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db_actions.py
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db_actions.py
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import json
import hashlib
import datetime as dt
import numpy as np
import pandas as pd
from .potential import Potential
def _write_potential(dbm, potential):
potential_str = json.dumps(potential.as_dict(with_parameters=False), sort_keys=True)
potential_hash = hashlib.md5(potential_str.encode('utf-8')).hexdigest()
result = dbm.connection.execute(
'SELECT id FROM potential WHERE potential.hash = ?',
(potential_hash,)).fetchone()
if result:
return result['id']
cursor = dbm.connection.execute(
'INSERT INTO potential (hash, schema) VALUES (?, ?)',
(potential_hash, potential.as_dict(with_parameters=False))
)
return cursor.lastrowid
def _write_training(dbm, training):
training_str = json.dumps(training.schema, sort_keys=True)
training_hash = hashlib.md5(training_str.encode('utf-8')).hexdigest()
result = dbm.connection.execute(
'SELECT id FROM training WHERE training.hash = ?',
(training_hash,)).fetchone()
if result:
return result['id']
cursor = dbm.connection.execute(
'INSERT INTO training (hash, schema) VALUES (?, ?)',
(training_hash, training.schema)
)
return cursor.lastrowid
def _write_labels(dbm, run_id, labels):
for key, value in labels.items():
result = dbm.connection.execute('''
SELECT id FROM label
WHERE label.key = ? AND label.value = ?
''', (key, value)).fetchone()
if result:
label_id = result['id']
else:
cursor = dbm.connection.execute('''
INSERT INTO label (key, value)
VALUES (?, ?)
''', (key, value))
label_id = cursor.lastrowid
cursor = dbm.connection.execute('''
INSERT INTO run_label (run_id, label_id)
VALUES (?, ?)
''', (run_id, label_id))
def write_run_initial(dbm, potential, training, configuration):
with dbm.connection:
potential_id = _write_potential(dbm, potential)
training_id = _write_training(dbm, training)
cursor = dbm.connection.execute('''
INSERT INTO run (name, potential_id, training_id, configuration, start_time, initial_parameters, indicies, bounds)
VALUES (?, ?, ?, ?, ?, ?, ?, ?)
''', (
configuration.run_name,
potential_id,
training_id,
configuration.schema,
dt.datetime.utcnow(),
potential.parameters.tolist(),
potential.optimization_parameter_indicies.tolist(),
potential.optimization_bounds.tolist()
))
run_id = cursor.lastrowid
_write_labels(dbm, run_id, configuration.run_labels)
return potential_id, run_id
def write_run_final(dbm, run_id):
with dbm.connection:
cursor = dbm.connection.execute('''
UPDATE run SET end_time = ?
WHERE id = ? AND end_time IS NULL
''', (dt.datetime.utcnow(), run_id))
def write_evaluation(dbm, run_id, potential, result):
with dbm.connection:
errors = (
result['parts']['forces'],
result['parts']['stress'],
result['parts']['energy'])
if 'weights' in result:
weights = (
result['weights']['forces'],
result['weights']['stress'],
result['weights']['energy']
)
else:
weights = (0, 0, 0)
cursor = dbm.connection.execute('''
INSERT INTO evaluation (run_id, parameters, sq_force_error, sq_stress_error, sq_energy_error, w_f, w_s, w_e)
VALUES (?, ?, ?, ?, ?, ?, ?, ?)
''', (run_id, potential.optimization_parameters.tolist(),
*errors, *weights))
def filter_evaluations(dbm, potential=None, limit=10, condition='best', run_id=None, labels=None):
"""Select a subset of evaluations. Currently only works on single
objective functions because "best" and "worst" are subjective in
multiobjecive functions.
Arguments:
- condition (str): best, random, worst
THIS IS THE REASON TO USE SQLALCHEMY QUERY BUILDER.... I HAVE LEARNED NOW
"""
query = '''
SELECT run.id
FROM run {join_sql}
WHERE {where_sql}
'''
join_statement = []
where_statement = ['1=1']
query_arguments = []
if labels:
join_statement.extend([
'JOIN run_label ON run.id = run_label.run_id',
'JOIN label ON run_label.label_id = label.id'
])
select_labels = []
for key, value in labels.items():
if not isinstance(key, str) or not isinstance(value, str):
raise ValueError(f'key: {key} values: {values} for label must be strings')
select_labels.append('(label.key = ? AND label.value = ?)')
query_arguments.extend([key, value])
where_statement.append(' OR '.join(select_labels))
query += f"""
GROUP BY run.id
HAVING count = {len(labels)}
"""
if run_id is not None:
if not isinstance(run_id, int):
raise ValueError('run_id must be integer')
where_statement.append('run.id = ?')
query_arguments.append(run_id)
if potential:
potential_str = json.dumps(potential.as_dict(with_parameters=False), sort_keys=True)
potential_hash = hashlib.md5(potential_str.encode('utf-8')).hexdigest()
join_statement.append('JOIN potential ON run.potential_id = potential.id')
where_statement.append('potential.hash = ?')
query_arguments.append(potential_hash)
# find all run ids that match selection
query = query.format(join_sql=' '.join(join_statement),
where_sql=' AND '.join(where_statement))
run_ids = [row['id'] for row in dbm.connection.execute(query, query_arguments)]
if condition == 'best':
order_sql = 'score ASC'
elif condition == 'worst':
order_sql = 'score DESC'
elif condition == 'random':
order_sql = 'RANDOM()'
else:
raise ValueError('condition ordering not supported')
# pick subset of potentials
query = f'''
SELECT e.id, e.parameters, (e.w_f * e.sq_force_error + e.w_s * e.sq_stress_error + e.w_e * e.sq_energy_error) AS score FROM evaluation e
WHERE {' OR '.join(['e.run_id = ?' for _ in run_ids])}
ORDER BY {order_sql}
LIMIT {limit}
'''
return dbm.connection.execute(query, run_ids)
def filter_potentials(dbm, potential=None, limit=10, condition='best', run_id=None, labels=None):
results = []
for row in filter_evaluations(dbm, potential, limit, condition, run_id, labels):
results.append({'potential': select_potential_from_evaluation(dbm, row['id']), 'score': row['score']})
return results
def select_potential_from_evaluation(dbm, evaluation_id):
result = dbm.connection.execute('''
SELECT potential.schema, parameters, initial_parameters, indicies, bounds
FROM evaluation
JOIN run ON run.id = evaluation.run_id
JOIN potential ON potential.id = run.potential_id
WHERE evaluation.id = ?
''', (evaluation_id,)).fetchone()
if result is None:
raise ValueError(f'evaluation_id {evaluation_id} does not exist')
return Potential.from_run_evaluation(
result['schema'],
result['initial_parameters'],
result['indicies'], result['parameters'], result['bounds'])
def copy_database_to_database(src_dbm, dest_dbm, only_unique=False):
SELECT_RUNS = 'SELECT id FROM run'
SELECT_RUN = 'SELECT id, name, potential_id, training_id, configuration, start_time, end_time, initial_parameters, indicies, bounds FROM run WHERE id = ?'
SELECT_RUN_LABELS = 'SELECT label.key, label.value FROM run_label JOIN label ON run_label.label_id = label.id WHERE run_label.run_id = ?'
SELECT_RUN_POTENTIAL = 'SELECT potential.hash, potential.schema FROM potential JOIN run ON run.potential_id = potential.id WHERE run.id = ?'
SELECT_RUN_TRAINING = 'SELECT training.hash, training.schema FROM training JOIN run ON run.potential_id = training.id WHERE run.id = ?'
SELECT_RUN_EVALUATION_COUNT = 'SELECT count(*) as num_evaluations FROM evaluation WHERE run_id = ?'
SELECT_RUN_EVALUATION = '''
SELECT parameters, sq_force_error, sq_stress_error, sq_energy_error, w_f, w_s, w_e FROM evaluation
WHERE run_id = ? ORDER BY id LIMIT ? OFFSET ?
'''
UNIQUE_RUN_POTENTIAL = 'SELECT id, hash FROM potential WHERE potential.hash = ?'
UNIQUE_RUN_TRAINING = 'SELECT id, hash FROM training WHERE training.hash = ?'
UNIQUE_RUN = '''
SELECT run.id FROM run
JOIN potential ON potential.id = run.potential_id
JOIN training ON training.id = run.training_id
WHERE name = ? AND potential.hash = ? AND training.hash = ? AND configuration = ?
AND start_time = ? AND (end_time = ? OR end_time IS NULL AND ? is NULL)
AND initial_parameters = ? AND indicies = ? AND bounds = ?
'''
INSERT_RUN_POTENTIAL = 'INSERT INTO potential (hash, schema) VALUES (?, ?)'
INSERT_RUN_TRAINING = 'INSERT INTO training (hash, schema) VALUES (?, ?)'
INSERT_RUN = 'INSERT INTO run (name, potential_id, training_id, configuration, start_time, end_time, initial_parameters, indicies, bounds) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)'
INSERT_RUN_EVALUATION = 'INSERT INTO evaluation (run_id, parameters, sq_force_error, sq_stress_error, sq_energy_error, w_f, w_s, w_e) VALUES (?, ?, ?, ?, ?, ?, ?, ?)'
for run in src_dbm.connection.execute(SELECT_RUNS):
# Potential
query_result = src_dbm.connection.execute(SELECT_RUN_POTENTIAL, (run['id'],)).fetchone()
potential_hash = query_result['hash']
query = dest_dbm.connection.execute(UNIQUE_RUN_POTENTIAL, (potential_hash,)).fetchone()
if query:
potential_id = query['id']
else:
with dest_dbm.connection:
cursor = dest_dbm.connection.execute(INSERT_RUN_POTENTIAL, (query_result['hash'], query_result['schema']))
potential_id = cursor.lastrowid
# Training
query_result = src_dbm.connection.execute(SELECT_RUN_TRAINING, (run['id'],)).fetchone()
training_hash = query_result['hash']
query = dest_dbm.connection.execute(UNIQUE_RUN_TRAINING, (training_hash,)).fetchone()
if query:
training_id = query['id']
else:
with dest_dbm.connection:
cursor = dest_dbm.connection.execute(INSERT_RUN_TRAINING, (query_result['hash'], query_result['schema']))
training_id = cursor.lastrowid
# Run
query_result = src_dbm.connection.execute(SELECT_RUN, (run['id'],)).fetchone()
query = dest_dbm.connection.execute(UNIQUE_RUN, (
query_result['name'], potential_hash, training_hash, query_result['configuration'],
query_result['start_time'], query_result['end_time'], query_result['end_time'],
query_result['initial_parameters'], query_result['indicies'], query_result['bounds'])).fetchone()
if query and only_unique:
run_id = query['id']
else:
with dest_dbm.connection:
cursor = dest_dbm.connection.execute(INSERT_RUN, (
query_result['name'], potential_id, training_id, query_result['configuration'],
query_result['start_time'], query_result['end_time'],
query_result['initial_parameters'], query_result['indicies'], query_result['bounds']))
run_id = cursor.lastrowid
# Evaluation
num_evaluations = src_dbm.connection.execute(SELECT_RUN_EVALUATION_COUNT, (run['id'],)).fetchone()['num_evaluations']
print(' adding run %d with %d evaluations' % (run['id'], num_evaluations))
evaluation_limit = 1000
for offset in range(0, num_evaluations, evaluation_limit):
cursor = src_dbm.connection.execute(SELECT_RUN_EVALUATION, (run['id'], evaluation_limit, offset))
evaluations = [(run_id, row['parameters'], row['sq_force_error'], row['sq_stress_error'], row['sq_energy_error'], row['w_f'], row['w_s'], row['w_e']) for row in cursor]
with dest_dbm.connection:
dest_dbm.connection.executemany(INSERT_RUN_EVALUATION, evaluations)
# labels
labels = {row['key']: row['value'] for row in src_dbm.connection.execute(SELECT_RUN_LABELS, (run['id'],))}
with dest_dbm.connection:
_write_labels(dest_dbm, run_id, labels)
def list_runs(dbm):
SELECT_RUNS = 'SELECT id FROM run'
return [row['id'] for row in dbm.connection.execute(SELECT_RUNS)]
def list_evaluations(dbm, run_id):
SELECT_EVALUATIONS = f'SELECT sq_force_error, sq_stress_error, sq_energy_error, w_f, w_s, w_e FROM evaluation WHERE run_id = {run_id}'
df = pd.read_sql(SELECT_EVALUATIONS, dbm.connection)
df['score'] = df['w_f'] * df['sq_force_error'] + df['w_s'] * df['sq_stress_error'] + df['w_e'] * df['sq_energy_error']
return df
def run_summary(dbm, run_id):
SELECT_RUN = 'SELECT id, name, potential_id, training_id, configuration, start_time, end_time, initial_parameters, indicies, bounds FROM run WHERE id = ?'
SELECT_RUN_NUM_EVALUATIONS = 'SELECT count(*) FROM evaluation WHERE run_id = ?'
SELECT_RUN_LAST_EVALUATIONS = '''
SELECT (e.w_f * e.sq_force_error + e.w_s * e.sq_stress_error + e.w_e * e.sq_energy_error) AS score FROM evaluation e
WHERE run_id = ?
ORDER BY e.id DESC LIMIT 100
'''
run = dbm.connection.execute(SELECT_RUN, (run_id,)).fetchone()
run_summary = {
'algorithm': run['configuration']['spec']['algorithm']['name'],
'initial_parameters': run['initial_parameters'],
}
num_evaluations = dbm.connection.execute(SELECT_RUN_NUM_EVALUATIONS, (run_id,)).fetchone()[0]
run_summary.update({
'steps': num_evaluations
})
last_scores = [row['score'] for row in dbm.connection.execute(SELECT_RUN_LAST_EVALUATIONS, (run_id,))]
if last_scores:
run_summary.update({
'stats': {'mean': np.mean(last_scores), 'median': np.median(last_scores), 'min': np.min(last_scores)}
})
min_score = filter_evaluations(dbm, run_id=run_id, condition='best', limit=1).fetchone()
run_summary.update({
'final_parameters': min_score['parameters'],
'min_score': min_score['score']
})
else:
run_summary.update({
'stats': {'mean': 0.0, 'median': 0.0, 'min': 0.0},
'final_parameters': [],
'min_score': 0.0
})
return run_summary