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EXPLAIN FORMAT=JSON: Add support for single-table UPDATE/DELETE.

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This commit is contained in:
Sergei Petrunia
2014-11-28 02:36:31 +03:00
parent 461dbd80d2
commit d5fbfb9a93
9 changed files with 409 additions and 197 deletions
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59
mysql-test/r/explain_json.result
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@ -199,7 +199,7 @@ EXPLAIN
},
{
"query_block": {
"select_id": 1,
"select_id": 2,
"table": {
"table_name": "B",
"access_type": "ALL",
@ -233,7 +233,7 @@ EXPLAIN
},
{
"query_block": {
"select_id": 1,
"select_id": 2,
"table": {
"table_name": "B",
"access_type": "ALL",
@ -265,7 +265,7 @@ EXPLAIN
"subqueries": [
{
"query_block": {
"select_id": 1,
"select_id": 2,
"table": {
"table_name": "t1",
"access_type": "ALL",
@ -295,7 +295,7 @@ EXPLAIN
"subqueries": [
{
"query_block": {
"select_id": 1,
"select_id": 2,
"table": {
"table_name": "t1",
"access_type": "ALL",
@ -342,4 +342,55 @@ EXPLAIN
}
}
drop table t1;
#
# Single-table UPDATE/DELETE
#
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))"
}
}
}
drop table t0;