/**
* Creates a table with columns got from metadata. PAY ATTENTION TO THE FACT THAT THE INPUT
* CONNECTION WON'T BE CLOSED!!!!!
*
* @param conn The JDBC connection to be used
* @param meta The metadata of the dataset to be persisted on the database
* @param tableName The name of the table to be created
* @param list The list of the fields of the dataset to be included on table
* @return A DataSetTableDescriptor that contains the association between table's columns and
* dataset's fields.
*/
public static DataSetTableDescriptor createTemporaryTable(
Connection conn, IMetaData meta, String tableName, List<String> selectedFields) {
logger.debug("IN");
DataSetTableDescriptor dstd = null;
Statement st = null;
String sqlQuery = null;
if (selectedFields == null) {
selectedFields = new ArrayList<String>();
}
try {
CreateTableCommand createTableCommand =
new CreateTableCommand(tableName, conn.getMetaData().getDriverName());
// run through all columns in order to build the SQL columndefinition
int count = meta.getFieldCount();
logger.debug("The table tableName has " + count + " columns ");
for (int i = 0; i < count; i++) {
IFieldMetaData fieldMeta = meta.getFieldMeta(i);
String fieldName = fieldMeta.getName();
if (selectedFields.isEmpty() || selectedFields.contains(fieldName)) {
createTableCommand.addColumn(fieldMeta);
}
}
// after built columns create SQL Query
sqlQuery = createTableCommand.createSQLQuery();
// execute
logger.debug("Executing the query " + sqlQuery + "...");
st = conn.createStatement();
st.execute(sqlQuery);
logger.debug("Query executed");
dstd = createTableCommand.getDsTableDescriptor();
LogMF.debug(logger, "The query descriptor is {0}", dstd);
} catch (SQLException e) {
logger.error("Error in excuting statement " + sqlQuery, e);
throw new SpagoBIRuntimeException("Error creating temporary table", e);
} finally {
try {
if (st != null) {
st.close();
}
} catch (SQLException e) {
logger.error("could not free resources ", e);
}
}
logger.debug("OUT");
return dstd;
}
private void changeAlias(IDataStore dataStore) {
logger.debug("IN");
IMetaData metaData = dataStore.getMetaData();
for (int i = 0; i < metaData.getFieldCount(); i++) {
IFieldMetaData meta = metaData.getFieldMeta(i);
Column col = registryConfig.getColumnConfiguration(meta.getAlias());
if (col.getTitle() != null) {
meta.setAlias(col.getTitle());
// metaData.changeFieldAlias(i, col.getTitle());
logger.debug("Changed alias of column " + meta.getName() + " to " + col.getTitle());
}
}
logger.debug("OUT");
}
