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MDEV-20632: Recursive CTE cycle detection using CYCLE clause (nonstandard)

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Added CYCLE ... RESTRICT (nonstandard) clause to recursive CTE.
This commit is contained in:
Oleksandr Byelkin
2020-01-27 21:50:16 +01:00
parent a5584b13d1
commit 50c0939166
20 changed files with 619 additions and 147 deletions
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include/mysql_com.h
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@@ -206,6 +206,8 @@ enum enum_indicator_type
itself supports it*/
#define LONG_UNIQUE_HASH_FIELD (1<< 30) /* This field will store hash for unique
column */
#define FIELD_PART_OF_TMP_UNIQUE (1<< 31) /* part of an unique constrain
for a tmporary table*/
#define REFRESH_GRANT (1ULL << 0) /* Refresh grant tables */
#define REFRESH_LOG (1ULL << 1) /* Start on new log file */