sqlite/test/skipscan1.test

# 2013-11-13
#
# 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 tests of the "skip-scan" query strategy.
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl

do_execsql_test skipscan1-1.1 {
  CREATE TABLE t1(a TEXT, b INT, c INT, d INT);
  CREATE INDEX t1abc ON t1(a,b,c);
  INSERT INTO t1 VALUES('abc',123,4,5);
  INSERT INTO t1 VALUES('abc',234,5,6);
  INSERT INTO t1 VALUES('abc',234,6,7);
  INSERT INTO t1 VALUES('abc',345,7,8);
  INSERT INTO t1 VALUES('def',567,8,9);
  INSERT INTO t1 VALUES('def',345,9,10);
  INSERT INTO t1 VALUES('bcd',100,6,11);

  /* Fake the sqlite_stat1 table so that the query planner believes
  ** the table contains thousands of rows and that the first few
  ** columns are not selective. */
  ANALYZE;
  DELETE FROM sqlite_stat1;
  INSERT INTO sqlite_stat1 VALUES('t1','t1abc','10000 5000 2000 10');
  ANALYZE sqlite_master;
} {}

# Simple queries that leave the first one or two columns of the
# index unconstrainted.
#
do_execsql_test skipscan1-1.2 {
  SELECT a,b,c,d,'|' FROM t1 WHERE b=345 ORDER BY a;
} {abc 345 7 8 | def 345 9 10 |}
do_execsql_test skipscan1-1.2eqp {
  EXPLAIN QUERY PLAN
  SELECT a,b,c,d,'|' FROM t1 WHERE b=345 ORDER BY a;
} {/* USING INDEX t1abc (ANY(a) AND b=?)*/}
do_execsql_test skipscan1-1.2sort {
  EXPLAIN QUERY PLAN
  SELECT a,b,c,d,'|' FROM t1 WHERE b=345 ORDER BY a;
} {~/*ORDER BY*/}

do_execsql_test skipscan1-1.3 {
  SELECT a,b,c,d,'|' FROM t1 WHERE b=345 ORDER BY a DESC;
} {def 345 9 10 | abc 345 7 8 |}
do_execsql_test skipscan1-1.3eqp {
  EXPLAIN QUERY PLAN
  SELECT a,b,c,d,'|' FROM t1 WHERE b=345 ORDER BY a;
} {/* USING INDEX t1abc (ANY(a) AND b=?)*/}
do_execsql_test skipscan1-1.3sort {
  EXPLAIN QUERY PLAN
  SELECT a,b,c,d,'|' FROM t1 WHERE b=345 ORDER BY a;
} {~/*ORDER BY*/}

do_execsql_test skipscan1-1.4 {
  SELECT a,b,c,d,'|' FROM t1 WHERE c=6 ORDER BY a, b, c;
} {abc 234 6 7 | bcd 100 6 11 |}
do_execsql_test skipscan1-1.4eqp {
  EXPLAIN QUERY PLAN
  SELECT a,b,c,d,'|' FROM t1 WHERE c=6 ORDER BY a, b, c;
} {/* USING INDEX t1abc (ANY(a) AND ANY(b) AND c=?)*/}
do_execsql_test skipscan1-1.4sort {
  EXPLAIN QUERY PLAN
  SELECT a,b,c,d,'|' FROM t1 WHERE c=6 ORDER BY a, b, c;
} {~/*ORDER BY*/}

do_execsql_test skipscan1-1.5 {
  SELECT a,b,c,d,'|' FROM t1 WHERE c IN (6,7) ORDER BY a, b, c;
} {abc 234 6 7 | abc 345 7 8 | bcd 100 6 11 |}
do_execsql_test skipscan1-1.5eqp {
  EXPLAIN QUERY PLAN
  SELECT a,b,c,d,'|' FROM t1 WHERE c IN (6,7) ORDER BY a, b, c;
} {/* USING INDEX t1abc (ANY(a) AND ANY(b) AND c=?)*/}
do_execsql_test skipscan1-1.5sort {
  EXPLAIN QUERY PLAN
  SELECT a,b,c,d,'|' FROM t1 WHERE c IN (6,7) ORDER BY a, b, c;
} {~/*ORDER BY*/}

do_execsql_test skipscan1-1.6 {
  SELECT a,b,c,d,'|' FROM t1 WHERE c BETWEEN 6 AND 7 ORDER BY a, b, c;
} {abc 234 6 7 | abc 345 7 8 | bcd 100 6 11 |}
do_execsql_test skipscan1-1.6eqp {
  EXPLAIN QUERY PLAN
  SELECT a,b,c,d,'|' FROM t1 WHERE c BETWEEN 6 AND 7 ORDER BY a, b, c;
} {/* USING INDEX t1abc (ANY(a) AND ANY(b) AND c>? AND c<?)*/}
do_execsql_test skipscan1-1.6sort {
  EXPLAIN QUERY PLAN
  SELECT a,b,c,d,'|' FROM t1 WHERE c BETWEEN 6 AND 7 ORDER BY a, b, c;
} {~/*ORDER BY*/}

do_execsql_test skipscan1-1.7 {
  SELECT a,b,c,d,'|' FROM t1 WHERE b IN (234, 345) AND c BETWEEN 6 AND 7
   ORDER BY a, b;
} {abc 234 6 7 | abc 345 7 8 |}
do_execsql_test skipscan1-1.7eqp {
  EXPLAIN QUERY PLAN
  SELECT a,b,c,d,'|' FROM t1 WHERE b IN (234, 345) AND c BETWEEN 6 AND 7
   ORDER BY a, b;
} {/* USING INDEX t1abc (ANY(a) AND b=? AND c>? AND c<?)*/}
do_execsql_test skipscan1-1.7sort {
  EXPLAIN QUERY PLAN
  SELECT a,b,c,d,'|' FROM t1 WHERE b IN (234, 345) AND c BETWEEN 6 AND 7
   ORDER BY a, b;
} {~/*ORDER BY*/}


# Joins
#
do_execsql_test skipscan1-1.51 {
  CREATE TABLE t1j(x TEXT, y INTEGER);
  INSERT INTO t1j VALUES('one',1),('six',6),('ninty-nine',99);
  INSERT INTO sqlite_stat1 VALUES('t1j',null,'3');
  ANALYZE sqlite_master;
  SELECT x, a, b, c, d, '|' FROM t1j, t1 WHERE c=y ORDER BY +a;
} {six abc 234 6 7 | six bcd 100 6 11 |}
do_execsql_test skipscan1-1.51eqp {
  EXPLAIN QUERY PLAN
  SELECT x, a, b, c, d, '|' FROM t1j, t1 WHERE c=y ORDER BY +a;
} {/* INDEX t1abc (ANY(a) AND ANY(b) AND c=?)*/}

do_execsql_test skipscan1-1.52 {
  SELECT x, a, b, c, d, '|' FROM t1j LEFT JOIN t1 ON c=y ORDER BY +y, +a;
} {one {} {} {} {} | six abc 234 6 7 | six bcd 100 6 11 | ninty-nine {} {} {} {} |}
do_execsql_test skipscan1-1.52eqp {
  EXPLAIN QUERY PLAN
  SELECT x, a, b, c, d, '|' FROM t1j LEFT JOIN t1 ON c=y ORDER BY +y, +a;
} {/* INDEX t1abc (ANY(a) AND ANY(b) AND c=?)*/}

do_execsql_test skipscan1-2.1 {
  CREATE TABLE t2(a TEXT, b INT, c INT, d INT,
                  PRIMARY KEY(a,b,c));
  INSERT INTO t2 SELECT * FROM t1;

  /* Fake the sqlite_stat1 table so that the query planner believes
  ** the table contains thousands of rows and that the first few
  ** columns are not selective. */
  ANALYZE;
  UPDATE sqlite_stat1 SET stat='10000 5000 2000 10' WHERE idx NOT NULL;
  ANALYZE sqlite_master;
} {}

do_execsql_test skipscan1-2.2 {
  SELECT a,b,c,d,'|' FROM t2 WHERE b=345 ORDER BY a;
} {abc 345 7 8 | def 345 9 10 |}
do_execsql_test skipscan1-2.2eqp {
  EXPLAIN QUERY PLAN
  SELECT a,b,c,d,'|' FROM t2 WHERE b=345 ORDER BY a;
} {/* USING INDEX sqlite_autoindex_t2_1 (ANY(a) AND b=?)*/}
do_execsql_test skipscan1-2.2sort {
  EXPLAIN QUERY PLAN
  SELECT a,b,c,d,'|' FROM t2 WHERE b=345 ORDER BY a;
} {~/*ORDER BY*/}


do_execsql_test skipscan1-3.1 {
  CREATE TABLE t3(a TEXT, b INT, c INT, d INT,
                  PRIMARY KEY(a,b,c)) WITHOUT ROWID;
  INSERT INTO t3 SELECT * FROM t1;

  /* Fake the sqlite_stat1 table so that the query planner believes
  ** the table contains thousands of rows and that the first few
  ** columns are not selective. */
  ANALYZE;
  UPDATE sqlite_stat1 SET stat='10000 5000 2000 10' WHERE idx NOT NULL;
  ANALYZE sqlite_master;
} {}

do_execsql_test skipscan1-3.2 {
  SELECT a,b,c,d,'|' FROM t3 WHERE b=345 ORDER BY a;
} {abc 345 7 8 | def 345 9 10 |}
do_execsql_test skipscan1-3.2eqp {
  EXPLAIN QUERY PLAN
  SELECT a,b,c,d,'|' FROM t3 WHERE b=345 ORDER BY a;
} {/* INDEX sqlite_autoindex_t3_1 (ANY(a) AND b=?)*/}
do_execsql_test skipscan1-3.2sort {
  EXPLAIN QUERY PLAN
  SELECT a,b,c,d,'|' FROM t3 WHERE b=345 ORDER BY a;
} {~/*ORDER BY*/}

finish_test