109 lines
3.0 KiB
Plaintext
109 lines
3.0 KiB
Plaintext
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# 2007 Febuary 24
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#
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# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#***********************************************************************
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# This file implements regression tests for SQLite library.
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#
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# This file implements tests to verify that table column values
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# are pulled out of the database correctly.
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#
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# Long ago, the OP_Column opcode was sufficient to pull out the
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# value of a table column. But then we added the ALTER TABLE ADD COLUMN
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# feature. An added column might not actually exist in every row,
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# and so the OP_Column opcode has to contain a default value. Later
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# still we added a feature whereby a REAL value with no fractional
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# part is stored in the database file as an integer to save space.
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# After extracting the value, we have to call OP_RealAffinity to
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# convert it back to a REAL.
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#
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# The sqlite3ExprCodeGetColumn() routine was added to take care of
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# all of the complications above. The tests in this file attempt
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# to verify that sqlite3ExprCodeGetColumn() is used instead of a
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# raw OP_Column in all places where a table column is extracted from
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# the database.
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#
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# $Id: tkt2251.test,v 1.2 2007/09/12 17:01:45 danielk1977 Exp $
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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ifcapable !altertable {
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finish_test
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return
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}
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# Create sample data. Verify that the default value and type of an added
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# column is correct for aggregates.
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do_test tkt2251-1.1 {
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execsql {
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CREATE TABLE t1(a INTEGER);
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INSERT INTO t1 VALUES(1);
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INSERT INTO t1 VALUES(1);
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INSERT INTO t1 VALUES(2);
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INSERT INTO t1 VALUES(9);
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INSERT INTO t1 VALUES(9);
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INSERT INTO t1 VALUES(9);
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INSERT INTO t1 VALUES(3);
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INSERT INTO t1 VALUES(2);
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ALTER TABLE t1 ADD COLUMN b REAL DEFAULT 4.0;
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SELECT avg(b), typeof(avg(b)) FROM t1;
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}
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} {4.0 real}
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do_test tkt2251-1.2 {
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execsql {
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SELECT sum(b), typeof(sum(b)) FROM t1;
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}
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} {32.0 real}
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do_test tkt2251-1.3 {
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execsql {
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SELECT a, sum(b), typeof(sum(b)) FROM t1 GROUP BY a ORDER BY a;
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}
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} {1 8.0 real 2 8.0 real 3 4.0 real 9 12.0 real}
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# Make sure that the REAL value comes out when values are accessed
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# by index.
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#
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do_test tkt2251-2.1 {
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execsql {
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SELECT b, typeof(b) FROM t1 WHERE a=3;
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}
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} {4.0 real}
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do_test tkt2251-2.2 {
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execsql {
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CREATE INDEX t1i1 ON t1(a,b);
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SELECT b, typeof(b) FROM t1 WHERE a=3;
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}
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} {4.0 real}
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do_test tkt2251-2.3 {
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execsql {
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REINDEX;
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SELECT b, typeof(b) FROM t1 WHERE a=3;
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}
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} {4.0 real}
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# Make sure the correct REAL value is used when copying from one
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# table to another.
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#
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do_test tkt2251-3.1 {
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execsql {
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CREATE TABLE t2(x,y);
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INSERT INTO t2 SELECT * FROM t1;
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SELECT y, typeof(y) FROM t2 WHERE x=3;
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}
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} {4.0 real}
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do_test tkt2251-3.2 {
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execsql {
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CREATE TABLE t3 AS SELECT * FROM t1;
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SELECT b, typeof(b) FROM t3 WHERE a=3;
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}
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} {4.0 real}
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finish_test
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