/**
* Removes previous ra/dec index, if it is found.
*
* @param dbConn database connection
* @param tapTableInfo current database information.
* @return 'true' if the field has been updated.
* @throws DBException
*/
public static boolean removePrevRaDecIfExists(
JDBCPooledFunctions dbConn, TapTableInfo tapTableInfo) throws DBException {
String raColumn = null;
String decColumn = null;
int flags = 0;
for (String tableColumnName : tapTableInfo.getTableColumnNames()) {
// tapTableInfo contains database current info: flags is an integer in database (it can be
// null)
flags = Utils.getFlagsFromTapTable(tapTableInfo, tableColumnName);
if ((flags & Utils.TAP_COLUMN_TABLE_FLAG_RA) > 0) {
raColumn = tableColumnName;
continue;
}
if ((flags & Utils.TAP_COLUMN_TABLE_FLAG_DEC) > 0) {
decColumn = tableColumnName;
continue;
}
}
if (raColumn == null || decColumn == null) {
// wrong ra/dec specification, no index created.
return false;
}
// we have the previous ra/dec indexed columns, remove them
dbConn.removeRaAndDecIndexes(
tapTableInfo.getSchemaName(),
tapTableInfo.getTableName(),
raColumn,
decColumn,
Utils.TAP_TABLE_TYPE_RADEC);
return true;
}
/**
* Creates a ra/dec index.<br>
* Checks whether ra/dec are already indexed.<br>
* The previous ra/dec index is removed (if it is found).<br>
*
* @param dbConn database connection.
* @param tapTableInfo current database information.
* @param raColumn
* @param decColumn
* @return 'true' if the field has been updated.
* @throws DBException
*/
public static boolean indexRaDec(
JDBCPooledFunctions dbConn, TapTableInfo tapTableInfo, String raColumn, String decColumn)
throws DBException {
if (raColumn == null) {
throw new IllegalArgumentException("Ra column not found");
}
if (decColumn == null) {
throw new IllegalArgumentException("Dec column not found");
}
// If it is already indexed, do not index again.
// Remove old Ra/Dec if they are not the same columns.
boolean alreadyIndexed = Utils.areAlreadyIndexedRaDec(tapTableInfo, raColumn, decColumn);
if (alreadyIndexed) {
// Nothing to do, ra/dec are already indexed on the same columns.
return false;
}
// Not the same columns.
// Remove previous ra/dec if they exists
removePrevRaDecIfExists(dbConn, tapTableInfo);
// Create new indexes
dbConn.createRaAndDecIndexes(
tapTableInfo.getSchemaName(),
tapTableInfo.getTableName(),
raColumn,
decColumn,
Utils.TAP_TABLE_TYPE_RADEC);
return true;
}
