74 lines
2.2 KiB
Plaintext
74 lines
2.2 KiB
Plaintext
# 2014-08-20
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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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#
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# This file implements tests of the "skip-scan" query strategy.
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# In particular, this file looks at skipping intermediate terms
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# in an index. For example, if (a,b,c) are indexed, and we have
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# "WHERE a=?1 AND c=?2" - verify that skip-scan can still be used.
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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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do_execsql_test skipscan3-1.1 {
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CREATE TABLE t1(a,b,c,d,PRIMARY KEY(a,b,c));
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WITH RECURSIVE
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c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<1000)
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INSERT INTO t1(a,b,c,d)
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SELECT 1, 1, x, printf('x%04d',x) FROM c;
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ANALYZE;
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} {}
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# This version has long used skip-scan because of the "+a"
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#
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do_execsql_test skipscan3-1.2eqp {
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EXPLAIN QUERY PLAN SELECT d FROM t1 WHERE +a=1 AND c=32;
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} {/*ANY(a) AND ANY(b)*/}
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do_execsql_test skipscan3-1.2 {
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SELECT d FROM t1 WHERE +a=1 AND c=32;
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} {x0032}
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# This version (with "a" instead of "+a") should use skip-scan but
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# did not prior to changes implemented on 2014-08-20
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#
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do_execsql_test skipscan3-1.3eqp {
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EXPLAIN QUERY PLAN SELECT d FROM t1 WHERE a=1 AND c=32;
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} {/*ANY(a) AND ANY(b)*/}
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do_execsql_test skipscan3-1.3 {
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SELECT d FROM t1 WHERE a=1 AND c=32;
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} {x0032}
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# Repeat the test on a WITHOUT ROWID table
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#
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do_execsql_test skipscan3-2.1 {
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CREATE TABLE t2(a,b,c,d,PRIMARY KEY(a,b,c)) WITHOUT ROWID;
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WITH RECURSIVE
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c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<1000)
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INSERT INTO t2(a,b,c,d)
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SELECT 1, 1, x, printf('x%04d',x) FROM c;
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ANALYZE;
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} {}
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do_execsql_test skipscan3-2.2eqp {
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EXPLAIN QUERY PLAN SELECT d FROM t2 WHERE +a=1 AND c=32;
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} {/*ANY(a) AND ANY(b)*/}
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do_execsql_test skipscan3-2.2 {
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SELECT d FROM t2 WHERE +a=1 AND c=32;
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} {x0032}
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do_execsql_test skipscan3-2.3eqp {
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EXPLAIN QUERY PLAN SELECT d FROM t2 WHERE a=1 AND c=32;
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} {/*ANY(a) AND ANY(b)*/}
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do_execsql_test skipscan3-2.3 {
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SELECT d FROM t2 WHERE a=1 AND c=32;
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} {x0032}
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finish_test
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