Function TestAlterStatementPool

pkg/sql/ast/pool_ddl_test.go:770–816

============================================================ AlterStatement pool tests ============================================================

(t *testing.T)

// ============================================================

func TestAlterStatementPool(t *testing.T) {
	t.Run("Get returns non-nil", func(t *testing.T) {
		stmt := GetAlterStatement()
		if stmt == nil {
			t.Fatal("GetAlterStatement() returned nil")
		}
		PutAlterStatement(stmt)
	})

	t.Run("Put nil is safe", func(t *testing.T) {
		PutAlterStatement(nil)
	})

	t.Run("Fields zeroed after Put", func(t *testing.T) {
		stmt := GetAlterStatement()
		stmt.Type = AlterTypeTable
		stmt.Name = "users"
		stmt.Operation = &AlterTableOperation{
			Type:       AddColumn,
			ColumnName: &Ident{Name: "age"},
		}

		PutAlterStatement(stmt)

		if stmt.Type != 0 {
			t.Errorf("Type not cleared, got %v", stmt.Type)
		}
		if stmt.Name != "" {
			t.Errorf("Name not cleared, got %q", stmt.Name)
		}
		if stmt.Operation != nil {
			t.Error("Operation not cleared")
		}
	})

	t.Run("Pool roundtrip reuse", func(t *testing.T) {
		stmt1 := GetAlterStatement()
		stmt1.Name = "orders"
		PutAlterStatement(stmt1)

		stmt2 := GetAlterStatement()
		if stmt2.Name != "" {
			t.Errorf("Reused statement not clean, Name=%q", stmt2.Name)
		}
		PutAlterStatement(stmt2)
	})
}

// ============================================================
// ReleaseAST mixed DML + DDL test