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|
QUERY: SELECT 1 AS one;
one
---
1
(1 row)
QUERY: SELECT 't'::bool AS true;
true
----
t
(1 row)
QUERY: SELECT 'f'::bool AS false;
false
-----
f
(1 row)
QUERY: SELECT 't'::bool or 'f'::bool AS true;
true
----
t
(1 row)
QUERY: SELECT 't'::bool and 'f'::bool AS false;
false
-----
f
(1 row)
QUERY: SELECT not 'f'::bool AS true;
true
----
t
(1 row)
QUERY: SELECT 't'::bool = 'f'::bool AS false;
false
-----
f
(1 row)
QUERY: SELECT 't'::bool <> 'f'::bool AS true;
true
----
t
(1 row)
QUERY: CREATE TABLE BOOLTBL1 (f1 bool);
QUERY: INSERT INTO BOOLTBL1 (f1) VALUES ('t'::bool);
QUERY: INSERT INTO BOOLTBL1 (f1) VALUES ('True'::bool);
QUERY: INSERT INTO BOOLTBL1 (f1) VALUES ('true'::bool);
QUERY: SELECT '' AS t_3, BOOLTBL1.*;
t_3|f1
---+--
|t
|t
|t
(3 rows)
QUERY: SELECT '' AS t_3, BOOLTBL1.*
FROM BOOLTBL1
WHERE f1 = 'true'::bool;
t_3|f1
---+--
|t
|t
|t
(3 rows)
QUERY: SELECT '' AS t_3, BOOLTBL1.*
FROM BOOLTBL1
WHERE f1 <> 'false'::bool;
t_3|f1
---+--
|t
|t
|t
(3 rows)
QUERY: SELECT '' AS zero, BOOLTBL1.*
FROM BOOLTBL1
WHERE booleq('false'::bool, f1);
zero|f1
----+--
(0 rows)
QUERY: INSERT INTO BOOLTBL1 (f1) VALUES ('f'::bool);
QUERY: SELECT '' AS f_1, BOOLTBL1.*
FROM BOOLTBL1
WHERE f1 = 'false'::bool;
f_1|f1
---+--
|f
(1 row)
QUERY: CREATE TABLE BOOLTBL2 (f1 bool);
QUERY: INSERT INTO BOOLTBL2 (f1) VALUES ('f'::bool);
QUERY: INSERT INTO BOOLTBL2 (f1) VALUES ('false'::bool);
QUERY: INSERT INTO BOOLTBL2 (f1) VALUES ('False'::bool);
QUERY: INSERT INTO BOOLTBL2 (f1) VALUES ('FALSE'::bool);
QUERY: INSERT INTO BOOLTBL2 (f1)
VALUES ('XXX'::bool);
WARN:Bad boolean external representation 'XXX'
QUERY: SELECT '' AS f_4, BOOLTBL2.*;
f_4|f1
---+--
|f
|f
|f
|f
(4 rows)
QUERY: SELECT '' AS tf_12, BOOLTBL1.*, BOOLTBL2.*
WHERE BOOLTBL2.f1 <> BOOLTBL1.f1;
tf_12|f1|f1
-----+--+--
|t |f
|t |f
|t |f
|t |f
|t |f
|t |f
|t |f
|t |f
|t |f
|t |f
|t |f
|t |f
(12 rows)
QUERY: SELECT '' AS tf_12, BOOLTBL1.*, BOOLTBL2.*
WHERE boolne(BOOLTBL2.f1,BOOLTBL1.f1);
tf_12|f1|f1
-----+--+--
|t |f
|t |f
|t |f
|t |f
|t |f
|t |f
|t |f
|t |f
|t |f
|t |f
|t |f
|t |f
(12 rows)
QUERY: SELECT '' AS ff_4, BOOLTBL1.*, BOOLTBL2.*
WHERE BOOLTBL2.f1 = BOOLTBL1.f1 and BOOLTBL1.f1 = 'false'::bool;
ff_4|f1|f1
----+--+--
|f |f
|f |f
|f |f
|f |f
(4 rows)
QUERY: SELECT '' AS tf_12_ff_4, BOOLTBL1.*, BOOLTBL2.*
WHERE BOOLTBL2.f1 = BOOLTBL1.f1 or BOOLTBL1.f1 = 'true'::bool
ORDER BY BOOLTBL1.f1, BOOLTBL2.f1;
tf_12_ff_4|f1|f1
----------+--+--
|f |f
|f |f
|f |f
|f |f
|t |f
|t |f
|t |f
|t |f
|t |f
|t |f
|t |f
|t |f
|t |f
|t |f
|t |f
|t |f
(16 rows)
QUERY: SELECT '' AS "True", BOOLTBL1.*
FROM BOOLTBL1
WHERE f1 IS TRUE;
True|f1
----+--
|t
|t
|t
(3 rows)
QUERY: SELECT '' AS "Not False", BOOLTBL1.*
FROM BOOLTBL1
WHERE f1 IS NOT FALSE;
Not False|f1
---------+--
|t
|t
|t
(3 rows)
QUERY: SELECT '' AS "False", BOOLTBL1.*
FROM BOOLTBL1
WHERE f1 IS FALSE;
False|f1
-----+--
|f
(1 row)
QUERY: SELECT '' AS "Not True", BOOLTBL1.*
FROM BOOLTBL1
WHERE f1 IS NOT TRUE;
Not True|f1
--------+--
|f
(1 row)
QUERY: DROP TABLE BOOLTBL1;
QUERY: DROP TABLE BOOLTBL2;
|
