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planner/core: add tests for prepare show statements #36458

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merged 3 commits into from
Jul 26, 2022
Merged

planner/core: add tests for prepare show statements #36458

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planner/core: add tests for PREPARE SHOW statements
tangenta Jul 22, 2022
c00b765
Merge branch 'master' into test-prepare-show
ti-chi-bot Jul 26, 2022
f66615b
Merge branch 'master' into test-prepare-show
ti-chi-bot Jul 26, 2022
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18 changes: 18 additions & 0 deletions planner/core/prepare_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -3113,3 +3113,21 @@ func TestPointGetForUpdateAutoCommitCache(t *testing.T) {
tk1.ResultSetToResult(rs, fmt.Sprintf("%v", rs)).Check(testkit.Rows())
tk1.MustQuery("select @@last_plan_from_cache").Check(testkit.Rows("1"))
}

func TestPreparedShowStatements(t *testing.T) {
store, clean := testkit.CreateMockStore(t)
defer clean()
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")

tk.MustExec(`prepare p1 from 'show variables like "tidb_snapshot"';`)
tk.MustQuery(`execute p1;`).Check(testkit.Rows("tidb_snapshot "))

tk.MustExec("create table t (a int, b int);")
tk.MustExec(`prepare p2 from "show columns from t where field = 'a'";`) // Only column `a` is selected.
tk.MustQuery(`execute p2;`).Check(testkit.Rows("a int(11) YES <nil> "))

tk.MustExec("create table t1 (a int, b int);")
tk.MustExec(`prepare p3 from "show tables where tables_in_test = 't1'";`) // Only table `t1` is selected.
tk.MustQuery("execute p3;").Check(testkit.Rows("t1"))
}