com.iscobol.rts_n

Interface EsqlPrepareHandler_n

public interface EsqlPrepareHandler_n

The aim of this interface is to to provide an entry point to customize prepared ESQL statements before they're executed.
Use EsqlPrepareHandler_n instead of EsqlPrepareHandler if your programs are compiled with the -cp option.

Here is a sample class that replaces SYSIBM.SYSDUMMY1 with DUAL in order to move prepared ESQL written for DB2 to Oracle:

import com.iscobol.types_n.CobolVar;
import com.iscobol.rts_n.EsqlPrepareHandler_n;

public class ChangeQuery implements EsqlPrepareHandler_n {

  public void queryDecoder(CobolVar query) {
      String db2Query = query.toString();
      System.out.println(db2Query);
      String oraQuery = db2Query.replaceAll("(?i)sysibm\\.sysdummy1", "dual");
      System.out.println(oraQuery);
      query.set(oraQuery);
  }
}

To install this class in your runtime session, you will set:

    iscobol.esql.prepare_handler=ChangeQuery

Method Summary

Modifier and Type	Method and Description
void	queryDecoder(CobolVar query) Receives the query text and allows you to change this text.

Method Detail

queryDecoder

void queryDecoder(CobolVar query)

Receives the query text and allows you to change this text.
This method is invoked automatically between an EXEC SQL PREPARE and the next EXEC SQL EXECUTE as well as during an EXEC SQL EXECUTE IMMEDIATE

Parameters:

query - the query that was prepared and is about to be executed