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143 lines
2.9 KiB
Text
143 lines
2.9 KiB
Text
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--echo #
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--echo # check errors
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--echo #
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--error ER_DUP_FIELDNAME
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WITH RECURSIVE cte AS (
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SELECT 1 AS a UNION ALL
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SELECT NULL FROM cte WHERE a IS NOT NULL)
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CYCLE a, a RESTRICT
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SELECT * FROM cte;
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--error ER_BAD_FIELD_ERROR
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WITH RECURSIVE cte AS (
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SELECT 1 AS a UNION ALL
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SELECT NULL FROM cte WHERE a IS NOT NULL)
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CYCLE b RESTRICT
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SELECT * FROM cte;
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--error ER_PARSE_ERROR
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WITH cte AS (
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SELECT 1 AS a UNION ALL
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SELECT NULL FROM cte WHERE a IS NOT NULL)
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CYCLE b RESTRICT
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SELECT * FROM cte;
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--echo #
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--echo # A degenerate case
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--echo #
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WITH RECURSIVE cte AS (
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SELECT 1 AS a, 2 as b)
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CYCLE b RESTRICT
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SELECT * FROM cte;
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--echo #
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--echo # A simple case
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--echo #
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WITH RECURSIVE cte AS (
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SELECT 1 AS a, 2 as b UNION ALL
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SELECT 2, 2 FROM cte WHERE a IS NOT NULL)
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CYCLE b RESTRICT
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SELECT * FROM cte;
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--echo #
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--echo # MDEV-20632 case (with fixed syntax)
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--echo #
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create table t1 (from_ int, to_ int);
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insert into t1 values (1,2), (1,100), (2,3), (3,4), (4,1);
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WITH RECURSIVE cte (depth, from_, to_) as (
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SELECT 0,1,1
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UNION
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SELECT depth+1, t1.from_, t1.to_
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FROM t1, cte WHERE t1.from_ = cte.to_
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) CYCLE from_, to_ RESTRICT
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select * from cte;
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create view v1 as WITH RECURSIVE cte (depth, from_, to_) as (
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SELECT 0,1,1
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UNION
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SELECT depth+1, t1.from_, t1.to_
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FROM t1, cte WHERE t1.from_ = cte.to_
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) CYCLE from_, to_ RESTRICT
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select * from cte;
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show create view v1;
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select * from v1;
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delete from t1;
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insert into t1 values (1,2), (1,NULL), (NULL,NULL), (NULL, 1);
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select * from v1;
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drop view v1;
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drop table t1;
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--echo #
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--echo # A simple blob case
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--echo #
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create table t1 (a int, b text);
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insert into t1 values (1, "a");
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WITH RECURSIVE cte AS (
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SELECT a, b from t1 UNION ALL
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SELECT a, b FROM cte WHERE a IS NOT NULL)
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CYCLE b RESTRICT
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SELECT * FROM cte;
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drop table t1;
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--echo #
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--echo # check bit types
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--echo #
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create table t1 (from_ bit(3), to_ bit(3));
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insert into t1 values (1,2), (1,7), (2,3), (3,4), (4,1);
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WITH RECURSIVE cte (depth, from_, to_) as (
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SELECT 0,1,1
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UNION
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SELECT depth+1, t1.from_, t1.to_
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FROM t1, cte WHERE t1.from_ = cte.to_
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) CYCLE from_, to_ RESTRICT
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select * from cte;
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drop table t1;
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--echo #
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--echo # check bit types with BLOBs (TEXT)
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--echo #
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create table t1 (from_ bit(3), to_ bit(3), load_ text);
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insert into t1 values (1,2,"A"), (1,7,"A"), (2,3,"A"), (3,4,"A"), (4,1,"A");
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WITH RECURSIVE cte (depth, from_, to_, load_) as (
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SELECT 0,1,1,"A"
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UNION
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SELECT depth+1, t1.from_, t1.to_, t1.load_
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FROM t1, cte WHERE t1.from_ = cte.to_
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) CYCLE from_, to_, load_ RESTRICT
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select * from cte;
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insert into t1 values (4,1,"B");
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WITH RECURSIVE cte (depth, from_, to_, load_) as (
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SELECT 0,1,1,"A"
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UNION
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SELECT depth+1, t1.from_, t1.to_, t1.load_
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FROM t1, cte WHERE t1.from_ = cte.to_
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) CYCLE from_, to_, load_ RESTRICT
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select * from cte;
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drop table t1;
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