Sql 如何在Netezza上的存储过程中使用用例syntac

我只是netezza（运行版本netezza 7.1.0.1-P1[Build 37788]）的新手，我创建了一个从另一个数据库加载数据的查询，这是我的查询：

CASE INSTR(B.WIFI.WIFI_DETAIL.LOCATION, ';') WHEN 0 THEN B.WIFI.WIFI_DETAIL.LOCATION ELSE BTRIM(SUBSTR(B.WIFI.WIFI_DETAIL.LOCATION, 1, INSTR(B.WIFI.WIFI_DETAIL.LOCATION, ';')-1)) END AS POI_NAME

它运行得很完美，但当我放入存储过程时，它已经使用@ScottMcG的解决方案进行了修改：

create or replace procedure SP_CREATE_TMP_F_WIFIID_AP_UTILISASI()
LANGUAGE NZPLSQL RETURNS INT4 AS
BEGIN_PROC

DECLARE

BEGIN
    /* CREATE TABLE TMP AP UTILISASI WITHOUT CLIENT */
    EXECUTE IMMEDIATE '
        create TABLE TMP_F_AP_UTILISASI as select AVG(ANN.THROUGPUT_V) as AVG_THROUGHPUT
            , SUM(ANN.BYTES_SENT) AS SUM_SENT
            , SUM(ANN.BYTES_RECIEVE) AS SUM_RECIEVE
            , (SUM(ANN.BYTES_RECIEVE)+SUM(ANN.BYTES_SENT)) AS TOTAL_AMOUNT
            , COUNT(ANN.C_MAC_ADDRESS) AS ASSOCIATED_CLIENT_COUNT
            , COUNT(ANN.USER_NAME) AS AUTHENTICATED_CLIENT_COUNT
            , MAX(ANN.TOTAL_WAKTU) AS MAX_SESSION_DURATION
            , ANN.AP_NAME
            , ANN.ASSO_TIME_V
            , ANN.PAKET_NAME
            , ANN.SSID
            , CASE INSTR(AD.LOCATION, ' || quote_literal (';') || ') WHEN 0 THEN AD.LOCATION ELSE BTRIM(SUBSTR(AD.LOCATION, 1, INSTR(AD.LOCATION, ' || quote_literal (';') || ')-1)) END AS POI_NAME
        FROM
            A.USR3.V_ALL_NMS_DETAIL AS ANN
        JOIN A.USR3.V_NMS_AP_DETAIL AS AD
            ON ANN.AP_NAME = AD.AP_NAME
        GROUP BY ANN.AP_NAME
            , ANN.ASSO_TIME_V
            , ANN.PAKET_NAME
            , ANN.SSID
            , AD.LOCATION
    ';

END;

END_PROC;

当我调用程序时，它仍然不起作用：

ERROR: Cross Database Access not supported for this type of command

我从数据库A调用，并在

也许你有办法解决我的问题

或者，对于此查询，任何一个查询都可能具有另一个要相等的查询：

CASE INSTR(AD.LOCATION, ' || quote_literal (';') || ') WHEN 0 THEN AD.LOCATION ELSE BTRIM(SUBSTR(AD.LOCATION, 1, INSTR(AD.LOCATION, ' || quote_literal (';') || ')-1)) END AS POI_NAME

Thx

试试这个：

    create or replace procedure SP_CREATE_TMP_F_WIFIID_AP_UTILISASI()
LANGUAGE NZPLSQL RETURNS INT4 AS
BEGIN_PROC

DECLARE

BEGIN
    /* CREATE TABLE TMP AP UTILISASI WITHOUT CLIENT */
    EXECUTE IMMEDIATE '
        create TABLE TMP_F_AP_UTILISASI as select AVG(ANN.THROUGPUT_V) as AVG_THROUGHPUT
            , SUM(ANN.BYTES_SENT) AS SUM_SENT
            , SUM(ANN.BYTES_RECIEVE) AS SUM_RECIEVE
            , (SUM(ANN.BYTES_RECIEVE)+SUM(ANN.BYTES_SENT)) AS TOTAL_AMOUNT
            , COUNT(ANN.C_MAC_ADDRESS) AS ASSOCIATED_CLIENT_COUNT
            , COUNT(ANN.USER_NAME) AS AUTHENTICATED_CLIENT_COUNT
            , MAX(ANN.TOTAL_WAKTU) AS MAX_SESSION_DURATION
            , ANN.AP_NAME
            , ANN.ASSO_TIME_V
            , ANN.PAKET_NAME
            , ANN.SSID
            , CASE INSTR(AD.LOCATION, ";") WHEN 0 THEN AD.LOCATION ELSE BTRIM(SUBSTR(AD.LOCATION, 1, INSTR(AD.LOCATION, ";")-1)) END AS POI_NAME
        FROM
            A.USR3.V_ALL_NMS_DETAIL AS ANN
        JOIN A.USR3.V_NMS_AP_DETAIL AS AD
            ON ANN.AP_NAME = AD.AP_NAME
        GROUP BY ANN.AP_NAME
            , ANN.ASSO_TIME_V
            , ANN.PAKET_NAME
            , ANN.SSID
            , AD.LOCATION
    ';

END;

END_PROC;

---

在你的情况下，问题不在于案件本身。在存储过程中使用动态SQL时（例如，EXECUTE IMMEDIATE），需要转义文本中嵌入的引号。你可以用两种（至少）方法来做这件事

下面是两个使用带有字符串文本的CASE语句的存储过程示例。第一个使用两个单引号“”表示转义单引号。第二个使用quote_literal函数

转义引号版本

CREATE OR REPLACE PROCEDURE SP_SAMPLE()
RETURNS INTEGER
EXECUTE AS CALLER
LANGUAGE NZPLSQL AS
BEGIN_PROC

BEGIN

EXECUTE IMMEDIATE 'UPDATE TESTING_TABLE SET COL1 =  CASE INSTR(COL2,'';'') WHEN 0 THEN ''NOT SEMICOLON'' ELSE ''SEMICOLON'' END';

END;
END_PROC;

QUOTE_文字函数版本

CREATE OR REPLACE PROCEDURE SP_SAMPLE()
RETURNS INTEGER
EXECUTE AS CALLER
LANGUAGE NZPLSQL AS
BEGIN_PROC

BEGIN

EXECUTE IMMEDIATE 'UPDATE TESTING_TABLE SET COL1 =  CASE INSTR(COL2,' || quote_literal (';') ||
    ') WHEN 0 THEN ' || quote_literal('NOT SEMICOLON') || ' ELSE ' || quote_literal('SEMICOLON') || ' END';

END;
END_PROC;

---

您可以参考文档和示例

您必须在SQL字符串中转义引号。“；”）应成为“”；“”）你好@FrankHeikens，还是错误…错误：属性“；”不需要foundthx的帮助，但仍然存在错误：（.error:error:Attribute“；”not foundhi@ScottMcG，我已经尝试了您建议的解决方案，但是error:error:Cross-Database Access不支持这种类型的命令它不能跨数据库？当我将表放在一个数据库中时，仍然会出现错误：error:Cross-Database Access不支持这种类型的命令可能您已经解决此问题的另一个解决方案THX您正在运行哪个版本的Netezza？能否使用quote_文字将您的问题文本更新为全新版本？存储过程是在哪个数据库中创建的，您从哪个数据库调用它？向我们展示创建SP和执行SP的完整上下文t跨数据库访问错误。