distinctelimination.out

derby database source code.good for you.

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 = 9
Eliminate duplicates = true
In sorted order = false
Sort information: 
	Number of rows input=72
	Number of rows output=9
	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={}
			Number of columns fetched=0
			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={0, 1}
			Number of columns fetched=2
			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> -- join between three tables with two tables joined uniquely 
select distinct a.c1 from one a, two b, three c where a.c1 = c.c1 and a.c1 = 1;
C1         
-----------
1          
ij> -- Following runtime statistics output should have Eliminate duplicates = true
values SYSCS_UTIL.SYSCS_GET_RUNTIMESTATISTICS();
1                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Statement Name: 
	null
Statement Text: 
	-- join between three tables with two tables joined uniquely 
select distinct a.c1 from one a, two b, three c where a.c1 = c.c1 and a.c1 = 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 = 1
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:
	Project-Restrict ResultSet (7):
	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 Join ResultSet:
		Number of opens = 1
		Rows seen from the left = 1
		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:
			Nested Loop Exists Join ResultSet:
			Number of opens = 1
			Rows seen from the left = 1
			Rows seen from the right = 1
			Rows filtered = 0
			Rows returned = 1
				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 row locking chosen by the optimizer
				Number of opens = 1
				Rows seen = 1
				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=1
					Number of rows qualified=1
					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:
None
			Right result set:
				Index Scan ResultSet for THREE using index THREE_C1 at serializable isolation level using share row locking chosen by the optimizer
				Number of opens = 1
				Rows seen = 1
				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=1
					Number of rows qualified=1
					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:
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 = 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={}
				Number of columns fetched=0
				Number of deleted rows visited=0
				Number of pages visited=1
				Number of rows qualified=9
				Number of rows visited=9
				Scan type=btree
				Tree height=1
				start position: 
	None
				stop position: 
	None
				qualifiers:
None
ij> --
-- queries that should eliminate the distinct
-- single table queries
-- unique columns in select list
select distinct c1 from one;
C1         
-----------
1          
2          
3          
4          
5          
6          
7          
8          
ij> -- Following runtime statistics output should not have Eliminate duplicates = true
values SYSCS_UTIL.SYSCS_GET_RUNTIMESTATISTICS();
1                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Statement Name: 
	null
Statement Text: 
	--
-- queries that should eliminate the distinct
-- single table queries
-- unique columns in select list
select distinct c1 from one
Parse Time: 0
Bind Time: 0
Optimize Time: 0
Generate Time: 0
Compile Time: 0
Execute Time: 0
Begin Compilation Timestamp : null
End Compilat