2017-05-10 17:30:36 +02:00
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import sqlite3
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import os
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import logging
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log = logging.getLogger(__name__)
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2019-01-21 21:55:50 +01:00
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def do_migration(conf):
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2017-05-10 17:30:36 +02:00
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log.info("Doing the migration")
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2019-01-21 21:55:50 +01:00
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migrate_blockchainname_db(conf.data_dir)
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2017-05-10 17:30:36 +02:00
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log.info("Migration succeeded")
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def migrate_blockchainname_db(db_dir):
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blockchainname_db = os.path.join(db_dir, "blockchainname.db")
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# skip migration on fresh installs
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if not os.path.isfile(blockchainname_db):
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return
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db_file = sqlite3.connect(blockchainname_db)
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file_cursor = db_file.cursor()
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tables = file_cursor.execute("SELECT tbl_name FROM sqlite_master "
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"WHERE type='table'").fetchall()
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if 'tmp_name_metadata_table' in tables and 'name_metadata' not in tables:
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file_cursor.execute("ALTER TABLE tmp_name_metadata_table RENAME TO name_metadata")
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else:
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file_cursor.executescript(
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"CREATE TABLE IF NOT EXISTS tmp_name_metadata_table "
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" (name TEXT UNIQUE NOT NULL, "
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" txid TEXT NOT NULL, "
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" n INTEGER NOT NULL, "
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" sd_hash TEXT NOT NULL); "
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"INSERT OR IGNORE INTO tmp_name_metadata_table "
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" (name, txid, n, sd_hash) "
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" SELECT name, txid, n, sd_hash FROM name_metadata; "
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"DROP TABLE name_metadata; "
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"ALTER TABLE tmp_name_metadata_table RENAME TO name_metadata;"
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)
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db_file.commit()
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db_file.close()
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