[英]Upper case in HSQL
有什么方法可以为HSQL创建表中的元素以大写形式创建默认值
CREATE TABLE IF NOT EXISTS "job" (
"id" INTEGER IDENTITY,
"jobId" BIGINT ,
"jobName" VARCHAR(100) ,
PRIMARY KEY ("jobName")
);
现在,我需要每次将jobName都存储为大写。
您可以使用计算/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'
对于HSQLDB,带有生成列的解决方案(类似于MySQL解决方案)为:
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")
);
有一个使用BEFORE INSERT触发器的更好的解决方案,该触发器无需额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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