Mercurial > sqlpython
annotate sqlpython/sqlpython.py @ 451:fd86d22fe00d
mostly compatible with cmd2 0.6 - minor transcript test problem
| author | catherine@Drou |
|---|---|
| date | Mon, 15 Feb 2010 17:44:56 -0500 |
| parents | b34ea206c7d1 |
| children | c6394c335e45 |
| rev | line source |
|---|---|
| 189 | 1 # |
| 368 | 2 # SqlPython V1.6.7 |
| 189 | 3 # Author: Luca.Canali@cern.ch, Apr 2006 |
| 380 | 4 # Rev 2-Sep-09 |
| 368 | 5 |
| 189 | 6 # A python module to reproduce Oracle's command line 'sqlplus-like' within python |
| 7 # Intended to allow easy customizations and extentions | |
| 8 # Best used with the companion modules sqlpyPlus and mysqlpy | |
| 9 # See also http://twiki.cern.ch/twiki/bin/view/PSSGroup/SqlPython | |
| 10 | |
| 415 | 11 import cmd2,getpass,binascii,re,os,platform |
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12 import pyparsing, connections |
| 443 | 13 __version__ = '1.7.0' |
| 415 | 14 try: |
| 15 import cx_Oracle | |
| 16 except ImportError: | |
| 17 cx_Oracle = None | |
| 18 try: | |
| 19 import psycopg2 | |
| 20 except ImportError: | |
| 21 psycopg2 = None | |
| 189 | 22 |
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23 class Parser(object): |
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24 comment_def = "--" + pyparsing.NotAny('-' + pyparsing.CaselessKeyword('begin')) + pyparsing.ZeroOrMore(pyparsing.CharsNotIn("\n")) |
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25 def __init__(self, scanner, retainSeparator=True): |
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26 self.scanner = scanner |
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27 self.scanner.ignore(pyparsing.sglQuotedString) |
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28 self.scanner.ignore(pyparsing.dblQuotedString) |
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29 self.scanner.ignore(self.comment_def) |
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30 self.scanner.ignore(pyparsing.cStyleComment) |
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31 self.retainSeparator = retainSeparator |
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32 def separate(self, txt): |
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33 itms = [] |
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34 for (sqlcommand, start, end) in self.scanner.scanString(txt): |
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35 if sqlcommand: |
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36 if type(sqlcommand[0]) == pyparsing.ParseResults: |
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37 if self.retainSeparator: |
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38 itms.append("".join(sqlcommand[0])) |
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39 else: |
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40 itms.append(sqlcommand[0][0]) |
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41 else: |
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42 if sqlcommand[0]: |
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43 itms.append(sqlcommand[0]) |
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44 return itms |
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45 |
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46 |
| 189 | 47 class sqlpython(cmd2.Cmd): |
| 48 '''A python module to reproduce Oracle's command line with focus on customization and extention''' | |
| 49 | |
| 50 def __init__(self): | |
| 51 cmd2.Cmd.__init__(self) | |
| 428 | 52 self.no_instance() |
| 189 | 53 self.maxfetch = 1000 |
| 54 self.terminator = ';' | |
| 55 self.timeout = 30 | |
| 56 self.commit_on_exit = True | |
| 428 | 57 self.instances = {} |
| 260 | 58 |
| 428 | 59 def no_instance(self): |
| 261 | 60 self.prompt = 'SQL.No_Connection> ' |
| 260 | 61 self.curs = None |
| 429 | 62 self.current_instance = None |
| 428 | 63 self.instance_number = None |
| 189 | 64 |
| 428 | 65 def make_instance_current(self, instance_number): |
| 66 db_instance = self.instances[instance_number] | |
| 429 | 67 self.prompt = db_instance.prompt |
| 68 self.rdbms = db_instance.rdbms | |
| 428 | 69 self.instance_number = instance_number |
| 429 | 70 self.curs = db_instance.connection.cursor() |
| 428 | 71 self.current_instance = db_instance |
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72 |
| 428 | 73 def list_instances(self): |
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74 self.stdout.write('Existing connections:\n') |
| 428 | 75 self.stdout.write('\n'.join('%s (%s)' % (v.prompt, v.rdbms) |
| 76 for (k,v) in sorted(self.instances.items())) + '\n') | |
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77 |
| 260 | 78 def disconnect(self, arg): |
| 79 try: | |
| 428 | 80 instance_number = int(arg) |
| 81 instance = self.instances[instance_number] | |
| 261 | 82 except (ValueError, KeyError): |
| 428 | 83 self.list_instances() |
| 260 | 84 return |
| 85 if self.commit_on_exit: | |
| 428 | 86 instance.connection.commit() |
| 87 self.instances.pop(instance_number) | |
| 88 if instance_number == self.instance_number: | |
| 89 self.no_instance() | |
| 261 | 90 |
| 91 def closeall(self): | |
| 428 | 92 for instance_number in self.instances.keys(): |
| 93 self.disconnect(instance_number) | |
| 261 | 94 self.curs = None |
| 428 | 95 self.no_instance() |
| 261 | 96 |
| 407 | 97 legal_sql_word = pyparsing.Word(pyparsing.alphanums + '_$#') |
| 98 | |
| 429 | 99 def successfully_connect_to_number(self, arg): |
| 100 try: | |
| 101 instance_number = int(arg) | |
| 102 except ValueError: | |
| 103 return False | |
| 104 try: | |
| 105 self.make_instance_current(instance_number) | |
| 106 except IndexError: | |
| 107 self.list_instances() | |
| 108 return False | |
| 109 if (self.rdbms == 'oracle') and self.serveroutput: | |
| 110 self.curs.callproc('dbms_output.enable', []) | |
| 111 return True | |
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112 |
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113 @cmd2.options([cmd2.make_option('-a', '--add', action='store_true', |
| 425 | 114 help='add connection (keep current connection)'), |
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115 cmd2.make_option('-c', '--close', action='store_true', |
| 425 | 116 help='close connection {N} (or current)'), |
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117 cmd2.make_option('-C', '--closeall', action='store_true', |
| 425 | 118 help='close all connections'), |
| 119 cmd2.make_option('--postgres', action='store_true', help='Connect to postgreSQL: `sqlpython --postgres [DBNAME [USERNAME]]`'), | |
| 120 cmd2.make_option('--oracle', action='store_true', help='Connect to an Oracle database'), | |
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121 cmd2.make_option('--mysql', action='store_true', help='Connect to a MySQL database'), |
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122 cmd2.make_option('-H', '--hostname', type='string', |
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123 help='Machine where database is hosted'), |
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124 cmd2.make_option('-p', '--port', type='int', |
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125 help='Port to connect to'), |
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126 cmd2.make_option('--password', type='string', |
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127 help='Password'), |
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128 cmd2.make_option('-d', '--database', type='string', |
| 425 | 129 help='Database name to connect to'), |
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130 cmd2.make_option('-U', '--username', type='string', |
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131 help='Database user name to connect as')]) |
| 426 | 132 def do_connect(self, arg, opts): |
| 425 | 133 |
| 134 '''Opens the DB connection''' | |
| 135 if opts.closeall: | |
| 136 self.closeall() | |
| 137 return | |
| 138 if opts.close: | |
| 139 if not arg: | |
| 428 | 140 arg = self.instance_number |
| 425 | 141 self.disconnect(arg) |
| 142 return | |
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143 if (not arg) and (not opts.postgres) and (not opts.mysql): |
| 428 | 144 self.list_instances() |
| 425 | 145 return |
| 146 if self.successfully_connect_to_number(arg): | |
| 147 return | |
| 148 | |
| 428 | 149 db_instance = connections.DatabaseInstance(arg, opts, default_rdbms = self.default_rdbms) |
| 150 if opts.add or (self.instance_number is None): | |
| 425 | 151 try: |
| 428 | 152 self.instance_number = max(self.instances.keys()) + 1 |
| 425 | 153 except ValueError: |
| 428 | 154 self.instance_number = 0 |
| 155 db_instance.set_instance_number(self.instance_number) | |
| 429 | 156 self.instances[self.instance_number] = db_instance |
| 428 | 157 self.make_instance_current(self.instance_number) |
| 425 | 158 if (self.rdbms == 'oracle') and self.serveroutput: |
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159 self.current_instance.connection.cursor().callproc('dbms_output.enable',[]) |
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160 #self.curs.callproc('dbms_output.enable', []) |
| 407 | 161 |
| 436 | 162 def do_pickle(self, arg): |
| 163 self.current_instance.pickle() | |
| 164 | |
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165 def postparsing_precmd(self, statement): |
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166 stop = 0 |
| 428 | 167 self.saved_instance_number = None |
| 168 if statement.parsed.instance_number: | |
| 169 saved_instance_number = self.instance_number | |
| 258 | 170 try: |
| 428 | 171 if self.successfully_connect_to_number(statement.parsed.instance_number): |
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172 if statement.parsed.command: |
| 428 | 173 self.saved_instance_number = saved_instance_number |
| 261 | 174 except KeyError: |
| 428 | 175 self.list_instances() |
| 176 raise KeyError, 'No connection #%s' % statement.parsed.instance_number | |
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177 return stop, statement |
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178 def postparsing_postcmd(self, stop): |
| 428 | 179 if self.saved_instance_number is not None: |
| 180 self.successfully_connect_to_number(self.saved_instance_number) | |
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181 return stop |
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182 |
| 256 | 183 do_host = cmd2.Cmd.do_shell |
| 189 | 184 |
| 185 def emptyline(self): | |
| 186 pass | |
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187 |
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188 def _show_errors(self, all_users=False, limit=None, mintime=None, targets=[]): |
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189 if all_users: |
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190 user = '' |
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191 else: |
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192 user = "AND ao.owner = user\n" |
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193 if targets: |
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194 target = 'AND (%s)\n' % ' OR '.join("ae.type || '/' || ae.name LIKE '%s'" % |
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195 t.upper().replace('*','%') for t in targets) |
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196 else: |
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197 target = '' |
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198 self.curs.execute(''' |
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199 SELECT ae.owner, ae.name, ae.type, ae.position, ae.line, ae.attribute, |
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200 ae.text error_text, |
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201 src.text object_text, |
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202 ao.last_ddl_time |
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203 FROM all_errors ae |
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204 JOIN all_objects ao ON ( ae.owner = ao.owner |
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205 AND ae.name = ao.object_name |
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206 AND ae.type = ao.object_type) |
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207 JOIN all_source src ON ( ae.owner = src.owner |
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208 AND ae.name = src.name |
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209 AND ae.type = src.type |
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210 AND ae.line = src.line) |
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211 WHERE 1=1 |
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212 %s%sORDER BY ao.last_ddl_time DESC''' % (user, target)) |
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213 if limit is None: |
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214 errors = self.curs.fetchall() |
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215 else: |
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216 errors = self.curs.fetchmany(numRows = limit) |
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217 for err in errors: |
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218 if (mintime is not None) and (err[8] < mintime): |
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219 break |
| 333 | 220 self.poutput('%s at line %d of %s %s.%s:' % (err[5], err[4], err[2], err[0], err[1])) |
| 221 self.poutput(err[7]) | |
| 222 self.poutput((' ' * (err[3]-1)) + '^') | |
| 223 self.poutput(err[6]) | |
| 224 self.poutput('\n') | |
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225 |
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226 def current_database_time(self): |
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227 self.curs.execute('select sysdate from dual') |
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228 return self.curs.fetchone()[0] |
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229 |
| 189 | 230 def do_terminators(self, arg): |
| 231 """; standard Oracle format | |
| 232 \\c CSV (with headings) | |
| 233 \\C CSV (no headings) | |
| 234 \\g list | |
| 235 \\G aligned list | |
| 236 \\h HTML table | |
| 237 \\i INSERT statements | |
| 266 | 238 \\j JSON |
| 308 | 239 \\r ReStructured Text |
| 189 | 240 \\s CSV (with headings) |
| 241 \\S CSV (no headings) | |
| 242 \\t transposed | |
| 243 \\x XML | |
| 244 \\l line plot, with markers | |
| 245 \\L scatter plot (no lines) | |
| 246 \\b bar graph | |
| 247 \\p pie chart""" | |
| 333 | 248 self.poutput(self.do_terminators.__doc__) |
| 189 | 249 |
| 250 terminatorSearchString = '|'.join('\\' + d.split()[0] for d in do_terminators.__doc__.splitlines()) | |
| 251 | |
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252 bindScanner = {'oracle': Parser(pyparsing.Literal(':') + pyparsing.Word( pyparsing.alphanums + "_$#" )), |
| 407 | 253 'postgres': Parser(pyparsing.Literal('%(') + legal_sql_word + ')s')} |
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254 def findBinds(self, target, givenBindVars = {}): |
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255 result = givenBindVars |
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256 #TODO: A consistent bind style? As a setting, perhaps? |
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257 if self.rdbms in self.bindScanner: |
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258 for finding, startat, endat in self.bindScanner[self.rdbms].scanner.scanString(target): |
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259 varname = finding[1] |
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260 try: |
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261 result[varname] = self.binds[varname] |
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262 except KeyError: |
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263 if not givenBindVars.has_key(varname): |
| 420 | 264 raise KeyError, 'Bind variable "%s" not defined.' % (varname) |
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265 return result |
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266 |
| 189 | 267 def default(self, arg): |
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268 self.varsUsed = self.findBinds(arg, givenBindVars={}) |
| 247 | 269 ending_args = arg.lower().split()[-2:] |
| 270 if 'end' in ending_args: | |
| 246 | 271 command = '%s %s;' |
| 272 else: | |
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264
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273 command = '%s %s' |
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274 if self.rdbms == 'oracle': |
| 315 | 275 current_time = self.current_database_time() |
| 417 | 276 commandstring = command % (arg.parsed.command, arg.parsed.args) |
| 277 self.curs.execute(commandstring, self.varsUsed) | |
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278 executionmessage = '\nExecuted%s\n' % ((self.curs.rowcount > 0) and ' (%d rows)' % self.curs.rowcount or '') |
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279 if self.rdbms == 'oracle': |
| 315 | 280 self._show_errors(all_users=True, limit=1, mintime=current_time) |
| 333 | 281 self.pfeedback(executionmessage) |
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282 |
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283 def do_commit(self, arg=''): |
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284 self.default(self.parsed('commit %s;' % (arg))) |
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285 def do_rollback(self, arg=''): |
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286 self.default(self.parsed('rollback %s;' % (arg))) |
| 189 | 287 def do_quit(self, arg): |
| 261 | 288 if self.commit_on_exit: |
| 289 self.closeall() | |
| 189 | 290 return cmd2.Cmd.do_quit(self, None) |
| 291 do_exit = do_quit | |
| 292 do_q = do_quit | |
| 337 | 293 def colorize(self, val, color): |
| 443 | 294 if color not in self.colorcodes: |
| 295 if (color % 2): | |
| 296 color = 'red' | |
| 297 else: | |
| 298 color = 'cyan' | |
| 299 return cmd2.Cmd.colorize(self, val, color) | |
| 400 | 300 def pmatrix(self,rows,maxlen=30,heading=True,restructuredtext=False): |
| 337 | 301 '''prints a matrix, used by sqlpython to print queries' result sets''' |
| 400 | 302 names = self.colnames |
| 303 maxen = [len(n) for n in self.colnames] | |
| 337 | 304 toprint = [] |
| 400 | 305 rcols = range(len(self.colnames)) |
| 337 | 306 rrows = range(len(rows)) |
| 307 for i in rrows: # loops for all rows | |
| 308 rowsi = map(str, rows[i]) # current row to process | |
| 309 split = [] # service var is row split is needed | |
| 310 mustsplit = 0 # flag | |
| 311 for j in rcols: | |
| 400 | 312 if str(self.coltypes[j]) == "<type 'cx_Oracle.BINARY'>": # handles RAW columns |
| 337 | 313 rowsi[j] = binascii.b2a_hex(rowsi[j]) |
| 314 maxen[j] = max(maxen[j], len(rowsi[j])) # computes max field length | |
| 315 if maxen[j] <= maxlen: | |
| 316 split.append('') | |
| 317 else: # split the line is 2 because field is too long | |
| 318 mustsplit = 1 | |
| 319 maxen[j] = maxlen | |
| 320 split.append(rowsi[j][maxlen-1:2*maxlen-1]) | |
| 321 rowsi[j] = rowsi[j][0:maxlen-1] # this implem. truncates after maxlen*2 | |
| 322 toprint.append(rowsi) # 'toprint' is a printable copy of rows | |
| 323 if mustsplit != 0: | |
| 324 toprint.append(split) | |
| 325 sepcols = [] | |
| 326 for i in rcols: | |
| 327 maxcol = maxen[i] | |
| 328 name = names[i] | |
| 329 sepcols.append("-" * maxcol) # formats column names (header) | |
| 330 names[i] = name + (" " * (maxcol-len(name))) # formats separ line with -- | |
| 331 rrows2 = range(len(toprint)) | |
| 332 for j in rrows2: | |
| 333 val = toprint[j][i] | |
| 400 | 334 if str(self.coltypes[i]) == "<type 'cx_Oracle.NUMBER'>": # right align numbers - but must generalize! |
| 337 | 335 toprint[j][i] = (" " * (maxcol-len(val))) + val |
| 336 else: | |
| 337 toprint[j][i] = val + (" " * (maxcol-len(val))) | |
| 338 toprint[j][i] = self.colorize(toprint[j][i], i) | |
| 339 for j in rrows2: | |
| 340 toprint[j] = ' '.join(toprint[j]) | |
| 341 names = [self.colorize(name, n) for (n, name) in enumerate(names)] | |
| 342 names = ' '.join(names) | |
| 343 names = self.colorize(names, 'bold') | |
| 344 sepcols = ' '.join(sepcols) | |
| 345 if heading or restructuredtext: | |
| 346 toprint.insert(0, sepcols) | |
| 347 toprint.insert(0, names) | |
| 348 if restructuredtext: | |
| 349 toprint.insert(0, sepcols) | |
| 350 toprint.append(sepcols) | |
| 351 return '\n'.join(toprint) | |
| 189 | 352 |
| 337 | 353 |
| 354 | |
| 355 | |
| 189 | 356 |