Question

我正在尝试使用Python SQLAlchemy将MS SQL Server视图反映到SQLite表中。

问题是sqlalchemy将COLLATE“ SQL_Latin1_General_CP1_CI_AS”添加到各种NVARCHAR列，而sqlite不支持。

是否存在从表定义中删除所有COLLATES的与列名无关的方法？

int limit = 15;
for(int i = 1; i < limit; i++) {
    String textView = "setting" + i;
    if(holder.textView.getLineCount() == 0) {
        holder.textView.setVisibility(View.GONE);
    }
}

我收到以下错误：

from sqlalchemy import *
from sqlalchemy.orm import create_session
from sqlalchemy.ext.declarative import declarative_base
import urllib
from sqlalchemy.orm import sessionmaker

#Create and engine and get the metadata
Base = declarative_base()
source_connection = 'msql+pyodbc...'
source_engine = create_engine(source_connection)
metadata = MetaData(bind=source_engine)
SourceSession = sessionmaker(source_engine)

#destination
dest_engine = create_engine('sqlite:///...', echo=True)
DestSession = sessionmaker(dest_engine)


#Reflect each database table we need to use, using metadata
class tblR(Base):
    __table__ = Table('tblR', metadata, 
                      Column("r_id", Integer, primary_key=True),
                      autoload=True)


#Create a session to use the tables    


# This is the query we want to persist in a new table:
sourceSession = SourceSession()
query= sourceSession.query(tblR.r_id, tblR.MK_Assumed).filter_by(r_id=0)


# Build the schema for the new table
# based on the columns that will be returned 
# by the query:
metadata = MetaData(bind=dest_engine)
columns = [Column(desc['name'], desc['type']) for desc in query.column_descriptions]
column_names = [desc['name'] for desc in query.column_descriptions]
table = Table("newtable", metadata, *columns)


# Create the new table in the destination database
table.create(dest_engine)

# Finally execute the query
destSession = DestSession()
for row in query:
    destSession.execute(table.insert(row))
destSession.commit()

Answer 1

我遇到了类似的问题，这就是我解决它的方法：

for table in metadata.sorted_tables :
    for col in table.c:
        if getattr(col.type, 'collation', None) is not None:
            col.type.collation = None

编辑：为了获得更明确的控制，您似乎可以指定'BINARY'，'NOCASE'或'RTRIM'

sqlite.org > datatypes > collations

反映SQL Server表时删除排序规则表达式

1 个答案: