diff --git a/contrib/auto_explain/auto_explain.c b/contrib/auto_explain/auto_explain.c
index b33b2211ca..d5fa6ac2d3 100644
--- a/contrib/auto_explain/auto_explain.c
+++ b/contrib/auto_explain/auto_explain.c
@@ -301,6 +301,7 @@ explain_ExecutorEnd(QueryDesc *queryDesc)
es.verbose = auto_explain_log_verbose;
es.buffers = (es.analyze && auto_explain_log_buffers);
es.timing = (es.analyze && auto_explain_log_timing);
+ es.summary = es.analyze;
es.format = auto_explain_log_format;
ExplainBeginOutput(&es);
diff --git a/doc/src/sgml/perform.sgml b/doc/src/sgml/perform.sgml
index 94c11adaa4..5a087fbe6a 100644
--- a/doc/src/sgml/perform.sgml
+++ b/doc/src/sgml/perform.sgml
@@ -89,7 +89,6 @@ EXPLAIN SELECT * FROM tenk1;
QUERY PLAN
-------------------------------------------------------------
Seq Scan on tenk1 (cost=0.00..458.00 rows=10000 width=244)
- Planning time: 0.113 ms
@@ -162,12 +161,6 @@ EXPLAIN SELECT * FROM tenk1;
actually returned, updated, or deleted by the query.
-
- The Planning time shown is the time it took to generate
- the query plan from the parsed query and optimize it. It does not include
- rewriting and parsing.
-
-
Returning to our example:
@@ -177,7 +170,6 @@ EXPLAIN SELECT * FROM tenk1;
QUERY PLAN
-------------------------------------------------------------
Seq Scan on tenk1 (cost=0.00..458.00 rows=10000 width=244)
- Planning time: 0.113 ms
@@ -206,7 +198,6 @@ EXPLAIN SELECT * FROM tenk1 WHERE unique1 < 7000;
------------------------------------------------------------
Seq Scan on tenk1 (cost=0.00..483.00 rows=7001 width=244)
Filter: (unique1 < 7000)
- Planning time: 0.104 ms
Notice that the EXPLAIN output shows the WHERE
@@ -243,7 +234,6 @@ EXPLAIN SELECT * FROM tenk1 WHERE unique1 < 100;
Recheck Cond: (unique1 < 100)
-> Bitmap Index Scan on tenk1_unique1 (cost=0.00..5.04 rows=101 width=0)
Index Cond: (unique1 < 100)
- Planning time: 0.093 ms
Here the planner has decided to use a two-step plan: the child plan
@@ -272,7 +262,6 @@ EXPLAIN SELECT * FROM tenk1 WHERE unique1 < 100 AND stringu1 = 'xxx';
Filter: (stringu1 = 'xxx'::name)
-> Bitmap Index Scan on tenk1_unique1 (cost=0.00..5.04 rows=101 width=0)
Index Cond: (unique1 < 100)
- Planning time: 0.089 ms
The added condition stringu1 = 'xxx' reduces the
@@ -294,7 +283,6 @@ EXPLAIN SELECT * FROM tenk1 WHERE unique1 = 42;
-----------------------------------------------------------------------------
Index Scan using tenk1_unique1 on tenk1 (cost=0.29..8.30 rows=1 width=244)
Index Cond: (unique1 = 42)
- Planning time: 0.076 ms
In this type of plan the table rows are fetched in index order, which
@@ -323,7 +311,6 @@ EXPLAIN SELECT * FROM tenk1 WHERE unique1 < 100 AND unique2 > 9000;
Index Cond: (unique1 < 100)
-> Bitmap Index Scan on tenk1_unique2 (cost=0.00..19.78 rows=999 width=0)
Index Cond: (unique2 > 9000)
- Planning time: 0.094 ms
But this requires visiting both indexes, so it's not necessarily a win
@@ -344,7 +331,6 @@ EXPLAIN SELECT * FROM tenk1 WHERE unique1 < 100 AND unique2 > 9000 LIMIT 2
-> Index Scan using tenk1_unique2 on tenk1 (cost=0.29..71.27 rows=10 width=244)
Index Cond: (unique2 > 9000)
Filter: (unique1 < 100)
- Planning time: 0.087 ms
@@ -378,7 +364,6 @@ WHERE t1.unique1 < 10 AND t1.unique2 = t2.unique2;
Index Cond: (unique1 < 10)
-> Index Scan using tenk2_unique2 on tenk2 t2 (cost=0.29..7.91 rows=1 width=244)
Index Cond: (unique2 = t1.unique2)
- Planning time: 0.117 ms
@@ -430,7 +415,6 @@ WHERE t1.unique1 < 10 AND t2.unique2 < 10 AND t1.hundred < t2.hundred;
-> Materialize (cost=0.29..8.51 rows=10 width=244)
-> Index Scan using tenk2_unique2 on tenk2 t2 (cost=0.29..8.46 rows=10 width=244)
Index Cond: (unique2 < 10)
- Planning time: 0.119 ms
The condition t1.hundred < t2.hundred can't be
@@ -478,7 +462,6 @@ WHERE t1.unique1 < 100 AND t1.unique2 = t2.unique2;
Recheck Cond: (unique1 < 100)
-> Bitmap Index Scan on tenk1_unique1 (cost=0.00..5.04 rows=101 width=0)
Index Cond: (unique1 < 100)
- Planning time: 0.182 ms
@@ -509,7 +492,6 @@ WHERE t1.unique1 < 100 AND t1.unique2 = t2.unique2;
-> Sort (cost=197.83..200.33 rows=1000 width=244)
Sort Key: t2.unique2
-> Seq Scan on onek t2 (cost=0.00..148.00 rows=1000 width=244)
- Planning time: 0.195 ms
@@ -546,7 +528,6 @@ WHERE t1.unique1 < 100 AND t1.unique2 = t2.unique2;
-> Index Scan using tenk1_unique2 on tenk1 t1 (cost=0.29..656.28 rows=101 width=244)
Filter: (unique1 < 100)
-> Index Scan using onek_unique2 on onek t2 (cost=0.28..224.79 rows=1000 width=244)
- Planning time: 0.176 ms
which shows that the planner thinks that sorting onek by
@@ -780,6 +761,12 @@ ROLLBACK;
decisions.
+
+ The Planning time shown by EXPLAIN
+ ANALYZE is the time it took to generate the query plan from the
+ parsed query and optimize it. It does not include parsing or rewriting.
+
+
The Execution time shown by EXPLAIN
ANALYZE includes executor start-up and shut-down time, as well
diff --git a/doc/src/sgml/ref/explain.sgml b/doc/src/sgml/ref/explain.sgml
index 72776a0fde..f14a58dfc6 100644
--- a/doc/src/sgml/ref/explain.sgml
+++ b/doc/src/sgml/ref/explain.sgml
@@ -145,8 +145,8 @@ ROLLBACK;
Include information on the estimated startup and total cost of each
plan node, as well as the estimated number of rows and the estimated
- width of each row. Also, include the time spent planning the query,
- if available. This parameter defaults to TRUE.
+ width of each row.
+ This parameter defaults to TRUE.
@@ -291,8 +291,7 @@ EXPLAIN SELECT * FROM foo;
QUERY PLAN
---------------------------------------------------------
Seq Scan on foo (cost=0.00..155.00 rows=10000 width=4)
- Planning time: 0.114 ms
-(2 rows)
+(1 row)
@@ -312,8 +311,7 @@ EXPLAIN (FORMAT JSON) SELECT * FROM foo;
"Total Cost": 155.00, +
"Plan Rows": 10000, +
"Plan Width": 4 +
- }. +
- "Planning Time": 0.114 +
+ } +
} +
]
(1 row)
@@ -332,8 +330,7 @@ EXPLAIN SELECT * FROM foo WHERE i = 4;
--------------------------------------------------------------
Index Scan using fi on foo (cost=0.00..5.98 rows=1 width=4)
Index Cond: (i = 4)
- Planning time: 0.073 ms
-(3 rows)
+(2 rows)
@@ -353,8 +350,7 @@ EXPLAIN (FORMAT YAML) SELECT * FROM foo WHERE i='4';
Total Cost: 5.98 +
Plan Rows: 1 +
Plan Width: 4 +
- Index Cond: "(i = 4)" +
- Planning Time: 0.073
+ Index Cond: "(i = 4)"
(1 row)
@@ -386,7 +382,6 @@ EXPLAIN SELECT sum(i) FROM foo WHERE i < 10;
Aggregate (cost=23.93..23.93 rows=1 width=4)
-> Index Scan using fi on foo (cost=0.00..23.92 rows=6 width=4)
Index Cond: (i < 10)
- Planning time: 0.088 ms
(3 rows)
@@ -410,7 +405,7 @@ EXPLAIN ANALYZE EXECUTE query(100, 200);
Index Cond: ((id > $1) AND (id < $2))
Planning time: 0.197 ms
Execution time: 0.225 ms
-(5 rows)
+(6 rows)
diff --git a/src/backend/commands/explain.c b/src/backend/commands/explain.c
index 387d263e87..3fcc1ddc69 100644
--- a/src/backend/commands/explain.c
+++ b/src/backend/commands/explain.c
@@ -191,6 +191,9 @@ ExplainQuery(ExplainStmt *stmt, const char *queryString,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("EXPLAIN option TIMING requires ANALYZE")));
+ /* currently, summary option is not exposed to users; just set it */
+ es.summary = es.analyze;
+
/*
* Parse analysis was done already, but we still have to run the rule
* rewriter. We do not do AcquireRewriteLocks: we assume the query either
@@ -431,7 +434,8 @@ ExplainOnePlan(PlannedStmt *plannedstmt, IntoClause *into, ExplainState *es,
/*
* We always collect timing for the entire statement, even when node-level
- * timing is off, so we don't look at es->timing here.
+ * timing is off, so we don't look at es->timing here. (We could skip
+ * this if !es->summary, but it's hardly worth the complication.)
*/
INSTR_TIME_SET_CURRENT(starttime);
@@ -493,7 +497,7 @@ ExplainOnePlan(PlannedStmt *plannedstmt, IntoClause *into, ExplainState *es,
/* Create textual dump of plan tree */
ExplainPrintPlan(es, queryDesc);
- if (es->costs && planduration)
+ if (es->summary && planduration)
{
double plantime = INSTR_TIME_GET_DOUBLE(*planduration);
@@ -526,7 +530,7 @@ ExplainOnePlan(PlannedStmt *plannedstmt, IntoClause *into, ExplainState *es,
totaltime += elapsed_time(&starttime);
- if (es->analyze)
+ if (es->summary)
{
if (es->format == EXPLAIN_FORMAT_TEXT)
appendStringInfo(es->str, "Execution time: %.3f ms\n",
diff --git a/src/include/commands/explain.h b/src/include/commands/explain.h
index 3488be39c3..d56beaac15 100644
--- a/src/include/commands/explain.h
+++ b/src/include/commands/explain.h
@@ -30,9 +30,10 @@ typedef struct ExplainState
/* options */
bool verbose; /* be verbose */
bool analyze; /* print actual times */
- bool costs; /* print costs */
+ bool costs; /* print estimated costs */
bool buffers; /* print buffer usage */
- bool timing; /* print timing */
+ bool timing; /* print detailed node timing */
+ bool summary; /* print total planning and execution timing */
ExplainFormat format; /* output format */
/* other states */
PlannedStmt *pstmt; /* top of plan */