distinctelimination.out

derby database source code.good for you.

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: 
Sort ResultSet:
Number of opens = 1
Rows input = 9
Rows returned = 3
Eliminate duplicates = true
In sorted order = false
Sort information: 
	Number of rows input=9
	Number of rows output=3
	constructor time (milliseconds) = 0
	open time (milliseconds) = 0
	next time (milliseconds) = 0
	close time (milliseconds) = 0
Source result set:
	Table Scan ResultSet for TWO at serializable isolation level using share table locking chosen by the optimizer
	Number of opens = 1
	Rows seen = 9
	Rows filtered = 0
	Fetch Size = 16
		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={1, 2}
		Number of columns fetched=2
		Number of pages visited=1
		Number of rows qualified=9
		Number of rows visited=9
		Scan type=heap
		start position: 
null		stop position: 
null		qualifiers:
None
ij> -- more than one table in the select list
select distinct a.c1, b.c1 from one a, two b where a.c1 = b.c1 and b.c2 =1;
C1         |C1         
-----------------------
1          |1          
2          |2          
3          |3          
ij> -- Following runtime statistics output should have Eliminate duplicates = true
values SYSCS_UTIL.SYSCS_GET_RUNTIMESTATISTICS();
1                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Statement Name: 
	null
Statement Text: 
	-- more than one table in the select list
select distinct a.c1, b.c1 from one a, two b where a.c1 = b.c1 and b.c2 =1
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: 
Sort ResultSet:
Number of opens = 1
Rows input = 9
Rows returned = 3
Eliminate duplicates = true
In sorted order = false
Sort information: 
	Number of rows input=9
	Number of rows output=3
	constructor time (milliseconds) = 0
	open time (milliseconds) = 0
	next time (milliseconds) = 0
	close time (milliseconds) = 0
Source result set:
	Project-Restrict ResultSet (5):
	Number of opens = 1
	Rows seen = 9
	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 Exists Join ResultSet:
		Number of opens = 1
		Rows seen from the left = 9
		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:
			Table Scan ResultSet for TWO at serializable isolation level using share table locking chosen by the optimizer
			Number of opens = 1
			Rows seen = 9
			Rows filtered = 0
			Fetch Size = 16
				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={0, 1}
				Number of columns fetched=2
				Number of pages visited=1
				Number of rows qualified=9
				Number of rows visited=9
				Scan type=heap
				start position: 
null				stop position: 
null				qualifiers:
Column[0][0] Id: 1
Operator: =
Ordered nulls: false
Unknown return value: false
Negate comparison result: false
		Right result set:
			Index Scan ResultSet for ONE using index ONE_C1 at serializable isolation level using share row locking chosen by the optimizer
			Number of opens = 9
			Rows seen = 9
			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={0}
				Number of columns fetched=1
				Number of deleted rows visited=0
				Number of pages visited=9
				Number of rows qualified=9
				Number of rows visited=9
				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:
None
ij> -- cross product join
select distinct a.c1 from one a, two b;
C1         
-----------
1          
2          
3          
4          
5          
6          
7          
8          
ij> -- Following runtime statistics output should have Eliminate duplicates = true
values SYSCS_UTIL.SYSCS_GET_RUNTIMESTATISTICS();
1                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Statement Name: 
	null
Statement Text: 
	-- cross product join
select distinct a.c1 from one a, two 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: 
Sort ResultSet:
Number of opens = 1
Rows input = 72
Rows returned = 8
Eliminate duplicates = true
In sorted order = true
	constructor time (milliseconds) = 0
	open time (milliseconds) = 0
	next time (milliseconds) = 0
	close time (milliseconds) = 0
Source result set:
	Nested Loop Join ResultSet:
	Number of opens = 1
	Rows seen from the left = 8
	Rows seen from the right = 72
	Rows filtered = 0
	Rows returned = 72
		constructor time (milliseconds) = 0
		open time (milliseconds) = 0
		next time (milliseconds) = 0
		close time (milliseconds) = 0
	Left result set:
		Index Scan ResultSet for ONE using index ONE_C1 at serializable isolation level using share table locking chosen by the optimizer
		Number of opens = 1
		Rows seen = 8
		Rows filtered = 0
		Fetch Size = 16
			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={0}
			Number of columns fetched=1
			Number of deleted rows visited=0
			Number of pages visited=1
			Number of rows qualified=8
			Number of rows visited=8
			Scan type=btree
			Tree height=-1
			start position: 
	None
			stop position: 
	None
			qualifiers:
None
	Right result set:
		Index Scan ResultSet for TWO using index TWO_C1C3 at serializable isolation level using share table locking chosen by the optimizer
		Number of opens = 8
		Rows seen = 72
		Rows filtered = 0
		Fetch Size = 16
			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={}
			Number of columns fetched=0
			Number of deleted rows visited=0
			Number of pages visited=8
			Number of rows qualified=72
			Number of rows visited=72
			Scan type=btree
			Tree height=1
			start position: 
	None
			stop position: 
	None
			qualifiers:
None
ij> -- no single table will yield at most 1 row
select distinct a.c1, a.c3, a.c2 from two a, two b where a.c1 = b.c1;
C1         |C3         |C2         
-----------------------------------