Expose a routine to print triggers during EXPLAIN ANALYZE

This is so that auto_explain can use it.

Kyotaro HORIGUCHI

diff --git a/src/backend/commands/explain.c b/src/backend/commands/explain.c
index e604be31f9d741dc39835bd7c1526419d8034220..0dba9283f1ce2689439b49feec5d722590243908 100644 (file)
--- a/src/backend/commands/explain.c
+++ b/src/backend/commands/explain.c
@@ -486,29 +486,7 @@ ExplainOnePlan(PlannedStmt *plannedstmt, IntoClause *into, ExplainState *es,
 
    /* Print info about runtime of triggers */
    if (es->analyze)
-   {
-       ResultRelInfo *rInfo;
-       bool        show_relname;
-       int         numrels = queryDesc->estate->es_num_result_relations;
-       List       *targrels = queryDesc->estate->es_trig_target_relations;
-       int         nr;
-       ListCell   *l;
-
-       ExplainOpenGroup("Triggers", "Triggers", false, es);
-
-       show_relname = (numrels > 1 || targrels != NIL);
-       rInfo = queryDesc->estate->es_result_relations;
-       for (nr = 0; nr < numrels; rInfo++, nr++)
-           report_triggers(rInfo, show_relname, es);
-
-       foreach(l, targrels)
-       {
-           rInfo = (ResultRelInfo *) lfirst(l);
-           report_triggers(rInfo, show_relname, es);
-       }
-
-       ExplainCloseGroup("Triggers", "Triggers", false, es);
-   }
+       ExplainPrintTriggers(es, queryDesc);
 
    /*
     * Close down the query and free resources.  Include time for this in the
@@ -564,6 +542,42 @@ ExplainPrintPlan(ExplainState *es, QueryDesc *queryDesc)
    ExplainNode(queryDesc->planstate, NIL, NULL, NULL, es);
 }
 
+/*
+ * ExplainPrintTriggers -
+
+ *   convert a QueryDesc's trigger statistics to text and append it to
+ *   es->str
+ *
+ * The caller should have set up the options fields of *es, as well as
+ * initializing the output buffer es->str. Other fields in *es are
+ * initialized here.
+ */
+void
+ExplainPrintTriggers(ExplainState *es, QueryDesc *queryDesc)
+{
+   ResultRelInfo *rInfo;
+   bool        show_relname;
+   int         numrels = queryDesc->estate->es_num_result_relations;
+   List       *targrels = queryDesc->estate->es_trig_target_relations;
+   int         nr;
+   ListCell   *l;
+
+   ExplainOpenGroup("Triggers", "Triggers", false, es);
+
+   show_relname = (numrels > 1 || targrels != NIL);
+   rInfo = queryDesc->estate->es_result_relations;
+   for (nr = 0; nr < numrels; rInfo++, nr++)
+       report_triggers(rInfo, show_relname, es);
+
+   foreach(l, targrels)
+   {
+       rInfo = (ResultRelInfo *) lfirst(l);
+       report_triggers(rInfo, show_relname, es);
+   }
+
+   ExplainCloseGroup("Triggers", "Triggers", false, es);
+}
+
 /*
  * ExplainQueryText -
  *   add a "Query Text" node that contains the actual text of the query

diff --git a/src/include/commands/explain.h b/src/include/commands/explain.h
index 9e71206b505c1b801b12aca458277235be65bfdd..e097710ddddae958bc5f040e968cfeced7c5d2b2 100644 (file)
--- a/src/include/commands/explain.h
+++ b/src/include/commands/explain.h
@@ -71,6 +71,7 @@ extern void ExplainOnePlan(PlannedStmt *plannedstmt, IntoClause *into,
               const char *queryString, ParamListInfo params);
 
 extern void ExplainPrintPlan(ExplainState *es, QueryDesc *queryDesc);
+extern void ExplainPrintTriggers(ExplainState *es, QueryDesc *queryDesc);
 
 extern void ExplainQueryText(ExplainState *es, QueryDesc *queryDesc);