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EDT:Default SQL Generation
Revision as of 03:43, 22 December 2011 by Zhuzhi.cn.ibm.com (Talk | contribs)
Quick Assist Support for Default SQL Generation
EDT 0.7.0 release provides quick assist support for the following EGL action statements to generate default SQL statements: 1 ADD Statement 2 DELETE Statement 3 GET Statement 4 OPEN Statement 5 REPLACE Statement Use examples to show how to use the feature in EDT plugin. EGL Record Definition: record Product{@Table {name="Product"}} id bigint{@Id}; name string; price float; end The above is a basic record definition, one must use annotation @Id to specific which record field is used as primary key, also can use annotation @Table to specify to which table the record is mapped, just as 'Product' definition shows, but this is optional. record OrderItem type Entity{@table{name = "OrderItem"}} ITEM_ID int{@Id}; NAME string{ @Column { insertable=true } }; IMAGE string?{ @Column { updateable=true } }; PRICE decimal(7, 2)?; DESCRIPTION string?; end The above is an entity record definition that is generated from a table schema. EGL Variable Definition basicRec Product; itemEntity OrderItem; rs SQLResultSet?; ds SQLDataSource? = new SQLDataSource("jdbc:derby:C:/databases/EGLDerbyR7;create=true"); ADD Statement Click anywhere in the EGL statement and press CTRL+1, and press “Add SQL Statement” proposal, default SQL statement will be added to the above statement: (1) add basicRec to ds; //for basic record Change To: add basicRec to ds with #sql{ insert into Product (id, name, price) values (?, ?, ?)}; (2) add itemEntity to ds; //for entity record Change To: add itemEntity to ds with #sql{ insert into OrderItem (ITEM_ID, Name, IMAGE, price, description) values (?, ?, ?, ?, ?) }; DELETE Statement (3) delete basicRec from ds; // for basic record Change To: delete basicRec from ds with #sql{ delete from Product where id = ? }; (4) delete itemEntity from ds; //for entity record Change To: delete itemEntity from ds with #sql{ delete from OrderItem where ITEM_ID = ? }; GET Statement
- OPEN Statement
- REPLACE Statement