错误 [22P02] 错误：整数的输入语法无效：“”；

Question

从未见过这样的错误：

错误 [22P02] 错误：整数输入语法无效：“”；执行查询时出错

创建表：

    Public Function PrimkCreate(ByVal myPrimkTable As String, ByVal nCon As OdbcConnection) As Integer
    Dim ans As Integer
    Dim cCommand As OdbcCommand = New OdbcCommand("CREATE TABLE IF NOT EXISTS " + myPrimkTable + "(" & _
            "prm_id int NOT NULL, " & _
            "pkni text, " & _
            "pdatum text, " & _
            "pdatumnaplate text, " & _
            "pdanaodgode int, " & _
            "puldok text, " & _
            "puldokbroj text, " & _
            "pdatumk text, " & _
            "pvrijemek text, " & _
            "pdobid int, " & _
            "pdoboib text, " & _
            "pnabc double precision, " & _
            "purab double precision, " & _
            "ppdv double precision, " & _
            "ppnak double precision, " & _
            "pprodc double precision, " & _
            "pvrstaprimke int, " & _
            "pzapisniktekst text, " & _
            "prez text, " & _
            "CONSTRAINT " & myPrimkTable & "_pkey PRIMARY KEY(prm_id))", nCon)

    ans = cCommand.ExecuteNonQuery()
    cCommand.Dispose()
    Return ans
End Function

更新代码：

    Public Function update_LPrimk(ByRef primk As Integer, ByVal mCon As OdbcConnection) As Integer

    Dim retval As Integer
    Dim uCmd As OdbcCommand = New OdbcCommand("UPDATE " & myPrimkTable & " SET " & _
                "prm_id=" & primk & ", " & _
                "pkni='" & prm.pKni & "', " & _
                "pdatum='" & prm.pDatum & "', " & _
                "pdatumnaplate='" & prm.pDatumNaplate & "', " & _
                "pdanaodgode=" & prm.pDanaodgode & ", " & _
                "puldok='" & prm.pUlDok & "', " & _
                "puldokbroj='" & prm.pUlDokBroj & "', " & _
                "pdatumk='" & prm.pDatumk & "', " & _
                "pvrijemek='" & prm.pVrijemek & "', " & _
                "pdobid='" & prm.pDobID & "', " & _
                "pdoboib='" & prm.pDobOib & "', " & _
                "pnabc='" & Replace(prm.pNabc.ToString, ",", ".") & "', " & _
                "purab='" & Replace(prm.pURab.ToString, ",", ".") & "', " & _
                "ppdv='" & Replace(prm.pPdv.ToString, ",", ".") & "', " & _
                "ppnak='" & Replace(prm.pPnak.ToString, ",", ".") & "', " & _
                "pprodc='" & Replace(prm.pProdc.ToString, ",", ".") & "', " & _
                "pvrstaprimke=" & prm.pVrstaPrimke & ", " & _
                "pzapisniktekst='" & prm.pZapisnikTekst & "', " & _
                "prez='" & prm.pRez & "' " & _
                "WHERE prm_id=" + primk.ToString, mCon)

    retval = uCmd.ExecuteNonQuery()
    uCmd.Dispose()
    Return retval
End Function

查询看起来完全像这样：

UPDATE primke SET prm_id=1, pkni='U', pdatum='07.01.2013', pdatumnaplate='10.01.2013',
pdanaodgode=3, puldok='ghkzug gugug', puldokbroj='jkhk', pdatumk='', pvrijemek='', 
pdobid='', pdoboib='', pnabc='0', purab='0', ppdv='0', ppnak='0', pprodc='0', 
pvrstaprimke=0, pzapisniktekst='', prez='' WHERE prm_id=1

我有很多表运行类似的命令，但从未见过这样的错误。
可能是什么问题？

Answer 1

我建议阅读 Constants in the manual 章节。这是一个简短而内容丰富的阅读。
错误消息的原因是'' 是一个空字符串，它没有像integer 这样的数字类型的表示。

@a_horse_with_no_name：准确地说，'0' 是 PostgreSQL 的一个 string 常量，可以转换为 integer，也可以转换为 text，只有 @987654329 @ 是字符串常量的默认值。考虑这个演示：

CREATE TEMP TABLE t (i int);
INSERT INTO t VALUES (1);
INSERT INTO t VALUES ('2');        -- single row inserts to make sure ..
INSERT INTO t VALUES ('3'::int);   -- .. type is not coerced to type
INSERT INTO t VALUES (4::bigint);  -- .. of first row by VALUES expression.
INSERT INTO t VALUES (5::numeric);
INSERT INTO t VALUES (6);

UPDATE t SET i = '0' WHERE i = '6';
SELECT * FROM t;

SQL Fiddle.