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CREATE EXTENSION roaringbitmap;
CREATE TABLE t1 (id integer, bitmap roaringbitmap);
--数组位置对应的 BIT 值为1INSERT INTO t1 SELECT 1,RB_BUILD(ARRAY[1,2,3,4,5,6,7,8,9,200]);--将输入的多条记录的值对应位置的 BIT 值设置为1，最后聚合为一个 roaringbitmapINSERT INTO t1 SELECT 2,RB_BUILD_AGG(e) FROM GENERATE_SERIES(1,100) e;
--数组位置对应的 BIT 值为1SELECT RB_OR(a.bitmap,b.bitmap) FROM (SELECT bitmap FROM t1 WHERE id = 1) AS a,(SELECT bitmap FROM t1 WHERE id = 2) AS b;
SELECT RB_OR_AGG(bitmap) FROM t1;SELECT RB_AND_AGG(bitmap) FROM t1;SELECT RB_XOR_AGG(bitmap) FROM t1;SELECT RB_BUILD_AGG(e) FROM GENERATE_SERIES(1,100) e;
SELECT RB_CARDINALITY(bitmap) FROM t1;
SELECT RB_ITERATE(bitmap) FROM t1 WHERE id = 1;
函数名 | 输入 | 输出 | 描述 | 示例 | 结果 |
rb_build | integer[] | roaringbitmap | Create roaringbitmap from integer array | rb_build('{1,2,3,4,5}') | {1,2,3,4,5} |
rb_index | roaringbitmap,integer | bigint | Return the 0-based index of element in this roaringbitmap, or -1 if do not exsits | rb_index('{1,2,3}',3) | 2 |
rb_cardinality | roaringbitmap | bigint | Return cardinality of the roaringbitmap | rb_cardinality('{1,2,3,4,5}') | 5 |
rb_and_cardinality | roaringbitmap,roaringbitmap | bigint | Return cardinality of the AND of two roaringbitmaps | rb_or_cardinality('{1,2,3}','{3,4,5}') | 1 |
rb_xor_cardinality | roaringbitmap,roaringbitmap | bigint | Return cardinality of the XOR of two roaringbitmaps | rb_xor_cardinality('{1,2,3}','{3,4,5}') | 4 |
rb_andnot_cardinality | roaringbitmap,roaringbitmap | bigint | Return cardinality of the ANDNOT of two roaringbitmaps | rb_andnot_cardinality('{1,2,3}','{3,4,5}') | 2 |
rb_is_empty | roaringbitmap | boolean | Check if roaringbitmap is empty. | rb_is_empty('{1,2,3,4,5}') | t |
rb_fill | roaringbitmap,range_start bigint,range_end bigint | roaringbitmap | Fill the specified range (not include the range_end) | rb_fill('{1,2,3}',5,7) | {1,2,3,5,6} |
rb_clear | roaringbitmap,range_start bigint,range_end bigint | roaringbitmap | Clear the specified range (not include the range_end) | rb_clear('{1,2,3}',2,3) | {1,3} |
rb_flip | roaringbitmap,range_start bigint,range_end bigint | roaringbitmap | Negative the specified range (not include the range_end) | rb_flip('{1,2,3}',2,10) | {1,4,5,6,7,8,9} |
rb_range | roaringbitmap,range_start bigint,range_end bigint | roaringbitmap | Return new set with specified range (not include the range_end) | rb_range('{1,2,3}',2,3) | {2} |
rb_range_cardinality | roaringbitmap,range_start bigint,range_end bigint | bigint | Return the cardinality of specified range (not include the range_end) | rb_range_cardinality('{1,2,3}',2,3) | 1 |
rb_min | roaringbitmap | integer | Return the smallest offset in roaringbitmap. Return NULL if the bitmap is empty | rb_min('{1,2,3}') | 1 |
rb_max | roaringbitmap | integer | Return the greatest offset in roaringbitmap. Return NULL if the bitmap is empty | rb_max('{1,2,3}') | 3 |
rb_rank | roaringbitmap,integer | bigint | Return the number of elements that are smaller or equal to the specified offset | rb_rank('{1,2,3}',3) | 3 |
rb_jaccard_dist | roaringbitmap,roaringbitmap | double precision | Return the jaccard distance(or the Jaccard similarity coefficient) of two bitmaps | rb_jaccard_dist('{1,2,3}','{3,4}') | 0.25 |
rb_select | roaringbitmap,bitset_limit bigint,bitset_offset bigint=0,reverse boolean=false,range_start bigint=0,range_end bigint=4294967296 | roaringbitmap | Return subset [bitset_offset,bitset_offset+bitset_limit) of bitmap between range [range_start,range_end) | rb_select('{1,2,3,4,5,6,7,8,9}',5,2) | {3,4,5,6,7} |
rb_to_array | roaringbitmap | integer[] | Convert roaringbitmap to integer array | rb_to_array(roaringbitmap('{1,2,3}')) | {1,2,3} |
rb_iterate | roaringbitmap | SET of integer | Return set of integer from a roaringbitmap data. | SELECT rb_iterate(rb_build('{1,2,3}')) | 1 2 3 |
聚合函数名 | 输入 | 输出 | 描述 | 示例 | 结果 |
rb_build_agg | integer | roaringbitmap | Build a roaringbitmap from a integer set | select rb_build_agg(id) from (values (1),(2),(3)) t(id) | {1,2,3} |
rb_or_agg | roaringbitmap | roaringbitmap | AND Aggregate calculations from a roaringbitmap set | select rb_or_agg(bitmap) from (values (roaringbitmap('{1,2,3}')), (roaringbitmap('{2,3,4}'))) t(bitmap) | {1,2,3,4} |
rb_and_agg | roaringbitmap | roaringbitmap | AND Aggregate calculations from a roaringbitmap set | select rb_and_agg(bitmap) from (values (roaringbitmap('{1,2,3}')), (roaringbitmap('{2,3,4}'))) t(bitmap) | {2,3} |
rb_xor_agg | roaringbitmap | roaringbitmap | XOR Aggregate calculations from a roaringbitmap set | select rb_xor_agg(bitmap) from (values (roaringbitmap('{1,2,3}')), (roaringbitmap('{2,3,4}'))) t(bitmap) | {1,4} |
rb_or_cardinality_agg | roaringbitmap | bigint | OR Aggregate calculations from a roaringbitmap set, return cardinality. | select rb_or_cardinality_agg(bitmap) from (values (roaringbitmap('{1,2,3}')),(roaringbitmap('{2,3,4}')) ) t(bitmap) | 4 |
rb_and_cardinality_agg | roaringbitmap | bigint | AND Aggregate calculations from a roaringbitmap set, return cardinality | select rb_and_cardinality_agg(bitmap) from (values (roaringbitmap('{1,2,3}')), (roaringbitmap('{2,3,4}'))) t(bitmap) | 2 |
rb_xor_cardinality_agg | roaringbitmap | bigint | XOR Aggregate calculations from a roaringbitmap set, return cardinality | select rb_xor_cardinality_agg(bitmap) from (values (roaringbitmap('{1,2,3}')), (roaringbitmap('{2,3,4}')) ) t(bitmap) | 2 |
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