pgtoolkit/pgdiff.py
author Radek Brich <radek.brich@devl.cz>
Thu, 13 Dec 2012 16:07:13 +0100
changeset 54 291473ab847c
parent 53 4a049a5af657
child 58 0bcc13460dae
permissions -rw-r--r--
Fix PgDataDiff.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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# -*- coding: utf-8 -*-
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#
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# PgDiff - capture differences of database metadata
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#
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# Depends on PgBrowser
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#
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# Copyright (c) 2011  Radek Brich <radek.brich@devl.cz>
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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from pgtoolkit.highlight import *
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class DiffBase:
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    COLORS = {
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        '+' : BOLD | GREEN,
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        '-' : BOLD | RED,
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        '*' : BOLD | YELLOW,
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    }
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    COMMANDS = {
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        '+' : 'CREATE',
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        '-' : 'DROP',
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        '*' : 'ALTER',
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    }
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    def __init__(self):
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        self.changes = None
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    def format(self):
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        out = ['  ' * self.level]
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        out.append(highlight(1, self.COLORS[self.change]))
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        out.append(self.change)
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        out += [' ', self.type, ' ', self.name, highlight(0)]
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        if self.changes:
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            out += [highlight(1, WHITE), ' (', self._formatchanges(), ')', highlight(0)]
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        return ''.join(out)
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    def _formatnotnull(self, notnull):
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        if notnull:
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            return 'NOT NULL'
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        else:
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            return None
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    def _formatchanges(self):
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        res = []
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        for x in self.changes:
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            type, a, b = x
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            if type == 'notnull':
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                type = ''
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                a = self._formatnotnull(a)
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                b = self._formatnotnull(b)
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            if a and b:
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                s = ''.join(['Changed ', type, ' from ',
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                    highlight(1,15), a, highlight(0), ' to ',
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                    highlight(1,15), b, highlight(0), '.'])
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            elif a and not b:
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                l = ['Removed ']
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                if type:
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                    l += [type, ' ']
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                l += [highlight(1,15), a, highlight(0), '.']
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                s = ''.join(l)
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            elif b and not a:
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                l = ['Added ']
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                if type:
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                    l += [type, ' ']
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                l += [highlight(1,15), b, highlight(0), '.']
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                s = ''.join(l)
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            res.append(s)
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        return ' '.join(res)
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    def format_patch(self):
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        if self.change == '*' and self.type in ('schema', 'table'):
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            return None
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        return ['%s %s %s;' % (self.COMMANDS[self.change], self.type.upper(), self.name)]
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class DiffSchema(DiffBase):
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    def __init__(self, change, schema):
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        DiffBase.__init__(self)
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        self.level = 0
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        self.type = 'schema'
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        self.change = change
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        self.schema = schema
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        self.name = schema
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class DiffTable(DiffBase):
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    def __init__(self, change, schema, table):
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        DiffBase.__init__(self)
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        self.level = 1
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        self.type = 'table'
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        self.change = change
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        self.schema = schema
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        self.table = table
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        self.name = table
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class DiffColumn(DiffBase):
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    ALTER_COMMANDS = {
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        '+' : 'ADD',
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        '-' : 'DROP',
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        '*' : 'ALTER',
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    }
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    def __init__(self, change, schema, table, column, columntype, columndefault, changes=None):
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        DiffBase.__init__(self)
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        self.level = 2
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        self.type = 'column'
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        self.change = change
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        self.schema = schema
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        self.table = table
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        self.column = column
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        self.columntype = columntype
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        self.columndefault = columndefault
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        self.name = column
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        self.changes = changes
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    def format_patch(self):
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   142
        if self.change == '*':
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diff changeset
   143
            type_statement = ' TYPE'
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diff changeset
   144
        else:
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diff changeset
   145
            type_statement = ''
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diff changeset
   146
        if self.columntype is not None:
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diff changeset
   147
            type_statement += ' ' + self.columntype;
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   148
        out = []
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diff changeset
   149
        out += ['ALTER TABLE %s.%s %s COLUMN %s%s;' % (
47
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diff changeset
   150
            self.schema,
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diff changeset
   151
            self.table,
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diff changeset
   152
            self.ALTER_COMMANDS[self.change],
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diff changeset
   153
            self.name,
53
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diff changeset
   154
            type_statement
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diff changeset
   155
        )]
47
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diff changeset
   156
        if self.columndefault:
53
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diff changeset
   157
            out += ['ALTER TABLE %s.%s ALTER COLUMN %s SET DEFAULT %s;' % (
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diff changeset
   158
                self.schema,
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diff changeset
   159
                self.table,
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diff changeset
   160
                self.name,
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diff changeset
   161
                self.columndefault
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
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diff changeset
   162
                )]
47
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parents: 9
diff changeset
   163
        return out
0
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parents:
diff changeset
   164
eaae9539e910 Postgres tools.
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diff changeset
   165
eaae9539e910 Postgres tools.
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   166
class DiffConstraint(DiffBase):
53
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diff changeset
   167
    def __init__(self, change, schema, table, constraint, definition, changes=None):
0
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   168
        DiffBase.__init__(self)
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   169
        self.level = 2
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   170
        self.type = 'constraint'
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   171
        self.change = change
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   172
        self.schema = schema
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   173
        self.table = table
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   174
        self.constraint = constraint
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   175
        self.name = constraint
53
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   176
        self.definition = definition
0
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   177
        self.changes = changes
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parents:
diff changeset
   178
53
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   179
    def format_patch(self):
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
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   180
        q_alter = 'ALTER TABLE %s.%s' % (self.schema, self.table)
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
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   181
        q_drop = '%s DROP CONSTRAINT %s;' % (q_alter, self.constraint)
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
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diff changeset
   182
        q_add = '%s ADD CONSTRAINT %s %s;' % (q_alter, self.constraint, self.definition)
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
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diff changeset
   183
        if self.change == '*':
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
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diff changeset
   184
            out = [q_drop, q_add]
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
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parents: 47
diff changeset
   185
        if self.change == '+':
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
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parents: 47
diff changeset
   186
            out = [q_add]
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   187
        if self.change == '-':
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
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parents: 47
diff changeset
   188
            out = [q_drop]
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
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diff changeset
   189
        return out
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
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diff changeset
   190
0
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   191
eaae9539e910 Postgres tools.
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parents:
diff changeset
   192
class PgDiff:
eaae9539e910 Postgres tools.
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parents:
diff changeset
   193
    def __init__(self, srcbrowser=None, dstbrowser=None):
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   194
        self.allowcolor = False
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   195
        self.src = srcbrowser
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   196
        self.dst = dstbrowser
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   197
        self.include_schemas = set()  # if not empty, consider only these schemas for diff
eaae9539e910 Postgres tools.
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parents:
diff changeset
   198
        self.exclude_schemas = set()  # exclude these schemas from diff
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   199
        self.include_tables = set()
eaae9539e910 Postgres tools.
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parents:
diff changeset
   200
        self.exclude_tables = set()
53
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diff changeset
   201
47
bb8c729ae6ce PgDiff: add partial support for SQL patch.
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parents: 9
diff changeset
   202
    def _test_schema(self, schema):
0
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   203
        if self.include_schemas and schema not in self.include_schemas:
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   204
            return False
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   205
        if schema in self.exclude_schemas:
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   206
            return False
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   207
        return True
53
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   208
47
bb8c729ae6ce PgDiff: add partial support for SQL patch.
Radek Brich <radek.brich@devl.cz>
parents: 9
diff changeset
   209
    def _test_table(self, table):
bb8c729ae6ce PgDiff: add partial support for SQL patch.
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diff changeset
   210
        if self.include_tables and table not in self.include_tables:
0
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   211
            return False
47
bb8c729ae6ce PgDiff: add partial support for SQL patch.
Radek Brich <radek.brich@devl.cz>
parents: 9
diff changeset
   212
        if table in self.exclude_tables:
0
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   213
            return False
53
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   214
        return True
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   215
47
bb8c729ae6ce PgDiff: add partial support for SQL patch.
Radek Brich <radek.brich@devl.cz>
parents: 9
diff changeset
   216
    def _diff_names(self, src, dst):
0
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   217
        for x in src:
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   218
            if x in dst:
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   219
                yield ('*', x)
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   220
            else:
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   221
                yield ('-', x)
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   222
        for x in dst:
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   223
            if x not in src:
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   224
                yield ('+', x)
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   225
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   226
    def _compare_columns(self, a, b):
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   227
        diff = []
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   228
        if a.type != b.type:
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   229
            diff.append(('type', a.type, b.type))
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   230
        if a.notnull != b.notnull:
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   231
            diff.append(('notnull', a.notnull, b.notnull))
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   232
        if a.default != b.default:
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   233
            diff.append(('default', a.default, b.default))
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   234
        return diff
53
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   235
0
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   236
    def _compare_constraints(self, a, b):
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   237
        diff = []
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   238
        if a.type != b.type:
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   239
            diff.append(('type', a.type, b.type))
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   240
        if a.definition != b.definition:
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   241
            diff.append(('definition', a.definition, b.definition))
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   242
        return diff
53
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   243
0
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   244
    def _diff_columns(self, schema, table, src_columns, dst_columns):
47
bb8c729ae6ce PgDiff: add partial support for SQL patch.
Radek Brich <radek.brich@devl.cz>
parents: 9
diff changeset
   245
        for nd in self._diff_names(src_columns, dst_columns):
53
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   246
            if nd[1] in dst_columns:
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   247
                dst_type = dst_columns[nd[1]].type
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   248
                dst_default = dst_columns[nd[1]].default
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   249
            else:
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   250
                dst_type = None
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   251
                dst_default = None
47
bb8c729ae6ce PgDiff: add partial support for SQL patch.
Radek Brich <radek.brich@devl.cz>
parents: 9
diff changeset
   252
            cdo = DiffColumn(change=nd[0], schema=schema, table=table, column=nd[1],
53
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   253
                columntype=dst_type, columndefault=dst_default)
0
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   254
            if nd[0] == '*':
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   255
                a = src_columns[nd[1]]
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   256
                b = dst_columns[nd[1]]
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   257
                cdo.changes = self._compare_columns(a, b)
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   258
                if cdo.changes:
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   259
                    yield cdo
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   260
            else:
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   261
                yield cdo
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   262
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   263
    def _diff_constraints(self, schema, table, src_constraints, dst_constraints):
47
bb8c729ae6ce PgDiff: add partial support for SQL patch.
Radek Brich <radek.brich@devl.cz>
parents: 9
diff changeset
   264
        for nd in self._diff_names(src_constraints, dst_constraints):
53
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   265
            if nd[1] in dst_constraints:
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   266
                dst_definition = dst_constraints[nd[1]].definition
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   267
            else:
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   268
                dst_definition = None
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   269
            cdo = DiffConstraint(change=nd[0], schema=schema, table=table, constraint=nd[1],
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   270
                definition=dst_definition)
0
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   271
            if nd[0] == '*':
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   272
                a = src_constraints[nd[1]]
eaae9539e910 Postgres tools.
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parents:
diff changeset
   273
                b = dst_constraints[nd[1]]
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   274
                cdo.changes = self._compare_constraints(a, b)
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   275
                if cdo.changes:
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   276
                    yield cdo
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   277
            else:
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   278
                yield cdo
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   279
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   280
    def _difftables(self, schema, src_tables, dst_tables):
47
bb8c729ae6ce PgDiff: add partial support for SQL patch.
Radek Brich <radek.brich@devl.cz>
parents: 9
diff changeset
   281
        for nd in self._diff_names(src_tables, dst_tables):
bb8c729ae6ce PgDiff: add partial support for SQL patch.
Radek Brich <radek.brich@devl.cz>
parents: 9
diff changeset
   282
            if not self._test_table(nd[1]):
0
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   283
                continue
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   284
            tdo = DiffTable(change=nd[0], schema=schema, table=nd[1])
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   285
            if nd[0] == '*':
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   286
                # columns
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   287
                src_columns = src_tables[nd[1]].columns
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   288
                dst_columns = dst_tables[nd[1]].columns
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   289
                for cdo in self._diff_columns(schema, nd[1], src_columns, dst_columns):
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   290
                    if tdo:
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   291
                        yield tdo
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   292
                        tdo = None
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   293
                    yield cdo
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   294
                # constraints
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   295
                src_constraints = src_tables[nd[1]].constraints
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   296
                dst_constraints = dst_tables[nd[1]].constraints
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   297
                for cdo in self._diff_constraints(schema, nd[1], src_constraints, dst_constraints):
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   298
                    if tdo:
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   299
                        yield tdo
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   300
                        tdo = None
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   301
                    yield cdo
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   302
            else:
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   303
                yield tdo
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   304
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   305
    def iter_diff(self):
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   306
        '''Return diff between src and dst database schema.
53
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   307
0
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   308
        Yields one line at the time. Each line is in form of object
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   309
        iherited from DiffBase. This object contains all information
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   310
        about changes. See format() method.
53
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   311
0
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   312
        '''
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   313
        src_schemas = self.src.schemas
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   314
        dst_schemas = self.dst.schemas
47
bb8c729ae6ce PgDiff: add partial support for SQL patch.
Radek Brich <radek.brich@devl.cz>
parents: 9
diff changeset
   315
        src = [x.name for x in src_schemas.values() if not x.system and self._test_schema(x.name)]
bb8c729ae6ce PgDiff: add partial support for SQL patch.
Radek Brich <radek.brich@devl.cz>
parents: 9
diff changeset
   316
        dst = [x.name for x in dst_schemas.values() if not x.system and self._test_schema(x.name)]
bb8c729ae6ce PgDiff: add partial support for SQL patch.
Radek Brich <radek.brich@devl.cz>
parents: 9
diff changeset
   317
        for nd in self._diff_names(src, dst):
0
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   318
            sdo = DiffSchema(change=nd[0], schema=nd[1])
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   319
            if nd[0] == '*':
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   320
                src_tables = src_schemas[nd[1]].tables
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   321
                dst_tables = dst_schemas[nd[1]].tables
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   322
                for tdo in self._difftables(nd[1], src_tables, dst_tables):
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   323
                    if sdo:
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   324
                        yield sdo
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   325
                        sdo = None
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   326
                    yield tdo
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   327
            else:
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   328
                yield sdo
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   329
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   330
    def print_diff(self):
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   331
        '''Print diff between src and dst database schema.
53
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   332
0
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   333
        The output is in human readable form.
53
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   334
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   335
        Set allowcolor=True of PgDiff instance to get colored output.
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   336
0
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   337
        '''
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   338
        for ln in self.iter_diff():
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   339
            print(ln.format())
53
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   340
0
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   341
    def print_patch(self):
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   342
        '''Print patch for updating from src schema to dst schema.
53
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   343
0
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   344
        Supports table drop, add, column drop, add and following
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   345
        changes of columns:
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   346
          - type
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   347
          - set/remove not null
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   348
          - default value
53
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   349
0
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   350
        This is experimental, not tested very much.
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   351
        Do not use without checking the commands.
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   352
        Even if it works as intended, it can cause table lock ups
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   353
        and/or loss of data. You have been warned.
53
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   354
0
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   355
        '''
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   356
        for ln in self.iter_diff():
47
bb8c729ae6ce PgDiff: add partial support for SQL patch.
Radek Brich <radek.brich@devl.cz>
parents: 9
diff changeset
   357
            patch = ln.format_patch()
bb8c729ae6ce PgDiff: add partial support for SQL patch.
Radek Brich <radek.brich@devl.cz>
parents: 9
diff changeset
   358
            if patch:
53
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   359
                print('\n'.join(patch))
0
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   360
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   361
    def filter_schemas(self, include=[], exclude=[]):
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   362
        '''Modify list of schemas which are used for computing diff.
53
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   363
0
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   364
        include (list) -- if not empty, consider only these schemas for diff
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   365
        exclude (list) -- exclude these schemas from diff
53
4a049a5af657 Update PgDiff: Support SQL patch for constraints. Fix changes of column default value.
Radek Brich <radek.brich@devl.cz>
parents: 47
diff changeset
   366
0
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   367
        Order: include, exclude
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   368
        include=[] means include everything
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   369
        '''
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   370
        self.include_schemas.clear()
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   371
        self.include_schemas.update(include)
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   372
        self.exclude_schemas.clear()
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   373
        self.exclude_schemas.update(exclude)
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   374
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   375
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   376
    def filter_tables(self, include=[], exclude=[]):
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   377
        self.include_tables.clear()
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   378
        self.include_tables.update(include)
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   379
        self.exclude_tables.clear()
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   380
        self.exclude_tables.update(exclude)
eaae9539e910 Postgres tools.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
   381