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Another fix in the IN-operator algorithm description.

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FossilOrigin-Name: f474aeac4fa62d87e73189868d7c7a295ffb7265
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drh 2016-08-25 17:47:36 +00:00
parent 1373c3a8c5
commit 0a1082aec2
3 changed files with 13 additions and 13 deletions
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@ -1,5 +1,5 @@
C Further\srefinement\sof\sthe\sin-operator.md\sdocumentation. C Another\sfix\sin\sthe\sIN-operator\salgorithm\sdescription.
D 2016-08-25T17:40:32.626 D 2016-08-25T17:47:36.711
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@ -346,7 +346,7 @@ F src/global.c c45ea22aff29334f6a9ec549235ac3357c970015
F src/hash.c 55b5fb474100cee0b901edaf203e26c970940f36 F src/hash.c 55b5fb474100cee0b901edaf203e26c970940f36
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src/in-operator.md
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@ -77,15 +77,15 @@ is the algorithm that is implemented in SQLite.
driving a loop, then skip this step entirely. driving a loop, then skip this step entirely.
2. Check the LHS to see if it is a partial-NULL and if it is, jump 2. Check the LHS to see if it is a partial-NULL and if it is, jump
ahead to step 4. ahead to step 5.
3. Do a binary search for the RHS using the LHS as a probe. If 3. Do a binary search of the RHS using the LHS as a probe. If
an exact match is found, return TRUE. an exact match is found, return TRUE.
4. If we do not need to distingish between FALSE and NULL, 4. If the RHS is non-NULL then return FALSE.
then return FALSE.
5. If the RHS is non-NULL then return FALSE. 5. If we do not need to distingish between FALSE and NULL,
then return FALSE.
6. For each row in the RHS, compare that row against the LHS and 6. For each row in the RHS, compare that row against the LHS and
if the result is NULL, immediately return NULL. In the case if the result is NULL, immediately return NULL. In the case