Mercurial > sqlpython
annotate sqlpython/sqlpython.py @ 438:39a664a87c51
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| author | catherine@bothari |
|---|---|
| date | Sun, 31 Jan 2010 08:17:58 -0500 |
| parents | f441f2eb52e0 |
| children | 0a2474b76db6 |
| 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 |
| 426 | 12 import sqlalchemy, pyparsing, schemagroup, connections |
| 380 | 13 __version__ = '1.6.8' |
| 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 legal_hostname = pyparsing.Word(pyparsing.alphanums + '_-.')('host') + pyparsing.Optional( | |
| 99 ':' + pyparsing.Word(pyparsing.nums)('port')) | |
| 100 oracle_connect_parser = legal_sql_word('username') + ( | |
| 101 pyparsing.Optional('/' + pyparsing.CharsNotIn('@')("password")) + | |
| 102 pyparsing.Optional('@' + pyparsing.Optional(legal_hostname + '/') + | |
| 103 legal_sql_word('db_name')) + | |
| 104 pyparsing.Optional(pyparsing.CaselessKeyword('as') + | |
| 105 (pyparsing.CaselessKeyword('sysoper') ^ | |
| 106 pyparsing.CaselessKeyword('sysdba'))('mode'))) | |
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107 postgresql_connect_parser = pyparsing.Optional(legal_sql_word('db_name') + |
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108 pyparsing.Optional(legal_sql_word('username'))) |
| 407 | 109 |
| 429 | 110 def successfully_connect_to_number(self, arg): |
| 111 try: | |
| 112 instance_number = int(arg) | |
| 113 except ValueError: | |
| 114 return False | |
| 115 try: | |
| 116 self.make_instance_current(instance_number) | |
| 117 except IndexError: | |
| 118 self.list_instances() | |
| 119 return False | |
| 120 if (self.rdbms == 'oracle') and self.serveroutput: | |
| 121 self.curs.callproc('dbms_output.enable', []) | |
| 122 return True | |
| 123 | |
| 425 | 124 @cmd2.options([cmd2.make_option('-a', '--add', action='store_true', |
| 125 help='add connection (keep current connection)'), | |
| 126 cmd2.make_option('-c', '--close', action='store_true', | |
| 127 help='close connection {N} (or current)'), | |
| 128 cmd2.make_option('-C', '--closeall', action='store_true', | |
| 129 help='close all connections'), | |
| 130 cmd2.make_option('--postgres', action='store_true', help='Connect to postgreSQL: `sqlpython --postgres [DBNAME [USERNAME]]`'), | |
| 131 cmd2.make_option('--oracle', action='store_true', help='Connect to an Oracle database'), | |
| 132 cmd2.make_option('--mysql', action='store_true', help='Connect to a MySQL database'), | |
| 426 | 133 cmd2.make_option('-H', '--hostname', type='string', |
| 134 help='Machine where database is hosted (postgresql only)'), | |
| 425 | 135 cmd2.make_option('-p', '--port', type='int', |
| 136 help='Port to connect to (postgresql only)'), | |
| 426 | 137 cmd2.make_option('--password', type='string', |
| 138 help='Password (mysql only)'), | |
| 425 | 139 cmd2.make_option('-d', '--database', type='string', |
| 140 help='Database name to connect to'), | |
| 141 cmd2.make_option('-U', '--username', type='string', | |
| 142 help='Database user name to connect as') | |
| 143 ]) | |
| 426 | 144 def do_connect(self, arg, opts): |
| 425 | 145 |
| 146 '''Opens the DB connection''' | |
| 147 if opts.closeall: | |
| 148 self.closeall() | |
| 149 return | |
| 150 if opts.close: | |
| 151 if not arg: | |
| 428 | 152 arg = self.instance_number |
| 425 | 153 self.disconnect(arg) |
| 154 return | |
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155 if (not arg) and (not opts.postgres) and (not opts.mysql): |
| 428 | 156 self.list_instances() |
| 425 | 157 return |
| 158 if self.successfully_connect_to_number(arg): | |
| 159 return | |
| 160 | |
| 428 | 161 db_instance = connections.DatabaseInstance(arg, opts, default_rdbms = self.default_rdbms) |
| 162 if opts.add or (self.instance_number is None): | |
| 425 | 163 try: |
| 428 | 164 self.instance_number = max(self.instances.keys()) + 1 |
| 425 | 165 except ValueError: |
| 428 | 166 self.instance_number = 0 |
| 167 db_instance.set_instance_number(self.instance_number) | |
| 429 | 168 self.instances[self.instance_number] = db_instance |
| 428 | 169 self.make_instance_current(self.instance_number) |
| 425 | 170 if (self.rdbms == 'oracle') and self.serveroutput: |
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171 self.current_instance.connection.cursor().callproc('dbms_output.enable',[]) |
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172 #self.curs.callproc('dbms_output.enable', []) |
| 407 | 173 |
| 436 | 174 def do_pickle(self, arg): |
| 175 self.current_instance.pickle() | |
| 176 | |
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177 def postparsing_precmd(self, statement): |
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178 stop = 0 |
| 428 | 179 self.saved_instance_number = None |
| 180 if statement.parsed.instance_number: | |
| 181 saved_instance_number = self.instance_number | |
| 258 | 182 try: |
| 428 | 183 if self.successfully_connect_to_number(statement.parsed.instance_number): |
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184 if statement.parsed.command: |
| 428 | 185 self.saved_instance_number = saved_instance_number |
| 261 | 186 except KeyError: |
| 428 | 187 self.list_instances() |
| 188 raise KeyError, 'No connection #%s' % statement.parsed.instance_number | |
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189 return stop, statement |
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190 def postparsing_postcmd(self, stop): |
| 428 | 191 if self.saved_instance_number is not None: |
| 192 self.successfully_connect_to_number(self.saved_instance_number) | |
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193 return stop |
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194 |
| 256 | 195 do_host = cmd2.Cmd.do_shell |
| 189 | 196 |
| 197 def emptyline(self): | |
| 198 pass | |
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199 |
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200 def _show_errors(self, all_users=False, limit=None, mintime=None, targets=[]): |
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201 if all_users: |
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202 user = '' |
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203 else: |
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204 user = "AND ao.owner = user\n" |
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205 if targets: |
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206 target = 'AND (%s)\n' % ' OR '.join("ae.type || '/' || ae.name LIKE '%s'" % |
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207 t.upper().replace('*','%') for t in targets) |
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208 else: |
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209 target = '' |
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210 self.curs.execute(''' |
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211 SELECT ae.owner, ae.name, ae.type, ae.position, ae.line, ae.attribute, |
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212 ae.text error_text, |
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213 src.text object_text, |
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214 ao.last_ddl_time |
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215 FROM all_errors ae |
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216 JOIN all_objects ao ON ( ae.owner = ao.owner |
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217 AND ae.name = ao.object_name |
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218 AND ae.type = ao.object_type) |
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219 JOIN all_source src ON ( ae.owner = src.owner |
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220 AND ae.name = src.name |
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221 AND ae.type = src.type |
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222 AND ae.line = src.line) |
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223 WHERE 1=1 |
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224 %s%sORDER BY ao.last_ddl_time DESC''' % (user, target)) |
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225 if limit is None: |
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226 errors = self.curs.fetchall() |
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227 else: |
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228 errors = self.curs.fetchmany(numRows = limit) |
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229 for err in errors: |
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230 if (mintime is not None) and (err[8] < mintime): |
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231 break |
| 333 | 232 self.poutput('%s at line %d of %s %s.%s:' % (err[5], err[4], err[2], err[0], err[1])) |
| 233 self.poutput(err[7]) | |
| 234 self.poutput((' ' * (err[3]-1)) + '^') | |
| 235 self.poutput(err[6]) | |
| 236 self.poutput('\n') | |
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237 |
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238 def current_database_time(self): |
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239 self.curs.execute('select sysdate from dual') |
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240 return self.curs.fetchone()[0] |
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241 |
| 189 | 242 def do_terminators(self, arg): |
| 243 """; standard Oracle format | |
| 244 \\c CSV (with headings) | |
| 245 \\C CSV (no headings) | |
| 246 \\g list | |
| 247 \\G aligned list | |
| 248 \\h HTML table | |
| 249 \\i INSERT statements | |
| 266 | 250 \\j JSON |
| 308 | 251 \\r ReStructured Text |
| 189 | 252 \\s CSV (with headings) |
| 253 \\S CSV (no headings) | |
| 254 \\t transposed | |
| 255 \\x XML | |
| 256 \\l line plot, with markers | |
| 257 \\L scatter plot (no lines) | |
| 258 \\b bar graph | |
| 259 \\p pie chart""" | |
| 333 | 260 self.poutput(self.do_terminators.__doc__) |
| 189 | 261 |
| 262 terminatorSearchString = '|'.join('\\' + d.split()[0] for d in do_terminators.__doc__.splitlines()) | |
| 263 | |
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264 bindScanner = {'oracle': Parser(pyparsing.Literal(':') + pyparsing.Word( pyparsing.alphanums + "_$#" )), |
| 407 | 265 'postgres': Parser(pyparsing.Literal('%(') + legal_sql_word + ')s')} |
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266 def findBinds(self, target, givenBindVars = {}): |
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267 result = givenBindVars |
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268 #TODO: A consistent bind style? As a setting, perhaps? |
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269 if self.rdbms in self.bindScanner: |
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270 for finding, startat, endat in self.bindScanner[self.rdbms].scanner.scanString(target): |
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271 varname = finding[1] |
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272 try: |
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273 result[varname] = self.binds[varname] |
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274 except KeyError: |
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275 if not givenBindVars.has_key(varname): |
| 420 | 276 raise KeyError, 'Bind variable "%s" not defined.' % (varname) |
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277 return result |
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278 |
| 189 | 279 def default(self, arg): |
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280 self.varsUsed = self.findBinds(arg, givenBindVars={}) |
| 247 | 281 ending_args = arg.lower().split()[-2:] |
| 282 if 'end' in ending_args: | |
| 246 | 283 command = '%s %s;' |
| 284 else: | |
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285 command = '%s %s' |
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286 if self.rdbms == 'oracle': |
| 315 | 287 current_time = self.current_database_time() |
| 417 | 288 commandstring = command % (arg.parsed.command, arg.parsed.args) |
| 289 self.curs.execute(commandstring, self.varsUsed) | |
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290 executionmessage = '\nExecuted%s\n' % ((self.curs.rowcount > 0) and ' (%d rows)' % self.curs.rowcount or '') |
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291 if self.rdbms == 'oracle': |
| 315 | 292 self._show_errors(all_users=True, limit=1, mintime=current_time) |
| 333 | 293 self.pfeedback(executionmessage) |
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294 |
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295 def do_commit(self, arg=''): |
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296 self.default(self.parsed('commit %s;' % (arg))) |
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297 def do_rollback(self, arg=''): |
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298 self.default(self.parsed('rollback %s;' % (arg))) |
| 189 | 299 def do_quit(self, arg): |
| 261 | 300 if self.commit_on_exit: |
| 301 self.closeall() | |
| 189 | 302 return cmd2.Cmd.do_quit(self, None) |
| 303 do_exit = do_quit | |
| 304 do_q = do_quit | |
| 337 | 305 colorcodes = {'bold':{True:'\x1b[1m',False:'\x1b[22m'}, |
| 306 'red':{True:'\x1b[36m',False:'\x1b[39m'}, | |
| 307 'cyan':{True:'\x1b[31m',False:'\x1b[39m'}, | |
| 308 'underline':{True:'\x1b[4m',False:'\x1b[24m'}} | |
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309 colors = (platform.system() != 'Windows') |
| 337 | 310 def colorize(self, val, color): |
| 311 if self.colors and (self.stdout == self.initial_stdout): | |
| 312 if color not in self.colorcodes: | |
| 313 if (color % 2): | |
| 314 color = 'red' | |
| 315 else: | |
| 316 color = 'cyan' | |
| 317 return self.colorcodes[color][True] + val + self.colorcodes[color][False] | |
| 318 return val | |
| 400 | 319 def pmatrix(self,rows,maxlen=30,heading=True,restructuredtext=False): |
| 337 | 320 '''prints a matrix, used by sqlpython to print queries' result sets''' |
| 400 | 321 names = self.colnames |
| 322 maxen = [len(n) for n in self.colnames] | |
| 337 | 323 toprint = [] |
| 400 | 324 rcols = range(len(self.colnames)) |
| 337 | 325 rrows = range(len(rows)) |
| 326 for i in rrows: # loops for all rows | |
| 327 rowsi = map(str, rows[i]) # current row to process | |
| 328 split = [] # service var is row split is needed | |
| 329 mustsplit = 0 # flag | |
| 330 for j in rcols: | |
| 400 | 331 if str(self.coltypes[j]) == "<type 'cx_Oracle.BINARY'>": # handles RAW columns |
| 337 | 332 rowsi[j] = binascii.b2a_hex(rowsi[j]) |
| 333 maxen[j] = max(maxen[j], len(rowsi[j])) # computes max field length | |
| 334 if maxen[j] <= maxlen: | |
| 335 split.append('') | |
| 336 else: # split the line is 2 because field is too long | |
| 337 mustsplit = 1 | |
| 338 maxen[j] = maxlen | |
| 339 split.append(rowsi[j][maxlen-1:2*maxlen-1]) | |
| 340 rowsi[j] = rowsi[j][0:maxlen-1] # this implem. truncates after maxlen*2 | |
| 341 toprint.append(rowsi) # 'toprint' is a printable copy of rows | |
| 342 if mustsplit != 0: | |
| 343 toprint.append(split) | |
| 344 sepcols = [] | |
| 345 for i in rcols: | |
| 346 maxcol = maxen[i] | |
| 347 name = names[i] | |
| 348 sepcols.append("-" * maxcol) # formats column names (header) | |
| 349 names[i] = name + (" " * (maxcol-len(name))) # formats separ line with -- | |
| 350 rrows2 = range(len(toprint)) | |
| 351 for j in rrows2: | |
| 352 val = toprint[j][i] | |
| 400 | 353 if str(self.coltypes[i]) == "<type 'cx_Oracle.NUMBER'>": # right align numbers - but must generalize! |
| 337 | 354 toprint[j][i] = (" " * (maxcol-len(val))) + val |
| 355 else: | |
| 356 toprint[j][i] = val + (" " * (maxcol-len(val))) | |
| 357 toprint[j][i] = self.colorize(toprint[j][i], i) | |
| 358 for j in rrows2: | |
| 359 toprint[j] = ' '.join(toprint[j]) | |
| 360 names = [self.colorize(name, n) for (n, name) in enumerate(names)] | |
| 361 names = ' '.join(names) | |
| 362 names = self.colorize(names, 'bold') | |
| 363 sepcols = ' '.join(sepcols) | |
| 364 if heading or restructuredtext: | |
| 365 toprint.insert(0, sepcols) | |
| 366 toprint.insert(0, names) | |
| 367 if restructuredtext: | |
| 368 toprint.insert(0, sepcols) | |
| 369 toprint.append(sepcols) | |
| 370 return '\n'.join(toprint) | |
| 189 | 371 |
| 337 | 372 |
| 373 | |
| 374 | |
| 189 | 375 |