Change constraint syntax to SQL92 style.
Add tests for PRIMARY KEY and UNIQUE clauses.
This commit is contained in:
Thomas G. Lockhart
parent
5d7c9119fa
commit
733f2a43cc
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@ -1,6 +1,10 @@
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--
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-- Check constraints
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-- Constraints can be specified with either DEFAULT or CHECK clauses.
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-- Constraints can be specified with:
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-- - DEFAULT clause
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-- - CHECK clauses
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-- - PRIMARY KEY clauses
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-- - UNIQUE clauses
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--
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--
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@ -8,24 +12,26 @@
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--
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CREATE TABLE DEFAULT_TBL (i int DEFAULT 100,
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x text DEFAULT 'vadim', f float8 DEFAULT 123.456);
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x text DEFAULT 'vadim', f float8 DEFAULT 123.456);
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INSERT INTO DEFAULT_TBL VALUES (1, 'thomas', 57.0613);
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INSERT INTO DEFAULT_TBL VALUES (1, 'bruce');
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INSERT INTO DEFAULT_TBL (i, f) VALUES (2, 987.654);
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INSERT INTO DEFAULT_TBL (x) VALUES ('tgl');
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INSERT INTO DEFAULT_TBL (x) VALUES ('marc');
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INSERT INTO DEFAULT_TBL VALUES (3, null, 1.0);
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SELECT '' AS four, * FROM DEFAULT_TBL;
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SELECT '' AS five, * FROM DEFAULT_TBL;
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CREATE SEQUENCE DEFAULT_SEQ;
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CREATE TABLE DEFAULTEXPR_TBL (i1 int DEFAULT 100 + (200-199) * 2,
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i2 int DEFAULT nextval('default_seq'));
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i2 int DEFAULT nextval('default_seq'));
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INSERT INTO DEFAULTEXPR_TBL VALUES (-1, -2);
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INSERT INTO DEFAULTEXPR_TBL (i1) VALUES (-3);
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INSERT INTO DEFAULTEXPR_TBL (i2) VALUES (-4);
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INSERT INTO DEFAULTEXPR_TBL (i2) VALUES (NULL);
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SELECT '' AS four, * FROM DEFAULTEXPR_TBL;
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-- errors
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@ -39,8 +45,8 @@ CREATE TABLE error_tbl (b1 bool DEFAULT 1 < 2);
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-- CHECK syntax
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--
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CREATE TABLE CHECK_TBL (x int)
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CONSTRAINT CHECK_CON CHECK (x > 3);
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CREATE TABLE CHECK_TBL (x int,
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CONSTRAINT CHECK_CON CHECK (x > 3));
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INSERT INTO CHECK_TBL VALUES (5);
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INSERT INTO CHECK_TBL VALUES (4);
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@ -49,9 +55,14 @@ INSERT INTO CHECK_TBL VALUES (2);
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INSERT INTO CHECK_TBL VALUES (6);
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INSERT INTO CHECK_TBL VALUES (1);
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SELECT '' AS three, * FROM CHECK_TBL;
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CREATE SEQUENCE CHECK_SEQ;
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CREATE TABLE CHECK2_TBL (x int, y text, z int)
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CONSTRAINT SEQUENCE_CON CHECK (x > 3 and y <> 'check failed' and x < 8);
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CREATE TABLE CHECK2_TBL (x int, y text, z int,
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CONSTRAINT SEQUENCE_CON
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CHECK (x > 3 and y <> 'check failed' and z < 8));
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INSERT INTO CHECK2_TBL VALUES (4, 'check ok', -2);
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INSERT INTO CHECK2_TBL VALUES (1, 'x check failed', -2);
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INSERT INTO CHECK2_TBL VALUES (5, 'z check failed', 10);
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@ -59,6 +70,8 @@ INSERT INTO CHECK2_TBL VALUES (0, 'check failed', -2);
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INSERT INTO CHECK2_TBL VALUES (6, 'check failed', 11);
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INSERT INTO CHECK2_TBL VALUES (7, 'check ok', 7);
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SELECT '' AS two, * from CHECK2_TBL;
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--
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-- Check constraints on INSERT
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--
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@ -66,15 +79,16 @@ INSERT INTO CHECK2_TBL VALUES (7, 'check ok', 7);
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CREATE SEQUENCE INSERT_SEQ;
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CREATE TABLE INSERT_TBL (x INT DEFAULT nextval('insert_seq'),
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y TEXT DEFAULT '-NULL-', z INT DEFAULT -1 * currval('insert_seq') )
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CONSTRAINT INSERT_CON CHECK (x >= 3 AND y <> 'check failed' AND x < 8),
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CHECK x + z = 0;
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y TEXT DEFAULT '-NULL-', z INT DEFAULT -1 * currval('insert_seq'),
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CONSTRAINT INSERT_CON CHECK (x >= 3 AND y <> 'check failed' AND x < 8),
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CHECK (x + z = 0));
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INSERT INTO INSERT_TBL VALUES (null, null, null);
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INSERT INTO INSERT_TBL(x,z) VALUES (2, -2);
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SELECT * FROM INSERT_TBL;
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SELECT nextval('insert_seq');
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SELECT '' AS zero, * FROM INSERT_TBL;
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SELECT 'one' AS one, nextval('insert_seq');
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INSERT INTO INSERT_TBL(y) VALUES ('Y');
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INSERT INTO INSERT_TBL(y) VALUES ('Y');
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@ -83,15 +97,21 @@ INSERT INTO INSERT_TBL(z,x) VALUES (-7, 7);
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INSERT INTO INSERT_TBL VALUES (5, 'check failed', -5);
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INSERT INTO INSERT_TBL VALUES (7, '!check failed', -7);
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INSERT INTO INSERT_TBL(y) VALUES ('-!NULL-');
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SELECT * FROM INSERT_TBL;
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SELECT '' AS four, * FROM INSERT_TBL;
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INSERT INTO INSERT_TBL(y,z) VALUES ('check failed', 4);
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INSERT INTO INSERT_TBL(x,y) VALUES (5, 'check failed');
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INSERT INTO INSERT_TBL(x,y) VALUES (5, '!check failed');
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INSERT INTO INSERT_TBL(y) VALUES ('-!NULL-');
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SELECT * FROM INSERT_TBL;
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SELECT nextval('insert_seq');
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SELECT '' AS six, * FROM INSERT_TBL;
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SELECT 'seven' AS one, nextval('insert_seq');
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INSERT INTO INSERT_TBL(y) VALUES ('Y');
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SELECT currval('insert_seq');
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SELECT 'eight' AS one, currval('insert_seq');
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--
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-- Check constraints on INSERT INTO
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@ -99,18 +119,23 @@ SELECT currval('insert_seq');
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DELETE FROM INSERT_TBL;
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DROP SEQUENCE INSERT_SEQ;
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CREATE SEQUENCE INSERT_SEQ START 4;
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CREATE TABLE TEMP (xd INT, yd TEXT, zd INT);
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INSERT INTO TEMP VALUES (null, 'Y', null);
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INSERT INTO TEMP VALUES (5, '!check failed', null);
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INSERT INTO TEMP VALUES (null, 'try again', null);
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INSERT INTO INSERT_TBL(y) select yd from TEMP;
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SELECT * FROM INSERT_TBL;
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SELECT '' AS three, * FROM INSERT_TBL;
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INSERT INTO INSERT_TBL SELECT * FROM TEMP WHERE yd = 'try again';
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INSERT INTO INSERT_TBL(y,z) SELECT yd, -7 FROM TEMP WHERE yd = 'try again';
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INSERT INTO INSERT_TBL(y,z) SELECT yd, -8 FROM TEMP WHERE yd = 'try again';
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SELECT * FROM INSERT_TBL;
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SELECT '' AS four, * FROM INSERT_TBL;
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DROP TABLE TEMP;
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@ -122,17 +147,87 @@ UPDATE INSERT_TBL SET x = NULL WHERE x = 6;
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UPDATE INSERT_TBL SET x = 6 WHERE x = 6;
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UPDATE INSERT_TBL SET x = -z, z = -x;
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UPDATE INSERT_TBL SET x = z, z = x;
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SELECT * FROM INSERT_TBL;
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-- DROP TABLE INSERT_TBL;
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--
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-- Check constraints on COPY FROM
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--
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CREATE TABLE COPY_TBL (x INT, y TEXT, z INT)
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CONSTRAINT COPY_CON CHECK (x > 3 AND y <> 'check failed' AND x < 7 );
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CREATE TABLE COPY_TBL (x INT, y TEXT, z INT,
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CONSTRAINT COPY_CON
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CHECK (x > 3 AND y <> 'check failed' AND x < 7 ));
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COPY COPY_TBL FROM '_OBJWD_/data/constro.data';
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SELECT * FROM COPY_TBL;
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SELECT '' AS two, * FROM COPY_TBL;
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COPY COPY_TBL FROM '_OBJWD_/data/constrf.data';
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SELECT * FROM COPY_TBL;
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--
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-- Primary keys
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--
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CREATE TABLE PRIMARY_TBL (i int PRIMARY KEY, t text);
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INSERT INTO PRIMARY_TBL VALUES (1, 'one');
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INSERT INTO PRIMARY_TBL VALUES (2, 'two');
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INSERT INTO PRIMARY_TBL VALUES (1, 'three');
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INSERT INTO PRIMARY_TBL VALUES (4, 'three');
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INSERT INTO PRIMARY_TBL VALUES (5, 'one');
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INSERT INTO PRIMARY_TBL (t) VALUES ('six');
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SELECT '' AS four, * FROM PRIMARY_TBL;
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DROP TABLE PRIMARY_TBL;
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CREATE TABLE PRIMARY_TBL (i int, t text,
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PRIMARY KEY(i,t));
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INSERT INTO PRIMARY_TBL VALUES (1, 'one');
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INSERT INTO PRIMARY_TBL VALUES (2, 'two');
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INSERT INTO PRIMARY_TBL VALUES (1, 'three');
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INSERT INTO PRIMARY_TBL VALUES (4, 'three');
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INSERT INTO PRIMARY_TBL VALUES (5, 'one');
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INSERT INTO PRIMARY_TBL (t) VALUES ('six');
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SELECT '' AS three, * FROM PRIMARY_TBL;
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DROP TABLE PRIMARY_TBL;
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--
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-- Unique keys
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--
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CREATE TABLE UNIQUE_TBL (i int UNIQUE, t text);
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INSERT INTO UNIQUE_TBL VALUES (1, 'one');
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INSERT INTO UNIQUE_TBL VALUES (2, 'two');
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INSERT INTO UNIQUE_TBL VALUES (1, 'three');
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INSERT INTO UNIQUE_TBL VALUES (4, 'four');
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INSERT INTO UNIQUE_TBL VALUES (5, 'one');
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INSERT INTO UNIQUE_TBL (t) VALUES ('six');
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INSERT INTO UNIQUE_TBL (t) VALUES ('seven');
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SELECT '' AS five, * FROM UNIQUE_TBL;
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DROP TABLE UNIQUE_TBL;
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CREATE TABLE UNIQUE_TBL (i int, t text,
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UNIQUE(i,t));
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INSERT INTO UNIQUE_TBL VALUES (1, 'one');
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INSERT INTO UNIQUE_TBL VALUES (2, 'two');
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INSERT INTO UNIQUE_TBL VALUES (1, 'three');
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INSERT INTO UNIQUE_TBL VALUES (1, 'one');
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INSERT INTO UNIQUE_TBL VALUES (5, 'one');
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INSERT INTO UNIQUE_TBL (t) VALUES ('six');
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SELECT '' AS five, * FROM UNIQUE_TBL;
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DROP TABLE UNIQUE_TBL;
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@ -1,23 +1,23 @@
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QUERY: CREATE TABLE DEFAULT_TBL (i int DEFAULT 100,
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x text DEFAULT 'vadim', f float8 DEFAULT 123.456);
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x text DEFAULT 'vadim', f float8 DEFAULT 123.456);
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QUERY: INSERT INTO DEFAULT_TBL VALUES (1, 'thomas', 57.0613);
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QUERY: INSERT INTO DEFAULT_TBL VALUES (1, 'bruce');
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QUERY: INSERT INTO DEFAULT_TBL (i, f) VALUES (2, 987.654);
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QUERY: INSERT INTO DEFAULT_TBL (x) VALUES ('tgl');
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QUERY: INSERT INTO DEFAULT_TBL (x) VALUES ('marc');
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QUERY: INSERT INTO DEFAULT_TBL VALUES (3, null, 1.0);
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QUERY: SELECT '' AS four, * FROM DEFAULT_TBL;
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four| i|x | f
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QUERY: SELECT '' AS five, * FROM DEFAULT_TBL;
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five| i|x | f
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----+---+------+-------
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| 1|thomas|57.0613
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| 1|bruce |123.456
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| 2|vadim |987.654
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|100|tgl |123.456
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|100|marc |123.456
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| 3| | 1
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(5 rows)
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QUERY: CREATE SEQUENCE DEFAULT_SEQ;
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QUERY: CREATE TABLE DEFAULTEXPR_TBL (i1 int DEFAULT 100 + (200-199) * 2,
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i2 int DEFAULT nextval('default_seq'));
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i2 int DEFAULT nextval('default_seq'));
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QUERY: INSERT INTO DEFAULTEXPR_TBL VALUES (-1, -2);
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QUERY: INSERT INTO DEFAULTEXPR_TBL (i1) VALUES (-3);
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QUERY: INSERT INTO DEFAULTEXPR_TBL (i2) VALUES (-4);
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@ -35,8 +35,8 @@ QUERY: CREATE TABLE error_tbl (i int DEFAULT (100, ));
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WARN:parser: parse error at or near ","
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QUERY: CREATE TABLE error_tbl (b1 bool DEFAULT 1 < 2);
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WARN:boolean expressions not supported in DEFAULT
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QUERY: CREATE TABLE CHECK_TBL (x int)
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CONSTRAINT CHECK_CON CHECK (x > 3);
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QUERY: CREATE TABLE CHECK_TBL (x int,
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CONSTRAINT CHECK_CON CHECK (x > 3));
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QUERY: INSERT INTO CHECK_TBL VALUES (5);
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QUERY: INSERT INTO CHECK_TBL VALUES (4);
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QUERY: INSERT INTO CHECK_TBL VALUES (3);
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@ -46,36 +46,53 @@ WARN:ExecAppend: rejected due to CHECK constraint check_con
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QUERY: INSERT INTO CHECK_TBL VALUES (6);
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QUERY: INSERT INTO CHECK_TBL VALUES (1);
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WARN:ExecAppend: rejected due to CHECK constraint check_con
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QUERY: SELECT '' AS three, * FROM CHECK_TBL;
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three|x
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-----+-
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|5
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|4
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|6
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(3 rows)
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QUERY: CREATE SEQUENCE CHECK_SEQ;
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QUERY: CREATE TABLE CHECK2_TBL (x int, y text, z int)
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CONSTRAINT SEQUENCE_CON CHECK (x > 3 and y <> 'check failed' and x < 8);
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QUERY: CREATE TABLE CHECK2_TBL (x int, y text, z int,
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CONSTRAINT SEQUENCE_CON
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CHECK (x > 3 and y <> 'check failed' and z < 8));
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QUERY: INSERT INTO CHECK2_TBL VALUES (4, 'check ok', -2);
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QUERY: INSERT INTO CHECK2_TBL VALUES (1, 'x check failed', -2);
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WARN:ExecAppend: rejected due to CHECK constraint sequence_con
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QUERY: INSERT INTO CHECK2_TBL VALUES (5, 'z check failed', 10);
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WARN:ExecAppend: rejected due to CHECK constraint sequence_con
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QUERY: INSERT INTO CHECK2_TBL VALUES (0, 'check failed', -2);
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WARN:ExecAppend: rejected due to CHECK constraint sequence_con
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QUERY: INSERT INTO CHECK2_TBL VALUES (6, 'check failed', 11);
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WARN:ExecAppend: rejected due to CHECK constraint sequence_con
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QUERY: INSERT INTO CHECK2_TBL VALUES (7, 'check ok', 7);
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QUERY: SELECT '' AS two, * from CHECK2_TBL;
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two|x|y | z
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---+-+--------+--
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|4|check ok|-2
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|7|check ok| 7
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(2 rows)
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QUERY: CREATE SEQUENCE INSERT_SEQ;
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QUERY: CREATE TABLE INSERT_TBL (x INT DEFAULT nextval('insert_seq'),
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y TEXT DEFAULT '-NULL-', z INT DEFAULT -1 * currval('insert_seq') )
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CONSTRAINT INSERT_CON CHECK (x >= 3 AND y <> 'check failed' AND x < 8),
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CHECK x + z = 0;
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y TEXT DEFAULT '-NULL-', z INT DEFAULT -1 * currval('insert_seq'),
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CONSTRAINT INSERT_CON CHECK (x >= 3 AND y <> 'check failed' AND x < 8),
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CHECK (x + z = 0));
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QUERY: INSERT INTO INSERT_TBL VALUES (null, null, null);
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WARN:ExecAppend: rejected due to CHECK constraint $2
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QUERY: INSERT INTO INSERT_TBL(x,z) VALUES (2, -2);
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WARN:ExecAppend: rejected due to CHECK constraint insert_con
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QUERY: SELECT * FROM INSERT_TBL;
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x|y|z
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-+-+-
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QUERY: SELECT '' AS zero, * FROM INSERT_TBL;
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zero|x|y|z
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----+-+-+-
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(0 rows)
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QUERY: SELECT nextval('insert_seq');
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nextval
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-------
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1
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QUERY: SELECT 'one' AS one, nextval('insert_seq');
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one|nextval
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---+-------
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one| 1
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(1 row)
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QUERY: INSERT INTO INSERT_TBL(y) VALUES ('Y');
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@ -88,13 +105,13 @@ QUERY: INSERT INTO INSERT_TBL VALUES (5, 'check failed', -5);
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WARN:ExecAppend: rejected due to CHECK constraint insert_con
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QUERY: INSERT INTO INSERT_TBL VALUES (7, '!check failed', -7);
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QUERY: INSERT INTO INSERT_TBL(y) VALUES ('-!NULL-');
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QUERY: SELECT * FROM INSERT_TBL;
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x|y | z
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-+-------------+--
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3|Y |-3
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7|-NULL- |-7
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7|!check failed|-7
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4|-!NULL- |-4
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QUERY: SELECT '' AS four, * FROM INSERT_TBL;
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four|x|y | z
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----+-+-------------+--
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|3|Y |-3
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|7|-NULL- |-7
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|7|!check failed|-7
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|4|-!NULL- |-4
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(4 rows)
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QUERY: INSERT INTO INSERT_TBL(y,z) VALUES ('check failed', 4);
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@ -103,29 +120,29 @@ QUERY: INSERT INTO INSERT_TBL(x,y) VALUES (5, 'check failed');
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WARN:ExecAppend: rejected due to CHECK constraint insert_con
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QUERY: INSERT INTO INSERT_TBL(x,y) VALUES (5, '!check failed');
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QUERY: INSERT INTO INSERT_TBL(y) VALUES ('-!NULL-');
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QUERY: SELECT * FROM INSERT_TBL;
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x|y | z
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-+-------------+--
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3|Y |-3
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7|-NULL- |-7
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7|!check failed|-7
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4|-!NULL- |-4
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5|!check failed|-5
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6|-!NULL- |-6
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QUERY: SELECT '' AS six, * FROM INSERT_TBL;
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six|x|y | z
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---+-+-------------+--
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|3|Y |-3
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|7|-NULL- |-7
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|7|!check failed|-7
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|4|-!NULL- |-4
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|5|!check failed|-5
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|6|-!NULL- |-6
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(6 rows)
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QUERY: SELECT nextval('insert_seq');
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nextval
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-------
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7
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QUERY: SELECT 'seven' AS one, nextval('insert_seq');
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one |nextval
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-----+-------
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seven| 7
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(1 row)
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QUERY: INSERT INTO INSERT_TBL(y) VALUES ('Y');
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WARN:ExecAppend: rejected due to CHECK constraint insert_con
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QUERY: SELECT currval('insert_seq');
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currval
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-------
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8
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QUERY: SELECT 'eight' AS one, currval('insert_seq');
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one |currval
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-----+-------
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eight| 8
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(1 row)
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QUERY: DELETE FROM INSERT_TBL;
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@ -137,12 +154,12 @@ QUERY: INSERT INTO TEMP VALUES (5, '!check failed', null);
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QUERY: INSERT INTO TEMP VALUES (null, 'try again', null);
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QUERY: INSERT INTO INSERT_TBL(y) select yd from TEMP;
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NOTICE:insert_seq.nextval: sequence was re-created
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QUERY: SELECT * FROM INSERT_TBL;
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x|y | z
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-+-------------+--
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4|Y |-4
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5|!check failed|-5
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6|try again |-6
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QUERY: SELECT '' AS three, * FROM INSERT_TBL;
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||||
three|x|y | z
|
||||
-----+-+-------------+--
|
||||
|4|Y |-4
|
||||
|5|!check failed|-5
|
||||
|6|try again |-6
|
||||
(3 rows)
|
||||
|
||||
QUERY: INSERT INTO INSERT_TBL SELECT * FROM TEMP WHERE yd = 'try again';
|
||||
|
|
@ -150,13 +167,13 @@ WARN:ExecAppend: rejected due to CHECK constraint $2
|
|||
QUERY: INSERT INTO INSERT_TBL(y,z) SELECT yd, -7 FROM TEMP WHERE yd = 'try again';
|
||||
QUERY: INSERT INTO INSERT_TBL(y,z) SELECT yd, -8 FROM TEMP WHERE yd = 'try again';
|
||||
WARN:ExecAppend: rejected due to CHECK constraint insert_con
|
||||
QUERY: SELECT * FROM INSERT_TBL;
|
||||
x|y | z
|
||||
-+-------------+--
|
||||
4|Y |-4
|
||||
5|!check failed|-5
|
||||
6|try again |-6
|
||||
7|try again |-7
|
||||
QUERY: SELECT '' AS four, * FROM INSERT_TBL;
|
||||
four|x|y | z
|
||||
----+-+-------------+--
|
||||
|4|Y |-4
|
||||
|5|!check failed|-5
|
||||
|6|try again |-6
|
||||
|7|try again |-7
|
||||
(4 rows)
|
||||
|
||||
QUERY: DROP TABLE TEMP;
|
||||
|
|
@ -175,14 +192,15 @@ x|y | z
|
|||
6|try again |-6
|
||||
(4 rows)
|
||||
|
||||
QUERY: CREATE TABLE COPY_TBL (x INT, y TEXT, z INT)
|
||||
CONSTRAINT COPY_CON CHECK (x > 3 AND y <> 'check failed' AND x < 7 );
|
||||
QUERY: CREATE TABLE COPY_TBL (x INT, y TEXT, z INT,
|
||||
CONSTRAINT COPY_CON
|
||||
CHECK (x > 3 AND y <> 'check failed' AND x < 7 ));
|
||||
QUERY: COPY COPY_TBL FROM '_OBJWD_/data/constro.data';
|
||||
QUERY: SELECT * FROM COPY_TBL;
|
||||
x|y |z
|
||||
-+-------------+-
|
||||
4|!check failed|5
|
||||
6|OK |4
|
||||
QUERY: SELECT '' AS two, * FROM COPY_TBL;
|
||||
two|x|y |z
|
||||
---+-+-------------+-
|
||||
|4|!check failed|5
|
||||
|6|OK |4
|
||||
(2 rows)
|
||||
|
||||
QUERY: COPY COPY_TBL FROM '_OBJWD_/data/constrf.data';
|
||||
|
|
@ -194,3 +212,83 @@ x|y |z
|
|||
6|OK |4
|
||||
(2 rows)
|
||||
|
||||
QUERY: CREATE TABLE PRIMARY_TBL (i int PRIMARY KEY, t text);
|
||||
QUERY: INSERT INTO PRIMARY_TBL VALUES (1, 'one');
|
||||
QUERY: INSERT INTO PRIMARY_TBL VALUES (2, 'two');
|
||||
QUERY: INSERT INTO PRIMARY_TBL VALUES (1, 'three');
|
||||
WARN:Cannot insert a duplicate key into a unique index.
|
||||
QUERY: INSERT INTO PRIMARY_TBL VALUES (4, 'three');
|
||||
QUERY: INSERT INTO PRIMARY_TBL VALUES (5, 'one');
|
||||
QUERY: INSERT INTO PRIMARY_TBL (t) VALUES ('six');
|
||||
WARN:ExecAppend: Fail to add null value in not null attribute i
|
||||
QUERY: SELECT '' AS four, * FROM PRIMARY_TBL;
|
||||
four|i|t
|
||||
----+-+-----
|
||||
|1|one
|
||||
|2|two
|
||||
|4|three
|
||||
|5|one
|
||||
(4 rows)
|
||||
|
||||
QUERY: DROP TABLE PRIMARY_TBL;
|
||||
QUERY: CREATE TABLE PRIMARY_TBL (i int, t text,
|
||||
PRIMARY KEY(i,t));
|
||||
QUERY: INSERT INTO PRIMARY_TBL VALUES (1, 'one');
|
||||
QUERY: INSERT INTO PRIMARY_TBL VALUES (2, 'two');
|
||||
QUERY: INSERT INTO PRIMARY_TBL VALUES (1, 'three');
|
||||
QUERY: INSERT INTO PRIMARY_TBL VALUES (4, 'three');
|
||||
QUERY: INSERT INTO PRIMARY_TBL VALUES (5, 'one');
|
||||
QUERY: INSERT INTO PRIMARY_TBL (t) VALUES ('six');
|
||||
WARN:ExecAppend: Fail to add null value in not null attribute i
|
||||
QUERY: SELECT '' AS three, * FROM PRIMARY_TBL;
|
||||
three|i|t
|
||||
-----+-+-----
|
||||
|1|one
|
||||
|2|two
|
||||
|1|three
|
||||
|4|three
|
||||
|5|one
|
||||
(5 rows)
|
||||
|
||||
QUERY: DROP TABLE PRIMARY_TBL;
|
||||
QUERY: CREATE TABLE UNIQUE_TBL (i int UNIQUE, t text);
|
||||
QUERY: INSERT INTO UNIQUE_TBL VALUES (1, 'one');
|
||||
QUERY: INSERT INTO UNIQUE_TBL VALUES (2, 'two');
|
||||
QUERY: INSERT INTO UNIQUE_TBL VALUES (1, 'three');
|
||||
WARN:Cannot insert a duplicate key into a unique index.
|
||||
QUERY: INSERT INTO UNIQUE_TBL VALUES (4, 'four');
|
||||
QUERY: INSERT INTO UNIQUE_TBL VALUES (5, 'one');
|
||||
QUERY: INSERT INTO UNIQUE_TBL (t) VALUES ('six');
|
||||
QUERY: INSERT INTO UNIQUE_TBL (t) VALUES ('seven');
|
||||
QUERY: SELECT '' AS five, * FROM UNIQUE_TBL;
|
||||
five|i|t
|
||||
----+-+-----
|
||||
|1|one
|
||||
|2|two
|
||||
|4|four
|
||||
|5|one
|
||||
| |six
|
||||
| |seven
|
||||
(6 rows)
|
||||
|
||||
QUERY: DROP TABLE UNIQUE_TBL;
|
||||
QUERY: CREATE TABLE UNIQUE_TBL (i int, t text,
|
||||
UNIQUE(i,t));
|
||||
QUERY: INSERT INTO UNIQUE_TBL VALUES (1, 'one');
|
||||
QUERY: INSERT INTO UNIQUE_TBL VALUES (2, 'two');
|
||||
QUERY: INSERT INTO UNIQUE_TBL VALUES (1, 'three');
|
||||
QUERY: INSERT INTO UNIQUE_TBL VALUES (1, 'one');
|
||||
WARN:Cannot insert a duplicate key into a unique index.
|
||||
QUERY: INSERT INTO UNIQUE_TBL VALUES (5, 'one');
|
||||
QUERY: INSERT INTO UNIQUE_TBL (t) VALUES ('six');
|
||||
QUERY: SELECT '' AS five, * FROM UNIQUE_TBL;
|
||||
five|i|t
|
||||
----+-+-----
|
||||
|1|one
|
||||
|2|two
|
||||
|1|three
|
||||
|5|one
|
||||
| |six
|
||||
(5 rows)
|
||||
|
||||
QUERY: DROP TABLE UNIQUE_TBL;
|
||||
|
|
|
|||
Loading…
Reference in New Issue