Create 'main' test directory and move 't' and 'r' there

1 files changed, 0 insertions, 1646 deletions

diff --git a/mysql-test/r/explain_json.result b/mysql-test/r/explain_json.result
deleted file mode 100644
index ef6b70aff71..00000000000
--- a/mysql-test/r/explain_json.result
+++ /dev/null
@@ -1,1646 +0,0 @@
-drop table if exists t0,t1,t2;
-create table t0(a int);
-insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
-explain format=json select * from t0;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "t0",
-      "access_type": "ALL",
-      "rows": 10,
-      "filtered": 100
-    }
-  }
-}
-explain format=json select * from t0 where 1>2;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "message": "Impossible WHERE"
-    }
-  }
-}
-explain format=json select * from t0 where a<3;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "t0",
-      "access_type": "ALL",
-      "rows": 10,
-      "filtered": 100,
-      "attached_condition": "t0.a < 3"
-    }
-  }
-}
-# Try a basic join
-create table t1 (a int, b int, filler char(32), key(a));
-insert into t1 
-select 
-a.a + b.a* 10 + c.a * 100, 
-a.a + b.a* 10 + c.a * 100,
-'filler'
-from t0 a, t0 b, t0 c;
-explain format=json select * from t0,t1 where t1.a=t0.a;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "t0",
-      "access_type": "ALL",
-      "rows": 10,
-      "filtered": 100,
-      "attached_condition": "t0.a is not null"
-    },
-    "table": {
-      "table_name": "t1",
-      "access_type": "ref",
-      "possible_keys": ["a"],
-      "key": "a",
-      "key_length": "5",
-      "used_key_parts": ["a"],
-      "ref": ["test.t0.a"],
-      "rows": 1,
-      "filtered": 100
-    }
-  }
-}
-# Try range and index_merge
-create table t2 (a1 int, a2 int, b1 int, b2 int, key(a1,a2), key(b1,b2));
-insert into t2 select a,a,a,a from t1;
-explain format=json select * from t2 where a1<5;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "t2",
-      "access_type": "range",
-      "possible_keys": ["a1"],
-      "key": "a1",
-      "key_length": "5",
-      "used_key_parts": ["a1"],
-      "rows": 5,
-      "filtered": 100,
-      "index_condition": "t2.a1 < 5"
-    }
-  }
-}
-explain format=json select * from t2 where a1=1 or b1=2;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "t2",
-      "access_type": "index_merge",
-      "possible_keys": ["a1", "b1"],
-      "key_length": "5,5",
-      "index_merge": {
-        "sort_union": {
-          "range": {
-            "key": "a1",
-            "used_key_parts": ["a1"]
-          },
-          "range": {
-            "key": "b1",
-            "used_key_parts": ["b1"]
-          }
-        }
-      },
-      "rows": 2,
-      "filtered": 100,
-      "attached_condition": "t2.a1 = 1 or t2.b1 = 2"
-    }
-  }
-}
-explain format=json select * from t2 where a1=1 or (b1=2 and b2=3);
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "t2",
-      "access_type": "index_merge",
-      "possible_keys": ["a1", "b1"],
-      "key_length": "5,10",
-      "index_merge": {
-        "sort_union": {
-          "range": {
-            "key": "a1",
-            "used_key_parts": ["a1"]
-          },
-          "range": {
-            "key": "b1",
-            "used_key_parts": ["b1", "b2"]
-          }
-        }
-      },
-      "rows": 2,
-      "filtered": 100,
-      "attached_condition": "t2.a1 = 1 or t2.b1 = 2 and t2.b2 = 3"
-    }
-  }
-}
-explain format=json select * from t2 where (a1=1 and a2=1) or 
-(b1=2 and b2=1);
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "t2",
-      "access_type": "index_merge",
-      "possible_keys": ["a1", "b1"],
-      "key_length": "10,10",
-      "index_merge": {
-        "union": {
-          "range": {
-            "key": "a1",
-            "used_key_parts": ["a1", "a2"]
-          },
-          "range": {
-            "key": "b1",
-            "used_key_parts": ["b1", "b2"]
-          }
-        }
-      },
-      "rows": 2,
-      "filtered": 100,
-      "attached_condition": "t2.a1 = 1 and t2.a2 = 1 or t2.b1 = 2 and t2.b2 = 1"
-    }
-  }
-}
-# Try ref access on two key components
-explain format=json select * from t0,t2 where t2.b1=t0.a and t2.b2=4;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "t0",
-      "access_type": "ALL",
-      "rows": 10,
-      "filtered": 100,
-      "attached_condition": "t0.a is not null"
-    },
-    "table": {
-      "table_name": "t2",
-      "access_type": "ref",
-      "possible_keys": ["b1"],
-      "key": "b1",
-      "key_length": "10",
-      "used_key_parts": ["b1", "b2"],
-      "ref": ["test.t0.a", "const"],
-      "rows": 1,
-      "filtered": 100
-    }
-  }
-}
-drop table t1,t2;
-#
-# Try a UNION
-#
-explain format=json select * from t0 A union     select * from t0 B;
-EXPLAIN
-{
-  "query_block": {
-    "union_result": {
-      "table_name": "<union1,2>",
-      "access_type": "ALL",
-      "query_specifications": [
-        {
-          "query_block": {
-            "select_id": 1,
-            "table": {
-              "table_name": "A",
-              "access_type": "ALL",
-              "rows": 10,
-              "filtered": 100
-            }
-          }
-        },
-        {
-          "query_block": {
-            "select_id": 2,
-            "operation": "UNION",
-            "table": {
-              "table_name": "B",
-              "access_type": "ALL",
-              "rows": 10,
-              "filtered": 100
-            }
-          }
-        }
-      ]
-    }
-  }
-}
-explain format=json select * from t0 A union all select * from t0 B;
-EXPLAIN
-{
-  "query_block": {
-    "union_result": {
-      "table_name": "<union1,2>",
-      "access_type": "ALL",
-      "query_specifications": [
-        {
-          "query_block": {
-            "select_id": 1,
-            "table": {
-              "table_name": "A",
-              "access_type": "ALL",
-              "rows": 10,
-              "filtered": 100
-            }
-          }
-        },
-        {
-          "query_block": {
-            "select_id": 2,
-            "operation": "UNION",
-            "table": {
-              "table_name": "B",
-              "access_type": "ALL",
-              "rows": 10,
-              "filtered": 100
-            }
-          }
-        }
-      ]
-    }
-  }
-}
-#
-# Subqueries
-#
-create table t1 (a int, b int);
-insert into t1 select a,a from t0;
-explain format=json select a, a > (select max(b) from t1 where t1.b=t0.a) from t0;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "t0",
-      "access_type": "ALL",
-      "rows": 10,
-      "filtered": 100
-    },
-    "subqueries": [
-      {
-        "expression_cache": {
-          "state": "uninitialized",
-          "query_block": {
-            "select_id": 2,
-            "table": {
-              "table_name": "t1",
-              "access_type": "ALL",
-              "rows": 10,
-              "filtered": 100,
-              "attached_condition": "t1.b = t0.a"
-            }
-          }
-        }
-      }
-    ]
-  }
-}
-explain format=json 
-select * from t0 where 
-a > (select max(b) from t1 where t1.b=t0.a) or a < 3 ;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "t0",
-      "access_type": "ALL",
-      "rows": 10,
-      "filtered": 100,
-      "attached_condition": "t0.a > (subquery#2) or t0.a < 3"
-    },
-    "subqueries": [
-      {
-        "expression_cache": {
-          "state": "uninitialized",
-          "query_block": {
-            "select_id": 2,
-            "table": {
-              "table_name": "t1",
-              "access_type": "ALL",
-              "rows": 10,
-              "filtered": 100,
-              "attached_condition": "t1.b = t0.a"
-            }
-          }
-        }
-      }
-    ]
-  }
-}
-drop table t1;
-#
-# Join buffering
-#
-create table t1 (a int, b int);
-insert into t1 select tbl1.a+10*tbl2.a, tbl1.a+10*tbl2.a from t0 tbl1, t0 tbl2;
-explain format=json
-select * from t1 tbl1, t1 tbl2 where tbl1.a=tbl2.a and tbl1.b < 3 and tbl2.b < 5;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "tbl1",
-      "access_type": "ALL",
-      "rows": 100,
-      "filtered": 100,
-      "attached_condition": "tbl1.b < 3"
-    },
-    "block-nl-join": {
-      "table": {
-        "table_name": "tbl2",
-        "access_type": "ALL",
-        "rows": 100,
-        "filtered": 100,
-        "attached_condition": "tbl2.b < 5"
-      },
-      "buffer_type": "flat",
-      "buffer_size": "256Kb",
-      "join_type": "BNL",
-      "attached_condition": "tbl2.a = tbl1.a"
-    }
-  }
-}
-drop table t1;
-#
-# Single-table UPDATE/DELETE, INSERT
-#
-explain format=json delete from t0;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "message": "Deleting all rows"
-    }
-  }
-}
-explain format=json delete from t0 where 1 > 2;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "message": "Impossible WHERE"
-    }
-  }
-}
-explain format=json delete from t0 where a < 3;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "delete": 1,
-      "table_name": "t0",
-      "access_type": "ALL",
-      "rows": 10,
-      "attached_condition": "t0.a < 3"
-    }
-  }
-}
-explain format=json update t0 set a=3 where a in (2,3,4);
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "update": 1,
-      "table_name": "t0",
-      "access_type": "ALL",
-      "rows": 10,
-      "attached_condition": "t0.a in (2,3,4)"
-    }
-  }
-}
-explain format=json insert into t0 values (1);
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "t0"
-    }
-  }
-}
-create table t1 like t0;
-explain format=json insert into t1 values ((select max(a) from t0));
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "t1"
-    },
-    "subqueries": [
-      {
-        "query_block": {
-          "select_id": 2,
-          "table": {
-            "table_name": "t0",
-            "access_type": "ALL",
-            "rows": 10,
-            "filtered": 100
-          }
-        }
-      }
-    ]
-  }
-}
-drop table t1;
-#
-# A derived table
-#
-create table t1 (a int, b int);
-insert into t1 select a,a from t0;
-explain format=json
-select * from (select a, count(*) as cnt from t1 group by a) as tbl
-where cnt>0;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "<derived2>",
-      "access_type": "ALL",
-      "rows": 10,
-      "filtered": 100,
-      "attached_condition": "tbl.cnt > 0",
-      "materialized": {
-        "query_block": {
-          "select_id": 2,
-          "having_condition": "cnt > 0",
-          "filesort": {
-            "sort_key": "t1.a",
-            "temporary_table": {
-              "table": {
-                "table_name": "t1",
-                "access_type": "ALL",
-                "rows": 10,
-                "filtered": 100
-              }
-            }
-          }
-        }
-      }
-    }
-  }
-}
-explain format=json
-select * from (select a, count(*) as cnt from t1 group by a) as tbl1, t1 as
-tbl2 where cnt=tbl2.a;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "tbl2",
-      "access_type": "ALL",
-      "rows": 10,
-      "filtered": 100,
-      "attached_condition": "tbl2.a is not null"
-    },
-    "table": {
-      "table_name": "<derived2>",
-      "access_type": "ref",
-      "possible_keys": ["key0"],
-      "key": "key0",
-      "key_length": "8",
-      "used_key_parts": ["cnt"],
-      "ref": ["test.tbl2.a"],
-      "rows": 2,
-      "filtered": 100,
-      "attached_condition": "tbl1.cnt = tbl2.a",
-      "materialized": {
-        "query_block": {
-          "select_id": 2,
-          "filesort": {
-            "sort_key": "t1.a",
-            "temporary_table": {
-              "table": {
-                "table_name": "t1",
-                "access_type": "ALL",
-                "rows": 10,
-                "filtered": 100
-              }
-            }
-          }
-        }
-      }
-    }
-  }
-}
-#
-# Non-merged semi-join (aka JTBM)
-#
-explain format=json 
-select * from t1 where a in (select max(a) from t1 group by b);
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "t1",
-      "access_type": "ALL",
-      "rows": 10,
-      "filtered": 100,
-      "attached_condition": "t1.a is not null"
-    },
-    "table": {
-      "table_name": "<subquery2>",
-      "access_type": "eq_ref",
-      "possible_keys": ["distinct_key"],
-      "key": "distinct_key",
-      "key_length": "4",
-      "used_key_parts": ["max(a)"],
-      "ref": ["test.t1.a"],
-      "rows": 1,
-      "filtered": 100,
-      "materialized": {
-        "unique": 1,
-        "query_block": {
-          "select_id": 2,
-          "temporary_table": {
-            "table": {
-              "table_name": "t1",
-              "access_type": "ALL",
-              "rows": 10,
-              "filtered": 100
-            }
-          }
-        }
-      }
-    }
-  }
-}
-#
-# Semi-join Materialization
-#
-create table t2 like t1;
-insert into t2 select * from t1;
-explain format=json
-select * from t1,t2 where t1.a in ( select a from t0);
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "const_condition": "1",
-    "table": {
-      "table_name": "t1",
-      "access_type": "ALL",
-      "rows": 10,
-      "filtered": 100
-    },
-    "table": {
-      "table_name": "<subquery2>",
-      "access_type": "eq_ref",
-      "possible_keys": ["distinct_key"],
-      "key": "distinct_key",
-      "key_length": "4",
-      "used_key_parts": ["a"],
-      "ref": ["func"],
-      "rows": 1,
-      "filtered": 100,
-      "materialized": {
-        "unique": 1,
-        "query_block": {
-          "select_id": 2,
-          "table": {
-            "table_name": "t0",
-            "access_type": "ALL",
-            "rows": 10,
-            "filtered": 100
-          }
-        }
-      }
-    },
-    "block-nl-join": {
-      "table": {
-        "table_name": "t2",
-        "access_type": "ALL",
-        "rows": 10,
-        "filtered": 100
-      },
-      "buffer_type": "flat",
-      "buffer_size": "256Kb",
-      "join_type": "BNL"
-    }
-  }
-}
-# 
-# First-Match
-# 
-explain
-select * from t2 where t2.a in ( select a from t1 where t1.b=t2.b);
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	10	
-1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	10	Using where; FirstMatch(t2); Using join buffer (flat, BNL join)
-explain format=json
-select * from t2 where t2.a in ( select a from t1 where t1.b=t2.b);
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "t2",
-      "access_type": "ALL",
-      "rows": 10,
-      "filtered": 100
-    },
-    "block-nl-join": {
-      "table": {
-        "table_name": "t1",
-        "access_type": "ALL",
-        "rows": 10,
-        "filtered": 100,
-        "first_match": "t2"
-      },
-      "buffer_type": "flat",
-      "buffer_size": "256Kb",
-      "join_type": "BNL",
-      "attached_condition": "t1.b = t2.b and t1.a = t2.a"
-    }
-  }
-}
-# 
-# Duplicate Weedout
-# 
-set @tmp= @@optimizer_switch;
-set optimizer_switch='firstmatch=off';
-explain
-select * from t2 where t2.a in ( select a from t1 where t1.b=t2.b);
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	10	
-1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	10	Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
-explain format=json
-select * from t2 where t2.a in ( select a from t1 where t1.b=t2.b);
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "t2",
-      "access_type": "ALL",
-      "rows": 10,
-      "filtered": 100
-    },
-    "duplicates_removal": {
-      "block-nl-join": {
-        "table": {
-          "table_name": "t1",
-          "access_type": "ALL",
-          "rows": 10,
-          "filtered": 100
-        },
-        "buffer_type": "flat",
-        "buffer_size": "256Kb",
-        "join_type": "BNL",
-        "attached_condition": "t1.b = t2.b and t1.a = t2.a"
-      }
-    }
-  }
-}
-set optimizer_switch=@tmp;
-drop table t1,t2;
-#
-# MRR for range access (no BKA, just MRR)
-#
-create table t1 (a int, b int, key(a));
-insert into t1 select tbl1.a+10*tbl2.a, 12345 from t0 tbl1, t0 tbl2;
-set @tmp= @@optimizer_switch;
-set optimizer_switch='mrr=on,mrr_sort_keys=on';
-explain format=json select * from t1 where a < 3;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "t1",
-      "access_type": "range",
-      "possible_keys": ["a"],
-      "key": "a",
-      "key_length": "5",
-      "used_key_parts": ["a"],
-      "rows": 1,
-      "filtered": 100,
-      "index_condition": "t1.a < 3",
-      "mrr_type": "Rowid-ordered scan"
-    }
-  }
-}
-# 'Range checked for each record'
-set optimizer_switch=@tmp;
-explain format=json
-select * from t1 tbl1, t1 tbl2 where tbl2.a < tbl1.b;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "tbl1",
-      "access_type": "ALL",
-      "rows": 100,
-      "filtered": 100
-    },
-    "range-checked-for-each-record": {
-      "keys": ["a"],
-      "table": {
-        "table_name": "tbl2",
-        "access_type": "ALL",
-        "possible_keys": ["a"],
-        "rows": 100,
-        "filtered": 100
-      }
-    }
-  }
-}
-drop table t1;
-drop table t0;
-#
-# MDEV-7265: "Full scan on NULL key", the join case
-#
-CREATE TABLE t1 (a INT, KEY(a));
-INSERT INTO t1 VALUES (1),(2);
-CREATE TABLE t2 (b INT);
-INSERT INTO t2 VALUES (3),(4);
-EXPLAIN FORMAT=JSON SELECT * FROM t1 AS outer_t1 WHERE a <> ALL ( SELECT a FROM t1, t2 WHERE b <> outer_t1.a );
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "outer_t1",
-      "access_type": "index",
-      "key": "a",
-      "key_length": "5",
-      "used_key_parts": ["a"],
-      "rows": 2,
-      "filtered": 100,
-      "attached_condition": "!<in_optimizer>(outer_t1.a,<exists>(subquery#2))",
-      "using_index": true
-    },
-    "subqueries": [
-      {
-        "query_block": {
-          "select_id": 2,
-          "having_condition": "trigcond(t1.a is null)",
-          "full-scan-on-null_key": {
-            "table": {
-              "table_name": "t1",
-              "access_type": "ref_or_null",
-              "possible_keys": ["a"],
-              "key": "a",
-              "key_length": "5",
-              "used_key_parts": ["a"],
-              "ref": ["func"],
-              "rows": 2,
-              "filtered": 100,
-              "attached_condition": "trigcond(<cache>(outer_t1.a) = t1.a or t1.a is null)",
-              "using_index": true
-            }
-          },
-          "block-nl-join": {
-            "table": {
-              "table_name": "t2",
-              "access_type": "ALL",
-              "rows": 2,
-              "filtered": 100
-            },
-            "buffer_type": "flat",
-            "buffer_size": "256Kb",
-            "join_type": "BNL",
-            "attached_condition": "t2.b <> outer_t1.a"
-          }
-        }
-      }
-    ]
-  }
-}
-DROP TABLE t1,t2;
-#
-# Join's constant expression
-#
-create table t0(a int);
-insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
-create table t1(a int, b int);
-insert into t1 select tbl1.a+10*tbl2.a, 1234 from t0 tbl1, t0 tbl2;
-explain format=json 
-select * from t0 
-where 
-20000 > all (select max(tbl1.a + tbl2.a)
-from t1 tbl1, t1 tbl2 where tbl1.b=tbl2.b);
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "const_condition": "<not>(<in_optimizer>(20000,<max>(subquery#2) >= 20000))",
-    "table": {
-      "table_name": "t0",
-      "access_type": "ALL",
-      "rows": 10,
-      "filtered": 100
-    },
-    "subqueries": [
-      {
-        "query_block": {
-          "select_id": 2,
-          "table": {
-            "table_name": "tbl1",
-            "access_type": "ALL",
-            "rows": 100,
-            "filtered": 100
-          },
-          "block-nl-join": {
-            "table": {
-              "table_name": "tbl2",
-              "access_type": "ALL",
-              "rows": 100,
-              "filtered": 100
-            },
-            "buffer_type": "flat",
-            "buffer_size": "256Kb",
-            "join_type": "BNL",
-            "attached_condition": "tbl2.b = tbl1.b"
-          }
-        }
-      }
-    ]
-  }
-}
-drop table t1;
-drop table t0;
-# 
-# MDEV-7264: Assertion `0' failed in subselect_engine::get_identifier() on EXPLAIN JSON
-# 
-CREATE TABLE t1 (a INT);
-INSERT INTO t1 VALUES (1),(2);
-CREATE TABLE t2 (b INT);
-INSERT INTO t2 VALUES (3),(4);
-EXPLAIN FORMAT=JSON SELECT * FROM t1 WHERE a <> ALL ( SELECT b FROM t2 );
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "t1",
-      "access_type": "ALL",
-      "rows": 2,
-      "filtered": 100,
-      "attached_condition": "!<in_optimizer>(t1.a,t1.a in (subquery#2))"
-    },
-    "subqueries": [
-      {
-        "query_block": {
-          "select_id": 2,
-          "table": {
-            "table_name": "t2",
-            "access_type": "ALL",
-            "rows": 2,
-            "filtered": 100
-          }
-        }
-      }
-    ]
-  }
-}
-DROP TABLE t1, t2;
-#
-# MDEV-7927: Server crashes in in Time_and_counter_tracker::incr_loops
-#
-CREATE TABLE t1 (i INT);
-INSERT INTO t1 VALUES (1),(2);
-EXPLAIN SELECT * FROM t1 WHERE 3 IN ( SELECT 4 UNION SELECT 5 );
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE
-2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
-3	UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
-NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	
-DROP TABLE t1;
-#
-# MDEV-7860: EXPLAIN FORMAT=JSON crashes for loose scan query
-#
-create table t2(a int);
-insert into t2 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
-create table t1 (a int, b int, c int, d int, key(a,b,c));
-insert into t1 select  A.a, B.a, C.a, D.a from t2 A, t2 B, t2 C, t2 D;
-explain select count(distinct b) from t1 group by a;
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	a	10	NULL	101	Using index for group-by
-explain format=json select count(distinct b) from t1 group by a;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "t1",
-      "access_type": "range",
-      "key": "a",
-      "key_length": "10",
-      "used_key_parts": ["a", "b"],
-      "rows": 101,
-      "filtered": 100,
-      "using_index_for_group_by": true
-    }
-  }
-}
-analyze format=json select count(distinct b) from t1 group by a;
-ANALYZE
-{
-  "query_block": {
-    "select_id": 1,
-    "r_loops": 1,
-    "r_total_time_ms": "REPLACED",
-    "table": {
-      "table_name": "t1",
-      "access_type": "range",
-      "key": "a",
-      "key_length": "10",
-      "used_key_parts": ["a", "b"],
-      "r_loops": 1,
-      "rows": 101,
-      "r_rows": 100,
-      "r_total_time_ms": "REPLACED",
-      "filtered": 100,
-      "r_filtered": 100,
-      "using_index_for_group_by": true
-    }
-  }
-}
-drop table t1,t2;
-#
-# Try both variants of LooseScan (data/queries borrowed from group_min_max.test)
-#
-create table t1 (
-a1 char(64), a2 char(64), b char(16), c char(16) not null, d char(16), dummy char(248) default ' '
-);
-insert into t1 (a1, a2, b, c, d) values
-('a','a','a','a111','xy1'),('a','a','a','b111','xy2'),('a','a','a','c111','xy3'),('a','a','a','d111','xy4'),
-('a','a','b','e112','xy1'),('a','a','b','f112','xy2'),('a','a','b','g112','xy3'),('a','a','b','h112','xy4'),
-('a','b','a','i121','xy1'),('a','b','a','j121','xy2'),('a','b','a','k121','xy3'),('a','b','a','l121','xy4'),
-('a','b','b','m122','xy1'),('a','b','b','n122','xy2'),('a','b','b','o122','xy3'),('a','b','b','p122','xy4'),
-('b','a','a','a211','xy1'),('b','a','a','b211','xy2'),('b','a','a','c211','xy3'),('b','a','a','d211','xy4'),
-('b','a','b','e212','xy1'),('b','a','b','f212','xy2'),('b','a','b','g212','xy3'),('b','a','b','h212','xy4'),
-('b','b','a','i221','xy1'),('b','b','a','j221','xy2'),('b','b','a','k221','xy3'),('b','b','a','l221','xy4'),
-('b','b','b','m222','xy1'),('b','b','b','n222','xy2'),('b','b','b','o222','xy3'),('b','b','b','p222','xy4'),
-('c','a','a','a311','xy1'),('c','a','a','b311','xy2'),('c','a','a','c311','xy3'),('c','a','a','d311','xy4'),
-('c','a','b','e312','xy1'),('c','a','b','f312','xy2'),('c','a','b','g312','xy3'),('c','a','b','h312','xy4'),
-('c','b','a','i321','xy1'),('c','b','a','j321','xy2'),('c','b','a','k321','xy3'),('c','b','a','l321','xy4'),
-('c','b','b','m322','xy1'),('c','b','b','n322','xy2'),('c','b','b','o322','xy3'),('c','b','b','p322','xy4'),
-('d','a','a','a411','xy1'),('d','a','a','b411','xy2'),('d','a','a','c411','xy3'),('d','a','a','d411','xy4'),
-('d','a','b','e412','xy1'),('d','a','b','f412','xy2'),('d','a','b','g412','xy3'),('d','a','b','h412','xy4'),
-('d','b','a','i421','xy1'),('d','b','a','j421','xy2'),('d','b','a','k421','xy3'),('d','b','a','l421','xy4'),
-('d','b','b','m422','xy1'),('d','b','b','n422','xy2'),('d','b','b','o422','xy3'),('d','b','b','p422','xy4'),
-('a','a','a','a111','xy1'),('a','a','a','b111','xy2'),('a','a','a','c111','xy3'),('a','a','a','d111','xy4'),
-('a','a','b','e112','xy1'),('a','a','b','f112','xy2'),('a','a','b','g112','xy3'),('a','a','b','h112','xy4'),
-('a','b','a','i121','xy1'),('a','b','a','j121','xy2'),('a','b','a','k121','xy3'),('a','b','a','l121','xy4'),
-('a','b','b','m122','xy1'),('a','b','b','n122','xy2'),('a','b','b','o122','xy3'),('a','b','b','p122','xy4'),
-('b','a','a','a211','xy1'),('b','a','a','b211','xy2'),('b','a','a','c211','xy3'),('b','a','a','d211','xy4'),
-('b','a','b','e212','xy1'),('b','a','b','f212','xy2'),('b','a','b','g212','xy3'),('b','a','b','h212','xy4'),
-('b','b','a','i221','xy1'),('b','b','a','j221','xy2'),('b','b','a','k221','xy3'),('b','b','a','l221','xy4'),
-('b','b','b','m222','xy1'),('b','b','b','n222','xy2'),('b','b','b','o222','xy3'),('b','b','b','p222','xy4'),
-('c','a','a','a311','xy1'),('c','a','a','b311','xy2'),('c','a','a','c311','xy3'),('c','a','a','d311','xy4'),
-('c','a','b','e312','xy1'),('c','a','b','f312','xy2'),('c','a','b','g312','xy3'),('c','a','b','h312','xy4'),
-('c','b','a','i321','xy1'),('c','b','a','j321','xy2'),('c','b','a','k321','xy3'),('c','b','a','l321','xy4'),
-('c','b','b','m322','xy1'),('c','b','b','n322','xy2'),('c','b','b','o322','xy3'),('c','b','b','p322','xy4'),
-('d','a','a','a411','xy1'),('d','a','a','b411','xy2'),('d','a','a','c411','xy3'),('d','a','a','d411','xy4'),
-('d','a','b','e412','xy1'),('d','a','b','f412','xy2'),('d','a','b','g412','xy3'),('d','a','b','h412','xy4'),
-('d','b','a','i421','xy1'),('d','b','a','j421','xy2'),('d','b','a','k421','xy3'),('d','b','a','l421','xy4'),
-('d','b','b','m422','xy1'),('d','b','b','n422','xy2'),('d','b','b','o422','xy3'),('d','b','b','p422','xy4');
-create index idx_t1_0 on t1 (a1);
-create index idx_t1_1 on t1 (a1,a2,b,c);
-create index idx_t1_2 on t1 (a1,a2,b);
-analyze table t1;
-Table	Op	Msg_type	Msg_text
-test.t1	analyze	status	Table is already up to date
-explain select count(distinct a1,a2,b) from t1 where (a2 >= 'b') and (b = 'a');
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	17	Using where; Using index for group-by
-explain select count(distinct a1,a2,b,c) from t1 where (a2 >= 'b') and (b = 'a') and (c = 'i121');
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	65	Using where; Using index for group-by (scanning)
-explain format=json select count(distinct a1,a2,b) from t1 where (a2 >= 'b') and (b = 'a');
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "t1",
-      "access_type": "range",
-      "key": "idx_t1_1",
-      "key_length": "147",
-      "used_key_parts": ["a1", "a2", "b"],
-      "rows": 17,
-      "filtered": 100,
-      "attached_condition": "t1.b = 'a' and t1.a2 >= 'b'",
-      "using_index_for_group_by": true
-    }
-  }
-}
-explain format=json select count(distinct a1,a2,b,c) from t1 where (a2 >= 'b') and (b = 'a') and (c = 'i121');
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "t1",
-      "access_type": "range",
-      "key": "idx_t1_1",
-      "key_length": "163",
-      "used_key_parts": ["a1", "a2", "b", "c"],
-      "rows": 65,
-      "filtered": 100,
-      "attached_condition": "t1.b = 'a' and t1.c = 'i121' and t1.a2 >= 'b'",
-      "using_index_for_group_by": "scanning"
-    }
-  }
-}
-drop table t1;
-#
-# MDEV-8786 Wrong result for SELECT FORMAT=JSON * FROM t1 WHERE a=_latin1 0xDF
-#
-CREATE TABLE t1 (a VARCHAR(10) CHARACTER SET latin1);
-INSERT INTO t1 VALUES ('a'),('b');
-EXPLAIN FORMAT=JSON SELECT * FROM t1 WHERE a=_latin1 0xDF;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "t1",
-      "access_type": "ALL",
-      "rows": 2,
-      "filtered": 100,
-      "attached_condition": "t1.a = _latin1'\xDF'"
-    }
-  }
-}
-DROP TABLE t1;
-#
-# MDEV-8785 Wrong results for EXPLAIN EXTENDED...WHERE NULLIF(latin1_col, _utf8'a' COLLATE utf8_bin) IS NOT NULL
-#
-CREATE TABLE t1 (a VARCHAR(10) CHARACTER SET latin1);
-INSERT INTO t1 VALUES ('a'),('A');
-EXPLAIN FORMAT=JSON SELECT * FROM t1 WHERE NULLIF(a,_utf8'a' COLLATE utf8_bin);
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "t1",
-      "access_type": "ALL",
-      "rows": 2,
-      "filtered": 100,
-      "attached_condition": "(case when convert(t1.a using utf8) = <cache>(_utf8'a' collate utf8_bin) then NULL else t1.a end)"
-    }
-  }
-}
-DROP TABLE t1;
-#
-# MDEV-7970: EXPLAIN FORMAT=JSON does not print HAVING
-#
-create table t0(a int);
-insert into t0 values (0),(1),(2),(3);
-create table t1(a int);
-insert into t1 select A.a + B.a* 10 + C.a * 100 from t0 A, t0 B, t0 C;
-create table t2 (
-a int, 
-b int, 
-key (a)
-);
-insert into t2 select A.a*1000 + B.a, A.a*1000 + B.a from t0 A, t1 B;
-# normal HAVING
-explain format=json select a, max(b) as TOP from t2 group by a having TOP > a;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "having_condition": "TOP > t2.a",
-    "filesort": {
-      "sort_key": "t2.a",
-      "temporary_table": {
-        "table": {
-          "table_name": "t2",
-          "access_type": "ALL",
-          "rows": 256,
-          "filtered": 100
-        }
-      }
-    }
-  }
-}
-# HAVING is always TRUE (not printed)
-explain format=json select a, max(b) as TOP from t2 group by a having 1<>2;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "filesort": {
-      "sort_key": "t2.a",
-      "temporary_table": {
-        "table": {
-          "table_name": "t2",
-          "access_type": "ALL",
-          "rows": 256,
-          "filtered": 100
-        }
-      }
-    }
-  }
-}
-# HAVING is always FALSE (intercepted by message)
-explain format=json select a, max(b) as TOP from t2 group by a having 1=2;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "message": "Impossible HAVING"
-    }
-  }
-}
-# HAVING is absent
-explain format=json select a, max(b) as TOP from t2 group by a;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "filesort": {
-      "sort_key": "t2.a",
-      "temporary_table": {
-        "table": {
-          "table_name": "t2",
-          "access_type": "ALL",
-          "rows": 256,
-          "filtered": 100
-        }
-      }
-    }
-  }
-}
-drop table t0, t1, t2;
-#
-# MDEV-8829: Assertion `0' failed in Explain_table_access::tag_to_json
-#
-# Check ET_CONST_ROW_NOT_FOUND
-create table t1 (i int) engine=myisam;
-explain 
-select * from t1;
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
-explain format=json
-select * from t1;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "t1",
-      "access_type": "system",
-      "rows": 0,
-      "filtered": 0,
-      "const_row_not_found": true
-    }
-  }
-}
-analyze format=json 
-select * from t1;
-ANALYZE
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "message": "no matching row in const table"
-    }
-  }
-}
-drop table t1;
-# Check ET_IMPOSSIBLE_ON_CONDITION
-create table t1 (a int);
-create table t2 (pk int primary key);
-insert into t1 values (1),(2);
-insert into t2 values (1),(2);
-explain 
-select * from t1 left join t2 on t2.pk > 10 and t2.pk < 0;
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	const	PRIMARY	NULL	NULL	NULL	1	Impossible ON condition
-1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	
-explain format=json
-select * from t1 left join t2 on t2.pk > 10 and t2.pk < 0;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "const_condition": "1",
-    "table": {
-      "table_name": "t2",
-      "access_type": "const",
-      "possible_keys": ["PRIMARY"],
-      "rows": 1,
-      "filtered": 100,
-      "impossible_on_condition": true
-    },
-    "table": {
-      "table_name": "t1",
-      "access_type": "ALL",
-      "rows": 2,
-      "filtered": 100
-    }
-  }
-}
-analyze format=json
-select * from t1 left join t2 on t2.pk > 10 and t2.pk < 0;
-ANALYZE
-{
-  "query_block": {
-    "select_id": 1,
-    "r_loops": 1,
-    "r_total_time_ms": "REPLACED",
-    "const_condition": "1",
-    "table": {
-      "table_name": "t2",
-      "access_type": "const",
-      "possible_keys": ["PRIMARY"],
-      "r_loops": 0,
-      "rows": 1,
-      "r_rows": null,
-      "filtered": 100,
-      "r_filtered": null,
-      "impossible_on_condition": true
-    },
-    "table": {
-      "table_name": "t1",
-      "access_type": "ALL",
-      "r_loops": 1,
-      "rows": 2,
-      "r_rows": 2,
-      "r_total_time_ms": "REPLACED",
-      "filtered": 100,
-      "r_filtered": 100
-    }
-  }
-}
-# Check ET_NOT_EXISTS:
-explain
-select * from t1 left join t2 on t2.pk=t1.a where  t2.pk is null;
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	
-1	SIMPLE	t2	eq_ref	PRIMARY	PRIMARY	4	test.t1.a	1	Using where; Using index; Not exists
-explain format=json
-select * from t1 left join t2 on t2.pk=t1.a where  t2.pk is null;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "t1",
-      "access_type": "ALL",
-      "rows": 2,
-      "filtered": 100
-    },
-    "table": {
-      "table_name": "t2",
-      "access_type": "eq_ref",
-      "possible_keys": ["PRIMARY"],
-      "key": "PRIMARY",
-      "key_length": "4",
-      "used_key_parts": ["pk"],
-      "ref": ["test.t1.a"],
-      "rows": 1,
-      "filtered": 100,
-      "attached_condition": "trigcond(t2.pk is null) and trigcond(trigcond(t1.a is not null))",
-      "using_index": true,
-      "not_exists": true
-    }
-  }
-}
-analyze format=json
-select * from t1 left join t2 on t2.pk=t1.a where  t2.pk is null;
-ANALYZE
-{
-  "query_block": {
-    "select_id": 1,
-    "r_loops": 1,
-    "r_total_time_ms": "REPLACED",
-    "table": {
-      "table_name": "t1",
-      "access_type": "ALL",
-      "r_loops": 1,
-      "rows": 2,
-      "r_rows": 2,
-      "r_total_time_ms": "REPLACED",
-      "filtered": 100,
-      "r_filtered": 100
-    },
-    "table": {
-      "table_name": "t2",
-      "access_type": "eq_ref",
-      "possible_keys": ["PRIMARY"],
-      "key": "PRIMARY",
-      "key_length": "4",
-      "used_key_parts": ["pk"],
-      "ref": ["test.t1.a"],
-      "r_loops": 2,
-      "rows": 1,
-      "r_rows": 1,
-      "r_total_time_ms": "REPLACED",
-      "filtered": 100,
-      "r_filtered": 100,
-      "attached_condition": "trigcond(t2.pk is null) and trigcond(trigcond(t1.a is not null))",
-      "using_index": true,
-      "not_exists": true
-    }
-  }
-}
-# Check ET_DISTINCT
-explain
-select distinct t1.a from t1 join t2 on t2.pk=t1.a;
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	Using where; Using temporary
-1	SIMPLE	t2	eq_ref	PRIMARY	PRIMARY	4	test.t1.a	1	Using index; Distinct
-explain format=json
-select distinct t1.a from t1 join t2 on t2.pk=t1.a;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "temporary_table": {
-      "table": {
-        "table_name": "t1",
-        "access_type": "ALL",
-        "rows": 2,
-        "filtered": 100,
-        "attached_condition": "t1.a is not null"
-      },
-      "table": {
-        "table_name": "t2",
-        "access_type": "eq_ref",
-        "possible_keys": ["PRIMARY"],
-        "key": "PRIMARY",
-        "key_length": "4",
-        "used_key_parts": ["pk"],
-        "ref": ["test.t1.a"],
-        "rows": 1,
-        "filtered": 100,
-        "using_index": true,
-        "distinct": true
-      }
-    }
-  }
-}
-analyze format=json
-select distinct t1.a from t1 join t2 on t2.pk=t1.a;
-ANALYZE
-{
-  "query_block": {
-    "select_id": 1,
-    "r_loops": 1,
-    "r_total_time_ms": "REPLACED",
-    "temporary_table": {
-      "table": {
-        "table_name": "t1",
-        "access_type": "ALL",
-        "r_loops": 1,
-        "rows": 2,
-        "r_rows": 2,
-        "r_total_time_ms": "REPLACED",
-        "filtered": 100,
-        "r_filtered": 100,
-        "attached_condition": "t1.a is not null"
-      },
-      "table": {
-        "table_name": "t2",
-        "access_type": "eq_ref",
-        "possible_keys": ["PRIMARY"],
-        "key": "PRIMARY",
-        "key_length": "4",
-        "used_key_parts": ["pk"],
-        "ref": ["test.t1.a"],
-        "r_loops": 2,
-        "rows": 1,
-        "r_rows": 1,
-        "r_total_time_ms": "REPLACED",
-        "filtered": 100,
-        "r_filtered": 100,
-        "using_index": true,
-        "distinct": true
-      }
-    }
-  }
-}
-drop table t1,t2;
-# Check ET_USING_INDEX_CONDITION_BKA
-create table t1(a int);
-insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
-create table t2(a int);
-insert into t2 select A.a + B.a* 10 + C.a * 100 from t1 A, t1 B, t1 C;
-create table t3(a int, b int);
-insert into t3 select a,a from t1;
-create table t4(a int, b int, c int, filler char(100), key (a,b));
-insert into t4 select a,a,a, 'filler-data' from t2;
-set @tmp_optimizer_switch=@@optimizer_switch;
-set @tmp_join_cache_level=@@join_cache_level;
-set optimizer_switch='mrr=on';
-set join_cache_level=6;
-explain
-select * from t3,t4 where t3.a=t4.a and (t4.b+1 <= t3.b+1);
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t3	ALL	NULL	NULL	NULL	NULL	10	Using where
-1	SIMPLE	t4	ref	a	a	5	test.t3.a	1	Using index condition(BKA); Using join buffer (flat, BKA join); Rowid-ordered scan
-explain format=json
-select * from t3,t4 where t3.a=t4.a and (t4.b+1 <= t3.b+1);
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "t3",
-      "access_type": "ALL",
-      "rows": 10,
-      "filtered": 100,
-      "attached_condition": "t3.a is not null"
-    },
-    "block-nl-join": {
-      "table": {
-        "table_name": "t4",
-        "access_type": "ref",
-        "possible_keys": ["a"],
-        "key": "a",
-        "key_length": "5",
-        "used_key_parts": ["a"],
-        "ref": ["test.t3.a"],
-        "rows": 1,
-        "filtered": 100,
-        "index_condition_bka": "t4.b + 1 <= t3.b + 1"
-      },
-      "buffer_type": "flat",
-      "buffer_size": "256Kb",
-      "join_type": "BKA",
-      "mrr_type": "Rowid-ordered scan"
-    }
-  }
-}
-analyze format=json
-select * from t3,t4 where t3.a=t4.a and (t4.b+1 <= t3.b+1);
-ANALYZE
-{
-  "query_block": {
-    "select_id": 1,
-    "r_loops": 1,
-    "r_total_time_ms": "REPLACED",
-    "table": {
-      "table_name": "t3",
-      "access_type": "ALL",
-      "r_loops": 1,
-      "rows": 10,
-      "r_rows": 10,
-      "r_total_time_ms": "REPLACED",
-      "filtered": 100,
-      "r_filtered": 100,
-      "attached_condition": "t3.a is not null"
-    },
-    "block-nl-join": {
-      "table": {
-        "table_name": "t4",
-        "access_type": "ref",
-        "possible_keys": ["a"],
-        "key": "a",
-        "key_length": "5",
-        "used_key_parts": ["a"],
-        "ref": ["test.t3.a"],
-        "r_loops": 1,
-        "rows": 1,
-        "r_rows": 10,
-        "r_total_time_ms": "REPLACED",
-        "filtered": 100,
-        "r_filtered": 100,
-        "index_condition_bka": "t4.b + 1 <= t3.b + 1"
-      },
-      "buffer_type": "flat",
-      "buffer_size": "256Kb",
-      "join_type": "BKA",
-      "mrr_type": "Rowid-ordered scan",
-      "r_filtered": 100
-    }
-  }
-}
-set optimizer_switch=@tmp_optimizer_switch;
-set join_cache_level=@tmp_join_cache_level;
-drop table t1,t2,t3,t4;
-#
-# MDEV-9652: EXPLAIN FORMAT=JSON should show outer_ref_cond
-#
-create table t0(a int);
-insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
-create table t1 (a int, b int);
-insert into t1 select a,a from t0;
-explain format=json 
-select a, (select max(a) from t1 where t0.a<5 and t1.b<t0.a) from t0;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "table": {
-      "table_name": "t0",
-      "access_type": "ALL",
-      "rows": 10,
-      "filtered": 100
-    },
-    "subqueries": [
-      {
-        "expression_cache": {
-          "state": "uninitialized",
-          "query_block": {
-            "select_id": 2,
-            "outer_ref_condition": "t0.a < 5",
-            "table": {
-              "table_name": "t1",
-              "access_type": "ALL",
-              "rows": 10,
-              "filtered": 100,
-              "attached_condition": "t1.b < t0.a"
-            }
-          }
-        }
-      }
-    ]
-  }
-}
-drop table t0,t1;
-#
-# MDEV-10844: EXPLAIN FORMAT=JSON doesn't show order direction for filesort
-#
-create table t1 (a int, b int);
-insert into t1 values (1,2),(3,4),(2,3);
-explain format=json select * from t1 order by a, b desc;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "read_sorted_file": {
-      "filesort": {
-        "sort_key": "t1.a, t1.b desc",
-        "table": {
-          "table_name": "t1",
-          "access_type": "ALL",
-          "rows": 3,
-          "filtered": 100
-        }
-      }
-    }
-  }
-}
-explain format=json select * from t1 order by a desc, b desc;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "read_sorted_file": {
-      "filesort": {
-        "sort_key": "t1.a desc, t1.b desc",
-        "table": {
-          "table_name": "t1",
-          "access_type": "ALL",
-          "rows": 3,
-          "filtered": 100
-        }
-      }
-    }
-  }
-}
-explain format=json select * from t1 order by a desc, b ;
-EXPLAIN
-{
-  "query_block": {
-    "select_id": 1,
-    "read_sorted_file": {
-      "filesort": {
-        "sort_key": "t1.a desc, t1.b",
-        "table": {
-          "table_name": "t1",
-          "access_type": "ALL",
-          "rows": 3,
-          "filtered": 100
-        }
-      }
-    }
-  }
-}
-drop table t1;