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90e06f53af8c
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text/x-python
Implemented cache-map on main page to save executing select
statements that checks if cache should be invalidated.
It reduces number of executed queries from N which is number of
repos to 1 which is needed to fetch all keys from database.
On pages with large number of repos this could reduce load time by half
statements that checks if cache should be invalidated.
It reduces number of executed queries from N which is number of
repos to 1 which is needed to fetch all keys from database.
On pages with large number of repos this could reduce load time by half
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MySQL database specific implementations of changeset classes.
"""
from sqlalchemy.databases import mysql as sa_base
from sqlalchemy import types as sqltypes
from rhodecode.lib.dbmigrate.migrate import exceptions
from rhodecode.lib.dbmigrate.migrate.changeset import ansisql
MySQLSchemaGenerator = sa_base.MySQLDDLCompiler
class MySQLColumnGenerator(MySQLSchemaGenerator, ansisql.ANSIColumnGenerator):
pass
class MySQLColumnDropper(ansisql.ANSIColumnDropper):
pass
class MySQLSchemaChanger(MySQLSchemaGenerator, ansisql.ANSISchemaChanger):
def visit_column(self, delta):
table = delta.table
colspec = self.get_column_specification(delta.result_column)
if delta.result_column.autoincrement:
primary_keys = [c for c in table.primary_key.columns
if (c.autoincrement and
isinstance(c.type, sqltypes.Integer) and
not c.foreign_keys)]
if primary_keys:
first = primary_keys.pop(0)
if first.name == delta.current_name:
colspec += " AUTO_INCREMENT"
old_col_name = self.preparer.quote(delta.current_name, table.quote)
self.start_alter_table(table)
self.append("CHANGE COLUMN %s " % old_col_name)
self.append(colspec)
self.execute()
def visit_index(self, param):
# If MySQL can do this, I can't find how
raise exceptions.NotSupportedError("MySQL cannot rename indexes")
class MySQLConstraintGenerator(ansisql.ANSIConstraintGenerator):
pass
class MySQLConstraintDropper(MySQLSchemaGenerator, ansisql.ANSIConstraintDropper):
def visit_migrate_check_constraint(self, *p, **k):
raise exceptions.NotSupportedError("MySQL does not support CHECK"
" constraints, use triggers instead.")
class MySQLDialect(ansisql.ANSIDialect):
columngenerator = MySQLColumnGenerator
columndropper = MySQLColumnDropper
schemachanger = MySQLSchemaChanger
constraintgenerator = MySQLConstraintGenerator
constraintdropper = MySQLConstraintDropper
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