CREATE TABLE 1
COPY FROM 5
CREATE TABLE 1
COPY FROM 6
CREATE TABLE 1
COPY FROM 12
CREATE TABLE 1
INSERT 1
   xx
-----
false
SELECT 1
    xx
------
<NULL>
SELECT 1
  xx
----
true
SELECT 1
    xx
------
<NULL>
SELECT 1
   xx
-----
false
SELECT 1
  xx
----
true
SELECT 1
    xx
------
<NULL>
SELECT 1
    xx
------
<NULL>
SELECT 1
sno
---
SELECT 0
  xx
----
true
SELECT 1
   xx
-----
false
SELECT 1
  xx
----
true
SELECT 1
DROP TABLE 1
DROP TABLE 1
DROP TABLE 1
DROP TABLE 1
