29 lines
892 B
MySQL
29 lines
892 B
MySQL
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WITH RECURSIVE
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input(sud) AS (
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VALUES('53..7....6..195....98....6.8...6...34..8.3..17...2...6.6....28....419..5....8..79')
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),
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digits(z, lp) AS (
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VALUES('1', 1)
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UNION ALL SELECT
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CAST(lp+1 AS TEXT), lp+1 FROM digits WHERE lp<9
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),
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x(s, ind) AS (
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SELECT sud, instr(sud, '.') FROM input
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UNION ALL
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SELECT
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substr(s, 1, ind-1) || z || substr(s, ind+1),
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instr( substr(s, 1, ind-1) || z || substr(s, ind+1), '.' )
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FROM x, digits AS z
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WHERE ind>0
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AND NOT EXISTS (
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SELECT 1
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FROM digits AS lp
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WHERE z.z = substr(s, ((ind-1)/9)*9 + lp, 1)
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OR z.z = substr(s, ((ind-1)%9) + (lp-1)*9 + 1, 1)
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OR z.z = substr(s, (((ind-1)/3) % 3) * 3
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+ ((ind-1)/27) * 27 + lp
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+ ((lp-1) / 3) * 6, 1)
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)
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)
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SELECT s FROM x WHERE ind=0;
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