tech.ydb.jdbc.YdbResultSetMetaData Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of ydb-jdbc-driver Show documentation

JDBC Driver over YDB Java SDK

There is a newer version: 2.3.5

package tech.ydb.jdbc;

import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import tech.ydb.table.values.Type;

public interface YdbResultSetMetaData extends ResultSetMetaData {

    /**
     * Returns native YDB type for column
     *
     * @param column column, 1..N
     * @return YDB type
     */
    Type getYdbType(int column) throws SQLException;

    /**
     * Returns column index by it's name, could be useful sometimes; basically because in YDB you should always
     * work with names (columns or parameters), indexes are just internal details
     *
     * @param columnName column name to find
     * @return column (1..N)
     * @throws SQLException if column is unknown
     */
    int getColumnIndex(String columnName) throws SQLException;

    /**
     * Returns all column names
     *
     * @return column names
     * @throws SQLException in case something bad happens
     */
    default Collection getColumnNames() throws SQLException {
        int count = getColumnCount();
        List columns = new ArrayList<>(count);
        for (int i = 0; i < count; i++) {
            columns.add(getColumnName(i + 1));
        }
        return columns;
    }
}