Comments - About MariaDB Connector/J
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Thank you for the link.
The situation in my case is different. Here is a simplified code for my example where normally I get the auto-increment:
ResultSet rscol = null;
String autoInc =null;
int colAutoInc=0;
Statement stmt = cnx.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
ResultSet rs = stmt.executeQuery("Select * from " + db_table);
DatabaseMetaData dbmd =cnx.getMetaData();cnx=Connection
for (i = 1; i <=numberOfColumns; i++) {
rscol = dbmd.getColumns(tableCatalog, tableSchema, db_table, columnName);
while (rscol.next()) {
autoInc = rscol.getString(12);returns "auto-increment" if column is in fact auto-increment
if (!autoInc.equals("")) colAutoInc=i;
}
}
http://docs.oracle.com/javase/7/docs/api/java/sql/DatabaseMetaData.html#getColumns%28java.lang.String,%20java.lang.String,%20java.lang.String,%20java.lang.String%29
It says the column #12 is REMARKS, which does not have much meaning
To retrieve primary key, there is a DatabaseMetaData.getPrimaryKeys() that does exactly that. http://docs.oracle.com/javase/7/docs/api/java/sql/DatabaseMetaData.html#getPrimaryKeys%28java.lang.String,%20java.lang.String,%20java.lang.String%29