paired mutators - srfi-225-egg - SRFI-225 for Chicken

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author	John Cowan	2021-07-26 18:46:38 -0400
committer	Arthur A. Gleckler	2021-07-26 16:10:31 -0700
commit	4bf584b5e234248ee4089bfcf8e4c8059a75ba79 (patch)
tree	0c3c08e3d7c1970b7d60fe2f0ff2d6d555c0ead7 /Dockerfile
parent	exceptions (diff)

paired mutators

Diffstat (limited to 'Dockerfile')

0 files changed, 0 insertions, 0 deletions

vatar/6efbd5bcc7f355e2bb23bd8e26e1d83b?s=13&d=retro' width='13' height='13' alt='Gravatar' /> Peter McGoron 1-15/+1 2021-07-27queryparse: fix NOT

Peter McGoron 1-7/+8 NOT queries are now two-step: the list is queries and then all elements in the cards table that are also in the query are discarded. 2021-07-26add command line option for search

Peter McGoron 2-12/+28 As of right now NOT queries do not work correctly for cards with more than one tag. 2021-07-26natargs: add missing import

Peter McGoron 1-0/+2 2021-07-26queryparse: remove literal set

Peter McGoron 2-17/+14 2021-07-26queryparse: add function to build SQL queries

Peter McGoron 2-1/+73 SQLite allows for UNIONs and INTERSECTIONs between SELECT statements, but it does not support grouping them. By recursively applying DeMorgan's laws, the parser can reduce the parse tree to only * Literals * NOT literals (i.e. "all items not belonging to this tag") * ANDs * ORs What SQLite /can/ do is have SELECT statements come from other SELECT statements. A query like (X & Y & Z) | (A & B & C) in pseudo-SQLite becomes SELECT * FROM ( SELECT * FROM tbl WHERE name IN X INTERSECTION SELECT * FROM tbl WHERE name IN Y INTERSECTION SELECT * FROM tbl WHERE name IN Z ) UNION SELECT * FROM ( SELECT * FROM tbl WHERE name IN A INTERSECTION SELECT * FROM tbl WHERE name IN B INTERSECTION SELECT * FROM tbl WHERE name IN C ) One future optimization would be to group all literals at a certain level with each other, so that there are less direct queries to the entire tag table. 2021-07-26queryparse: use demorgan's laws to simplify parsed expression

Peter McGoron 2-1/+17 2021-07-26update README.md

Peter McGoron 1-0/+10 2021-07-26queryparse: collect literals into set and return it

Peter McGoron 2-16/+22 2021-07-26gitea wants .md suffixes for web rendering

Peter McGoron 2-0/+0 2021-07-26example/query.md: change to what the code actually implements

Peter McGoron 1-3/+3


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