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Current Path : /proc/3/root/usr/lib64/python2.6/sqlite3/
Current File : //proc/3/root/usr/lib64/python2.6/sqlite3/dump.py
# Mimic the sqlite3 console shell's .dump command
# Author: Paul Kippes <kippesp@gmail.com>

def _iterdump(connection):
    """
    Returns an iterator to the dump of the database in an SQL text format.

    Used to produce an SQL dump of the database.  Useful to save an in-memory
    database for later restoration.  This function should not be called
    directly but instead called from the Connection method, iterdump().
    """

    cu = connection.cursor()
    yield('BEGIN TRANSACTION;')

    # sqlite_master table contains the SQL CREATE statements for the database.
    q = """
        SELECT name, type, sql
        FROM sqlite_master
            WHERE sql NOT NULL AND
            type == 'table'
        """
    schema_res = cu.execute(q)
    for table_name, type, sql in schema_res.fetchall():
        if table_name == 'sqlite_sequence':
            yield('DELETE FROM sqlite_sequence;')
        elif table_name == 'sqlite_stat1':
            yield('ANALYZE sqlite_master;')
        elif table_name.startswith('sqlite_'):
            continue
        # NOTE: Virtual table support not implemented
        #elif sql.startswith('CREATE VIRTUAL TABLE'):
        #    qtable = table_name.replace("'", "''")
        #    yield("INSERT INTO sqlite_master(type,name,tbl_name,rootpage,sql)"\
        #        "VALUES('table','%s','%s',0,'%s');" %
        #        qtable,
        #        qtable,
        #        sql.replace("''"))
        else:
            yield('%s;' % sql)

        # Build the insert statement for each row of the current table
        res = cu.execute("PRAGMA table_info('%s')" % table_name)
        column_names = [str(table_info[1]) for table_info in res.fetchall()]
        q = "SELECT 'INSERT INTO \"%(tbl_name)s\" VALUES("
        q += ",".join(["'||quote(" + col + ")||'" for col in column_names])
        q += ")' FROM '%(tbl_name)s'"
        query_res = cu.execute(q % {'tbl_name': table_name})
        for row in query_res:
            yield("%s;" % row[0])

    # Now when the type is 'index', 'trigger', or 'view'
    q = """
        SELECT name, type, sql
        FROM sqlite_master
            WHERE sql NOT NULL AND
            type IN ('index', 'trigger', 'view')
        """
    schema_res = cu.execute(q)
    for name, type, sql in schema_res.fetchall():
        yield('%s;' % sql)

    yield('COMMIT;')
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