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import sys
import random
import string
import re
class Field:
def __init__(self, name, is_nullible):
self.name = name
self.is_nullible = is_nullible
class Field_int(Field):
sizes = [ 1, 2, 3, 4, 8 ]
types = [ "TINYINT", "SMALLINT", "MEDIUMINT", "INT", "BIGINT" ]
uint_ranges = [ (0,(1<<8)-1), (0,(1<<16)-1), (0,(1<<24)-1), (0,(1<<32)-1), (0,(1<<64)-1) ]
int_ranges = [ (-(1<<7), (1<<7)-1), (-(1<<15),(1<<15)-1), (-(1<<23),(1<<23)-1), (-(1<<31),(1<<31)-1), (-(1<<63),(1<<63)-1) ]
def __init__(self, name, size, is_unsigned, is_nullible):
Field.__init__(self, name, is_nullible)
self.idx = Field_int.sizes.index(size)
self.size = size
self.is_unsigned = is_unsigned
def get_type(self):
t = Field_int.types[self.idx]
if self.is_unsigned:
t += " UNSIGNED"
if not self.is_nullible:
t += " NOT NULL"
return t
def get_value(self):
if self.is_unsigned:
r = Field_int.uint_ranges[self.idx]
else:
r = Field_int.int_ranges[self.idx]
return random.randint(r[0],r[1])
def next_field(self):
return Field_int(self.name, Field_int.sizes[random.randint(self.idx,len(Field_int.sizes)-1)], self.is_unsigned, self.is_nullible)
class Field_int_auto_inc(Field_int):
def __init__(self, name, size, is_unsigned, is_nullible):
Field_int.__init__(self, name, size, is_unsigned, is_nullible)
self.next_value = 0
def get_type(self):
return Field_int.get_type(self)
def get_value(self):
v = self.next_value
self.next_value += 1
return v
class Field_char(Field):
types = [ "CHAR", "BINARY" ]
def __init__(self, name, size, is_binary, is_nullible):
Field.__init__(self, name, is_nullible)
assert 0 <= size and size < 256
self.size = size
self.is_binary = is_binary
def get_type(self):
t = "%s(%d)" % (Field_char.types[self.is_binary], self.size)
if not self.is_nullible:
t += " NOT NULL"
return t
def next_size(self):
if self.size < 255:
return self.size + 1
return self.size
def get_value(self):
l = random.randint(1, self.size)
s = ''.join(random.choice(string.ascii_lowercase + string.ascii_uppercase + string.digits) for x in range(l))
return "'%s'" % (s)
def next_field(self):
return Field_char(self.name, self.next_size(), self.is_binary, self.is_nullible)
class Field_varchar(Field):
types = [ "VARCHAR", "VARBINARY" ]
def __init__(self, name, size, is_binary, is_nullible):
Field.__init__(self, name, is_nullible)
assert 0 <= size and size < 64*1024
self.size = size
self.is_binary = is_binary
def get_type(self):
t = "%s(%d)" % (Field_varchar.types[self.is_binary], self.size)
if not self.is_nullible:
t += " NOT NULL"
return t;
def get_value(self):
l = random.randint(1, self.size)
s = ''.join(random.choice(string.ascii_lowercase + string.ascii_uppercase + string.digits) for x in range(l))
return "'%s'" % (s)
def next_size(self):
if self.size < 64*1024:
return self.size + 1
return self.size
def next_field(self):
if self.size < 256:
new_size = 256
else:
new_size = self.size + 1
return Field_varchar(self.name, new_size, self.is_binary, self.is_nullible)
class Field_blob(Field):
types = [ "TINYBLOB", "BLOB", "MEDIUMBLOB", "LONGBLOB" ]
def __init__(self, name, size, is_nullible, idx):
Field.__init__(self, name, is_nullible)
self.size = size
self.idx = idx
def get_type(self):
t = "%s" % (Field_blob.types[self.idx])
if not self.is_nullible:
t += " NOT NULL"
return t
def get_value(self):
l = random.randint(1, self.size)
s = ''.join(random.choice(string.ascii_lowercase + string.ascii_uppercase + string.digits) for x in range(l))
return "'%s'" % (s)
def next_field(self):
self.size += 1
if self.idx < 3:
self.idx += 1
return Field_blob(self.name, self.size, self.is_nullible, self.idx)
def create_fields():
fields = []
fields.append(create_int('a'))
fields.append(create_int('b'))
fields.append(create_char('c'))
fields.append(create_varchar('d'))
fields.append(create_varchar('e'))
fields.append(create_varchar('f'))
fields.append(create_blob('g'))
fields.append(create_blob('h'))
fields.append(Field_int_auto_inc('id', 8, 0, 0))
return fields
def create_int(name):
int_sizes = [ 1, 2, 3, 4, 8]
return Field_int(name, int_sizes[random.randint(0,len(int_sizes)-1)], random.randint(0,1), random.randint(0,1))
def create_char(name):
return Field_char(name, random.randint(1, 100), random.randint(0,1), random.randint(0,1))
def create_varchar(name):
return Field_varchar(name, random.randint(1, 100), random.randint(0,1), random.randint(0,1))
def create_blob(name):
return Field_blob(name, random.randint(1,2), random.randint(0,1), random.randint(0,3))
def create_table(fields, tablename, engine):
if engine == "tokudb":
key_type = "CLUSTERING KEY"
else:
key_type = "KEY"
t = "CREATE TABLE %s (" % (tablename)
for f in fields:
t += "%s %s, " % (f.name, f.get_type())
t += "KEY(b), %s(e), PRIMARY KEY(id)" % (key_type)
t += ") ENGINE=%s;" % (engine)
return t
def insert_row(fields):
t = "INSERT INTO %s VALUES ("
for i in range(len(fields)):
f = fields[i]
t += "%s" % (f.get_value())
if i < len(fields)-1:
t += ","
t += ");"
return t
def header():
print "# generated from change_column_all.py"
print "# test random column change on wide tables"
print "source include/have_tokudb.inc;"
print "--disable_warnings"
print "DROP TABLE IF EXISTS t, ti;"
print "--enable_warnings"
print "SET SESSION TOKUDB_DISABLE_SLOW_ALTER=1;"
print "SET SESSION DEFAULT_STORAGE_ENGINE='TokuDB';"
print
def main():
experiments = 1000
nrows = 10
seed = 0
for arg in sys.argv[1:]:
match = re.match("--(.*)=(.*)", arg)
if match:
exec("%s = %s" % (match.group(1),match.group(2)))
random.seed(seed)
header()
for experiment in range(experiments):
# generate a schema
fields = create_fields()
# create a table with the schema
print create_table(fields, "t", "tokudb")
# insert some rows
for r in range(nrows):
print insert_row(fields) % ('t')
print create_table(fields, "ti", "myisam");
print "INSERT INTO ti SELECT * FROM t;"
# transform table schema and contents
for f in [ 0, 2, 3, 5, 6, 7 ]:
fields[f] = fields[f].next_field()
print "ALTER TABLE t CHANGE COLUMN %s %s %s;" % (fields[f].name, fields[f].name, fields[f].get_type())
print "ALTER TABLE ti CHANGE COLUMN %s %s %s;" % (fields[f].name, fields[f].name, fields[f].get_type())
new_row = insert_row(fields)
print new_row % ('t')
print new_row % ('ti')
# compare tables
print "let $diff_tables = test.t, test.ti;"
print "source include/diff_tables.inc;"
# cleanup
print "DROP TABLE t, ti;"
print
return 0
sys.exit(main())
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