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better output for explain

This commit is contained in:
Jan Steemann 2013-07-18 15:06:16 +02:00
parent 58b7a2ddf3
commit 05860edd2f
1 changed files with 13 additions and 2 deletions
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15
arangod/V8Server/v8-vocbase.cpp
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@ -3456,9 +3456,20 @@ static v8::Handle<v8::Value> JS_ExplainAhuacatl (v8::Arguments const& argv) {
AhuacatlTransaction<EmbeddableTransaction<V8TransactionContext> > trx(vocbase, resolver, context);
int res = trx.begin();
if (res != TRI_ERROR_NO_ERROR) {
TRI_V8_EXCEPTION_MESSAGE(scope, res, "cannot explain query");
// check if there is some error data registered in the transaction
const string errorData = trx.getErrorData();
if (errorData.empty()) {
// no error data. return a regular error message
TRI_V8_EXCEPTION_MESSAGE(scope, res, "cannot explain query");
}
else {
// there is specific error data. return a more tailored error message
const string errorMsg = "cannot explain query: " + string(TRI_errno_string(res)) + ": '" + errorData + "'";
return scope.Close(v8::ThrowException(TRI_CreateErrorObject(res, errorMsg)));
}
}
if ((performOptimisations && ! TRI_OptimiseQueryContextAql(context)) ||