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