public void getFields(
RowMetaInterface row,
String name,
RowMetaInterface[] info,
StepMeta nextStep,
VariableSpace space)
throws KettleStepException {
if (databaseMeta == null) return;
Database db = new Database(databaseMeta);
databases = new Database[] {db}; // Keep track of this one for cancelQuery
// First try without connecting to the database... (can be S L O W)
// See if it's in the cache...
RowMetaInterface add = null;
String realSQL = sql;
if (replacevars) realSQL = space.environmentSubstitute(realSQL);
try {
add = db.getQueryFields(realSQL, false);
} catch (KettleDatabaseException dbe) {
throw new KettleStepException(
Messages.getString("DynamicSQLRowMeta.Exception.UnableToDetermineQueryFields")
+ Const.CR
+ sql,
dbe); //$NON-NLS-1$
}
if (add != null) // Cache hit, just return it this...
{
for (int i = 0; i < add.size(); i++) {
ValueMetaInterface v = add.getValueMeta(i);
v.setOrigin(name);
}
row.addRowMeta(add);
} else
// No cache hit, connect to the database, do it the hard way...
try {
db.connect();
add = db.getQueryFields(realSQL, false);
for (int i = 0; i < add.size(); i++) {
ValueMetaInterface v = add.getValueMeta(i);
v.setOrigin(name);
}
row.addRowMeta(add);
db.disconnect();
} catch (KettleDatabaseException dbe) {
throw new KettleStepException(
Messages.getString("DynamicSQLRowMeta.Exception.ErrorObtainingFields"),
dbe); //$NON-NLS-1$
}
}
public void analyseImpact(
List<DatabaseImpact> impact,
TransMeta transMeta,
StepMeta stepMeta,
RowMetaInterface prev,
String[] input,
String[] output,
RowMetaInterface info)
throws KettleStepException {
RowMetaInterface out = prev.clone();
getFields(
out,
stepMeta.getName(),
new RowMetaInterface[] {
info,
},
null,
transMeta);
if (out != null) {
for (int i = 0; i < out.size(); i++) {
ValueMetaInterface outvalue = out.getValueMeta(i);
DatabaseImpact di =
new DatabaseImpact(
DatabaseImpact.TYPE_IMPACT_READ,
transMeta.getName(),
stepMeta.getName(),
databaseMeta.getDatabaseName(),
"", //$NON-NLS-1$
outvalue.getName(),
outvalue.getName(),
stepMeta.getName(),
sql,
Messages.getString("DynamicSQLRowMeta.DatabaseImpact.Title") // $NON-NLS-1$
);
impact.add(di);
}
}
}
