Oracle ODP.NET调用带有参数的包过程时出现问题_.net_Oracle_Oracle10g_Odp.net_Oracle9i

Oracle ODP.NET调用带有参数的包过程时出现问题

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Oracle ODP.NET调用带有参数的包过程时出现问题,.net,oracle,oracle10g,odp.net,oracle9i,.net,Oracle,Oracle10g,Odp.net,Oracle9i,问题：尝试调用打包存储过程，但根据参数的值，调用失败 ORA-06502: PL/SQL: numeric or value error ORA-06512: at line 1 程序定义： procedure DUP_EXACT ( SSN in VARCHAR2, LASTNAME in VARCHAR2, FIRSTNAME in VARCHAR2, MASTERRECORD IN VARCHAR2 DEFAULT NULL, C_Tabl

问题： 尝试调用打包存储过程，但根据参数的值，调用失败

ORA-06502: PL/SQL: numeric or value error
ORA-06512: at line 1

程序定义：

procedure DUP_EXACT (
    SSN in VARCHAR2, 
    LASTNAME in VARCHAR2, 
    FIRSTNAME in VARCHAR2, 
    MASTERRECORD IN VARCHAR2 DEFAULT NULL,
    C_Table out sp_cursor)

    For Each SearchParameter In SearchParameters
        ValueParameter = New OracleParameter

        ValueParameter.Direction = ParameterDirection.Input
        ValueParameter.OracleDbType = OracleDbType.Varchar2
        ValueParameter.ParameterName = SearchParameter.ParameterFieldName

        If Not SearchParameter.TransformedFieldValue = Nothing Then
            ValueParameter.Value = SearchParameter.TransformedFieldValue
        Else
            ValueParameter.Value = String.Empty
        End If

        ExactMatchSearchParameters.Add(ValueParameter)
    Next

    Dim MasterRecordParameter As New OracleParameter()

    MasterRecordParameter.Direction = ParameterDirection.Input
    MasterRecordParameter.OracleDbType = OracleDbType.Varchar2
    MasterRecordParameter.ParameterName = "MASTERRECORD"
    MasterRecordParameter.Value = DBNull.Value

    ExactMatchSearchParameters.Add(MasterRecordParameter)

    Dim TableParameter As New OracleParameter

    TableParameter.ParameterName = "C_Table"
    TableParameter.OracleDbType = OracleDbType.RefCursor
    TableParameter.Direction = ParameterDirection.Output

    ExactMatchSearchParameters.Add(TableParameter)

Using Command As OracleCommand = 
        New OracleCommand(
            QualifiedProcedureName, 
            Me.Database.Connection)

    Command.CommandType = CommandType.StoredProcedure
    'Command.AddToStatementCache = False '

    For Each Parameter In Parameters
        Command.Parameters.Add(Parameter)
    Next

    Command.Connection.Open()

    'Command.Connection.FlushCache() '

    Using Reader As OracleDataReader = Command.ExecuteReader()

*** SUCCESS ***
[SSN]: "6#######0"
[LASTNAME]: "W_____x"
[FIRSTNAME]: "D______e"
[MASTERRECORD]: ""
[C_Table]: ""

*** FAILURE ***
[SSN]: "2#######_1"
[LASTNAME]: "C____n"
[FIRSTNAME]: "L___e"
[MASTERRECORD]: ""
[C_Table]: ""

*** FAILURE ***
[SSN]: "5#######5"
[LASTNAME]: "C_______s"
[FIRSTNAME]: "R_____o"
[MASTERRECORD]: ""
[C_Table]: ""

*** SUCCESS ***
[SSN]: "6#######0"
[LASTNAME]: "P___a"
[FIRSTNAME]: "N______r"
[MASTERRECORD]: ""
[C_Table]: ""

?Command.Parameters(0)
{SSN}
    ArrayBindSize: Nothing
    ArrayBindStatus: Nothing
    CollectionType: None {0}
    DbType: String {16}
    Direction: Input {1}
    InvalidPrecision: 100
    InvalidScale: 129
    InvalidSize: -1
    IsNullable: False
    m_bOracleDbTypeExSet: False
    m_bReturnDateTimeOffset: False
    m_collRef: {Oracle.DataAccess.Client.OracleParameterCollection}
    m_commandText: ""
    m_direction: Input {1}
    m_disposed: False
    m_enumType: ORADBTYPE {4}
    m_modified: False
    m_oraDbType: Varchar2 {126}
    m_paramName: "SSN"
    m_paramPosOrName: ""
    m_saveValue: Nothing
    MaxScale: 127
    MinScale: -84
    Offset: 0
    OracleDbType: Varchar2 {126}
    OracleDbTypeEx: Varchar2 {126}
    ParameterEnumType: ORADBTYPE {4}
    ParameterName: "SSN"
    Precision: 0
    Scale: 0
    Size: 0
    SourceColumn: ""
    SourceColumnNullMapping: False
    SourceVersion: Current {512}
    Status: Success {0}
    UdtTypeName: ""
    Value: "4#######0" {String}

参数创建：

procedure DUP_EXACT (
    SSN in VARCHAR2, 
    LASTNAME in VARCHAR2, 
    FIRSTNAME in VARCHAR2, 
    MASTERRECORD IN VARCHAR2 DEFAULT NULL,
    C_Table out sp_cursor)

    For Each SearchParameter In SearchParameters
        ValueParameter = New OracleParameter

        ValueParameter.Direction = ParameterDirection.Input
        ValueParameter.OracleDbType = OracleDbType.Varchar2
        ValueParameter.ParameterName = SearchParameter.ParameterFieldName

        If Not SearchParameter.TransformedFieldValue = Nothing Then
            ValueParameter.Value = SearchParameter.TransformedFieldValue
        Else
            ValueParameter.Value = String.Empty
        End If

        ExactMatchSearchParameters.Add(ValueParameter)
    Next

    Dim MasterRecordParameter As New OracleParameter()

    MasterRecordParameter.Direction = ParameterDirection.Input
    MasterRecordParameter.OracleDbType = OracleDbType.Varchar2
    MasterRecordParameter.ParameterName = "MASTERRECORD"
    MasterRecordParameter.Value = DBNull.Value

    ExactMatchSearchParameters.Add(MasterRecordParameter)

    Dim TableParameter As New OracleParameter

    TableParameter.ParameterName = "C_Table"
    TableParameter.OracleDbType = OracleDbType.RefCursor
    TableParameter.Direction = ParameterDirection.Output

    ExactMatchSearchParameters.Add(TableParameter)

Using Command As OracleCommand = 
        New OracleCommand(
            QualifiedProcedureName, 
            Me.Database.Connection)

    Command.CommandType = CommandType.StoredProcedure
    'Command.AddToStatementCache = False '

    For Each Parameter In Parameters
        Command.Parameters.Add(Parameter)
    Next

    Command.Connection.Open()

    'Command.Connection.FlushCache() '

    Using Reader As OracleDataReader = Command.ExecuteReader()

*** SUCCESS ***
[SSN]: "6#######0"
[LASTNAME]: "W_____x"
[FIRSTNAME]: "D______e"
[MASTERRECORD]: ""
[C_Table]: ""

*** FAILURE ***
[SSN]: "2#######_1"
[LASTNAME]: "C____n"
[FIRSTNAME]: "L___e"
[MASTERRECORD]: ""
[C_Table]: ""

*** FAILURE ***
[SSN]: "5#######5"
[LASTNAME]: "C_______s"
[FIRSTNAME]: "R_____o"
[MASTERRECORD]: ""
[C_Table]: ""

*** SUCCESS ***
[SSN]: "6#######0"
[LASTNAME]: "P___a"
[FIRSTNAME]: "N______r"
[MASTERRECORD]: ""
[C_Table]: ""

?Command.Parameters(0)
{SSN}
    ArrayBindSize: Nothing
    ArrayBindStatus: Nothing
    CollectionType: None {0}
    DbType: String {16}
    Direction: Input {1}
    InvalidPrecision: 100
    InvalidScale: 129
    InvalidSize: -1
    IsNullable: False
    m_bOracleDbTypeExSet: False
    m_bReturnDateTimeOffset: False
    m_collRef: {Oracle.DataAccess.Client.OracleParameterCollection}
    m_commandText: ""
    m_direction: Input {1}
    m_disposed: False
    m_enumType: ORADBTYPE {4}
    m_modified: False
    m_oraDbType: Varchar2 {126}
    m_paramName: "SSN"
    m_paramPosOrName: ""
    m_saveValue: Nothing
    MaxScale: 127
    MinScale: -84
    Offset: 0
    OracleDbType: Varchar2 {126}
    OracleDbTypeEx: Varchar2 {126}
    ParameterEnumType: ORADBTYPE {4}
    ParameterName: "SSN"
    Precision: 0
    Scale: 0
    Size: 0
    SourceColumn: ""
    SourceColumnNullMapping: False
    SourceVersion: Current {512}
    Status: Success {0}
    UdtTypeName: ""
    Value: "4#######0" {String}

执行：

procedure DUP_EXACT (
    SSN in VARCHAR2, 
    LASTNAME in VARCHAR2, 
    FIRSTNAME in VARCHAR2, 
    MASTERRECORD IN VARCHAR2 DEFAULT NULL,
    C_Table out sp_cursor)

    For Each SearchParameter In SearchParameters
        ValueParameter = New OracleParameter

        ValueParameter.Direction = ParameterDirection.Input
        ValueParameter.OracleDbType = OracleDbType.Varchar2
        ValueParameter.ParameterName = SearchParameter.ParameterFieldName

        If Not SearchParameter.TransformedFieldValue = Nothing Then
            ValueParameter.Value = SearchParameter.TransformedFieldValue
        Else
            ValueParameter.Value = String.Empty
        End If

        ExactMatchSearchParameters.Add(ValueParameter)
    Next

    Dim MasterRecordParameter As New OracleParameter()

    MasterRecordParameter.Direction = ParameterDirection.Input
    MasterRecordParameter.OracleDbType = OracleDbType.Varchar2
    MasterRecordParameter.ParameterName = "MASTERRECORD"
    MasterRecordParameter.Value = DBNull.Value

    ExactMatchSearchParameters.Add(MasterRecordParameter)

    Dim TableParameter As New OracleParameter

    TableParameter.ParameterName = "C_Table"
    TableParameter.OracleDbType = OracleDbType.RefCursor
    TableParameter.Direction = ParameterDirection.Output

    ExactMatchSearchParameters.Add(TableParameter)

Using Command As OracleCommand = 
        New OracleCommand(
            QualifiedProcedureName, 
            Me.Database.Connection)

    Command.CommandType = CommandType.StoredProcedure
    'Command.AddToStatementCache = False '

    For Each Parameter In Parameters
        Command.Parameters.Add(Parameter)
    Next

    Command.Connection.Open()

    'Command.Connection.FlushCache() '

    Using Reader As OracleDataReader = Command.ExecuteReader()

*** SUCCESS ***
[SSN]: "6#######0"
[LASTNAME]: "W_____x"
[FIRSTNAME]: "D______e"
[MASTERRECORD]: ""
[C_Table]: ""

*** FAILURE ***
[SSN]: "2#######_1"
[LASTNAME]: "C____n"
[FIRSTNAME]: "L___e"
[MASTERRECORD]: ""
[C_Table]: ""

*** FAILURE ***
[SSN]: "5#######5"
[LASTNAME]: "C_______s"
[FIRSTNAME]: "R_____o"
[MASTERRECORD]: ""
[C_Table]: ""

*** SUCCESS ***
[SSN]: "6#######0"
[LASTNAME]: "P___a"
[FIRSTNAME]: "N______r"
[MASTERRECORD]: ""
[C_Table]: ""

?Command.Parameters(0)
{SSN}
    ArrayBindSize: Nothing
    ArrayBindStatus: Nothing
    CollectionType: None {0}
    DbType: String {16}
    Direction: Input {1}
    InvalidPrecision: 100
    InvalidScale: 129
    InvalidSize: -1
    IsNullable: False
    m_bOracleDbTypeExSet: False
    m_bReturnDateTimeOffset: False
    m_collRef: {Oracle.DataAccess.Client.OracleParameterCollection}
    m_commandText: ""
    m_direction: Input {1}
    m_disposed: False
    m_enumType: ORADBTYPE {4}
    m_modified: False
    m_oraDbType: Varchar2 {126}
    m_paramName: "SSN"
    m_paramPosOrName: ""
    m_saveValue: Nothing
    MaxScale: 127
    MinScale: -84
    Offset: 0
    OracleDbType: Varchar2 {126}
    OracleDbTypeEx: Varchar2 {126}
    ParameterEnumType: ORADBTYPE {4}
    ParameterName: "SSN"
    Precision: 0
    Scale: 0
    Size: 0
    SourceColumn: ""
    SourceColumnNullMapping: False
    SourceVersion: Current {512}
    Status: Success {0}
    UdtTypeName: ""
    Value: "4#######0" {String}

成功与失败示例：

procedure DUP_EXACT (
    SSN in VARCHAR2, 
    LASTNAME in VARCHAR2, 
    FIRSTNAME in VARCHAR2, 
    MASTERRECORD IN VARCHAR2 DEFAULT NULL,
    C_Table out sp_cursor)

    For Each SearchParameter In SearchParameters
        ValueParameter = New OracleParameter

        ValueParameter.Direction = ParameterDirection.Input
        ValueParameter.OracleDbType = OracleDbType.Varchar2
        ValueParameter.ParameterName = SearchParameter.ParameterFieldName

        If Not SearchParameter.TransformedFieldValue = Nothing Then
            ValueParameter.Value = SearchParameter.TransformedFieldValue
        Else
            ValueParameter.Value = String.Empty
        End If

        ExactMatchSearchParameters.Add(ValueParameter)
    Next

    Dim MasterRecordParameter As New OracleParameter()

    MasterRecordParameter.Direction = ParameterDirection.Input
    MasterRecordParameter.OracleDbType = OracleDbType.Varchar2
    MasterRecordParameter.ParameterName = "MASTERRECORD"
    MasterRecordParameter.Value = DBNull.Value

    ExactMatchSearchParameters.Add(MasterRecordParameter)

    Dim TableParameter As New OracleParameter

    TableParameter.ParameterName = "C_Table"
    TableParameter.OracleDbType = OracleDbType.RefCursor
    TableParameter.Direction = ParameterDirection.Output

    ExactMatchSearchParameters.Add(TableParameter)

Using Command As OracleCommand = 
        New OracleCommand(
            QualifiedProcedureName, 
            Me.Database.Connection)

    Command.CommandType = CommandType.StoredProcedure
    'Command.AddToStatementCache = False '

    For Each Parameter In Parameters
        Command.Parameters.Add(Parameter)
    Next

    Command.Connection.Open()

    'Command.Connection.FlushCache() '

    Using Reader As OracleDataReader = Command.ExecuteReader()

*** SUCCESS ***
[SSN]: "6#######0"
[LASTNAME]: "W_____x"
[FIRSTNAME]: "D______e"
[MASTERRECORD]: ""
[C_Table]: ""

*** FAILURE ***
[SSN]: "2#######_1"
[LASTNAME]: "C____n"
[FIRSTNAME]: "L___e"
[MASTERRECORD]: ""
[C_Table]: ""

*** FAILURE ***
[SSN]: "5#######5"
[LASTNAME]: "C_______s"
[FIRSTNAME]: "R_____o"
[MASTERRECORD]: ""
[C_Table]: ""

*** SUCCESS ***
[SSN]: "6#######0"
[LASTNAME]: "P___a"
[FIRSTNAME]: "N______r"
[MASTERRECORD]: ""
[C_Table]: ""

?Command.Parameters(0)
{SSN}
    ArrayBindSize: Nothing
    ArrayBindStatus: Nothing
    CollectionType: None {0}
    DbType: String {16}
    Direction: Input {1}
    InvalidPrecision: 100
    InvalidScale: 129
    InvalidSize: -1
    IsNullable: False
    m_bOracleDbTypeExSet: False
    m_bReturnDateTimeOffset: False
    m_collRef: {Oracle.DataAccess.Client.OracleParameterCollection}
    m_commandText: ""
    m_direction: Input {1}
    m_disposed: False
    m_enumType: ORADBTYPE {4}
    m_modified: False
    m_oraDbType: Varchar2 {126}
    m_paramName: "SSN"
    m_paramPosOrName: ""
    m_saveValue: Nothing
    MaxScale: 127
    MinScale: -84
    Offset: 0
    OracleDbType: Varchar2 {126}
    OracleDbTypeEx: Varchar2 {126}
    ParameterEnumType: ORADBTYPE {4}
    ParameterName: "SSN"
    Precision: 0
    Scale: 0
    Size: 0
    SourceColumn: ""
    SourceColumnNullMapping: False
    SourceVersion: Current {512}
    Status: Success {0}
    UdtTypeName: ""
    Value: "4#######0" {String}

附加测试：

procedure DUP_EXACT (
    SSN in VARCHAR2, 
    LASTNAME in VARCHAR2, 
    FIRSTNAME in VARCHAR2, 
    MASTERRECORD IN VARCHAR2 DEFAULT NULL,
    C_Table out sp_cursor)

    For Each SearchParameter In SearchParameters
        ValueParameter = New OracleParameter

        ValueParameter.Direction = ParameterDirection.Input
        ValueParameter.OracleDbType = OracleDbType.Varchar2
        ValueParameter.ParameterName = SearchParameter.ParameterFieldName

        If Not SearchParameter.TransformedFieldValue = Nothing Then
            ValueParameter.Value = SearchParameter.TransformedFieldValue
        Else
            ValueParameter.Value = String.Empty
        End If

        ExactMatchSearchParameters.Add(ValueParameter)
    Next

    Dim MasterRecordParameter As New OracleParameter()

    MasterRecordParameter.Direction = ParameterDirection.Input
    MasterRecordParameter.OracleDbType = OracleDbType.Varchar2
    MasterRecordParameter.ParameterName = "MASTERRECORD"
    MasterRecordParameter.Value = DBNull.Value

    ExactMatchSearchParameters.Add(MasterRecordParameter)

    Dim TableParameter As New OracleParameter

    TableParameter.ParameterName = "C_Table"
    TableParameter.OracleDbType = OracleDbType.RefCursor
    TableParameter.Direction = ParameterDirection.Output

    ExactMatchSearchParameters.Add(TableParameter)

Using Command As OracleCommand = 
        New OracleCommand(
            QualifiedProcedureName, 
            Me.Database.Connection)

    Command.CommandType = CommandType.StoredProcedure
    'Command.AddToStatementCache = False '

    For Each Parameter In Parameters
        Command.Parameters.Add(Parameter)
    Next

    Command.Connection.Open()

    'Command.Connection.FlushCache() '

    Using Reader As OracleDataReader = Command.ExecuteReader()

*** SUCCESS ***
[SSN]: "6#######0"
[LASTNAME]: "W_____x"
[FIRSTNAME]: "D______e"
[MASTERRECORD]: ""
[C_Table]: ""

*** FAILURE ***
[SSN]: "2#######_1"
[LASTNAME]: "C____n"
[FIRSTNAME]: "L___e"
[MASTERRECORD]: ""
[C_Table]: ""

*** FAILURE ***
[SSN]: "5#######5"
[LASTNAME]: "C_______s"
[FIRSTNAME]: "R_____o"
[MASTERRECORD]: ""
[C_Table]: ""

*** SUCCESS ***
[SSN]: "6#######0"
[LASTNAME]: "P___a"
[FIRSTNAME]: "N______r"
[MASTERRECORD]: ""
[C_Table]: ""

?Command.Parameters(0)
{SSN}
    ArrayBindSize: Nothing
    ArrayBindStatus: Nothing
    CollectionType: None {0}
    DbType: String {16}
    Direction: Input {1}
    InvalidPrecision: 100
    InvalidScale: 129
    InvalidSize: -1
    IsNullable: False
    m_bOracleDbTypeExSet: False
    m_bReturnDateTimeOffset: False
    m_collRef: {Oracle.DataAccess.Client.OracleParameterCollection}
    m_commandText: ""
    m_direction: Input {1}
    m_disposed: False
    m_enumType: ORADBTYPE {4}
    m_modified: False
    m_oraDbType: Varchar2 {126}
    m_paramName: "SSN"
    m_paramPosOrName: ""
    m_saveValue: Nothing
    MaxScale: 127
    MinScale: -84
    Offset: 0
    OracleDbType: Varchar2 {126}
    OracleDbTypeEx: Varchar2 {126}
    ParameterEnumType: ORADBTYPE {4}
    ParameterName: "SSN"
    Precision: 0
    Scale: 0
    Size: 0
    SourceColumn: ""
    SourceColumnNullMapping: False
    SourceVersion: Current {512}
    Status: Success {0}
    UdtTypeName: ""
    Value: "4#######0" {String}

我尝试运行跟踪，以查看ODP.NET在参数中实际发送到数据库的内容，但跟踪文件没有提供任何有意义的信息（即：实际参数值）

参数值示例：

procedure DUP_EXACT (
    SSN in VARCHAR2, 
    LASTNAME in VARCHAR2, 
    FIRSTNAME in VARCHAR2, 
    MASTERRECORD IN VARCHAR2 DEFAULT NULL,
    C_Table out sp_cursor)

    For Each SearchParameter In SearchParameters
        ValueParameter = New OracleParameter

        ValueParameter.Direction = ParameterDirection.Input
        ValueParameter.OracleDbType = OracleDbType.Varchar2
        ValueParameter.ParameterName = SearchParameter.ParameterFieldName

        If Not SearchParameter.TransformedFieldValue = Nothing Then
            ValueParameter.Value = SearchParameter.TransformedFieldValue
        Else
            ValueParameter.Value = String.Empty
        End If

        ExactMatchSearchParameters.Add(ValueParameter)
    Next

    Dim MasterRecordParameter As New OracleParameter()

    MasterRecordParameter.Direction = ParameterDirection.Input
    MasterRecordParameter.OracleDbType = OracleDbType.Varchar2
    MasterRecordParameter.ParameterName = "MASTERRECORD"
    MasterRecordParameter.Value = DBNull.Value

    ExactMatchSearchParameters.Add(MasterRecordParameter)

    Dim TableParameter As New OracleParameter

    TableParameter.ParameterName = "C_Table"
    TableParameter.OracleDbType = OracleDbType.RefCursor
    TableParameter.Direction = ParameterDirection.Output

    ExactMatchSearchParameters.Add(TableParameter)

Using Command As OracleCommand = 
        New OracleCommand(
            QualifiedProcedureName, 
            Me.Database.Connection)

    Command.CommandType = CommandType.StoredProcedure
    'Command.AddToStatementCache = False '

    For Each Parameter In Parameters
        Command.Parameters.Add(Parameter)
    Next

    Command.Connection.Open()

    'Command.Connection.FlushCache() '

    Using Reader As OracleDataReader = Command.ExecuteReader()

*** SUCCESS ***
[SSN]: "6#######0"
[LASTNAME]: "W_____x"
[FIRSTNAME]: "D______e"
[MASTERRECORD]: ""
[C_Table]: ""

*** FAILURE ***
[SSN]: "2#######_1"
[LASTNAME]: "C____n"
[FIRSTNAME]: "L___e"
[MASTERRECORD]: ""
[C_Table]: ""

*** FAILURE ***
[SSN]: "5#######5"
[LASTNAME]: "C_______s"
[FIRSTNAME]: "R_____o"
[MASTERRECORD]: ""
[C_Table]: ""

*** SUCCESS ***
[SSN]: "6#######0"
[LASTNAME]: "P___a"
[FIRSTNAME]: "N______r"
[MASTERRECORD]: ""
[C_Table]: ""

?Command.Parameters(0)
{SSN}
    ArrayBindSize: Nothing
    ArrayBindStatus: Nothing
    CollectionType: None {0}
    DbType: String {16}
    Direction: Input {1}
    InvalidPrecision: 100
    InvalidScale: 129
    InvalidSize: -1
    IsNullable: False
    m_bOracleDbTypeExSet: False
    m_bReturnDateTimeOffset: False
    m_collRef: {Oracle.DataAccess.Client.OracleParameterCollection}
    m_commandText: ""
    m_direction: Input {1}
    m_disposed: False
    m_enumType: ORADBTYPE {4}
    m_modified: False
    m_oraDbType: Varchar2 {126}
    m_paramName: "SSN"
    m_paramPosOrName: ""
    m_saveValue: Nothing
    MaxScale: 127
    MinScale: -84
    Offset: 0
    OracleDbType: Varchar2 {126}
    OracleDbTypeEx: Varchar2 {126}
    ParameterEnumType: ORADBTYPE {4}
    ParameterName: "SSN"
    Precision: 0
    Scale: 0
    Size: 0
    SourceColumn: ""
    SourceColumnNullMapping: False
    SourceVersion: Current {512}
    Status: Success {0}
    UdtTypeName: ""
    Value: "4#######0" {String}

这听起来可能有点奇怪，但请确保oracle参数在查询中显示时已添加。我在过去曾多次遇到过这个问题（通常是在迁移到ODP.NET的过程中）

答案是Oracle 9.2.0.6.0中存在一个bug，它会导致间歇性的VARCHAR2绑定错误。棒极了。

这种行为是持续的还是间歇性的？如果间歇，以及您的数据库是9206，可能会遇到以下rdbms错误：

Bug.4015165（74）不同大小的绑定中的REGRN标量VARCHAR2 使用ORA-06502随机失败

应该通过修补数据库来解决

我不知道为什么，但ODP似乎遇到这个bug的次数远不止这些其他司机

如果不是间歇性的，或者如果您使用的是当前补丁级别一个完整的测试用例可能是最好的

干杯，格雷格

快速检查验证我们所使用的版本是否受到影响：

select * from v$version;
----------------------------------------------------------------
Oracle9i Enterprise Edition Release 9.2.0.6.0 - Production       
PL/SQL Release 9.2.0.6.0 - Production                            
CORE    9.2.0.6.0   Production                                          
TNS for 32-bit Windows: Version 9.2.0.6.0 - Production           
NLSRTL Version 9.2.0.6.0 - Production

幸运的是，我们的生产服务器是10g的，所以我们最终也将我们的开发服务器更新为10g，viola没有更多的问题

回答线索：

procedure DUP_EXACT (
    SSN in VARCHAR2, 
    LASTNAME in VARCHAR2, 
    FIRSTNAME in VARCHAR2, 
    MASTERRECORD IN VARCHAR2 DEFAULT NULL,
    C_Table out sp_cursor)

    For Each SearchParameter In SearchParameters
        ValueParameter = New OracleParameter

        ValueParameter.Direction = ParameterDirection.Input
        ValueParameter.OracleDbType = OracleDbType.Varchar2
        ValueParameter.ParameterName = SearchParameter.ParameterFieldName

        If Not SearchParameter.TransformedFieldValue = Nothing Then
            ValueParameter.Value = SearchParameter.TransformedFieldValue
        Else
            ValueParameter.Value = String.Empty
        End If

        ExactMatchSearchParameters.Add(ValueParameter)
    Next

    Dim MasterRecordParameter As New OracleParameter()

    MasterRecordParameter.Direction = ParameterDirection.Input
    MasterRecordParameter.OracleDbType = OracleDbType.Varchar2
    MasterRecordParameter.ParameterName = "MASTERRECORD"
    MasterRecordParameter.Value = DBNull.Value

    ExactMatchSearchParameters.Add(MasterRecordParameter)

    Dim TableParameter As New OracleParameter

    TableParameter.ParameterName = "C_Table"
    TableParameter.OracleDbType = OracleDbType.RefCursor
    TableParameter.Direction = ParameterDirection.Output

    ExactMatchSearchParameters.Add(TableParameter)

Using Command As OracleCommand = 
        New OracleCommand(
            QualifiedProcedureName, 
            Me.Database.Connection)

    Command.CommandType = CommandType.StoredProcedure
    'Command.AddToStatementCache = False '

    For Each Parameter In Parameters
        Command.Parameters.Add(Parameter)
    Next

    Command.Connection.Open()

    'Command.Connection.FlushCache() '

    Using Reader As OracleDataReader = Command.ExecuteReader()

*** SUCCESS ***
[SSN]: "6#######0"
[LASTNAME]: "W_____x"
[FIRSTNAME]: "D______e"
[MASTERRECORD]: ""
[C_Table]: ""

*** FAILURE ***
[SSN]: "2#######_1"
[LASTNAME]: "C____n"
[FIRSTNAME]: "L___e"
[MASTERRECORD]: ""
[C_Table]: ""

*** FAILURE ***
[SSN]: "5#######5"
[LASTNAME]: "C_______s"
[FIRSTNAME]: "R_____o"
[MASTERRECORD]: ""
[C_Table]: ""

*** SUCCESS ***
[SSN]: "6#######0"
[LASTNAME]: "P___a"
[FIRSTNAME]: "N______r"
[MASTERRECORD]: ""
[C_Table]: ""

?Command.Parameters(0)
{SSN}
    ArrayBindSize: Nothing
    ArrayBindStatus: Nothing
    CollectionType: None {0}
    DbType: String {16}
    Direction: Input {1}
    InvalidPrecision: 100
    InvalidScale: 129
    InvalidSize: -1
    IsNullable: False
    m_bOracleDbTypeExSet: False
    m_bReturnDateTimeOffset: False
    m_collRef: {Oracle.DataAccess.Client.OracleParameterCollection}
    m_commandText: ""
    m_direction: Input {1}
    m_disposed: False
    m_enumType: ORADBTYPE {4}
    m_modified: False
    m_oraDbType: Varchar2 {126}
    m_paramName: "SSN"
    m_paramPosOrName: ""
    m_saveValue: Nothing
    MaxScale: 127
    MinScale: -84
    Offset: 0
    OracleDbType: Varchar2 {126}
    OracleDbTypeEx: Varchar2 {126}
    ParameterEnumType: ORADBTYPE {4}
    ParameterName: "SSN"
    Precision: 0
    Scale: 0
    Size: 0
    SourceColumn: ""
    SourceColumnNullMapping: False
    SourceVersion: Current {512}
    Status: Success {0}
    UdtTypeName: ""
    Value: "4#######0" {String}

您是否尝试过使用硬编码值手动构建OracleParameter对象并将其添加到OracleCommand中的测试。。。用动态代码解决一个问题。这解决了一个问题，但另一个仍然失败。很好的提醒，但我很确定它们在查询中是有序的，因为打印成功/失败消息的调试代码是从参数的for循环打印出来的默认值是bind by position，但您可以将bindbyname属性设置为true，以帮助从其他提供程序（如OracleClient）迁移代码。