package liquibase.sqlgenerator.core;
import liquibase.database.Database;
import liquibase.database.core.InformixDatabase;
import liquibase.structure.core.Schema;
import liquibase.datatype.DataTypeFactory;
import liquibase.structure.core.Column;
import liquibase.structure.core.Table;
import liquibase.exception.ValidationErrors;
import liquibase.sql.Sql;
import liquibase.sql.UnparsedSql;
import liquibase.sqlgenerator.SqlGeneratorChain;
import liquibase.statement.core.AddDefaultValueStatement;
public class AddDefaultValueGeneratorInformix extends AddDefaultValueGenerator {
@Override
public int getPriority() {
return PRIORITY_DATABASE;
}
@Override
public boolean supports(AddDefaultValueStatement statement, Database database) {
return database instanceof InformixDatabase;
}
@Override
public ValidationErrors validate(AddDefaultValueStatement addDefaultValueStatement, Database database,
SqlGeneratorChain sqlGeneratorChain) {
ValidationErrors validationErrors = super.validate(addDefaultValueStatement, database, sqlGeneratorChain);
if (addDefaultValueStatement.getColumnDataType() == null) {
validationErrors.checkRequiredField("columnDataType", addDefaultValueStatement.getColumnDataType());
}
return validationErrors;
}
@Override
public Sql[] generateSql(AddDefaultValueStatement statement, Database database, SqlGeneratorChain sqlGeneratorChain) {
Object defaultValue = statement.getDefaultValue();
StringBuffer sql = new StringBuffer("ALTER TABLE ");
sql.append(database.escapeTableName(statement.getCatalogName(), statement.getSchemaName(), statement.getTableName()));
sql.append(" MODIFY (");
sql.append(database.escapeColumnName(statement.getCatalogName(), statement.getSchemaName(), statement.getTableName(),
statement.getColumnName()));
sql.append(" ");
sql.append(DataTypeFactory.getInstance().fromDescription(statement.getColumnDataType(), database));
sql.append(" DEFAULT ");
sql.append(DataTypeFactory.getInstance().fromObject(defaultValue, database)
.objectToSql(defaultValue, database));
sql.append(")");
UnparsedSql unparsedSql = new UnparsedSql(sql.toString(), getAffectedColumn(statement));
return new Sql[] { unparsedSql };
}
}