Examples of com.foundationdb.server.explain.CompoundExplainer.addAttribute()

            TableName tableName = aisColumn.getTable().getName();
            explainer.addAttribute(Label.TABLE_SCHEMA,
                                   PrimitiveExplainer.getInstance(tableName.getSchemaName()));
            explainer.addAttribute(Label.TABLE_NAME,
                                   PrimitiveExplainer.getInstance(tableName.getTableName()));
            explainer.addAttribute(Label.COLUMN_NAME,
                                   PrimitiveExplainer.getInstance(aisColumn.getName()));
        }
        explainContext.putExtraInfo(expression, explainer);
    }

                     PrimitiveExplainer.getInstance(tableName.getTableName()));
            for (int i = 0; i < plan.ncols; i++) {
                atts.put(Label.COLUMN_NAME,
                         PrimitiveExplainer.getInstance(foreignKey.getReferencingColumns().get(i).getName()));
                CompoundExplainer var = new CompoundExplainer(Type.VARIABLE);
                var.addAttribute(Label.BINDING_POSITION,
                                 PrimitiveExplainer.getInstance(plan.ncols + i));
                atts.put(Label.EXPRESSIONS, var);
            }
            context.putExtraInfo(plan.plannable, 
                                 new CompoundExplainer(Type.EXTRA_INFO, atts));

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