PostgreSQL 14.10 Documentationid = sg.link ) SELECT * FROM search_graph; This query will loop if the link relationships contain cycles. Because we require a “depth” output, just changing UNION ALL to UNION would not eliminate the looping sg WHERE g.id = sg.link AND NOT is_cycle ) SELECT * FROM search_graph; Aside from preventing cycles, the array value is often useful in its own right as representing the “path” taken to reach any particular three types, apart from increased storage space when using the blank-padded type, and a few extra CPU cycles to check the length when storing into a length-constrained column. While character(n) has performance0 码力 | 3032 页 | 13.27 MB | 1 年前3
PostgreSQL 14.10 Documentationid = sg.link ) SELECT * FROM search_graph; This query will loop if the link relationships contain cycles. Because we require a “depth” output, just changing UNION ALL to UNION would not eliminate the looping sg WHERE g.id = sg.link AND NOT is_cycle ) SELECT * FROM search_graph; Aside from preventing cycles, the array value is often useful in its own right as representing the “path” taken to reach any particular three types, apart from increased storage space when using the blank-padded type, and a few extra CPU cycles to check the length when storing into a length-constrained column. While character(n) has performance0 码力 | 2871 页 | 13.38 MB | 1 年前3
PostgreSQL 15.5 Documentationid = sg.link ) SELECT * FROM search_graph; This query will loop if the link relationships contain cycles. Because we require a “depth” output, just changing UNION ALL to UNION would not eliminate the looping sg WHERE g.id = sg.link AND NOT is_cycle ) SELECT * FROM search_graph; Aside from preventing cycles, the array value is often useful in its own right as representing the “path” taken to reach any particular three types, apart from increased storage space when using the blank-padded type, and a few extra CPU cycles to check the length when storing into a length-constrained column. While character(n) has performance0 码力 | 2910 页 | 13.60 MB | 1 年前3
PostgreSQL 15.5 Documentationid = sg.link ) SELECT * FROM search_graph; This query will loop if the link relationships contain cycles. Because we require a “depth” output, just changing UNION ALL to UNION would not eliminate the looping sg WHERE g.id = sg.link AND NOT is_cycle ) SELECT * FROM search_graph; Aside from preventing cycles, the array value is often useful in its own right as representing the “path” taken to reach any particular three types, apart from increased storage space when using the blank-padded type, and a few extra CPU cycles to check the length when storing into a length-constrained column. While character(n) has performance0 码力 | 3073 页 | 13.49 MB | 1 年前3
PostgreSQL 13.13 Documentationid = sg.link ) SELECT * FROM search_graph; This query will loop if the link relationships contain cycles. Because we require a “depth” output, just changing UNION ALL to UNION would not eliminate the looping search_graph sg WHERE g.id = sg.link AND NOT cycle ) SELECT * FROM search_graph; Aside from preventing cycles, the array value is often useful in its own right as representing the “path” taken to reach any particular three types, apart from increased storage space when using the blank-padded type, and a few extra CPU cycles to check the length when storing into a length-constrained column. While character(n) has performance0 码力 | 2782 页 | 13.00 MB | 1 年前3
PostgreSQL 12.17 Documentationid = sg.link ) SELECT * FROM search_graph; This query will loop if the link relationships contain cycles. Because we require a “depth” output, just changing UNION ALL to UNION would not eliminate the looping search_graph sg WHERE g.id = sg.link AND NOT cycle ) SELECT * FROM search_graph; Aside from preventing cycles, the array value is often useful in its own right as representing the “path” taken to reach any particular three types, apart from increased storage space when using the blank-padded type, and a few extra CPU cycles to check the length when storing into a length-constrained column. While character(n) has performance0 码力 | 2786 页 | 12.72 MB | 1 年前3
PostgreSQL 12.17 Documentationid = sg.link ) SELECT * FROM search_graph; This query will loop if the link relationships contain cycles. Because we require a “depth” output, just changing UNION ALL to UNION would not eliminate the looping search_graph sg WHERE g.id = sg.link AND NOT cycle ) SELECT * FROM search_graph; Aside from preventing cycles, the array value is often useful in its own right as representing the “path” taken to reach any particular three types, apart from increased storage space when using the blank-padded type, and a few extra CPU cycles to check the length when storing into a length-constrained column. While character(n) has performance0 码力 | 2943 页 | 12.61 MB | 1 年前3
PostgreSQL 13.14 Documentationid = sg.link ) SELECT * FROM search_graph; This query will loop if the link relationships contain cycles. Because we require a “depth” output, just changing UNION ALL to UNION would not eliminate the looping search_graph sg WHERE g.id = sg.link AND NOT cycle ) SELECT * FROM search_graph; Aside from preventing cycles, the array value is often useful in its own right as representing the “path” taken to reach any particular three types, apart from increased storage space when using the blank-padded type, and a few extra CPU cycles to check the length when storing into a length-constrained column. While character(n) has performance0 码力 | 2940 页 | 12.89 MB | 1 年前3
PostgreSQL 17beta1 A4 Documentationid = sg.link ) SELECT * FROM search_graph; This query will loop if the link relationships contain cycles. Because we require a “depth” output, just changing UNION ALL to UNION would not eliminate the looping sg WHERE g.id = sg.link AND NOT is_cycle ) SELECT * FROM search_graph; Aside from preventing cycles, the array value is often useful in its own right as representing the “path” taken to reach any particular three types, apart from increased storage space when using the blank-padded type, and a few extra CPU cycles to check the length when storing into a length-constrained column. While character(n) has performance0 码力 | 3017 页 | 14.45 MB | 1 年前3
PostgreSQL 11.22 Documentationid = sg.link ) SELECT * FROM search_graph; This query will loop if the link relationships contain cycles. Because we require a “depth” output, just changing UNION ALL to UNION would not eliminate the looping search_graph sg WHERE g.id = sg.link AND NOT cycle ) SELECT * FROM search_graph; Aside from preventing cycles, the array value is often useful in its own right as representing the “path” taken to reach any particular three types, apart from increased storage space when using the blank-padded type, and a few extra CPU cycles to check the length when storing into a length-constrained column. While character(n) has performance0 码力 | 2732 页 | 12.44 MB | 1 年前3
共 40 条
- 1
- 2
- 3
- 4













