Could anyone please tell me how to use all the options of explain in Postgresql 9.
http://www.postgresql.org/docs/9.0/static/sql-explain.html I can use EXPLAIN ANALYZE.
FORMAT:
explain (format yaml) select * from tab1;
QUERY PLAN
---------------------------------------
- Plan: +
Node Type: "Seq Scan" +
Relation Name: "tab1"+
Alias: "tab1" +
Startup Cost: 0.00 +
Total Cost: 21558.94 +
Plan Rows: 1688234 +
Plan Width: 333
(1 row)
But
explain (format yaml) analyze select * from tab1;
ERROR: syntax error at or near "analyze"
LINE 1: explain (format yaml) analyze select * from tab1
BUFFERS:
explain (buffers true) select * from tab1;
ERROR: EXPLAIN option BUFFERS requires ANALYZE
But
explain (buffers true) analyze select * from tab1;
ERROR: syntax error at or near "analyze"
LINE 1: explain (buffers true) analyze select * from tab1...
Same for COSTS.
Does any of our experts use these options? If yes, please tell me how.
Thanks.
