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executor: fix issue of KEY_COLUMN_USAGE table return wrong result about foreign key column #40491

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merged 5 commits into from
Jan 11, 2023
Merged

executor: fix issue of KEY_COLUMN_USAGE table return wrong result about foreign key column #40491

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12b7532
executor: fix issue of KEY_COLUMN_USAGE about foreign key column
crazycs520 Jan 11, 2023
542d7f5
Merge branch 'master' into fk-fix10
crazycs520 Jan 11, 2023
0d9730f
Merge branch 'master' into fk-fix10
hawkingrei Jan 11, 2023
5cb45ef
Merge branch 'master' into fk-fix10
ti-chi-bot Jan 11, 2023
95f07f9
Merge branch 'master' into fk-fix10
ti-chi-bot Jan 11, 2023
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12 changes: 12 additions & 0 deletions executor/fktest/foreign_key_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -2733,3 +2733,15 @@ func TestForeignKeyAndMemoryTracker(t *testing.T) {
tk.MustExec("update t1 set id=id+100000 where id=1")
tk.MustQuery("select id,pid from t1 where id<3 or pid is null order by id").Check(testkit.Rows("2 1", "100001 <nil>"))
}

func TestForeignKeyMetaInKeyColumnUsage(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("set @@foreign_key_checks=1")
tk.MustExec("use test")
tk.MustExec("create table t1 (a int, b int, index(a, b));")
tk.MustExec("create table t2 (a int, b int, index(a, b), constraint fk foreign key(a, b) references t1(a, b));")
tk.MustQuery("select CONSTRAINT_NAME, TABLE_SCHEMA, TABLE_NAME, COLUMN_NAME, REFERENCED_TABLE_SCHEMA, REFERENCED_TABLE_NAME, REFERENCED_COLUMN_NAME from " +
"INFORMATION_SCHEMA.KEY_COLUMN_USAGE where CONSTRAINT_SCHEMA='test' and TABLE_NAME='t2' and REFERENCED_TABLE_SCHEMA is not null and REFERENCED_COLUMN_NAME is not null;").
Check(testkit.Rows("fk test t2 a test t1 a", "fk test t2 b test t1 b"))
}
8 changes: 4 additions & 4 deletions executor/infoschema_reader.go
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Expand Up @@ -1677,11 +1677,11 @@ func keyColumnUsageInTable(schema *model.DBInfo, table *model.TableInfo) [][]typ
}
}
for _, fk := range table.ForeignKeys {
fkRefCol := ""
if len(fk.RefCols) > 0 {
fkRefCol = fk.RefCols[0].O
}
for i, key := range fk.Cols {
fkRefCol := ""
if len(fk.RefCols) > i {
fkRefCol = fk.RefCols[i].O
}
col := nameToCol[key.L]
record := types.MakeDatums(
infoschema.CatalogVal, // CONSTRAINT_CATALOG
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