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本次搜索耗时 1.110 秒，为您找到相关结果约 40 个.

  • pdf文档 PostgreSQL 16.1 Documentation

    following query that searches a table graph using a link field: WITH RECURSIVE search_graph(id, link, data, depth) AS ( SELECT g.id, g.link, g.data, 0 FROM graph g UNION ALL SELECT g.id, g.link link, g.data, sg.depth + 1 FROM graph g, search_graph sg WHERE g.id = sg.link ) SELECT * FROM search_graph; This query will loop if the link relationships contain cycles. Because we require a loop-prone query: WITH RECURSIVE search_graph(id, link, data, depth, is_cycle, path) AS ( SELECT g.id, g.link, g.data, 0, false, ARRAY[g.id] FROM graph g UNION ALL SELECT g.id, g.link
    0 码力 | 2974 页 | 14.22 MB | 1 年前
    3

  • pdf文档 PostgreSQL 17beta1 A4 Documentation

    following query that searches a table graph using a link field: WITH RECURSIVE search_graph(id, link, data, depth) AS ( SELECT g.id, g.link, g.data, 0 FROM graph g UNION ALL SELECT g.id, g.link link, g.data, sg.depth + 1 FROM graph g, search_graph sg WHERE g.id = sg.link ) SELECT * FROM search_graph; This query will loop if the link relationships contain cycles. Because we require a loop-prone query: WITH RECURSIVE search_graph(id, link, data, depth, is_cycle, path) AS ( SELECT g.id, g.link, g.data, 0, false, ARRAY[g.id] FROM graph g UNION ALL SELECT g.id, g.link
    0 码力 | 3017 页 | 14.45 MB | 1 年前
    3

  • pdf文档 PostgreSQL 16.1 Documentation

    following query that searches a table graph using a link field: WITH RECURSIVE search_graph(id, link, data, depth) AS ( SELECT g.id, g.link, g.data, 0 FROM graph g UNION ALL SELECT g.id, g.link link, g.data, sg.depth + 1 FROM graph g, search_graph sg WHERE g.id = sg.link ) SELECT * FROM search_graph; This query will loop if the link relationships contain cycles. Because we require a loop-prone query: WITH RECURSIVE search_graph(id, link, data, depth, is_cycle, path) AS ( SELECT g.id, g.link, g.data, 0, false, ARRAY[g.id] FROM graph g UNION ALL SELECT g.id, g.link
    0 码力 | 3133 页 | 14.10 MB | 1 年前
    3

  • pdf文档 PostgreSQL 17beta1 US Documentation

    following query that searches a table graph using a link field: WITH RECURSIVE search_graph(id, link, data, depth) AS ( SELECT g.id, g.link, g.data, 0 FROM graph g UNION ALL SELECT g.id, g.link link, g.data, sg.depth + 1 FROM graph g, search_graph sg WHERE g.id = sg.link ) SELECT * FROM search_graph; This query will loop if the link relationships contain cycles. Because we require a loop-prone query: WITH RECURSIVE search_graph(id, link, data, depth, is_cycle, path) AS ( SELECT g.id, g.link, g.data, 0, false, ARRAY[g.id] FROM graph g UNION ALL SELECT g.id, g.link
    0 码力 | 3188 页 | 14.32 MB | 1 年前
    3

  • pdf文档 PostgreSQL 9.5.25 Documentation

    table graph using a link field: WITH RECURSIVE search_graph(id, link, data, depth) AS ( SELECT g.id, g.link, g.data, 1 FROM graph g UNION ALL SELECT g.id, g.link, g.data, sg.depth + 1 FROM graph g, search_graph search_graph sg WHERE g.id = 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 to the loop-prone query: WITH RECURSIVE search_graph(id, link, data, depth, path, cycle) AS ( SELECT g.id, g.link, g.data, 1, ARRAY[g.id], false FROM graph g UNION ALL SELECT g.id, g.link, g.data, sg.depth
    0 码力 | 2558 页 | 6.27 MB | 1 年前
    3

  • pdf文档 PostgreSQL 9.5 Documentation

    table graph using a link field: WITH RECURSIVE search_graph(id, link, data, depth) AS ( SELECT g.id, g.link, g.data, 1 FROM graph g UNION ALL SELECT g.id, g.link, g.data, sg.depth + 1 FROM graph g, search_graph search_graph sg WHERE g.id = 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 to the loop-prone query: WITH RECURSIVE search_graph(id, link, data, depth, path, cycle) AS ( SELECT g.id, g.link, g.data, 1, ARRAY[g.id], false FROM graph g UNION ALL SELECT g.id, g.link, g.data, sg.depth
    0 码力 | 2714 页 | 6.33 MB | 1 年前
    3

  • pdf文档 PostgreSQL 14.10 Documentation

    following query that searches a table graph using a link field: WITH RECURSIVE search_graph(id, link, data, depth) AS ( SELECT g.id, g.link, g.data, 0 FROM graph g UNION ALL SELECT g.id, g.link link, g.data, sg.depth + 1 FROM graph g, search_graph sg WHERE g.id = sg.link ) SELECT * FROM search_graph; This query will loop if the link relationships contain cycles. Because we require a loop-prone query: WITH RECURSIVE search_graph(id, link, data, depth, is_cycle, path) AS ( SELECT g.id, g.link, g.data, 0, false, ARRAY[g.id] FROM graph g UNION ALL SELECT g.id, g.link
    0 码力 | 2871 页 | 13.38 MB | 1 年前
    3

  • pdf文档 PostgreSQL 10.23 Documentation

    following query that searches a table graph using a link field: WITH RECURSIVE search_graph(id, link, data, depth) AS ( SELECT g.id, g.link, g.data, 1 FROM graph g UNION ALL SELECT SELECT g.id, g.link, g.data, sg.depth + 1 FROM graph g, search_graph sg WHERE g.id = sg.link ) SELECT * FROM search_graph; This query will loop if the link relationships contain cycles. Because query: WITH RECURSIVE search_graph(id, link, data, depth, path, cycle) AS ( SELECT g.id, g.link, g.data, 1, ARRAY[g.id], false FROM graph g UNION ALL SELECT
    0 码力 | 2590 页 | 12.03 MB | 1 年前
    3

  • pdf文档 PostgreSQL 9.6.24 Documentation

    table graph using a link field: WITH RECURSIVE search_graph(id, link, data, depth) AS ( SELECT g.id, g.link, g.data, 1 FROM graph g UNION ALL SELECT g.id, g.link, g.data, sg.depth + 1 FROM graph g, search_graph search_graph sg WHERE g.id = 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 to the loop-prone query: WITH RECURSIVE search_graph(id, link, data, depth, path, cycle) AS ( SELECT g.id, g.link, g.data, 1, ARRAY[g.id], false FROM graph g UNION ALL SELECT g.id, g.link, g.data, sg.depth
    0 码力 | 2814 页 | 6.58 MB | 1 年前
    3

  • pdf文档 PostgreSQL 9.6.24 Documentation

    table graph using a link field: WITH RECURSIVE search_graph(id, link, data, depth) AS ( SELECT g.id, g.link, g.data, 1 FROM graph g UNION ALL SELECT g.id, g.link, g.data, sg.depth + 1 FROM graph g, search_graph search_graph sg WHERE g.id = 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 to the loop-prone query: WITH RECURSIVE search_graph(id, link, data, depth, path, cycle) AS ( SELECT g.id, g.link, g.data, 1, ARRAY[g.id], false FROM graph g UNION ALL SELECT g.id, g.link, g.data, sg.depth
    0 码力 | 2661 页 | 6.53 MB | 1 年前
    3
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