author | Adrien Di Mascio <Adrien.DiMascio@logilab.fr> |
Mon, 09 Aug 2010 18:48:32 +0200 | |
branch | stable |
changeset 6080 | d0cb8fde4957 |
parent 5832 | 16a4235e031f |
child 9460 | a2a0bc984863 |
permissions | -rw-r--r-- |
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Had thought this could be done in cube, but it really needs to be done earlier in the migration process
Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents:
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1 |
def migrate_varchar_to_nvarchar(): |
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Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents:
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dbdriver = config.sources()['system']['db-driver'] |
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Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents:
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if dbdriver != "sqlserver2005": |
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Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents:
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return |
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Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents:
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5 |
|
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Had thought this could be done in cube, but it really needs to be done earlier in the migration process
Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents:
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introspection_sql = """\ |
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Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents:
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SELECT table_schema, table_name, column_name, is_nullable, character_maximum_length |
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parents:
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FROM information_schema.columns |
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parents:
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WHERE data_type = 'VARCHAR' and table_name <> 'SYSDIAGRAMS' |
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Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents:
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10 |
""" |
561014b6d70a
Had thought this could be done in cube, but it really needs to be done earlier in the migration process
Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents:
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has_index_sql = """\ |
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Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents:
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SELECT i.name AS index_name, |
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parents:
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i.type_desc, |
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i.is_unique, |
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parents:
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i.is_unique_constraint |
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FROM sys.indexes AS i, sys.index_columns as j, sys.columns as k |
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WHERE is_hypothetical = 0 AND i.index_id <> 0 |
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AND i.object_id = j.object_id |
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parents:
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AND i.index_id = j.index_id |
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AND i.object_id = OBJECT_ID('%(table)s') |
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AND k.name = '%(col)s' |
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AND k.object_id=i.object_id |
561014b6d70a
Had thought this could be done in cube, but it really needs to be done earlier in the migration process
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AND j.column_id = k.column_id;""" |
561014b6d70a
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|
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generated_statements = [] |
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Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents:
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for schema, table, column, is_nullable, length in sql(introspection_sql, ask_confirm=False): |
561014b6d70a
Had thought this could be done in cube, but it really needs to be done earlier in the migration process
Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents:
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qualified_table = '[%s].[%s]' % (schema, table) |
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rset = sql(has_index_sql % {'table': qualified_table, 'col':column}, |
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Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents:
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ask_confirm = False) |
561014b6d70a
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Alexandre Fayolle <alexandre.fayolle@logilab.fr>
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drops = [] |
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Alexandre Fayolle <alexandre.fayolle@logilab.fr>
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creates = [] |
561014b6d70a
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Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents:
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for idx_name, idx_type, idx_unique, is_unique_constraint in rset: |
561014b6d70a
Had thought this could be done in cube, but it really needs to be done earlier in the migration process
Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents:
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if is_unique_constraint: |
561014b6d70a
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Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents:
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drops.append('ALTER TABLE %s DROP CONSTRAINT %s' % (qualified_table, idx_name)) |
561014b6d70a
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Alexandre Fayolle <alexandre.fayolle@logilab.fr>
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creates.append('ALTER TABLE %s ADD CONSTRAINT %s UNIQUE (%s)' % (qualified_table, idx_name, column)) |
561014b6d70a
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parents:
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else: |
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drops.append('DROP INDEX %s ON %s' % (idx_name, qualified_table)) |
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parents:
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if idx_unique: |
561014b6d70a
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Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents:
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unique = 'UNIQUE' |
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parents:
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else: |
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parents:
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unique = '' |
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creates.append('CREATE %s %s INDEX %s ON %s(%s)' % (unique, idx_type, idx_name, qualified_table, column)) |
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if length == -1: |
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length = 'max' |
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if is_nullable == 'YES': |
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parents:
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not_null = 'NULL' |
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else: |
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parents:
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not_null = 'NOT NULL' |
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parents:
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alter_sql = 'ALTER TABLE %s ALTER COLUMN %s NVARCHAR(%s) %s' % (qualified_table, column, length, not_null) |
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Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents:
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generated_statements+= drops + [alter_sql] + creates |
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|
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parents:
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|
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Had thought this could be done in cube, but it really needs to be done earlier in the migration process
Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents:
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for statement in generated_statements: |
561014b6d70a
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Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents:
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print statement |
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parents:
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sql(statement, ask_confirm=False) |
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parents:
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commit() |
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58 |
|
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Had thought this could be done in cube, but it really needs to be done earlier in the migration process
Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents:
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migrate_varchar_to_nvarchar() |