Notice: this Wiki will be going read only early in 2024 and edits will no longer be possible. Please see: https://gitlab.eclipse.org/eclipsefdn/helpdesk/-/wikis/Wiki-shutdown-plan for the plan.
Difference between revisions of "EDT:Default SQL Generation"
| Line 9: | Line 9: | ||
record Product{@Table {name="Product"}}<br> id bigint{@Id};<br> name string;<br> price float; <br> end | record Product{@Table {name="Product"}}<br> id bigint{@Id};<br> name string;<br> price float; <br> 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''' (5) GET basicRec from ds; //for basic record Change To: GET basicRec from ds using basicRec.id with #sql{ select id, rtrim(name), price from Product where id = ? }; (6) GET itemEntity from ds; //for entity record Change To: GET itemEntity from ds using itemEntity.ITEM_ID with #sql{ select ITEM_ID, rtrim(Name), rtrim(IMAGE), price, rtrim(description) from OrderItem where ITEM_ID = ? }; '''OPEN Statement ''' (7) rows OrderItem; open rs from ds for rows; Change To: open rs from ds using rows.ITEM_ID with #sql{ select ITEM_ID, rtrim(Name), rtrim(IMAGE), price, rtrim(description) from OrderItem where ITEM_ID = ? }; '''REPLACE Statement''' (8) replace itemEntity to ds ; Change To: replace itemEntity to ds with #sql{ update OrderItem set Name = ?,IMAGE = ?, price = ?,description = ? where ITEM_ID = ? } ; Now the feature can only generate default SQL statements for entity record that does not contain any entity relationship field. | + | The above is a basic record definition, one must use annotation '''@Id''' to specific which record field is used as primary key, <br>also can use annotation '''@Table''' to specify to which table the record is mapped, just as 'Product' definition shows, but this is <br>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''' (5) GET basicRec from ds; //for basic record Change To: GET basicRec from ds using basicRec.id with #sql{ select id, rtrim(name), price from Product where id = ? }; (6) GET itemEntity from ds; //for entity record Change To: GET itemEntity from ds using itemEntity.ITEM_ID with #sql{ select ITEM_ID, rtrim(Name), rtrim(IMAGE), price, rtrim(description) from OrderItem where ITEM_ID = ? }; '''OPEN Statement ''' (7) rows OrderItem; open rs from ds for rows; Change To: open rs from ds using rows.ITEM_ID with #sql{ select ITEM_ID, rtrim(Name), rtrim(IMAGE), price, rtrim(description) from OrderItem where ITEM_ID = ? }; '''REPLACE Statement''' (8) replace itemEntity to ds ; Change To: replace itemEntity to ds with #sql{ update OrderItem set Name = ?,IMAGE = ?, price = ?,description = ? where ITEM_ID = ? } ; Now the feature can only generate default SQL statements for entity record that does not contain any entity relationship field. |
<br> | <br> | ||
<br> | <br> | ||
Revision as of 21:30, 28 December 2011
Overview
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 (5) GET basicRec from ds; //for basic record Change To: GET basicRec from ds using basicRec.id with #sql{ select id, rtrim(name), price from Product where id = ? }; (6) GET itemEntity from ds; //for entity record Change To: GET itemEntity from ds using itemEntity.ITEM_ID with #sql{ select ITEM_ID, rtrim(Name), rtrim(IMAGE), price, rtrim(description) from OrderItem where ITEM_ID = ? }; OPEN Statement (7) rows OrderItem; open rs from ds for rows; Change To: open rs from ds using rows.ITEM_ID with #sql{ select ITEM_ID, rtrim(Name), rtrim(IMAGE), price, rtrim(description) from OrderItem where ITEM_ID = ? }; REPLACE Statement (8) replace itemEntity to ds ; Change To: replace itemEntity to ds with #sql{ update OrderItem set Name = ?,IMAGE = ?, price = ?,description = ? where ITEM_ID = ? } ; Now the feature can only generate default SQL statements for entity record that does not contain any entity relationship field.