mirror of
				https://github.com/postgres/postgres.git
				synced 2025-10-31 10:30:33 +03:00 
			
		
		
		
	Author: Tomas Vondra <tomas.vondra@2ndquadrant.com> Reviewed-by: Ashutosh Sharma <ashu.coek88@gmail.com>
		
			
				
	
	
		
			59 lines
		
	
	
		
			1.5 KiB
		
	
	
	
		
			Plaintext
		
	
	
	
	
	
			
		
		
	
	
			59 lines
		
	
	
		
			1.5 KiB
		
	
	
	
		
			Plaintext
		
	
	
	
	
	
| CREATE TABLE test1 (a int8, b text);
 | |
| INSERT INTO test1 VALUES (72057594037927937, 'text');
 | |
| CREATE INDEX test1_a_idx ON test1 USING btree (a);
 | |
| \x
 | |
| SELECT * FROM bt_metap('test1_a_idx');
 | |
| -[ RECORD 1 ]-----
 | |
| magic     | 340322
 | |
| version   | 2
 | |
| root      | 1
 | |
| level     | 0
 | |
| fastroot  | 1
 | |
| fastlevel | 0
 | |
| 
 | |
| SELECT * FROM bt_page_stats('test1_a_idx', 0);
 | |
| ERROR:  block 0 is a meta page
 | |
| SELECT * FROM bt_page_stats('test1_a_idx', 1);
 | |
| -[ RECORD 1 ]-+-----
 | |
| blkno         | 1
 | |
| type          | l
 | |
| live_items    | 1
 | |
| dead_items    | 0
 | |
| avg_item_size | 16
 | |
| page_size     | 8192
 | |
| free_size     | 8128
 | |
| btpo_prev     | 0
 | |
| btpo_next     | 0
 | |
| btpo          | 0
 | |
| btpo_flags    | 3
 | |
| 
 | |
| SELECT * FROM bt_page_stats('test1_a_idx', 2);
 | |
| ERROR:  block number out of range
 | |
| SELECT * FROM bt_page_items('test1_a_idx', 0);
 | |
| ERROR:  block 0 is a meta page
 | |
| SELECT * FROM bt_page_items('test1_a_idx', 1);
 | |
| -[ RECORD 1 ]-----------------------
 | |
| itemoffset | 1
 | |
| ctid       | (0,1)
 | |
| itemlen    | 16
 | |
| nulls      | f
 | |
| vars       | f
 | |
| data       | 01 00 00 00 00 00 00 01
 | |
| 
 | |
| SELECT * FROM bt_page_items('test1_a_idx', 2);
 | |
| ERROR:  block number out of range
 | |
| SELECT * FROM bt_page_items(get_raw_page('test1_a_idx', 0));
 | |
| ERROR:  block is a meta page
 | |
| SELECT * FROM bt_page_items(get_raw_page('test1_a_idx', 1));
 | |
| -[ RECORD 1 ]-----------------------
 | |
| itemoffset | 1
 | |
| ctid       | (0,1)
 | |
| itemlen    | 16
 | |
| nulls      | f
 | |
| vars       | f
 | |
| data       | 01 00 00 00 00 00 00 01
 | |
| 
 | |
| SELECT * FROM bt_page_items(get_raw_page('test1_a_idx', 2));
 | |
| ERROR:  block number 2 is out of range for relation "test1_a_idx"
 | |
| DROP TABLE test1;
 |