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comparison mysqlpy.py @ 0:9c87fa772ec1

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before big refactor
author catherine@serenity.wpafb.af.mil
date Fri, 30 Nov 2007 13:04:51 -0500
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children 8fa146b9a2d7
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-1:000000000000 0:9c87fa772ec1
1 #!/usr/bin/python
2 # MySqlPy V1.3
3 # Author: Luca.Canali@cern.ch
4 #
5 #
6 # Companion of SqlPython, a python module that reproduces Oracle's command line within python
7 # 'sqlplus inside python'
8 # See also: http://twiki.cern.ch/twiki/bin/view/PSSGroup/SqlPython
9 # http://catherine.devlin.googlepages.com/
10
11 from sqlpyPlus import *
12 import binascii
13
14 class mysqlpy(sqlpyPlus):
15 '''
16 MySqlPy V1.3 - 'sqlplus in python'
17 Author: Luca.Canali@cern.ch
18 Rev: 1.3.0, 17-Oct-07
19
20 Companion of SqlPython, a python module that reproduces Oracle's command line within python
21 and sqlpyPlus. Major contributions by Catherine Devlin, http://catherinedevlin.blogspot.com
22 Quick start command list:
23
24 - top -> executes a query to list all active sessions in (Oracle 10g and RAC)
25 (use: instance activity monitoring, a DBA tool)
26 - tselect -> prints the result set in trasposed form, useful to print result sets with
27 many columns such as dba_ or v$ views (ex: dba_tables or v$instance)
28 - py -> execute a python command (C.D.)
29 - db -> quick connect using credentials in pass.txt file
30 (Ex: write username and pass in pass.txt and then "db db_alias" to connect)
31 - sql -> prints the sql text from the cache. parameter: sql_id of the statement
32 (Ex: sql fzqa1qj65nagki)
33 - explain -> prints the execution plan from the cache. parameter: sql_id of the statement
34 - sessinfo-> prints session information. 1 parameter sid (Ex: sql 101 print info for sid 101)
35 - longops -> prints from gv$session_longops (running full scans, etc)
36 - load -> prints the OS load on all cluster nodes (10g RAC)
37 - sleect,slect -> alias for select (I mistyped select this way too many times...)
38 - top9i -> 9i (and single instance) version of top
39 - describe, @, !, spool, show, set, list, get, write -> sql*plus-like, from sqlpyPlus (C.D.)
40 - shortcuts: \c (connect), \d (describe), etc, from sqlpyPlus (C.D.)
41 - :myvarname = xx, set autobind 1, print -> bind variables management extension, to sqlplus (C.D.)
42
43 Example:
44 SQL> connect username@dbalias or username/pass@dbalias
45 SQL> select sysdate from dual;
46 SQL> exit
47 '''
48
49 def __init__(self):
50 sqlpyPlus.__init__(self)
51 self.maxtselctrows = 10
52 self.query_load10g = '''
53 ins.instance_name,ins.host_name,round(os.value,2) load
54 from gv$osstat os, gv$instance ins
55 where os.inst_id=ins.inst_id and os.stat_name='LOAD'
56 order by 3 desc;
57 '''
58 self.query_top9i = '''
59 sid,username,osuser||'@'||terminal "Server User@terminal",program,taddr, status,
60 module, sql_hash_value hash, fixed_table_sequence seq, last_call_et elaps
61 from v$session
62 where username is not null and program not like 'emagent%' and status='ACTIVE'
63 and audsid !=sys_context('USERENV','SESSIONID');
64 '''
65 self.query_ractop = '''
66 inst_id||'_'||sid inst_sid,username,osuser||'@'||terminal "User@Term",program, decode(taddr,null,null,'NN') tr,
67 sql_id, '.'||mod(fixed_table_sequence,1000) seq, state||': '||event event,
68 case state when 'WAITING' then seconds_in_wait else wait_time end w_tim, last_call_et elaps
69 from gv$session
70 where status='ACTIVE' and username is not null
71 and not (event like '% waiting for messages in the queue' and state='WAITING')
72 and audsid !=sys_context('USERENV','SESSIONID');
73 '''
74 self.query_longops = '''
75 inst_id,sid,username,time_remaining remaining, elapsed_seconds elapsed, sql_hash_value hash, opname,message
76 from gv$session_longops
77 where time_remaining>0;
78 '''
79
80 def do_top9i(self,args):
81 '''Runs query_top9i defined above, to display active sessions in Oracle 9i'''
82 self.do_select(self.query_top9i)
83
84 def do_top(self,args):
85 '''Runs query_ractop defined above, to display active sessions in Oracle 10g (and RAC)'''
86 self.do_select(self.query_ractop)
87
88 def do_longops(self,args):
89 '''Runs query_longops defined above, to display long running operations (full scans, etc)'''
90 self.do_select(self.query_longops)
91
92 def do_load(self,args):
93 '''Runs query_load10g defined above, to display OS load on cluster nodes (10gRAC)'''
94 self.do_select(self.query_load10g)
95
96 def do_db(self,args,filepath='pass.txt'):
97 '''Exec do_connect to db_alias in args (credentials form the file pass.txt) '''
98 f = open(filepath,'r')
99 connectstr = f.readline().strip() +'@'+args
100 self.do_connect(connectstr)
101 f.close()
102
103 def do_py(self, arg):
104 '''Executes a python command'''
105 try:
106 exec(arg)
107 except Exception, e:
108 print e
109
110 def do_tselect(self, arg, rowlimit=None):
111 '''executes a query and prints the result in trasposed form. Useful when querying tables with many columns'''
112 self.query = sqlpython.Statement('select '+arg).query
113 try:
114 print self.query
115 self.curs.execute(self.query)
116 rows = self.curs.fetchmany(min(self.maxtselctrows, rowlimit or self.maxtselctrows))
117 desc = self.curs.description
118 self.rc = self.curs.rowcount
119 rows.insert(0,[desc[x][0] for x in range(len(desc))]) # adds column name to the row set
120 transpr = [[rows[y][x] for y in range(len(rows))]for x in range(len(rows[0]))] # matrix transpose
121 newdesc = [['ROW N.'+str(y),10] for y in range(len(rows))]
122 for x in range(len(desc)):
123 if str(desc[x][1]) == "<type 'cx_Oracle.BINARY'>": # handles RAW columns
124 rname = transpr[x][0]
125 transpr[x] = map(binascii.b2a_hex, transpr[x])
126 transpr[x][0] = rname
127 self.debg=transpr
128 newdesc[0][0] = 'COLUMN NAME'
129 if self.rc > 0:
130 print '\n' + sqlpython.pmatrix(transpr,newdesc)
131 if self.rc == 0:
132 print '\nNo rows Selected.\n'
133 elif self.rc == 1:
134 print '\n1 row selected.\n'
135 elif self.rc < self.maxtselctrows:
136 print '\n%d rows selected.\n' % self.rc
137 else:
138 print '\nSelected Max Num rows (%d)' % self.rc
139 except Exception, e:
140 print e
141
142 def do_sql(self,args):
143 '''prints sql statement give the sql_id (Oracle 10gR2)'''
144 self.query = "select inst_id, sql_fulltext from gv$sqlstats where sql_id='"+args+"'"
145 try:
146 self.curs.execute(self.query)
147 row = self.curs.fetchone()
148 print "\nSQL statement from cache"
149 print "------------------------\n"
150 while row:
151 print "\nINST_ID = "+str(row[0])+" - SQL TEXT:\n", row[1].read()
152 row = self.curs.next()
153 except Exception, e:
154 print e
155
156 def do_explain(self,args):
157 '''prints the plan of a given statement from the sql cache. 1 parameter: sql_id, see also do_sql '''
158 self.query = "select * from table(dbms_xplan.display_cursor('"+args+"'))"
159 try:
160 self.curs.execute(self.query)
161 rows = self.curs.fetchall()
162 desc = self.curs.description
163 self.rc = self.curs.rowcount
164 if self.rc > 0:
165 print '\n' + sqlpython.pmatrix(rows,desc,200)
166 except Exception, e:
167 print e
168
169 def do_sessinfo(self,args):
170 '''Reports session info for the give sid, extended to RAC with gv$'''
171 self.do_tselect('* from gv$session where sid='+args+';')
172
173 def do_sleect(self,args):
174 '''implements sleect = select, a common typo'''
175 self.do_select(args)
176
177 do_slect = do_sleect
178
179 def run():
180 my=mysqlpy()
181 print my.__doc__
182 my.cmdloop()
183
184 if __name__ == '__main__':
185 run()