derek.holloway
7502bf64a4
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49 lines
1.7 KiB
Plaintext
49 lines
1.7 KiB
Plaintext
# 2024-05-24
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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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# Verify that the stmtrand() extension function works.
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#
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# Stmtrand() is a pseudo-random number generator designed for testing.
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# it has the property that it returns the same sequence of pseudo-random
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# numbers for each SQL statement invocation. This makes it suitable for
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# testing because the results are reproducible.
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#
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# The optional argument is the seed for the PRNG. The seed is only used
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# on the first invocation. If the argument is omitted, a seed of 0 is
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# 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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set testprefix stmtrand
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load_static_extension db stmtrand
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do_execsql_test 1.1 {
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WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<30)
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SELECT stmtrand()%10 FROM c
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} {4 1 8 3 6 1 4 9 2 1 2 1 0 1 8 1 4 7 6 1 8 7 0 3 0 9 4 5 9 9}
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do_execsql_test 1.2 {
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WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<30)
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SELECT stmtrand(0)%10 FROM c
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} {4 1 8 3 6 1 4 9 2 1 2 1 0 1 8 1 4 7 6 1 8 7 0 3 0 9 4 5 9 9}
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do_execsql_test 1.3 {
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WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<30)
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SELECT stmtrand(1)%10 FROM c
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} {3 8 9 4 7 2 3 8 5 2 7 0 3 0 7 2 5 6 1 8 5 6 7 8 7 2 9 6 8 0}
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do_execsql_test 1.4 {
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WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<30)
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SELECT stmtrand(x)%10 FROM c
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} {3 8 9 4 7 2 3 8 5 2 7 0 3 0 7 2 5 6 1 8 5 6 7 8 7 2 9 6 8 0}
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finish_test
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