == 'S': typestr = 'sequence'
elif type_[0] == 'v': typestr = 'view'
elif type_[0] == 'x': typestr = 'exttable'
elif type_[0] == 'p': typestr = 'function'
elif type_[0] == 'n': typestr = 'schema'
elif type_[0] == 'y': typestr = 'type'
elif type_[0] == 'T': typestr = 'trigger'
elif type_[0] == 'l': typestr = 'language'
elif type_[0] == 'R':
pass
elif type_[0] == 'C':
if type_[1] == 'c': typestr = 'check'
elif type_[1] == 'f':
refname = row[6] +'.'
typestr = 'foreign key'
elif type_[1] == 'u': typestr = 'unique'
elif type_[1] == 'p': typestr = 'primary key'
elif type_[1] == 'x': typestr = 'exclude'
elif type_[0] == 'A':
if row[3] != None and row[3].startswith("{FUNCEXPR"):
typestr = 'function'
refname = row[4] # adbin
# complete refname
# appends the name of the foreign key if the type of object is a foreign key
# function has the refname already set
refname = refname + row[7] # refname
# deptype is the first column of this query
deptype = row[0]
if deptype == 'i': depstr = 'internal'
elif deptype == 'a': depstr = 'auto'
elif deptype == 'n': depstr = 'normal'
elif deptype == 'p': depstr = 'pin'
tbl_data_rows.append([typestr, refname, depstr])
return {'count': totl_deps['count'], 'columns': columns,
'rows': tbl_data_rows
}
def browse_table(conn_params, get_data={}, post_data={}):
# initializations
sub_q_data = {'tbl': get_data.get('tbl'),'db':get_data.get('db')}
sub_q_data['offset'] = get_data.get('offset') if get_data.has_key('offset') else 0
sub_q_data['limit'] = get_data.get('limit') if get_data.has_key('limit') else getattr(settings, 'TT_MAX_ROW_COUNT', 100)
for item in ('schm', 'sort_key', 'sort_dir',):
if get_data.has_key(item): sub_q_data[item] = get_data.get(item)
# retrieve and run queries
keys = rpr_query(conn_params, 'primary_keys', sub_q_data)
count = sa.full_query(conn_params,
sql.generate_query('count_rows', conn_params['dialect'], sub_q_data)[0],
)['rows']
# get the table's row listing
r = sa.full_query(conn_params,
sql.generate_query('browse_table', conn_params['dialect'], sub_q_data)[0]
)
# format and return data
if type(r) == dict:
r.update({'total_count': count[0][0], 'offset': sub_q_data['offset'],
'limit':sub_q_data['limit'], 'keys': keys})
return r
else:
return fns.http_500(r)
def rpr_query(conn_params, query_type, get_data={}, post_data={}):
'''
Run queries that have to be generated on the fly. Most queries depends on get_data,
while some few depends on post_data
get_data and post_data are gotten from request.GET and request.POST or form.cleaned_data
some functions in this file should have been (and previously have been) in this function. but
the contents of a function are not indexed by IDEs and that makes debugging difficult
'''
# common queries that returns success state as a dict only
no_return_queries = ('create_user', 'drop_user', 'create_db','create_table',
'drop_table', 'empty_table', 'delete_row', 'create_column', 'drop_column',
'drop_db', 'drop_sequence', 'reset_sequence', 'drop_constraint', )
psycopg2_queries = ('drop_db', )
if query_type in no_return_queries:
conn_params['db'] = get_data['db'] if get_data.has_key('db') else conn_params['db']
query_data = {}
query_data.update(get_data, **post_data)
queries = sql.generate_query( query_type, conn_params['dialect'],query_data)
if conn_params['dialect'] == 'postgresql' and query_type in psycopg2_queries:
# this queries needs to be run outside a transaction block
# SA execute functions runs all its queries inside a transaction block
result = sa.execute_outside_transaction(conn_params, queries)
else: result = sa.short_query(conn_params, queries)
return HttpResponse( json.dumps(result) )
# specific queries with implementations similar to both dialects
elif query_type in ('indexes', 'primary_keys', 'foreign_key_relation'):
if conn_params['dialect'] == 'postgresql' and query_type == 'indexes':
return get_constraints(conn_params, query_type, get_data)
r = sa.full_query(conn_params,
sql.generate_query(query_type, conn_params['dialect'], get_data)[0])
return r
elif query_type in ('get_single_row',):
sub_q_data = {'tbl': get_data['tbl'],'db':get_data['db']}
if get_data.has_key('schm'):
sub_q_data['schm'] = get_data['schm']
# generate where statement
sub_q_data['where'] = ""
for ind in range(len(post_data)):
sub_q_data['where'] += post_data.keys()[ind].strip() + "="
val = post_data.values()[ind].strip()
sub_q_data['where'] += fns.quote(val)
if ind != len(post_data) - 1: sub_q_data['where'] += ' AND '
# retrieve and run queries
conn_params['db'] = get_data['db']
# assert False
q = sql.generate_query(query_type, conn_params['dialect'], sub_q_data)
r = sa.full_query(conn_params, q[0])
return r
elif query_type in ('table_rpr', 'table_structure', 'raw_table_structure', 'seqs_rpr'):
sub_q_data = {'db': get_data['db'],}
if get_data.has_key('tbl'):
sub_q_data['tbl'] = get_data['tbl']
if get_data.has_key('schm'):
sub_q_data['schm'] = get_data['schm']
# make query
if conn_params['dialect'] == 'postgresql' and query_type == 'raw_table_structure':
q = 'table_structure'
else: q = query_type
r = sa.full_query(conn_params,
sql.generate_query(q, conn_params['dialect'], sub_q_data)[0] )
# further needed processing
if conn_params['dialect'] == 'postgresql' and query_type.count('table_structure'):
rwz = []
for tuple_row in r['rows']:
row = list(tuple_row)
data_type_str = row[1]
_l = [ data_type_str ]
datetime_precision = row[7]
if data_type_str in ('bit', 'bit varying', 'character varying', 'character') and type(row[4]) is int:
_l.append( '({0})'.format(row[4]) )
# elif data_type_str in ('numeric', 'decimal') and type(row[5]) is int or type(row[6]) is int:
elif data_type_str in ('numeric', 'decimal'):
numeric_precision, numeric_scale = row[5], row[6]
_l.append( '(%d,%d)' % (numeric_precision, numeric_scale) )
# interval types should need some revising
elif data_type_str in ('interval', ):
_l.append( '(%d)' % datetime_precision )
# time and timestamps have a somewhat different declarative syntax
elif datetime_precision is int and (data_type_str.startswith('time') or data_type_str.startswith('timestamp')):
_in = 9 if data_type_str.startswith('timestamp') else 4 # the length of time and timestamp respectively
_l = [ data_type_str[:_in], '(%d)' % datetime_precision , data_type_str[_in:]]
# append the current row to rwz
if query_type == 'table_structure': rwz.append([row[0], "".join(_l), row[2], row[3] ])
elif query_type == 'raw_table_structure':
row.append("".join(_l))
rwz.append(row)
# change r['rows']
r['rows'] = rwz
# change r['columns']
if query_type == 'table_structure':
r['columns'] = [ r['columns'][0], r['columns'][1], r['columns'][2], r['columns'][3] ]
elif query_type == 'raw_table_structure': r['columns'].append('column_type')
return r
# queries with dissimilar implementations
elif conn_params['dialect'] == 'mysql':
if query_type == 'describe_databases':
conn_params['db'] = 'INFORMATION_SCHEMA';
query = sql.stored_query(query_type, conn_params['dialect'])
return sa.full_query(conn_params, query)
else:
return fns.http_500('query not yet implemented!')
else:
return fns.http_500('dialect not supported!')
def rpr_query(conn_params, query_type, get_data={}, post_data={}):
'''
Run queries that have to be generated on the fly. Most queries depends on get_data,
while some few depends on post_data
get_data and post_data are gotten from request.GET and request.POST or form.cleaned_data
'''
# common queries that returns success state as a dict only
no_return_queries = ('create_user', 'drop_user', 'create_db','create_table',
'drop_table', 'empty_table', 'delete_row', 'create_column', 'delete_column',)
if query_type in no_return_queries:
conn_params['db'] = get_data['db'] if get_data.has_key('db') else conn_params['db']
query_data = {}
query_data.update(get_data, **post_data)
q = sql.generate_query( query_type, conn_params['dialect'],query_data)
result = sql.short_query(conn_params, q)
return HttpResponse( json.dumps(result) )
# specific queries with implementations similar to both dialects
elif query_type == 'user_rpr':
if conn_params['dialect'] == 'mysql':
conn_params['db'] = 'mysql'
r = sql.full_query(conn_params,
sql.stored_query(get_data['query'],conn_params['dialect']) )
if type(r) == dict:
r
else:
return fns.http_500(r)
elif query_type in ('indexes', 'primary_keys', 'foreign_key_relation'):
if conn_params['dialect'] == 'postgresql': conn_params['db'] = get_data['db']
r = sql.full_query(conn_params,
sql.generate_query(query_type, conn_params['dialect'], get_data)[0])
return r
elif query_type in ('get_single_row',):
sub_q_data = {'tbl': get_data['tbl'],'db':get_data['db']}
if get_data.has_key('schm'):
sub_q_data['schm'] = get_data['schm']
# generate where statement
sub_q_data['where'] = ""
for ind in range(len(post_data)):
sub_q_data['where'] += post_data.keys()[ind].strip() + "="
sub_q_data['where'] += post_data.values()[ind].strip()
if ind != len(post_data) - 1: sub_q_data['where'] += ' AND '
# retrieve and run queries
conn_params['db'] = get_data['db']
# assert False
q = sql.generate_query(query_type, conn_params['dialect'], sub_q_data)
r = sql.full_query(conn_params, q[0])
return r
elif query_type in ('table_rpr', 'table_structure', 'raw_table_structure'):
conn_params['db'] = get_data['db']
sub_q_data = {'db': get_data['db'],}
if get_data.has_key('tbl'):
sub_q_data['tbl'] = get_data['tbl']
if get_data.has_key('schm'):
sub_q_data['schm'] = get_data['schm']
# make query
if conn_params['dialect'] == 'postgresql' and query_type == 'raw_table_structure':
q = 'table_structure'
else: q = query_type
r = sql.full_query(conn_params,
sql.generate_query(q, conn_params['dialect'], sub_q_data)[0] )
# further needed processing
if conn_params['dialect'] == 'postgresql' and query_type.count('table_structure'):
rwz = []
for tuple_row in r['rows']:
row = list(tuple_row)
_l = [ row[1] ]
if row[1] in ('bit', 'bit varying', 'character varying', 'character') and type(row[4]) is int:
_l.append( '({0})'.format(row[4]) )
elif row[1] in ('numeric', 'decimal') and type(row[5]) is int or type(row[6]) is int:
_l.append( '({0},{1})'.format(row[5], row[6]) )
elif row[1] in ('interval', 'time with time zone', 'time without time zone',
'timestamp with time zone', 'timestamp without time zone') and type(row[7]) is int:
_l.append( '({0})'.format(row[7]) )
# append the current row to rwz
if query_type == 'table_structure': rwz.append([row[0], "".join(_l), row[2], row[3] ])
elif query_type == 'raw_table_structure':
row.append("".join(_l))
rwz.append(row)
# change r['rows']
r['rows'] = rwz
# change r['columns']
if query_type == 'table_structure':
r['columns'] = [ r['columns'][0], r['columns'][1], r['columns'][2], r['columns'][3] ]
elif query_type == 'raw_table_structure': r['columns'].append('column_type')
return r
elif query_type == 'browse_table':
# initializations
sub_q_data = {'tbl': get_data['tbl'],'db':get_data['db']}
sub_q_data['offset'] = get_data['offset'] if get_data.has_key('offset') else 0
sub_q_data['limit'] = get_data['limit'] if get_data.has_key('limit') else getattr(settings, 'TT_MAX_ROW_COUNT', 100)
for item in ['schm', 'sort_key', 'sort_dir']:
if get_data.has_key(item): sub_q_data[item] = get_data[item]
# retrieve and run queries
conn_params['db'] = get_data['db']
keys = rpr_query(conn_params, 'primary_keys', sub_q_data)
count = sql.full_query(conn_params,
sql.generate_query('count_rows', conn_params['dialect'], sub_q_data)[0],
)['rows']
r = sql.full_query(conn_params,
sql.generate_query(query_type, conn_params['dialect'], sub_q_data)[0]
)
# format and return data
if type(r) == dict:
r.update({'total_count': count[0][0], 'offset': sub_q_data['offset'],
'limit':sub_q_data['limit'], 'keys': keys})
return r
else:
return fns.http_500(r)
# queries that just asks formats and return result
elif query_type in ('existing_tables',):
query_data = {'db':get_data['db'],}
if get_data.has_key('tbl'): query_data['tbl'] = get_data['tbl']
if conn_params['dialect'] == 'postgresql':
query_data['schm'] = get_data['schm']
conn_params['db'] = query_data['db']
q = sql.generate_query(query_type, conn_params['dialect'], query_data)
r = sql.full_query(conn_params,
q[0])
return r['rows']
# queries with dissimilar implementations
elif conn_params['dialect'] == 'postgresql':
return fns.http_500('query ({query_type}) not implemented!'.format(query_type=query_type))
elif conn_params['dialect'] == 'mysql':
if query_type == 'describe_databases':
conn_params['db'] = 'INFORMATION_SCHEMA';
query = sql.stored_query(query_type, conn_params['dialect'])
return sql.full_query(conn_params, query)
else:
return fns.http_500('query not yet implemented!')
else:
return fns.http_500('dialect not supported!')
