使用占位符在OrientDB中参数化查询

我正在使用pyorient并希望参数化查询——我假设command（）允许占位符，但找不到任何文档。我特别希望按照postgres“%”（name）的构造使用dict（）args，但也可以使元组/列表工作

我用我的

python\u测试

数据库尝试了您的案例：

数据集：

import pyorient 

db_name = 'python_test'
user = 'root'
pwd = 'root'

print("Connecting...")
client = pyorient.OrientDB("localhost",2424)
session_id = client.connect(user, pwd)
print("OK - sessionID: ",session_id,"\n")

if client.db_exists( db_name, pyorient.STORAGE_TYPE_PLOCAL ):
        print("DB "+db_name+" already exists\n")
        client.db_open(db_name, user, pwd, pyorient.DB_TYPE_GRAPH, pyorient.STORAGE_TYPE_PLOCAL)
        name = 'test name'
        surname = 'test surname'
        vertexes = client.command("SELECT FROM TestClass WHERE name = '" + name + "' AND surname = '" + surname + "'")
        for vertex in vertexes:
            print(vertex)
else:
        print("Creating DB "+ db_name + "...")
        client.db_create( db_name, pyorient.DB_TYPE_GRAPH, pyorient.STORAGE_TYPE_PLOCAL )
        print("DB " + db_name + " created\n")

client.db_close()

Connecting...
OK - sessionID:  40 

DB python_test already exists

{'@TestClass':{'surname': 'test surname', 'name': 'test name'},'version':1,'rid':'#12:0'}

我使用了两个参数：

• 名称

  -->

  字符串

• 姓氏

  -->

  字符串

我将它们传递到

命令（）

函数中

PyOrient代码：

import pyorient 

db_name = 'python_test'
user = 'root'
pwd = 'root'

print("Connecting...")
client = pyorient.OrientDB("localhost",2424)
session_id = client.connect(user, pwd)
print("OK - sessionID: ",session_id,"\n")

if client.db_exists( db_name, pyorient.STORAGE_TYPE_PLOCAL ):
        print("DB "+db_name+" already exists\n")
        client.db_open(db_name, user, pwd, pyorient.DB_TYPE_GRAPH, pyorient.STORAGE_TYPE_PLOCAL)
        name = 'test name'
        surname = 'test surname'
        vertexes = client.command("SELECT FROM TestClass WHERE name = '" + name + "' AND surname = '" + surname + "'")
        for vertex in vertexes:
            print(vertex)
else:
        print("Creating DB "+ db_name + "...")
        client.db_create( db_name, pyorient.DB_TYPE_GRAPH, pyorient.STORAGE_TYPE_PLOCAL )
        print("DB " + db_name + " created\n")

client.db_close()

Connecting...
OK - sessionID:  40 

DB python_test already exists

{'@TestClass':{'surname': 'test surname', 'name': 'test name'},'version':1,'rid':'#12:0'}

输出：

import pyorient 

db_name = 'python_test'
user = 'root'
pwd = 'root'

print("Connecting...")
client = pyorient.OrientDB("localhost",2424)
session_id = client.connect(user, pwd)
print("OK - sessionID: ",session_id,"\n")

if client.db_exists( db_name, pyorient.STORAGE_TYPE_PLOCAL ):
        print("DB "+db_name+" already exists\n")
        client.db_open(db_name, user, pwd, pyorient.DB_TYPE_GRAPH, pyorient.STORAGE_TYPE_PLOCAL)
        name = 'test name'
        surname = 'test surname'
        vertexes = client.command("SELECT FROM TestClass WHERE name = '" + name + "' AND surname = '" + surname + "'")
        for vertex in vertexes:
            print(vertex)
else:
        print("Creating DB "+ db_name + "...")
        client.db_create( db_name, pyorient.DB_TYPE_GRAPH, pyorient.STORAGE_TYPE_PLOCAL )
        print("DB " + db_name + " created\n")

client.db_close()

Connecting...
OK - sessionID:  40 

DB python_test already exists

{'@TestClass':{'surname': 'test surname', 'name': 'test name'},'version':1,'rid':'#12:0'}

---

希望它能有所帮助

谢谢数据集，我更喜欢使用驱动程序替换，而不是使用我自己的，因为它将（a）防止注入，（b）可能允许重复使用查询计划。我不想把事情搞得乱七八糟。这并不是在回答最初的问题。