package liquibase.sqlgenerator.core;
import liquibase.database.Database;
import liquibase.database.core.DerbyDatabase;
import liquibase.database.core.H2Database;
import liquibase.database.core.HsqlDatabase;
import liquibase.database.core.MSSQLDatabase;
import liquibase.structure.core.Column;
import liquibase.structure.core.Schema;
import liquibase.structure.core.Table;
import liquibase.datatype.DataTypeFactory;
import liquibase.exception.ValidationErrors;
import liquibase.sql.Sql;
import liquibase.sql.UnparsedSql;
import liquibase.sqlgenerator.SqlGeneratorChain;
import liquibase.statement.core.AddAutoIncrementStatement;
public class AddAutoIncrementGenerator extends AbstractSqlGenerator<AddAutoIncrementStatement> {
@Override
public int getPriority() {
return PRIORITY_DEFAULT;
}
@Override
public boolean supports(AddAutoIncrementStatement statement, Database database) {
return (database.supportsAutoIncrement()
&& !(database instanceof DerbyDatabase)
&& !(database instanceof MSSQLDatabase)
&& !(database instanceof HsqlDatabase)
&& !(database instanceof H2Database));
}
@Override
public ValidationErrors validate(
AddAutoIncrementStatement statement,
Database database,
SqlGeneratorChain sqlGeneratorChain) {
ValidationErrors validationErrors = new ValidationErrors();
validationErrors.checkRequiredField("columnName", statement.getColumnName());
validationErrors.checkRequiredField("tableName", statement.getTableName());
validationErrors.checkRequiredField("columnDataType", statement.getColumnDataType());
return validationErrors;
}
@Override
public Sql[] generateSql(
AddAutoIncrementStatement statement,
Database database,
SqlGeneratorChain sqlGeneratorChain) {
String sql = "ALTER TABLE "
+ database.escapeTableName(statement.getCatalogName(), statement.getSchemaName(), statement.getTableName())
+ " MODIFY "
+ database.escapeColumnName(statement.getCatalogName(), statement.getSchemaName(), statement.getTableName(), statement.getColumnName())
+ " "
+ DataTypeFactory.getInstance().fromDescription(statement.getColumnDataType() + "{autoIncrement:true}", database).toDatabaseDataType(database)
+ " "
+ database.getAutoIncrementClause(statement.getStartWith(), statement.getIncrementBy());
return new Sql[]{
new UnparsedSql(sql, getAffectedColumn(statement))
};
}
protected Column getAffectedColumn(AddAutoIncrementStatement statement) {
return new Column()
.setRelation(new Table().setName(statement.getTableName()).setSchema(new Schema(statement.getCatalogName(), statement.getSchemaName())))
.setName(statement.getColumnName());
}
}