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127 lines
2.8 KiB
Text
127 lines
2.8 KiB
Text
DROP TABLE IF EXISTS graph_base;
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DROP TABLE IF EXISTS graph;
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CREATE TABLE graph_base (
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from_id INT UNSIGNED NOT NULL,
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to_id INT UNSIGNED NOT NULL,
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PRIMARY KEY (from_id,to_id),
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INDEX (to_id)
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) ENGINE=MyISAM;
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CREATE TABLE graph (
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latch VARCHAR(32) NULL,
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origid BIGINT UNSIGNED NULL,
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destid BIGINT UNSIGNED NULL,
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weight DOUBLE NULL,
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seq BIGINT UNSIGNED NULL,
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linkid BIGINT UNSIGNED NULL,
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KEY (latch, origid, destid) USING HASH,
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KEY (latch, destid, origid) USING HASH
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) ENGINE=OQGRAPH DATA_TABLE='graph_base' ORIGID='from_id', DESTID='to_id';
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INSERT INTO graph_base(from_id, to_id) VALUES (1,2), (2,1);
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SELECT count(*) FROM graph;
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count(*)
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2
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SELECT count(*) FROM graph_base;
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count(*)
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2
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INSERT INTO graph_base(from_id, to_id) VALUES (12,10);
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SELECT count(*) FROM graph;
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count(*)
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3
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SELECT count(*) FROM graph_base;
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count(*)
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3
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INSERT INTO graph_base(from_id, to_id) VALUES (14,13);
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SELECT count(*) FROM graph;
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count(*)
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4
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SELECT count(*) FROM graph_base;
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count(*)
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4
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DELETE FROM graph_base where from_id=10 and to_id=11;
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INSERT INTO graph_base(from_id, to_id) VALUES (10,15);
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INSERT INTO graph_base(from_id, to_id) VALUES (15,13);
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INSERT INTO graph_base(from_id, to_id) VALUES (10,11);
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SELECT count(*) FROM graph;
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count(*)
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7
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SELECT count(*) FROM graph_base;
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count(*)
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7
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INSERT INTO graph_base(from_id, to_id) VALUES (21,22);
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INSERT INTO graph_base (from_id,to_id) VALUES (4,6);
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SELECT count(*) FROM graph;
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count(*)
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9
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SELECT count(*) FROM graph_base;
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count(*)
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9
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SELECT * FROM graph where latch='0';
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latch origid destid weight seq linkid
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0 NULL NULL NULL NULL 1
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0 NULL NULL NULL NULL 2
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0 NULL NULL NULL NULL 12
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0 NULL NULL NULL NULL 10
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0 NULL NULL NULL NULL 14
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0 NULL NULL NULL NULL 13
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0 NULL NULL NULL NULL 15
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0 NULL NULL NULL NULL 11
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0 NULL NULL NULL NULL 21
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0 NULL NULL NULL NULL 22
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0 NULL NULL NULL NULL 4
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0 NULL NULL NULL NULL 6
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SELECT * FROM graph_base;
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from_id to_id
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1 2
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2 1
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4 6
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10 11
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10 15
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12 10
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14 13
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15 13
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21 22
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# And delete all references to node 2
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DELETE FROM graph_base WHERE from_id=2;
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DELETE FROM graph_base WHERE to_id=2;
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SELECT count(*) FROM graph;
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count(*)
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7
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SELECT count(*) FROM graph_base;
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count(*)
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7
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SELECT * FROM graph where latch='0';
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latch origid destid weight seq linkid
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0 NULL NULL NULL NULL 12
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0 NULL NULL NULL NULL 10
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0 NULL NULL NULL NULL 14
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0 NULL NULL NULL NULL 13
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0 NULL NULL NULL NULL 15
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0 NULL NULL NULL NULL 11
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0 NULL NULL NULL NULL 21
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0 NULL NULL NULL NULL 22
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0 NULL NULL NULL NULL 4
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0 NULL NULL NULL NULL 6
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SELECT * FROM graph_base;
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from_id to_id
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4 6
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10 11
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10 15
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12 10
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14 13
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15 13
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21 22
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DELETE FROM graph_base;
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SELECT count(*) FROM graph;
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count(*)
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0
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SELECT count(*) FROM graph_base;
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count(*)
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0
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SELECT * FROM graph where latch='0';
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latch origid destid weight seq linkid
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SELECT * FROM graph_base;
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from_id to_id
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FLUSH TABLES;
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TRUNCATE TABLE graph_base;
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DROP TABLE graph_base;
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DROP TABLE graph;
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