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Posted to derby-commits@db.apache.org by ba...@apache.org on 2006/04/12 22:24:37 UTC
svn commit: r393593 [2/3] - in /db/derby/code/trunk/java:
engine/org/apache/derby/iapi/sql/compile/
engine/org/apache/derby/impl/sql/compile/
testing/org/apache/derbyTesting/functionTests/master/
testing/org/apache/derbyTesting/functionTests/tests/lang/
Modified: db/derby/code/trunk/java/testing/org/apache/derbyTesting/functionTests/master/predicatePushdown.out
URL: http://svn.apache.org/viewcvs/db/derby/code/trunk/java/testing/org/apache/derbyTesting/functionTests/master/predicatePushdown.out?rev=393593&r1=393592&r2=393593&view=diff
==============================================================================
--- db/derby/code/trunk/java/testing/org/apache/derbyTesting/functionTests/master/predicatePushdown.out (original)
+++ db/derby/code/trunk/java/testing/org/apache/derbyTesting/functionTests/master/predicatePushdown.out Wed Apr 12 13:24:27 2006
@@ -6,18 +6,7 @@
-- plans and we don't want the plans to differ from one machine
-- to another (which can happen if some machines are faster than
-- others when noTimeout is false).
--- Create the tables/views for DERBY-805 testing. For DERBY-805
--- we can tell if a predicate has been "pushed" by looking at
--- the query plan information for the tables in question: if the
--- table has an index on a column that is used as part of the
--- pushed predicate, then the optimizer will (for these tests)
--- do an Index scan instead of a Table scan. If the table does
--- not have such an index then the predicate will show up as a
--- "qualifier" for a Table scan. In all of these tests T3 and T4
--- have appropriate indexes, so if we push a predicate to either
--- of those tables we should see index scans. Neither T1 nor T2
--- has indexes, so if we push a predicate to either of those tables
--- we should see a qualifier in the table scan information.
+-- Create the basic tables/views for DERBY-805 testing.
CREATE TABLE "APP"."T1" ("I" INTEGER, "J" INTEGER);
0 rows inserted/updated/deleted
ij> insert into t1 values (1, 2), (2, 4), (3, 6), (4, 8), (5, 10);
@@ -28,93 +17,37 @@
5 rows inserted/updated/deleted
ij> CREATE TABLE "APP"."T3" ("A" INTEGER, "B" INTEGER);
0 rows inserted/updated/deleted
-ij> CREATE INDEX "APP"."T3_IX1" ON "APP"."T3" ("A");
-0 rows inserted/updated/deleted
-ij> CREATE INDEX "APP"."T3_IX2" ON "APP"."T3" ("B");
-0 rows inserted/updated/deleted
ij> insert into T3 values (1,1), (2,2), (3,3), (4,4), (6, 24),
(7, 28), (8, 32), (9, 36), (10, 40);
9 rows inserted/updated/deleted
ij> insert into t3 (a) values 11, 12, 13, 14, 15, 16, 17, 18, 19, 20;
10 rows inserted/updated/deleted
-ij> insert into t3 (a) values 21, 22, 23, 24, 25, 26, 27, 28, 29, 30;
-10 rows inserted/updated/deleted
-ij> insert into t3 (a) values 31, 32, 33, 34, 35, 36, 37, 38, 39, 40;
-10 rows inserted/updated/deleted
-ij> insert into t3 (a) values 41, 42, 43, 44, 45, 46, 47, 48, 49, 50;
-10 rows inserted/updated/deleted
-ij> insert into t3 (a) values 51, 52, 53, 54, 55, 56, 57, 58, 59, 60;
-10 rows inserted/updated/deleted
-ij> insert into t3 (a) values 61, 62, 63, 64, 65, 66, 67, 68, 69, 70;
-10 rows inserted/updated/deleted
-ij> insert into t3 (a) values 71, 72, 73, 74, 75, 76, 77, 78, 79, 80;
-10 rows inserted/updated/deleted
-ij> insert into t3 (a) values 81, 82, 83, 84, 85, 86, 87, 88, 89, 90;
-10 rows inserted/updated/deleted
-ij> insert into t3 (a) values 91, 92, 93, 94, 95, 96, 97, 98, 99, 100;
-10 rows inserted/updated/deleted
ij> update t3 set b = 2 * a where a > 10;
-90 rows inserted/updated/deleted
+10 rows inserted/updated/deleted
ij> CREATE TABLE "APP"."T4" ("A" INTEGER, "B" INTEGER);
0 rows inserted/updated/deleted
-ij> CREATE INDEX "APP"."T4_IX1" ON "APP"."T4" ("A");
-0 rows inserted/updated/deleted
-ij> CREATE INDEX "APP"."T4_IX2" ON "APP"."T4" ("B");
-0 rows inserted/updated/deleted
ij> insert into t4 values (3, 12), (4, 16);
2 rows inserted/updated/deleted
ij> insert into t4 (a) values 11, 12, 13, 14, 15, 16, 17, 18, 19, 20;
10 rows inserted/updated/deleted
-ij> insert into t4 (a) values 21, 22, 23, 24, 25, 26, 27, 28, 29, 30;
-10 rows inserted/updated/deleted
-ij> insert into t4 (a) values 31, 32, 33, 34, 35, 36, 37, 38, 39, 40;
-10 rows inserted/updated/deleted
-ij> insert into t4 (a) values 41, 42, 43, 44, 45, 46, 47, 48, 49, 50;
-10 rows inserted/updated/deleted
-ij> insert into t4 (a) values 51, 52, 53, 54, 55, 56, 57, 58, 59, 60;
-10 rows inserted/updated/deleted
-ij> insert into t4 (a) values 61, 62, 63, 64, 65, 66, 67, 68, 69, 70;
-10 rows inserted/updated/deleted
-ij> insert into t4 (a) values 71, 72, 73, 74, 75, 76, 77, 78, 79, 80;
-10 rows inserted/updated/deleted
-ij> insert into t4 (a) values 81, 82, 83, 84, 85, 86, 87, 88, 89, 90;
-10 rows inserted/updated/deleted
-ij> insert into t4 (a) values 91, 92, 93, 94, 95, 96, 97, 98, 99, 100;
-10 rows inserted/updated/deleted
ij> update t4 set b = 2 * a where a > 10;
-90 rows inserted/updated/deleted
-ij> CREATE TABLE "APP"."T5" ("I" INTEGER, "J" INTEGER);
-0 rows inserted/updated/deleted
-ij> insert into t5 values (5, 10);
-1 row inserted/updated/deleted
-ij> CREATE TABLE "APP"."T6" ("P" INTEGER, "Q" INTEGER);
-0 rows inserted/updated/deleted
-ij> insert into t5 values (2, 4), (4, 8);
-2 rows inserted/updated/deleted
-ij> CREATE TABLE "APP"."XX1" ("II" INTEGER NOT NULL, "JJ" CHAR(10),
- "MM" INTEGER, "OO" DOUBLE, "KK" BIGINT);
-0 rows inserted/updated/deleted
-ij> CREATE TABLE "APP"."YY1" ("II" INTEGER NOT NULL, "JJ" CHAR(10),
- "AA" INTEGER, "OO" DOUBLE, "KK" BIGINT);
-0 rows inserted/updated/deleted
-ij> ALTER TABLE "APP"."YY1" ADD CONSTRAINT "PK_YY1" PRIMARY KEY ("II");
-0 rows inserted/updated/deleted
-ij> ALTER TABLE "APP"."XX1" ADD CONSTRAINT "PK_XX1" PRIMARY KEY ("II");
-0 rows inserted/updated/deleted
+10 rows inserted/updated/deleted
ij> create view V1 as select i, j from T1 union select i,j from T2;
0 rows inserted/updated/deleted
ij> create view V2 as select a,b from T3 union select a,b from T4;
0 rows inserted/updated/deleted
-ij> create view xxunion as select all ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj,
kk, mm from xx1 union all select ii, jj, kk, mm from xx1;
-0 rows inserted/updated/deleted
-ij> create view yyunion as select all ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj,
kk, aa from yy1 union all select ii, jj, kk, aa from yy1;
-0 rows inserted/updated/deleted
-ij> call SYSCS_UTIL.SYSCS_SET_RUNTIMESTATISTICS(1);
+ij> -- Now that we have the basic tables and views for the tests, run
+-- some quick queries to make sure that the optimizer will still
+-- consider NOT pushing the predicates and will instead do a hash
+-- join. The optimizer should choose do this so long as doing so is
+-- the best choice, which usually means that we don't have indexes
+-- on the tables or else we have relatively small tables. Start
+-- by checking the case of small (~20 row) tables. We should
+-- see hash joins and table scans in ALL of these cases.
+call SYSCS_UTIL.SYSCS_SET_RUNTIMESTATISTICS(1);
0 rows inserted/updated/deleted
ij> maximumdisplaywidth 20000;
-ij> -- Predicate push-down should occur for next two queries. Thus we
--- we should see Index scans for T3 and T4--and this should be the
--- case regardless of the order of the FROM list.
+ij> -- Basic cases.
select * from V1, V2 where V1.j = V2.b;
I |J |A |B
-----------------------------------------------
@@ -126,9 +59,7 @@
Statement Name:
null
Statement Text:
- -- Predicate push-down should occur for next two queries. Thus we
--- we should see Index scans for T3 and T4--and this should be the
--- case regardless of the order of the FROM list.
+ -- Basic cases.
select * from V1, V2 where V1.j = V2.b
Parse Time: 0
Bind Time: 0
@@ -141,7 +72,7 @@
Begin Execution Timestamp : null
End Execution Timestamp : null
Statement Execution Plan Text:
-Nested Loop Join ResultSet:
+Hash Join ResultSet:
Number of opens = 1
Rows seen from the left = 7
Rows seen from the right = 2
@@ -220,125 +151,90 @@
null qualifiers:
None
Right result set:
- Sort ResultSet:
+ Hash Table ResultSet (10):
Number of opens = 7
- Rows input = 2
- Rows returned = 2
- Eliminate duplicates = true
- In sorted order = false
- Sort information:
- Number of rows input=0
- Number of rows output=0
+ Hash table size = 16
+ Hash key is column number 1
+ Rows seen = 21
+ Rows filtered = 0
constructor time (milliseconds) = 0
open time (milliseconds) = 0
next time (milliseconds) = 0
close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ next qualifiers:
+Column[0][0] Id: 1
+Operator: =
+Ordered nulls: false
+Unknown return value: false
+Negate comparison result: false
Source result set:
- Union ResultSet:
- Number of opens = 7
- Rows seen from the left = 2
- Rows seen from the right = 0
- Rows returned = 2
+ Sort ResultSet:
+ Number of opens = 1
+ Rows input = 31
+ Rows returned = 21
+ Eliminate duplicates = true
+ In sorted order = false
+ Sort information:
+ Number of rows input=31
+ Number of rows output=21
constructor time (milliseconds) = 0
open time (milliseconds) = 0
next time (milliseconds) = 0
close time (milliseconds) = 0
- Left result set:
- Project-Restrict ResultSet (10):
- Number of opens = 7
- Rows seen = 2
- Rows filtered = 0
- restriction = false
- projection = false
+ Source result set:
+ Union ResultSet:
+ Number of opens = 1
+ Rows seen from the left = 19
+ Rows seen from the right = 12
+ Rows returned = 31
constructor time (milliseconds) = 0
open time (milliseconds) = 0
next time (milliseconds) = 0
close time (milliseconds) = 0
- restriction time (milliseconds) = 0
- projection time (milliseconds) = 0
- Source result set:
- Index Row to Base Row ResultSet for T3:
- Number of opens = 7
- Rows seen = 2
- Columns accessed from heap = {0}
+ Left result set:
+ Table Scan ResultSet for T3 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 1
+ Rows seen = 19
+ Rows filtered = 0
+ Fetch Size = 1
constructor time (milliseconds) = 0
open time (milliseconds) = 0
next time (milliseconds) = 0
close time (milliseconds) = 0
- Index Scan ResultSet for T3 using index T3_IX2 at read committed isolation level using share row locking chosen by the optimizer
- Number of opens = 7
- Rows seen = 2
- Rows filtered = 0
- Fetch Size = 1
- constructor time (milliseconds) = 0
- open time (milliseconds) = 0
- next time (milliseconds) = 0
- close time (milliseconds) = 0
- next time in milliseconds/row = 0
- scan information:
- Bit set of columns fetched=All
- Number of columns fetched=2
- Number of deleted rows visited=0
- Number of pages visited=1
- Number of rows qualified=0
- Number of rows visited=1
- Scan type=btree
- Tree height=1
- start position:
- >= on first 1 column(s).
- Ordered null semantics on the following columns:
- stop position:
- > on first 1 column(s).
- Ordered null semantics on the following columns:
- qualifiers:
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of pages visited=1
+ Number of rows qualified=19
+ Number of rows visited=19
+ Scan type=heap
+ start position:
+null stop position:
+null qualifiers:
None
- Right result set:
- Project-Restrict ResultSet (13):
- Number of opens = 7
- Rows seen = 0
- Rows filtered = 0
- restriction = false
- projection = false
- constructor time (milliseconds) = 0
- open time (milliseconds) = 0
- next time (milliseconds) = 0
- close time (milliseconds) = 0
- restriction time (milliseconds) = 0
- projection time (milliseconds) = 0
- Source result set:
- Index Row to Base Row ResultSet for T4:
- Number of opens = 7
- Rows seen = 0
- Columns accessed from heap = {0}
+ Right result set:
+ Table Scan ResultSet for T4 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 1
+ Rows seen = 12
+ Rows filtered = 0
+ Fetch Size = 1
constructor time (milliseconds) = 0
open time (milliseconds) = 0
next time (milliseconds) = 0
close time (milliseconds) = 0
- Index Scan ResultSet for T4 using index T4_IX2 at read committed isolation level using share row locking chosen by the optimizer
- Number of opens = 7
- Rows seen = 0
- Rows filtered = 0
- Fetch Size = 1
- constructor time (milliseconds) = 0
- open time (milliseconds) = 0
- next time (milliseconds) = 0
- close time (milliseconds) = 0
- scan information:
- Bit set of columns fetched=All
- Number of columns fetched=2
- Number of deleted rows visited=0
- Number of pages visited=1
- Number of rows qualified=0
- Number of rows visited=1
- Scan type=btree
- Tree height=1
- start position:
- >= on first 1 column(s).
- Ordered null semantics on the following columns:
- stop position:
- > on first 1 column(s).
- Ordered null semantics on the following columns:
- qualifiers:
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of pages visited=1
+ Number of rows qualified=12
+ Number of rows visited=12
+ Scan type=heap
+ start position:
+null stop position:
+null qualifiers:
None
ij> select * from V2, V1 where V1.j = V2.b;
A |B |I |J
@@ -363,7 +259,7 @@
Begin Execution Timestamp : null
End Execution Timestamp : null
Statement Execution Plan Text:
-Project-Restrict ResultSet (14):
+Project-Restrict ResultSet (11):
Number of opens = 1
Rows seen = 2
Rows filtered = 0
@@ -376,7 +272,7 @@
restriction time (milliseconds) = 0
projection time (milliseconds) = 0
Source result set:
- Nested Loop Join ResultSet:
+ Hash Join ResultSet:
Number of opens = 1
Rows seen from the left = 7
Rows seen from the right = 2
@@ -455,145 +351,132 @@
null qualifiers:
None
Right result set:
- Sort ResultSet:
+ Hash Table ResultSet (10):
Number of opens = 7
- Rows input = 2
- Rows returned = 2
- Eliminate duplicates = true
- In sorted order = false
- Sort information:
- Number of rows input=0
- Number of rows output=0
+ Hash table size = 16
+ Hash key is column number 1
+ Rows seen = 21
+ Rows filtered = 0
constructor time (milliseconds) = 0
open time (milliseconds) = 0
next time (milliseconds) = 0
close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ next qualifiers:
+Column[0][0] Id: 1
+Operator: =
+Ordered nulls: false
+Unknown return value: false
+Negate comparison result: false
Source result set:
- Union ResultSet:
- Number of opens = 7
- Rows seen from the left = 2
- Rows seen from the right = 0
- Rows returned = 2
+ Sort ResultSet:
+ Number of opens = 1
+ Rows input = 31
+ Rows returned = 21
+ Eliminate duplicates = true
+ In sorted order = false
+ Sort information:
+ Number of rows input=31
+ Number of rows output=21
constructor time (milliseconds) = 0
open time (milliseconds) = 0
next time (milliseconds) = 0
close time (milliseconds) = 0
- Left result set:
- Project-Restrict ResultSet (10):
- Number of opens = 7
- Rows seen = 2
- Rows filtered = 0
- restriction = false
- projection = false
+ Source result set:
+ Union ResultSet:
+ Number of opens = 1
+ Rows seen from the left = 19
+ Rows seen from the right = 12
+ Rows returned = 31
constructor time (milliseconds) = 0
open time (milliseconds) = 0
next time (milliseconds) = 0
close time (milliseconds) = 0
- restriction time (milliseconds) = 0
- projection time (milliseconds) = 0
- Source result set:
- Index Row to Base Row ResultSet for T3:
- Number of opens = 7
- Rows seen = 2
- Columns accessed from heap = {0}
+ Left result set:
+ Table Scan ResultSet for T3 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 1
+ Rows seen = 19
+ Rows filtered = 0
+ Fetch Size = 1
constructor time (milliseconds) = 0
open time (milliseconds) = 0
next time (milliseconds) = 0
close time (milliseconds) = 0
- Index Scan ResultSet for T3 using index T3_IX2 at read committed isolation level using share row locking chosen by the optimizer
- Number of opens = 7
- Rows seen = 2
- Rows filtered = 0
- Fetch Size = 1
- constructor time (milliseconds) = 0
- open time (milliseconds) = 0
- next time (milliseconds) = 0
- close time (milliseconds) = 0
- next time in milliseconds/row = 0
- scan information:
- Bit set of columns fetched=All
- Number of columns fetched=2
- Number of deleted rows visited=0
- Number of pages visited=1
- Number of rows qualified=0
- Number of rows visited=1
- Scan type=btree
- Tree height=1
- start position:
- >= on first 1 column(s).
- Ordered null semantics on the following columns:
- stop position:
- > on first 1 column(s).
- Ordered null semantics on the following columns:
- qualifiers:
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of pages visited=1
+ Number of rows qualified=19
+ Number of rows visited=19
+ Scan type=heap
+ start position:
+null stop position:
+null qualifiers:
None
- Right result set:
- Project-Restrict ResultSet (13):
- Number of opens = 7
- Rows seen = 0
- Rows filtered = 0
- restriction = false
- projection = false
- constructor time (milliseconds) = 0
- open time (milliseconds) = 0
- next time (milliseconds) = 0
- close time (milliseconds) = 0
- restriction time (milliseconds) = 0
- projection time (milliseconds) = 0
- Source result set:
- Index Row to Base Row ResultSet for T4:
- Number of opens = 7
- Rows seen = 0
- Columns accessed from heap = {0}
+ Right result set:
+ Table Scan ResultSet for T4 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 1
+ Rows seen = 12
+ Rows filtered = 0
+ Fetch Size = 1
constructor time (milliseconds) = 0
open time (milliseconds) = 0
next time (milliseconds) = 0
close time (milliseconds) = 0
- Index Scan ResultSet for T4 using index T4_IX2 at read committed isolation level using share row locking chosen by the optimizer
- Number of opens = 7
- Rows seen = 0
- Rows filtered = 0
- Fetch Size = 1
- constructor time (milliseconds) = 0
- open time (milliseconds) = 0
- next time (milliseconds) = 0
- close time (milliseconds) = 0
- scan information:
- Bit set of columns fetched=All
- Number of columns fetched=2
- Number of deleted rows visited=0
- Number of pages visited=1
- Number of rows qualified=0
- Number of rows visited=1
- Scan type=btree
- Tree height=1
- start position:
- >= on first 1 column(s).
- Ordered null semantics on the following columns:
- stop position:
- > on first 1 column(s).
- Ordered null semantics on the following columns:
- qualifiers:
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of pages visited=1
+ Number of rows qualified=12
+ Number of rows visited=12
+ Scan type=heap
+ start position:
+null stop position:
+null qualifiers:
None
-ij> -- Changes for DERBY-805 don't affect non-join predicates (ex. "IN" or one-
--- sided predicates), but make sure things still behave--i.e. these queries
--- should still compile and execute without error, and there should be a
--- qualifier on T1 for the scalar predicate.
-select count(*) from V1, V2 where V1.i in (2,4);
-1
------------
-404
+ij> -- Nested unions.
+select * from
+ (select * from t1 union
+ select * from t2 union
+ select * from t1 union
+ select * from t2
+ ) x1,
+ (select * from t3 union
+ select * from t4 union
+ select * from t4
+ ) x2
+where x1.i = x2.a;
+I |J |A |B
+-----------------------------------------------
+1 |2 |1 |1
+2 |-4 |2 |2
+2 |4 |2 |2
+3 |6 |3 |3
+3 |6 |3 |12
+4 |-8 |4 |4
+4 |-8 |4 |16
+4 |8 |4 |4
+4 |8 |4 |16
ij> values SYSCS_UTIL.SYSCS_GET_RUNTIMESTATISTICS();
1
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-----------------------------------
Statement Name:
null
Statement Text:
- -- Changes for DERBY-805 don't affect non-join predicates (ex. "IN" or one-
--- sided predicates), but make sure things still behave--i.e. these queries
--- should still compile and execute without error, and there should be a
--- qualifier on T1 for the scalar predicate.
-select count(*) from V1, V2 where V1.i in (2,4)
+ -- Nested unions.
+select * from
+ (select * from t1 union
+ select * from t2 union
+ select * from t1 union
+ select * from t2
+ ) x1,
+ (select * from t3 union
+ select * from t4 union
+ select * from t4
+ ) x2
+where x1.i = x2.a
Parse Time: 0
Bind Time: 0
Optimize Time: 0
@@ -605,142 +488,1578 @@
Begin Execution Timestamp : null
End Execution Timestamp : null
Statement Execution Plan Text:
-Project-Restrict ResultSet (15):
+Hash Join ResultSet:
Number of opens = 1
-Rows seen = 1
+Rows seen from the left = 7
+Rows seen from the right = 9
Rows filtered = 0
-restriction = false
-projection = true
+Rows returned = 9
constructor time (milliseconds) = 0
open time (milliseconds) = 0
next time (milliseconds) = 0
close time (milliseconds) = 0
- restriction time (milliseconds) = 0
- projection time (milliseconds) = 0
-Source result set:
- Scalar Aggregate ResultSet:
+Left result set:
+ Sort ResultSet:
Number of opens = 1
- Rows input = 404
+ Rows input = 20
+ Rows returned = 7
+ Eliminate duplicates = true
+ In sorted order = false
+ Sort information:
+ Number of rows input=20
+ Number of rows output=7
constructor time (milliseconds) = 0
open time (milliseconds) = 0
next time (milliseconds) = 0
close time (milliseconds) = 0
- Index Key Optimization = false
Source result set:
- Project-Restrict ResultSet (14):
+ Union ResultSet:
Number of opens = 1
- Rows seen = 404
- Rows filtered = 0
- restriction = false
- projection = true
+ Rows seen from the left = 15
+ Rows seen from the right = 5
+ Rows returned = 20
constructor time (milliseconds) = 0
open time (milliseconds) = 0
next time (milliseconds) = 0
close time (milliseconds) = 0
- restriction time (milliseconds) = 0
- projection time (milliseconds) = 0
- Source result set:
- Nested Loop Join ResultSet:
+ Left result set:
+ Union ResultSet:
Number of opens = 1
- Rows seen from the left = 4
- Rows seen from the right = 404
- Rows filtered = 0
- Rows returned = 404
+ Rows seen from the left = 10
+ Rows seen from the right = 5
+ Rows returned = 15
constructor time (milliseconds) = 0
open time (milliseconds) = 0
next time (milliseconds) = 0
close time (milliseconds) = 0
Left result set:
- Project-Restrict ResultSet (9):
+ Union ResultSet:
Number of opens = 1
- Rows seen = 4
- Rows filtered = 0
- restriction = true
- projection = true
+ Rows seen from the left = 5
+ Rows seen from the right = 5
+ Rows returned = 10
constructor time (milliseconds) = 0
open time (milliseconds) = 0
next time (milliseconds) = 0
close time (milliseconds) = 0
- restriction time (milliseconds) = 0
- projection time (milliseconds) = 0
- Source result set:
- Sort ResultSet:
+ Left result set:
+ Table Scan ResultSet for T1 at read committed isolation level using share row locking chosen by the optimizer
Number of opens = 1
- Rows input = 4
- Rows returned = 4
- Eliminate duplicates = true
- In sorted order = false
- Sort information:
- Number of rows input=4
- Number of rows output=4
+ Rows seen = 5
+ Rows filtered = 0
+ Fetch Size = 1
constructor time (milliseconds) = 0
open time (milliseconds) = 0
next time (milliseconds) = 0
close time (milliseconds) = 0
- Source result set:
- Union ResultSet:
- Number of opens = 1
- Rows seen from the left = 2
- Rows seen from the right = 2
- Rows returned = 4
- constructor time (milliseconds) = 0
- open time (milliseconds) = 0
- next time (milliseconds) = 0
- close time (milliseconds) = 0
- Left result set:
- Project-Restrict ResultSet (6):
- Number of opens = 1
- Rows seen = 3
- Rows filtered = 1
- restriction = true
- projection = false
- constructor time (milliseconds) = 0
- open time (milliseconds) = 0
- next time (milliseconds) = 0
- close time (milliseconds) = 0
- restriction time (milliseconds) = 0
- projection time (milliseconds) = 0
- Source result set:
- Table Scan ResultSet for T1 at read committed isolation level using share row locking chosen by the optimizer
- Number of opens = 1
- Rows seen = 3
- Rows filtered = 0
- Fetch Size = 1
- constructor time (milliseconds) = 0
- open time (milliseconds) = 0
- next time (milliseconds) = 0
- close time (milliseconds) = 0
- next time in milliseconds/row = 0
- scan information:
- Bit set of columns fetched=All
- Number of columns fetched=2
- Number of pages visited=1
- Number of rows qualified=3
- Number of rows visited=5
- Scan type=heap
- start position:
-null stop position:
-null qualifiers:
-Column[0][0] Id: 0
-Operator: <
-Ordered nulls: false
-Unknown return value: true
-Negate comparison result: true
-Column[0][1] Id: 0
-Operator: <=
-Ordered nulls: false
-Unknown return value: false
-Negate comparison result: false
- Right result set:
- Project-Restrict ResultSet (8):
- Number of opens = 1
- Rows seen = 3
- Rows filtered = 1
- restriction = true
- projection = false
- constructor time (milliseconds) = 0
- open time (milliseconds) = 0
- next time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of pages visited=1
+ Number of rows qualified=5
+ Number of rows visited=5
+ Scan type=heap
+ start position:
+null stop position:
+null qualifiers:
+None
+ Right result set:
+ Table Scan ResultSet for T2 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 1
+ Rows seen = 5
+ Rows filtered = 0
+ Fetch Size = 1
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of pages visited=1
+ Number of rows qualified=5
+ Number of rows visited=5
+ Scan type=heap
+ start position:
+null stop position:
+null qualifiers:
+None
+ Right result set:
+ Table Scan ResultSet for T1 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 1
+ Rows seen = 5
+ Rows filtered = 0
+ Fetch Size = 1
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of pages visited=1
+ Number of rows qualified=5
+ Number of rows visited=5
+ Scan type=heap
+ start position:
+null stop position:
+null qualifiers:
+None
+ Right result set:
+ Table Scan ResultSet for T2 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 1
+ Rows seen = 5
+ Rows filtered = 0
+ Fetch Size = 1
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of pages visited=1
+ Number of rows qualified=5
+ Number of rows visited=5
+ Scan type=heap
+ start position:
+null stop position:
+null qualifiers:
+None
+Right result set:
+ Hash Table ResultSet (16):
+ Number of opens = 7
+ Hash table size = 19
+ Hash key is column number 0
+ Rows seen = 21
+ Rows filtered = 0
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ next qualifiers:
+Column[0][0] Id: 0
+Operator: =
+Ordered nulls: false
+Unknown return value: false
+Negate comparison result: false
+ Source result set:
+ Sort ResultSet:
+ Number of opens = 1
+ Rows input = 43
+ Rows returned = 21
+ Eliminate duplicates = true
+ In sorted order = false
+ Sort information:
+ Number of rows input=43
+ Number of rows output=21
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ Source result set:
+ Union ResultSet:
+ Number of opens = 1
+ Rows seen from the left = 31
+ Rows seen from the right = 12
+ Rows returned = 43
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ Left result set:
+ Union ResultSet:
+ Number of opens = 1
+ Rows seen from the left = 19
+ Rows seen from the right = 12
+ Rows returned = 31
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ Left result set:
+ Table Scan ResultSet for T3 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 1
+ Rows seen = 19
+ Rows filtered = 0
+ Fetch Size = 1
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of pages visited=1
+ Number of rows qualified=19
+ Number of rows visited=19
+ Scan type=heap
+ start position:
+null stop position:
+null qualifiers:
+None
+ Right result set:
+ Table Scan ResultSet for T4 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 1
+ Rows seen = 12
+ Rows filtered = 0
+ Fetch Size = 1
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of pages visited=1
+ Number of rows qualified=12
+ Number of rows visited=12
+ Scan type=heap
+ start position:
+null stop position:
+null qualifiers:
+None
+ Right result set:
+ Table Scan ResultSet for T4 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 1
+ Rows seen = 12
+ Rows filtered = 0
+ Fetch Size = 1
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of pages visited=1
+ Number of rows qualified=12
+ Number of rows visited=12
+ Scan type=heap
+ start position:
+null stop position:
+null qualifiers:
+None
+ij> -- UNION ALLs.
+select * from
+ (select * from t1 union all select * from t2) x1,
+ (select * from t3 union select * from t4) x2
+where x1.i = x2.a;
+I |J |A |B
+-----------------------------------------------
+1 |2 |1 |1
+2 |4 |2 |2
+3 |6 |3 |3
+3 |6 |3 |12
+4 |8 |4 |4
+4 |8 |4 |16
+1 |2 |1 |1
+2 |-4 |2 |2
+3 |6 |3 |3
+3 |6 |3 |12
+4 |-8 |4 |4
+4 |-8 |4 |16
+ij> values SYSCS_UTIL.SYSCS_GET_RUNTIMESTATISTICS();
+1
+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-----------------------------------
+Statement Name:
+ null
+Statement Text:
+ -- UNION ALLs.
+select * from
+ (select * from t1 union all select * from t2) x1,
+ (select * from t3 union select * from t4) x2
+where x1.i = x2.a
+Parse Time: 0
+Bind Time: 0
+Optimize Time: 0
+Generate Time: 0
+Compile Time: 0
+Execute Time: 0
+Begin Compilation Timestamp : null
+End Compilation Timestamp : null
+Begin Execution Timestamp : null
+End Execution Timestamp : null
+Statement Execution Plan Text:
+Hash Join ResultSet:
+Number of opens = 1
+Rows seen from the left = 10
+Rows seen from the right = 12
+Rows filtered = 0
+Rows returned = 12
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+Left result set:
+ Union ResultSet:
+ Number of opens = 1
+ Rows seen from the left = 5
+ Rows seen from the right = 5
+ Rows returned = 10
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ Left result set:
+ Table Scan ResultSet for T1 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 1
+ Rows seen = 5
+ Rows filtered = 0
+ Fetch Size = 1
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of pages visited=1
+ Number of rows qualified=5
+ Number of rows visited=5
+ Scan type=heap
+ start position:
+null stop position:
+null qualifiers:
+None
+ Right result set:
+ Table Scan ResultSet for T2 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 1
+ Rows seen = 5
+ Rows filtered = 0
+ Fetch Size = 1
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of pages visited=1
+ Number of rows qualified=5
+ Number of rows visited=5
+ Scan type=heap
+ start position:
+null stop position:
+null qualifiers:
+None
+Right result set:
+ Hash Table ResultSet (9):
+ Number of opens = 10
+ Hash table size = 19
+ Hash key is column number 0
+ Rows seen = 21
+ Rows filtered = 0
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ next qualifiers:
+Column[0][0] Id: 0
+Operator: =
+Ordered nulls: false
+Unknown return value: false
+Negate comparison result: false
+ Source result set:
+ Sort ResultSet:
+ Number of opens = 1
+ Rows input = 31
+ Rows returned = 21
+ Eliminate duplicates = true
+ In sorted order = false
+ Sort information:
+ Number of rows input=31
+ Number of rows output=21
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ Source result set:
+ Union ResultSet:
+ Number of opens = 1
+ Rows seen from the left = 19
+ Rows seen from the right = 12
+ Rows returned = 31
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ Left result set:
+ Table Scan ResultSet for T3 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 1
+ Rows seen = 19
+ Rows filtered = 0
+ Fetch Size = 1
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of pages visited=1
+ Number of rows qualified=19
+ Number of rows visited=19
+ Scan type=heap
+ start position:
+null stop position:
+null qualifiers:
+None
+ Right result set:
+ Table Scan ResultSet for T4 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 1
+ Rows seen = 12
+ Rows filtered = 0
+ Fetch Size = 1
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of pages visited=1
+ Number of rows qualified=12
+ Number of rows visited=12
+ Scan type=heap
+ start position:
+null stop position:
+null qualifiers:
+None
+ij> select * from
+ (select * from t1 union select * from t2) x1,
+ (select * from t3 union all select * from t4) x2
+where x1.i = x2.a;
+I |J |A |B
+-----------------------------------------------
+1 |2 |1 |1
+2 |-4 |2 |2
+2 |4 |2 |2
+3 |6 |3 |3
+3 |6 |3 |12
+4 |-8 |4 |4
+4 |-8 |4 |16
+4 |8 |4 |4
+4 |8 |4 |16
+ij> values SYSCS_UTIL.SYSCS_GET_RUNTIMESTATISTICS();
+1
+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-----------------------------------
+Statement Name:
+ null
+Statement Text:
+ select * from
+ (select * from t1 union select * from t2) x1,
+ (select * from t3 union all select * from t4) x2
+where x1.i = x2.a
+Parse Time: 0
+Bind Time: 0
+Optimize Time: 0
+Generate Time: 0
+Compile Time: 0
+Execute Time: 0
+Begin Compilation Timestamp : null
+End Compilation Timestamp : null
+Begin Execution Timestamp : null
+End Execution Timestamp : null
+Statement Execution Plan Text:
+Hash Join ResultSet:
+Number of opens = 1
+Rows seen from the left = 7
+Rows seen from the right = 9
+Rows filtered = 0
+Rows returned = 9
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+Left result set:
+ Sort ResultSet:
+ Number of opens = 1
+ Rows input = 10
+ Rows returned = 7
+ Eliminate duplicates = true
+ In sorted order = false
+ Sort information:
+ Number of rows input=10
+ Number of rows output=7
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ Source result set:
+ Union ResultSet:
+ Number of opens = 1
+ Rows seen from the left = 5
+ Rows seen from the right = 5
+ Rows returned = 10
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ Left result set:
+ Table Scan ResultSet for T1 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 1
+ Rows seen = 5
+ Rows filtered = 0
+ Fetch Size = 1
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of pages visited=1
+ Number of rows qualified=5
+ Number of rows visited=5
+ Scan type=heap
+ start position:
+null stop position:
+null qualifiers:
+None
+ Right result set:
+ Table Scan ResultSet for T2 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 1
+ Rows seen = 5
+ Rows filtered = 0
+ Fetch Size = 1
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of pages visited=1
+ Number of rows qualified=5
+ Number of rows visited=5
+ Scan type=heap
+ start position:
+null stop position:
+null qualifiers:
+None
+Right result set:
+ Hash Table ResultSet (9):
+ Number of opens = 7
+ Hash table size = 19
+ Hash key is column number 0
+ Rows seen = 31
+ Rows filtered = 0
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ next qualifiers:
+Column[0][0] Id: 0
+Operator: =
+Ordered nulls: false
+Unknown return value: false
+Negate comparison result: false
+ Source result set:
+ Union ResultSet:
+ Number of opens = 1
+ Rows seen from the left = 19
+ Rows seen from the right = 12
+ Rows returned = 31
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ Left result set:
+ Table Scan ResultSet for T3 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 1
+ Rows seen = 19
+ Rows filtered = 0
+ Fetch Size = 1
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of pages visited=1
+ Number of rows qualified=19
+ Number of rows visited=19
+ Scan type=heap
+ start position:
+null stop position:
+null qualifiers:
+None
+ Right result set:
+ Table Scan ResultSet for T4 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 1
+ Rows seen = 12
+ Rows filtered = 0
+ Fetch Size = 1
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of pages visited=1
+ Number of rows qualified=12
+ Number of rows visited=12
+ Scan type=heap
+ start position:
+null stop position:
+null qualifiers:
+None
+ij> select * from
+ (select * from t1 union all select * from t2) x1,
+ (select * from t3 union all select * from t4) x2
+where x1.i = x2.a;
+I |J |A |B
+-----------------------------------------------
+1 |2 |1 |1
+2 |4 |2 |2
+3 |6 |3 |3
+3 |6 |3 |12
+4 |8 |4 |4
+4 |8 |4 |16
+1 |2 |1 |1
+2 |-4 |2 |2
+3 |6 |3 |3
+3 |6 |3 |12
+4 |-8 |4 |4
+4 |-8 |4 |16
+ij> values SYSCS_UTIL.SYSCS_GET_RUNTIMESTATISTICS();
+1
+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-----------------------------------
+Statement Name:
+ null
+Statement Text:
+ select * from
+ (select * from t1 union all select * from t2) x1,
+ (select * from t3 union all select * from t4) x2
+where x1.i = x2.a
+Parse Time: 0
+Bind Time: 0
+Optimize Time: 0
+Generate Time: 0
+Compile Time: 0
+Execute Time: 0
+Begin Compilation Timestamp : null
+End Compilation Timestamp : null
+Begin Execution Timestamp : null
+End Execution Timestamp : null
+Statement Execution Plan Text:
+Hash Join ResultSet:
+Number of opens = 1
+Rows seen from the left = 10
+Rows seen from the right = 12
+Rows filtered = 0
+Rows returned = 12
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+Left result set:
+ Union ResultSet:
+ Number of opens = 1
+ Rows seen from the left = 5
+ Rows seen from the right = 5
+ Rows returned = 10
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ Left result set:
+ Table Scan ResultSet for T1 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 1
+ Rows seen = 5
+ Rows filtered = 0
+ Fetch Size = 1
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of pages visited=1
+ Number of rows qualified=5
+ Number of rows visited=5
+ Scan type=heap
+ start position:
+null stop position:
+null qualifiers:
+None
+ Right result set:
+ Table Scan ResultSet for T2 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 1
+ Rows seen = 5
+ Rows filtered = 0
+ Fetch Size = 1
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of pages visited=1
+ Number of rows qualified=5
+ Number of rows visited=5
+ Scan type=heap
+ start position:
+null stop position:
+null qualifiers:
+None
+Right result set:
+ Hash Table ResultSet (8):
+ Number of opens = 10
+ Hash table size = 19
+ Hash key is column number 0
+ Rows seen = 31
+ Rows filtered = 0
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ next qualifiers:
+Column[0][0] Id: 0
+Operator: =
+Ordered nulls: false
+Unknown return value: false
+Negate comparison result: false
+ Source result set:
+ Union ResultSet:
+ Number of opens = 1
+ Rows seen from the left = 19
+ Rows seen from the right = 12
+ Rows returned = 31
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ Left result set:
+ Table Scan ResultSet for T3 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 1
+ Rows seen = 19
+ Rows filtered = 0
+ Fetch Size = 1
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of pages visited=1
+ Number of rows qualified=19
+ Number of rows visited=19
+ Scan type=heap
+ start position:
+null stop position:
+null qualifiers:
+None
+ Right result set:
+ Table Scan ResultSet for T4 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 1
+ Rows seen = 12
+ Rows filtered = 0
+ Fetch Size = 1
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of pages visited=1
+ Number of rows qualified=12
+ Number of rows visited=12
+ Scan type=heap
+ start position:
+null stop position:
+null qualifiers:
+None
+ij> -- Now bump up the size of tables T3 and T4 to the point where
+-- use of indexes will cause optimizer to choose nested loop join
+-- (and push predicates) instead of hash join. The following
+-- insertions put roughly 50,000 rows into T3 and into T4.
+-- These numbers are somewhat arbitrary, but please note that
+-- reducing the number of rows in these two tables could cause the
+-- optimizer to choose to skip pushing and instead use a hash join
+-- for some of the test queries. That's not 'wrong' per se, but
+-- it's not what we want to test here...
+autocommit off;
+ij> insert into t3 (a) values 21, 22, 23, 24, 25, 26, 27, 28, 29, 30;
+10 rows inserted/updated/deleted
+ij> insert into t3 (a) values 31, 32, 33, 34, 35, 36, 37, 38, 39, 40;
+10 rows inserted/updated/deleted
+ij> insert into t3 (a) values 41, 42, 43, 44, 45, 46, 47, 48, 49, 50;
+10 rows inserted/updated/deleted
+ij> insert into t3 (a) values 51, 52, 53, 54, 55, 56, 57, 58, 59, 60;
+10 rows inserted/updated/deleted
+ij> insert into t3 (a) values 61, 62, 63, 64, 65, 66, 67, 68, 69, 70;
+10 rows inserted/updated/deleted
+ij> insert into t3 (a) values 71, 72, 73, 74, 75, 76, 77, 78, 79, 80;
+10 rows inserted/updated/deleted
+ij> insert into t3 (a) values 81, 82, 83, 84, 85, 86, 87, 88, 89, 90;
+10 rows inserted/updated/deleted
+ij> insert into t3 (a) values 91, 92, 93, 94, 95, 96, 97, 98, 99, 100;
+10 rows inserted/updated/deleted
+ij> update t3 set b = 2 * a where a > 20;
+80 rows inserted/updated/deleted
+ij> insert into t4 (a, b) (select a,b from t3 where a > 20);
+80 rows inserted/updated/deleted
+ij> insert into t4 (a, b) (select a,b from t3 where a > 20);
+80 rows inserted/updated/deleted
+ij> insert into t3 (a, b) (select a,b from t4 where a > 20);
+160 rows inserted/updated/deleted
+ij> insert into t4 (a, b) (select a,b from t3 where a > 20);
+240 rows inserted/updated/deleted
+ij> insert into t3 (a, b) (select a,b from t4 where a > 20);
+400 rows inserted/updated/deleted
+ij> insert into t4 (a, b) (select a,b from t3 where a > 20);
+640 rows inserted/updated/deleted
+ij> insert into t3 (a, b) (select a,b from t4 where a > 20);
+1040 rows inserted/updated/deleted
+ij> insert into t4 (a, b) (select a,b from t3 where a > 20);
+1680 rows inserted/updated/deleted
+ij> insert into t3 (a, b) (select a,b from t4 where a > 20);
+2720 rows inserted/updated/deleted
+ij> insert into t4 (a, b) (select a,b from t3 where a > 20);
+4400 rows inserted/updated/deleted
+ij> insert into t3 (a, b) (select a,b from t4 where a > 20);
+7120 rows inserted/updated/deleted
+ij> insert into t4 (a, b) (select a,b from t3 where a > 20);
+11520 rows inserted/updated/deleted
+ij> insert into t3 (a, b) (select a,b from t4 where a > 20);
+18640 rows inserted/updated/deleted
+ij> insert into t4 (a, b) (select a,b from t3 where a > 20);
+30160 rows inserted/updated/deleted
+ij> insert into t3 (a, b) (select a,b from t4 where a > 60);
+24400 rows inserted/updated/deleted
+ij> commit;
+ij> autocommit on;
+ij> -- See exactly how many rows we inserted, for sanity.
+select count(*) from t3;
+1
+-----------
+54579
+ij> select count(*) from t4;
+1
+-----------
+48812
+ij> -- At this point we create the indexes. Note that we intentionally
+-- create the indexes AFTER loading the data, in order ensure that the
+-- index statistics are correct. We need the stats to be correct in
+-- order for the optimizer to choose the correct plan (i.e. to push the
+-- join predicates where possible).
+CREATE INDEX "APP"."T3_IX1" ON "APP"."T3" ("A");
+0 rows inserted/updated/deleted
+ij> CREATE INDEX "APP"."T3_IX2" ON "APP"."T3" ("B");
+0 rows inserted/updated/deleted
+ij> CREATE INDEX "APP"."T4_IX1" ON "APP"."T4" ("A");
+0 rows inserted/updated/deleted
+ij> CREATE INDEX "APP"."T4_IX2" ON "APP"."T4" ("B");
+0 rows inserted/updated/deleted
+ij> -- Create the rest of objects used in this test.
+CREATE TABLE "APP"."T5" ("I" INTEGER, "J" INTEGER);
+0 rows inserted/updated/deleted
+ij> insert into t5 values (5, 10);
+1 row inserted/updated/deleted
+ij> CREATE TABLE "APP"."T6" ("P" INTEGER, "Q" INTEGER);
+0 rows inserted/updated/deleted
+ij> insert into t5 values (2, 4), (4, 8);
+2 rows inserted/updated/deleted
+ij> CREATE TABLE "APP"."XX1" ("II" INTEGER NOT NULL, "JJ" CHAR(10),
+ "MM" INTEGER, "OO" DOUBLE, "KK" BIGINT);
+0 rows inserted/updated/deleted
+ij> CREATE TABLE "APP"."YY1" ("II" INTEGER NOT NULL, "JJ" CHAR(10),
+ "AA" INTEGER, "OO" DOUBLE, "KK" BIGINT);
+0 rows inserted/updated/deleted
+ij> ALTER TABLE "APP"."YY1" ADD CONSTRAINT "PK_YY1" PRIMARY KEY ("II");
+0 rows inserted/updated/deleted
+ij> ALTER TABLE "APP"."XX1" ADD CONSTRAINT "PK_XX1" PRIMARY KEY ("II");
+0 rows inserted/updated/deleted
+ij> create view xxunion as select all ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj, kk, mm from xx1 union all select ii, jj,
kk, mm from xx1 union all select ii, jj, kk, mm from xx1;
+0 rows inserted/updated/deleted
+ij> create view yyunion as select all ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj, kk, aa from yy1 union all select ii, jj,
kk, aa from yy1 union all select ii, jj, kk, aa from yy1;
+0 rows inserted/updated/deleted
+ij> -- And finally, run more extensive tests using the larger tables
+-- that have indexes. In these tests the optimizer should consider
+-- pushing predicates where possible. We can tell if a predicate
+-- has been "pushed" by looking at the query plan information for
+-- the tables in question: if the table has an index on a column that
+-- is used as part of the pushed predicate, then the optimizer will
+-- (for these tests) do an Index scan instead of a Table scan. If
+-- the table does not have such an index then the predicate will show
+-- up as a "qualifier" for a Table scan. In all of these tests T3 and
+-- T4 have appropriate indexes, so if we push a predicate to either
+-- of those tables we should see index scans. Neither T1 nor T2
+-- has indexes, so if we push a predicate to either of those tables
+-- we should see a qualifier in the table scan information.
+-- Predicate push-down should occur for next two queries. Thus we
+-- we should see Index scans for T3 and T4--and this should be the
+-- case regardless of the order of the FROM list.
+select * from V1, V2 where V1.j = V2.b;
+I |J |A |B
+-----------------------------------------------
+1 |2 |2 |2
+2 |4 |4 |4
+ij> values SYSCS_UTIL.SYSCS_GET_RUNTIMESTATISTICS();
+1
+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-----------------------------------
+Statement Name:
+ null
+Statement Text:
+ -- And finally, run more extensive tests using the larger tables
+-- that have indexes. In these tests the optimizer should consider
+-- pushing predicates where possible. We can tell if a predicate
+-- has been "pushed" by looking at the query plan information for
+-- the tables in question: if the table has an index on a column that
+-- is used as part of the pushed predicate, then the optimizer will
+-- (for these tests) do an Index scan instead of a Table scan. If
+-- the table does not have such an index then the predicate will show
+-- up as a "qualifier" for a Table scan. In all of these tests T3 and
+-- T4 have appropriate indexes, so if we push a predicate to either
+-- of those tables we should see index scans. Neither T1 nor T2
+-- has indexes, so if we push a predicate to either of those tables
+-- we should see a qualifier in the table scan information.
+-- Predicate push-down should occur for next two queries. Thus we
+-- we should see Index scans for T3 and T4--and this should be the
+-- case regardless of the order of the FROM list.
+select * from V1, V2 where V1.j = V2.b
+Parse Time: 0
+Bind Time: 0
+Optimize Time: 0
+Generate Time: 0
+Compile Time: 0
+Execute Time: 0
+Begin Compilation Timestamp : null
+End Compilation Timestamp : null
+Begin Execution Timestamp : null
+End Execution Timestamp : null
+Statement Execution Plan Text:
+Nested Loop Join ResultSet:
+Number of opens = 1
+Rows seen from the left = 7
+Rows seen from the right = 2
+Rows filtered = 0
+Rows returned = 2
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+Left result set:
+ Sort ResultSet:
+ Number of opens = 1
+ Rows input = 10
+ Rows returned = 7
+ Eliminate duplicates = true
+ In sorted order = false
+ Sort information:
+ Number of rows input=10
+ Number of rows output=7
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ Source result set:
+ Union ResultSet:
+ Number of opens = 1
+ Rows seen from the left = 5
+ Rows seen from the right = 5
+ Rows returned = 10
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ Left result set:
+ Table Scan ResultSet for T1 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 1
+ Rows seen = 5
+ Rows filtered = 0
+ Fetch Size = 1
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of pages visited=1
+ Number of rows qualified=5
+ Number of rows visited=5
+ Scan type=heap
+ start position:
+null stop position:
+null qualifiers:
+None
+ Right result set:
+ Table Scan ResultSet for T2 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 1
+ Rows seen = 5
+ Rows filtered = 0
+ Fetch Size = 1
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of pages visited=1
+ Number of rows qualified=5
+ Number of rows visited=5
+ Scan type=heap
+ start position:
+null stop position:
+null qualifiers:
+None
+Right result set:
+ Sort ResultSet:
+ Number of opens = 7
+ Rows input = 2
+ Rows returned = 2
+ Eliminate duplicates = true
+ In sorted order = false
+ Sort information:
+ Number of rows input=0
+ Number of rows output=0
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ Source result set:
+ Union ResultSet:
+ Number of opens = 7
+ Rows seen from the left = 2
+ Rows seen from the right = 0
+ Rows returned = 2
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ Left result set:
+ Project-Restrict ResultSet (10):
+ Number of opens = 7
+ Rows seen = 2
+ Rows filtered = 0
+ restriction = false
+ projection = false
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ restriction time (milliseconds) = 0
+ projection time (milliseconds) = 0
+ Source result set:
+ Index Row to Base Row ResultSet for T3:
+ Number of opens = 7
+ Rows seen = 2
+ Columns accessed from heap = {0}
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ Index Scan ResultSet for T3 using index T3_IX2 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 7
+ Rows seen = 2
+ Rows filtered = 0
+ Fetch Size = 1
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of deleted rows visited=0
+ Number of pages visited=3
+ Number of rows qualified=0
+ Number of rows visited=1
+ Scan type=btree
+ Tree height=3
+ start position:
+ >= on first 1 column(s).
+ Ordered null semantics on the following columns:
+ stop position:
+ > on first 1 column(s).
+ Ordered null semantics on the following columns:
+ qualifiers:
+None
+ Right result set:
+ Project-Restrict ResultSet (13):
+ Number of opens = 7
+ Rows seen = 0
+ Rows filtered = 0
+ restriction = false
+ projection = false
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ restriction time (milliseconds) = 0
+ projection time (milliseconds) = 0
+ Source result set:
+ Index Row to Base Row ResultSet for T4:
+ Number of opens = 7
+ Rows seen = 0
+ Columns accessed from heap = {0}
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ Index Scan ResultSet for T4 using index T4_IX2 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 7
+ Rows seen = 0
+ Rows filtered = 0
+ Fetch Size = 1
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of deleted rows visited=0
+ Number of pages visited=3
+ Number of rows qualified=0
+ Number of rows visited=1
+ Scan type=btree
+ Tree height=3
+ start position:
+ >= on first 1 column(s).
+ Ordered null semantics on the following columns:
+ stop position:
+ > on first 1 column(s).
+ Ordered null semantics on the following columns:
+ qualifiers:
+None
+ij> select * from V2, V1 where V1.j = V2.b;
+A |B |I |J
+-----------------------------------------------
+2 |2 |1 |2
+4 |4 |2 |4
+ij> values SYSCS_UTIL.SYSCS_GET_RUNTIMESTATISTICS();
+1
+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-----------------------------------
+Statement Name:
+ null
+Statement Text:
+ select * from V2, V1 where V1.j = V2.b
+Parse Time: 0
+Bind Time: 0
+Optimize Time: 0
+Generate Time: 0
+Compile Time: 0
+Execute Time: 0
+Begin Compilation Timestamp : null
+End Compilation Timestamp : null
+Begin Execution Timestamp : null
+End Execution Timestamp : null
+Statement Execution Plan Text:
+Project-Restrict ResultSet (14):
+Number of opens = 1
+Rows seen = 2
+Rows filtered = 0
+restriction = false
+projection = true
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ restriction time (milliseconds) = 0
+ projection time (milliseconds) = 0
+Source result set:
+ Nested Loop Join ResultSet:
+ Number of opens = 1
+ Rows seen from the left = 7
+ Rows seen from the right = 2
+ Rows filtered = 0
+ Rows returned = 2
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ Left result set:
+ Sort ResultSet:
+ Number of opens = 1
+ Rows input = 10
+ Rows returned = 7
+ Eliminate duplicates = true
+ In sorted order = false
+ Sort information:
+ Number of rows input=10
+ Number of rows output=7
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ Source result set:
+ Union ResultSet:
+ Number of opens = 1
+ Rows seen from the left = 5
+ Rows seen from the right = 5
+ Rows returned = 10
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ Left result set:
+ Table Scan ResultSet for T1 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 1
+ Rows seen = 5
+ Rows filtered = 0
+ Fetch Size = 1
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of pages visited=1
+ Number of rows qualified=5
+ Number of rows visited=5
+ Scan type=heap
+ start position:
+null stop position:
+null qualifiers:
+None
+ Right result set:
+ Table Scan ResultSet for T2 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 1
+ Rows seen = 5
+ Rows filtered = 0
+ Fetch Size = 1
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of pages visited=1
+ Number of rows qualified=5
+ Number of rows visited=5
+ Scan type=heap
+ start position:
+null stop position:
+null qualifiers:
+None
+ Right result set:
+ Sort ResultSet:
+ Number of opens = 7
+ Rows input = 2
+ Rows returned = 2
+ Eliminate duplicates = true
+ In sorted order = false
+ Sort information:
+ Number of rows input=0
+ Number of rows output=0
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ Source result set:
+ Union ResultSet:
+ Number of opens = 7
+ Rows seen from the left = 2
+ Rows seen from the right = 0
+ Rows returned = 2
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ Left result set:
+ Project-Restrict ResultSet (10):
+ Number of opens = 7
+ Rows seen = 2
+ Rows filtered = 0
+ restriction = false
+ projection = false
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ restriction time (milliseconds) = 0
+ projection time (milliseconds) = 0
+ Source result set:
+ Index Row to Base Row ResultSet for T3:
+ Number of opens = 7
+ Rows seen = 2
+ Columns accessed from heap = {0}
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ Index Scan ResultSet for T3 using index T3_IX2 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 7
+ Rows seen = 2
+ Rows filtered = 0
+ Fetch Size = 1
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ next time in milliseconds/row = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of deleted rows visited=0
+ Number of pages visited=3
+ Number of rows qualified=0
+ Number of rows visited=1
+ Scan type=btree
+ Tree height=3
+ start position:
+ >= on first 1 column(s).
+ Ordered null semantics on the following columns:
+ stop position:
+ > on first 1 column(s).
+ Ordered null semantics on the following columns:
+ qualifiers:
+None
+ Right result set:
+ Project-Restrict ResultSet (13):
+ Number of opens = 7
+ Rows seen = 0
+ Rows filtered = 0
+ restriction = false
+ projection = false
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ restriction time (milliseconds) = 0
+ projection time (milliseconds) = 0
+ Source result set:
+ Index Row to Base Row ResultSet for T4:
+ Number of opens = 7
+ Rows seen = 0
+ Columns accessed from heap = {0}
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ Index Scan ResultSet for T4 using index T4_IX2 at read committed isolation level using share row locking chosen by the optimizer
+ Number of opens = 7
+ Rows seen = 0
+ Rows filtered = 0
+ Fetch Size = 1
+ constructor time (milliseconds) = 0
+ open time (milliseconds) = 0
+ next time (milliseconds) = 0
+ close time (milliseconds) = 0
+ scan information:
+ Bit set of columns fetched=All
+ Number of columns fetched=2
+ Number of deleted rows visited=0
+ Number of pages visited=3
+ Number of rows qualified=0
+ Number of rows visited=1
+ Scan type=btree
+ Tree height=3
+ start position:
+ >= on first 1 column(s).
+ Ordered null semantics on the following columns:
+ stop position:
+ > on first 1 column(s).
+ Ordered null semantics on the following columns:
+ qualifiers:
+None
+ij> -- Changes for DERBY-805 don't affect non-join predicates (ex. "IN" or one-
+-- sided predicates), but make sure things still behave--i.e. these queries
+-- should still compile and execute without error. We don't expect to see
+-- any predicates pushed to T3 nor T4.
+select count(*) from V1, V2 where V1.i in (2,4);
+1
+-----------
+404
+ij> values SYSCS_UTIL.SYSCS_GET_RUNTIMESTATISTICS();
+1
+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-----------------------------------
+Statement Name:
+ null
+Statement Text:
+ -- Changes for DERBY-805 don't affect non-join predicates (ex. "IN" or one-
+-- sided predicates), but make sure things still behave--i.e. these queries
+-- should still compile and execute without error. We don't expect to see
+-- any predicates pushed to T3 nor T4.
+select count(*) from V1, V2 where V1.i in (2,4)
+Parse Time: 0
+Bind Time: 0
+Optimize Time: 0
+Generate Time: 0
+Compile Time: 0
+Execute Time: 0
+Begin Compilation Timestamp : null
+End Compilation Timestamp : null
[... 2824 lines stripped ...]