40 lines
1.4 KiB
Python
40 lines
1.4 KiB
Python
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#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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from neo4j.v1 import GraphDatabase, basic_auth
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driver = GraphDatabase.driver("bolt://localhost:7687",
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auth=basic_auth("", ""),
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encrypted=False)
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query_template = 'CREATE (n {name:"%s"})'
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template_size = len(query_template) - 2 # because of %s
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min_len = 1
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max_len = 1000000
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# binary search because we have to find the maximum size (in number of chars)
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# of a query that can be executed via driver
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while True:
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assert min_len > 0 and max_len > 0, \
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"The lengths have to be positive values! If this happens something" \
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" is terrible wrong with min & max lengths OR the database" \
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" isn't available."
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property_size = (max_len + min_len) // 2
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try:
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driver.session().run(query_template % ("a" * property_size)).consume()
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if min_len == max_len or property_size + 1 > max_len:
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break
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min_len = property_size + 1
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except Exception as e:
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print("Query size %s is too big!" % (template_size + property_size))
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max_len = property_size - 1
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assert property_size == max_len, "max_len probably has to be increased!"
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print("\nThe max length of a query from Python driver is: %s\n" %
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(template_size + property_size))
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# sessions are not closed bacause all sessions that are
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# executed with wrong query size might be broken
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driver.close()
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