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Enhance EXPLAIN QUERY PLAN to report the generation of constant rows using

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VALUES or just a SELECT without FROM.

FossilOrigin-Name: c75eee69fa8a9b56ee58a4cc539e80cc982f43390dc3a357344d58479dd89a41
This commit is contained in:
drh
2018-05-03 01:37:13 +00:00
parent cdf88760da
commit fa16f5d9d6
8 changed files with 35 additions and 25 deletions
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3
test/with3.test
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@ -83,6 +83,7 @@ ifcapable analyze {
QUERY PLAN
|--MATERIALIZE xxxxxx
| |--SETUP
| | `--SCAN CONSTANT ROW
| `--RECURSIVE STEP
| `--SCAN TABLE cnt
|--SCAN SUBQUERY xxxxxx
@ -96,6 +97,7 @@ ifcapable analyze {
QUERY PLAN
|--MATERIALIZE xxxxxx
| |--SETUP
| | `--SCAN CONSTANT ROW
| `--RECURSIVE STEP
| `--SCAN TABLE cnt
|--SCAN TABLE y1
@ -117,6 +119,7 @@ do_eqp_test 3.2.2 {
QUERY PLAN
|--MATERIALIZE xxxxxx
| |--SETUP
| | |--SCAN CONSTANT ROW
| | `--SCALAR SUBQUERY
| | `--SCAN TABLE w2
| `--RECURSIVE STEP