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third_party/sqlite/src/test/tkt2822.test

Index: third_party/sqlite/src/test/tkt2822.test
diff --git a/third_party/sqlite/src/test/tkt2822.test b/third_party/sqlite/src/test/tkt2822.test
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+# 2007 Dec 4
+#
+# 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 is to test that the issues surrounding expressions in
+# ORDER BY clauses on compound SELECT statements raised by ticket
+# #2822 have been dealt with.
+#
+# $Id: tkt2822.test,v 1.6 2008/08/20 16:35:10 drh Exp $
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+ifcapable !compound {
+  finish_test
+  return
+}
+
+# The ORDER BY matching algorithm is three steps:
+# 
+#   (1)  If the ORDER BY term is an integer constant i, then
+#        sort by the i-th column of the result set.
+# 
+#   (2)  If the ORDER BY term is an identifier (not x.y or x.y.z
+#        but simply x) then look for a column alias with the same
+#        name.  If found, then sort by that column.
+# 
+#   (3)  Evaluate the term as an expression and sort by the
+#        value of the expression.
+# 
+# For a compound SELECT the rules are modified slightly.
+# In the third rule, the expression must exactly match one
+# of the result columns.  The sequences of three rules is
+# attempted first on the left-most SELECT.  If that doesn't
+# work, we move to the right, one by one.
+#
+# Rule (3) is not in standard SQL - it is an SQLite extension,
+# though one copied from PostgreSQL.  The rule for compound
+# queries where a search is made of SELECTs to the right
+# if the left-most SELECT does not match is not a part of
+# standard SQL either.  This extension is unique to SQLite
+# as far as we know.
+#
+# Rule (2) was added by the changes ticket #2822.  Prior to
+# that changes, SQLite did not support rule (2), making it
+# technically in violation of standard SQL semantics.  
+# No body noticed because rule (3) has the same effect as
+# rule (2) except in some obscure cases.
+#
+
+
+# Test plan:
+#
+#   tkt2822-1.* - Simple identifier as ORDER BY expression.
+#   tkt2822-2.* - More complex ORDER BY expressions.
+
+do_test tkt2822-0.1 {
+  execsql {
+    CREATE TABLE t1(a, b, c);
+    CREATE TABLE t2(a, b, c);
+
+    INSERT INTO t1 VALUES(1, 3, 9);
+    INSERT INTO t1 VALUES(3, 9, 27);
+    INSERT INTO t1 VALUES(5, 15, 45);
+
+    INSERT INTO t2 VALUES(2, 6, 18);
+    INSERT INTO t2 VALUES(4, 12, 36);
+    INSERT INTO t2 VALUES(6, 18, 54);
+  }
+} {}
+
+# Test the "ORDER BY <integer>" syntax.
+#
+do_test tkt2822-1.1 {
+  execsql {
+    SELECT a, b, c FROM t1 UNION ALL SELECT a, b, c FROM t2 ORDER BY 1;
+  }
+} {1 3 9 2 6 18 3 9 27 4 12 36 5 15 45 6 18 54}
+do_test tkt2822-1.2 {
+  execsql {
+    SELECT a, CAST (b AS TEXT), c FROM t1 
+      UNION ALL 
+    SELECT a, b, c FROM t2 
+      ORDER BY 2;
+  }
+} {2 6 18 4 12 36 6 18 54 5 15 45 1 3 9 3 9 27}
+
+# Test the "ORDER BY <identifier>" syntax.
+#
+do_test tkt2822-2.1 {
+  execsql {
+    SELECT a, b, c FROM t1 UNION ALL SELECT a, b, c FROM t2 ORDER BY a;
+  }
+} {1 3 9 2 6 18 3 9 27 4 12 36 5 15 45 6 18 54}
+
+do_test tkt2822-2.2 {
+  execsql {
+    SELECT a, CAST (b AS TEXT) AS x, c FROM t1 
+      UNION ALL 
+    SELECT a, b, c FROM t2 
+      ORDER BY x;
+  }
+} {2 6 18 4 12 36 6 18 54 5 15 45 1 3 9 3 9 27}
+do_test tkt2822-2.3 {
+  execsql {
+    SELECT t1.a, b, c FROM t1 UNION ALL SELECT t2.a, b, c FROM t2 ORDER BY a;
+  }
+} {1 3 9 2 6 18 3 9 27 4 12 36 5 15 45 6 18 54}
+
+# Test the "ORDER BY <expression>" syntax.
+#
+do_test tkt2822-3.1 {
+  execsql {
+    SELECT a, CAST (b AS TEXT) AS x, c FROM t1 
+      UNION ALL 
+    SELECT a, b, c FROM t2 
+      ORDER BY CAST (b AS TEXT);
+  }
+} {2 6 18 4 12 36 6 18 54 5 15 45 1 3 9 3 9 27}
+do_test tkt2822-3.2 {
+  execsql {
+    SELECT t1.a, b, c FROM t1 UNION ALL SELECT t2.a, b, c FROM t2 ORDER BY t1.a;
+  }
+} {1 3 9 2 6 18 3 9 27 4 12 36 5 15 45 6 18 54}
+
+# Test that if a match cannot be found in the leftmost SELECT, an
+# attempt is made to find a match in subsequent SELECT statements.
+#
+do_test tkt2822-3.3 {
+  execsql {
+    SELECT a, b, c FROM t1 UNION ALL SELECT a AS x, b, c FROM t2 ORDER BY x;
+  }
+} {1 3 9 2 6 18 3 9 27 4 12 36 5 15 45 6 18 54}
+do_test tkt2822-3.4 {
+  # But the leftmost SELECT takes precedence.
+  execsql {
+    SELECT a AS b, CAST (b AS TEXT) AS a, c FROM t1 
+      UNION ALL 
+    SELECT a, b, c FROM t2 
+      ORDER BY a;
+  }
+} {2 6 18 4 12 36 6 18 54 5 15 45 1 3 9 3 9 27}
+do_test tkt2822-3.5 {
+  execsql {
+    SELECT a, b, c FROM t2 
+      UNION ALL 
+    SELECT a AS b, CAST (b AS TEXT) AS a, c FROM t1 
+      ORDER BY a;
+  }
+} {1 3 9 2 6 18 3 9 27 4 12 36 5 15 45 6 18 54}
+
+# Test some error conditions (ORDER BY clauses that match no column).
+#
+do_test tkt2822-4.1 {
+  catchsql {
+    SELECT a, b, c FROM t1 UNION ALL SELECT a, b, c FROM t2 ORDER BY x
+  }
+} {1 {1st ORDER BY term does not match any column in the result set}}
+do_test tkt2822-4.2 {
+  catchsql {
+    SELECT a, CAST (b AS TEXT) AS x, c FROM t1 
+      UNION ALL 
+    SELECT a, b, c FROM t2 
+      ORDER BY CAST (b AS INTEGER);
+  }
+} {1 {1st ORDER BY term does not match any column in the result set}}
+
+# Tests for rule (2).
+#
+# The "ORDER BY b" should match the column alias (rule 2), not the
+# the t3.b value (rule 3).  
+#
+do_test tkt2822-5.1 {
+  execsql {
+    CREATE TABLE t3(a,b);
+    INSERT INTO t3 VALUES(1,8);
+    INSERT INTO t3 VALUES(9,2);
+
+    SELECT a AS b FROM t3 ORDER BY b;
+  }
+} {1 9}
+do_test tkt2822-5.2 {
+  # Case does not matter.  b should match B
+  execsql {
+    SELECT a AS b FROM t3 ORDER BY B;
+  }
+} {1 9}
+do_test tkt2822-5.3 {
+  # Quoting should not matter
+  execsql {
+    SELECT a AS 'b' FROM t3 ORDER BY "B";
+  }
+} {1 9}
+do_test tkt2822-5.4 {
+  # Quoting should not matter
+  execsql {
+    SELECT a AS "b" FROM t3 ORDER BY [B];
+  }
+} {1 9}
+
+# In "ORDER BY +b" the term is now an expression rather than
+# a label.  It therefore matches by rule (3) instead of rule (2).
+# 
+do_test tkt2822-5.5 {
+  execsql {
+    SELECT a AS b FROM t3 ORDER BY +b;
+  }
+} {9 1}
+
+# Tests for rule 2 in compound queries
+#
+do_test tkt2822-6.1 {
+  execsql {
+    CREATE TABLE t6a(p,q);
+    INSERT INTO t6a VALUES(1,8);
+    INSERT INTO t6a VALUES(9,2);
+    CREATE TABLE t6b(x,y);
+    INSERT INTO t6b VALUES(1,7);
+    INSERT INTO t6b VALUES(7,2);
+
+    SELECT p, q FROM t6a UNION ALL SELECT x, y FROM t6b ORDER BY 1, 2
+  }
+} {1 7 1 8 7 2 9 2}
+do_test tkt2822-6.2 {
+  execsql {
+    SELECT p PX, q QX FROM t6a UNION ALL SELECT x XX, y YX FROM t6b
+    ORDER BY PX, YX
+  }
+} {1 7 1 8 7 2 9 2}
+do_test tkt2822-6.3 {
+  execsql {
+    SELECT p PX, q QX FROM t6a UNION ALL SELECT x XX, y YX FROM t6b
+    ORDER BY XX, QX
+  }
+} {1 7 1 8 7 2 9 2}
+do_test tkt2822-6.4 {
+  execsql {
+    SELECT p PX, q QX FROM t6a UNION ALL SELECT x XX, y YX FROM t6b
+    ORDER BY QX, XX
+  }
+} {7 2 9 2 1 7 1 8}
+do_test tkt2822-6.5 {
+  execsql {
+    SELECT p PX, q QX FROM t6a UNION ALL SELECT x XX, y YX FROM t6b
+    ORDER BY t6b.x, QX
+  }
+} {1 7 1 8 7 2 9 2}
+do_test tkt2822-6.6 {
+  execsql {
+    SELECT p PX, q QX FROM t6a UNION ALL SELECT x XX, y YX FROM t6b
+    ORDER BY t6a.q, XX
+  }
+} {7 2 9 2 1 7 1 8}
+
+# More error message tests.  This is really more of a test of the
+# %r ordinal value formatting capablity added to sqlite3_snprintf()
+# by ticket #2822.
+#
+do_test tkt2822-7.1 {
+  execsql {
+    CREATE TABLE t7(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,
+                    a15,a16,a17,a18,a19,a20,a21,a22,a23,a24,a25);
+  }
+  catchsql {
+    SELECT * FROM t7 ORDER BY 0;
+  }
+} {1 {1st ORDER BY term out of range - should be between 1 and 25}}
+do_test tkt2822-7.2 {
+  catchsql {
+    SELECT * FROM t7 ORDER BY 1, 0;
+  }
+} {1 {2nd ORDER BY term out of range - should be between 1 and 25}}
+do_test tkt2822-7.3 {
+  catchsql {
+    SELECT * FROM t7 ORDER BY 1, 2, 0;
+  }
+} {1 {3rd ORDER BY term out of range - should be between 1 and 25}}
+do_test tkt2822-7.4 {
+  catchsql {
+    SELECT * FROM t7 ORDER BY 1, 2, 3, 0;
+  }
+} {1 {4th ORDER BY term out of range - should be between 1 and 25}}
+do_test tkt2822-7.9 {
+  catchsql {
+    SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 0;
+  }
+} {1 {9th ORDER BY term out of range - should be between 1 and 25}}
+do_test tkt2822-7.10 {
+  catchsql {
+    SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 9, 0;
+  }
+} {1 {10th ORDER BY term out of range - should be between 1 and 25}}
+do_test tkt2822-7.11 {
+  catchsql {
+    SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 0;
+  }
+} {1 {11th ORDER BY term out of range - should be between 1 and 25}}
+do_test tkt2822-7.12 {
+  catchsql {
+    SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 0;
+  }
+} {1 {12th ORDER BY term out of range - should be between 1 and 25}}
+do_test tkt2822-7.13 {
+  catchsql {
+    SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 0;
+  }
+} {1 {13th ORDER BY term out of range - should be between 1 and 25}}
+do_test tkt2822-7.20 {
+  catchsql {
+    SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
+                             11,12,13,14,15,16,17,18,19, 0
+  }
+} {1 {20th ORDER BY term out of range - should be between 1 and 25}}
+do_test tkt2822-7.21 {
+  catchsql {
+    SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
+                             11,12,13,14,15,16,17,18,19, 20, 0
+  }
+} {1 {21st ORDER BY term out of range - should be between 1 and 25}}
+do_test tkt2822-7.22 {
+  catchsql {
+    SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
+                             11,12,13,14,15,16,17,18,19, 20, 21, 0
+  }
+} {1 {22nd ORDER BY term out of range - should be between 1 and 25}}
+
+
+finish_test