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key-constraints.md

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Working with key contraints

Setting Primary Key

Single Key

Schema schema = new Schema();

Field idField = new IntegerField("id");
schema.addField(idField);

Field nameField = new StringField("name");
schema.addField(nameField);

schema.setPrimaryKey("id");
String primaryKey = schema.getPrimaryKey();

Composite Key

Schema schema = new Schema();

Field idField = new IntegerField("id");
schema.addField(idField);

Field nameField = new StringField("name");
schema.addField(nameField);

Field surnameField = new StringField("surname");
schema.addField(surnameField);

schema.setPrimaryKey(new String[]{"name", "surname"});
String[] compositeKey = schema.getPrimaryKey();