PgManager, MyManager: Change log level of SQL queries to debug. Fix MyManager: Wrong query logged when exception occurs.
# -*- coding: utf-8 -*-## PgDataCopy - copy data between tables## Copyright (c) 2012 Radek Brich <radek.brich@devl.cz>## Permission is hereby granted, free of charge, to any person obtaining a copy# of this software and associated documentation files (the "Software"), to deal# in the Software without restriction, including without limitation the rights# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell# copies of the Software, and to permit persons to whom the Software is# furnished to do so, subject to the following conditions:## The above copyright notice and this permission notice shall be included in# all copies or substantial portions of the Software.## THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN# THE SOFTWARE.import ioclass TargetNotEmptyError(Exception): def __init__(self, msg, table): Exception.__init__(self, msg) self.table = tableclass PgDataCopy: def __init__(self, conn1, conn2): self.conn1 = conn1 self.conn2 = conn2 self.fulltable1 = None self.fulltable2 = None def set_source(self, table, schema='public'): self.schema1 = schema self.table1 = table self.fulltable1 = '"' + schema + '"."'+ table + '"' def set_destination(self, table, schema='public'): self.schema2 = schema self.table2 = table self.fulltable2 = '"' + schema + '"."'+ table + '"' def copy(self): self.check() buf = io.StringIO() try: self.read(buf) data = buf.getvalue() finally: buf.close() buf = io.StringIO(data) try: self.write(buf) finally: buf.close() self.analyze() def check(self): '''Check that target table does not contain any data (otherwise cannot copy).''' q = self._compose_check(self.fulltable2) curs = self.conn2.cursor() curs.execute(q) curs.connection.commit() if curs.rowcount > 0: raise TargetNotEmptyError('Target table contains data.', self.fulltable2) self.cols = [desc[0] for desc in curs.description] def read(self, tmpfile): '''Read contents from source table.''' q = self._compose_read(self.fulltable1, self.cols) curs = self.conn1.cursor() curs.copy_expert(q, tmpfile) curs.connection.commit() def write(self, tmpfile): '''Write source table contents to target table.''' q = self._compose_write(self.fulltable2, self.cols) curs = self.conn2.cursor() curs.copy_expert(q, tmpfile) curs.connection.commit() def analyze(self): '''Analyze target table.''' q = self._compose_analyze(self.fulltable2) curs = self.conn2.cursor() curs.execute(q) curs.connection.commit() def _compose_check(self, table): return 'SELECT * FROM %s LIMIT 1' % table def _compose_read(self, table, cols): collist = ', '.join(['"%s"' % col for col in cols]) return 'COPY %s (%s) TO STDOUT' % (table, collist) def _compose_write(self, table, cols): collist = ', '.join(['"%s"' % col for col in cols]) return 'COPY %s (%s) FROM STDIN' % (table, collist) def _compose_analyze(self, table): return 'ANALYZE %s' % table