VB.NET 2019
邮政 10
Postgre ODBC
DBeaver 中的源数据:
https://i86.fastpic.ru/big/2019/0716/b9/_8741664f3e9495646d995a9d96b846b9.png
尝试更改SQL状态,更改参数传递:
'Dim command As New Odbc.OdbcCommand("UPDATE public.v8users SET Data = @data WHERE ID = @id", Connection) 'MSSQL syntax
'Dim command As New Odbc.OdbcCommand("UPDATE public.v8users SET data = ?, name = ? WHERE id = ?", Connection)
'Dim command As New Odbc.OdbcCommand("UPDATE public.v8users SET data = ?data WHERE id = ?id", Connection) 'MySQL syntax
'Dim command As New Odbc.OdbcCommand("UPDATE public.v8users SET data = ? WHERE id = decode(encode(?, 'hex'), 'hex')", Connection) 'PostgreSQL syntax
'command.Parameters.Add(New Odbc.OdbcParameter("@id", SQLUser.ID))
'command.Parameters.Add(New Odbc.OdbcParameter("@data", NewBytes))
'command.Parameters.Add(New Odbc.OdbcParameter("id", SqlDbType.Binary)).Value = SQLUser.ID
'command.Parameters.Add(New Odbc.OdbcParameter("data", SqlDbType.Binary)).Value = NewBytes
'command.Parameters.Add(New Odbc.OdbcParameter("name", Odbc.OdbcType.Binary)).Value = NewBytes
Structure SQLUser
Dim ID As Byte()
Dim IDStr As String
Dim Name As String
Dim Descr As String
Dim Data As Byte()
Dim DataStr As String
Dim PassHash As String
Dim PassHash2 As String
Dim AdmRole As String
Dim KeySize As Integer
Dim KeyData As Byte()
End Structure
Dim a
Dim Connection = New Odbc.OdbcConnection("Driver={PostgreSQL Unicode};Server=192.168.2.10;Database=TestPurp;Uid=<correct>;Pwd=<correct>;UseServerSidePrepare=1;ReadOnly=0")
Dim command As New Odbc.OdbcCommand("UPDATE public.v8users SET data = ? WHERE id = ?", Connection)
command.Parameters.Clear()
command.Parameters.Add(New Odbc.OdbcParameter("id", Odbc.OdbcType.Binary)).Value = SQLUser.ID
command.Parameters.Add(New Odbc.OdbcParameter("data", Odbc.OdbcType.Binary)).Value = NewBytes
a = command.ExecuteNonQuery()
a = 0,预期 a = 1
尝试按照参数在 Update 语句中显示的顺序添加参数。首先添加数据,然后添加 id。
command.Parameters.Add(New Odbc.OdbcParameter("data", Odbc.OdbcType.Binary)).Value = NewBytes
command.Parameters.Add(New Odbc.OdbcParameter("id", Odbc.OdbcType.Binary)).Value = SQLUser.ID
这与使用 OleDb 提供程序的 Access 的工作方式相同。