[英]Upper case in HSQL
有什么方法可以為HSQL創建表中的元素以大寫形式創建默認值
CREATE TABLE IF NOT EXISTS "job" (
"id" INTEGER IDENTITY,
"jobId" BIGINT ,
"jobName" VARCHAR(100) ,
PRIMARY KEY ("jobName")
);
現在,我需要每次將jobName都存儲為大寫。
您可以使用計算/生成的列:
-- MySQL
CREATE TABLE job (
id INT AUTO_INCREMENT,
jobid INT ,
jobName VARCHAR(100) ,
jobNameU VARCHAR(100) GENERATED ALWAYS AS (UPPER(jobName)) STORED,
PRIMARY KEY (jobNameU),
KEY(id)
);
INSERT INTO job(id, jobid, jobName)
VALUES (1,2,'aaa');
INSERT INTO job( jobid, jobName)
VALUES (2,'aaA')
-- Duplicate entry 'AAA' for key 'PRIMARY'
對於HSQLDB,帶有生成列的解決方案(類似於MySQL解決方案)為:
CREATE TABLE IF NOT EXISTS "job" (
"id" INTEGER IDENTITY,
"jobId" BIGINT ,
"jobName" VARCHAR(100) ,
"jobNameU" VARCHAR(100) GENERATED ALWAYS AS (UPPER("jobName")),
PRIMARY KEY ("jobNameU")
);
有一個使用BEFORE INSERT觸發器的更好的解決方案,該觸發器無需額外生成的列即可工作:
CREATE TABLE IF NOT EXISTS "job" (
"id" INTEGER IDENTITY,
"jobId" BIGINT ,
"jobName" VARCHAR(100) ,
PRIMARY KEY ("jobName")
);
CREATE TRIGGER makeUpper BEFORE INSERT ON "job" REFERENCING NEW ROW AS NEW
FOR EACH ROW
SET NEW."jobName" = UPPER(NEW."jobName")
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