85 lines
2.3 KiB
Plaintext
85 lines
2.3 KiB
Plaintext
# 2017 January 9
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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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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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set testprefix update2
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db func repeat [list string repeat]
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#-------------------------------------------------------------------------
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# 1.1.* A one-pass UPDATE that does balance() operations on the IPK index
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# that it is scanning.
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#
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# 1.2.* Same again, but with a WITHOUT ROWID table.
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#
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set nrow [expr 10]
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do_execsql_test 1.1.0 {
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CREATE TABLE t1(a INTEGER PRIMARY KEY, b);
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CREATE TABLE t2(a INTEGER PRIMARY KEY, b);
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WITH s(i) AS ( SELECT 0 UNION ALL SELECT i+1 FROM s WHERE i<$nrow )
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INSERT INTO t1(b) SELECT char((i % 26) + 65) FROM s;
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INSERT INTO t2 SELECT * FROM t1;
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}
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do_execsql_test 1.1.1 {
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UPDATE t1 SET b = repeat(b, 100)
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}
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do_execsql_test 1.1.2 {
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SELECT * FROM t1;
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} [db eval { SELECT a, repeat(b, 100) FROM t2 }]
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do_execsql_test 1.2.0 {
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DROP TABLE t1;
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CREATE TABLE t1(a INT PRIMARY KEY, b) WITHOUT ROWID;
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WITH s(i) AS ( SELECT 0 UNION ALL SELECT i+1 FROM s WHERE i<$nrow )
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INSERT INTO t1(a, b) SELECT i+1, char((i % 26) + 65) FROM s;
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}
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#explain_i { UPDATE t1 SET b = repeat(b, 100) }
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do_execsql_test 1.2.1 {
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UPDATE t1 SET b = repeat(b, 100)
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}
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do_execsql_test 1.2.2 {
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SELECT * FROM t1;
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} [db eval { SELECT a, repeat(b, 100) FROM t2 }]
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#-------------------------------------------------------------------------
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# A one-pass UPDATE that does balance() operations on the IPK index
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# that it is scanning.
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#
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do_execsql_test 2.1 {
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CREATE TABLE t3(a PRIMARY KEY, b, c);
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CREATE INDEX t3i ON t3(b);
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} {}
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do_execsql_test 2.2 { UPDATE t3 SET c=1 WHERE b=? } {}
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do_execsql_test 2.3 { UPDATE t3 SET c=1 WHERE rowid=? } {}
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#-------------------------------------------------------------------------
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#
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do_execsql_test 3.0 {
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CREATE TABLE t4(a PRIMARY KEY, b, c) WITHOUT ROWID;
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CREATE INDEX t4c ON t4(c);
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INSERT INTO t4 VALUES(1, 2, 3);
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INSERT INTO t4 VALUES(2, 3, 4);
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}
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do_execsql_test 3.1 {
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UPDATE t4 SET c=c+2 WHERE c>2;
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SELECT a, c FROM t4 ORDER BY a;
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} {1 5 2 6}
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finish_test
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