sqlite3_column_value()的返回对象是一个unprotected sqlite3_value对象.一个不受保护的sqlite3_value object可能只能用于sqlite3_bind_value()和sqlite3_result_value().如果一个unprotected sqlite3_value对象(sqlite3_column_value()函数的返回值) 被用在其他地方,包括调用如sqlite3_value_int(),sqlite3_value_...
sqlite3_column_value()的返回对象是一个unprotected sqlite3_value对象.一个不受保护的sqlite3_value object可能只能用于sqlite3_bind_value()和sqlite3_result_value().如果一个unprotected sqlite3_value对象(sqlite3_column_value()函数的返回值) 被用在其他地方,包括调用如sqlite3_value_int(),sqlite3_value_...
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sqlalchemy.exc.OperationalError: (sqlite3.OperationalError) Cannot add a NOT NULL column with default value NULL [SQL: u'ALTER TABLE address_scopes ADD COLUMN ip_version INTEGER NOT NULL'] 解决方式: 因为我们自己创建了mysql,需要屏蔽自带的sqlite ...
import sqlite3 db_path = "/Users/mbp2013/Library/Mobile Documents/com~apple~CloudDocs/Documents/Code/xml_echo_script/echo_db.db" conn = sqlite3.connect(db_path) db = conn.cursor() variable = "whatever" db.execute("ALTER TABLE echo ADD COLUMN ?", (variable)) However, I keep getting...
class AddDivisionIdToProfile < ActiveRecord::Migration def self.up add_column :profiles, :division_id, :integer, :null => false end def self.down remove_column :profiles, :division_id end end Error Message SQLite3::SQLException: Cannot add a NOT NULL column with default value NU...
sqlalchemy.exc.OperationalError: (sqlite3.OperationalError) Cannot add a NOT NULL column with default value NULL [SQL: u'ALTER TABLE address_scopes ADD COLUMN ip_version INTEGER NOT NULL'] 解决方式: 因为我们自己创建了mysql,需要屏蔽自带的sqlite ...