From: Konstantin Osipov <kostja@tarantool.org> To: tarantool-patches@freelists.org Cc: Georgy Kirichenko <georgy@tarantool.org> Subject: [tarantool-patches] Re: [PATCH 3/6] sql: pass true types of columns to Tarantool Date: Wed, 19 Sep 2018 05:23:35 +0300 [thread overview] Message-ID: <20180919022335.GB2386@chai> (raw) In-Reply-To: <9a94105515bd4f9148f302b24230d0918cfccdf9.1537216078.git.korablev@tarantool.org> * Nikita Pettik <korablev@tarantool.org> [18/09/18 01:20]: > From: Georgy Kirichenko <georgy@tarantool.org> > > As a main part of introducing strict typing in SQL it is required to > prohibit typeless columns in parser's grammar. Originally, SQLite simply > assigns typeless columns to BLOB affinity. Moreover, due to historical > reasons, all columns were stored with <SCALAR> type in Tarantool core > (except for <INTEGER> when it comes to primary key). Column type should > be defined on table creation. Allowed data types are: <TEXT>, <VARCHAR>, > <CHAR>, <BLOB>, <INT[EGER]>, <REAL>, <FLOAT>, <NUMERIC>, <DECIMAL>, > <DOUBLE> <DATE> and <DATETIME>. However, still any declared data type is > converted to one of <BLOB>, <TEXT>, <REAL> or <INTEGER> affinities. > While affinity reaches space format, it is (again) converted to > Tarantool's field type. To be more precise, table of conversions: > > +----------+----------+------------+ > | SQL TYPE | AFFINITY | FIELD TYPE | > +----------+----------+------------+ > | FLOAT | REAL | NUMBER | > | REAL | REAL | NUMBER | > | DOUBLE | REAL | NUMBER | > | NUMERIC | REAL | NUMBER | > | DECIMAL | REAL | NUMBER | > | INTEGER | INTEGER | INTEGER | > | TEXT | TEXT | STRING | > | VARCHAR | TEXT | STRING | > | CHAR | TEXT | STRING | > | BLOB | BLOB | SCALAR | > | DATETIME | REAL | NUMBER | > | DATE | REAL | NUMBER | > | TIME | REAL | NUMBER | > +----------+----------+------------+ How do you manage to store datetime/date/time values as numbers? What is your conversion procedure? Are you storing it as unix timestamp? Note that SQL date begins (AFAIR) at 1900-01-01. > -- Konstantin Osipov, Moscow, Russia, +7 903 626 22 32 http://tarantool.io - www.twitter.com/kostja_osipov
next prev parent reply other threads:[~2018-09-19 2:23 UTC|newest] Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-09-17 20:32 [tarantool-patches] [PATCH 0/6] Introduce strict typing for SQL Nikita Pettik 2018-09-17 20:32 ` [tarantool-patches] [PATCH 1/6] sql: split conflict action and affinity for Expr Nikita Pettik 2018-09-19 2:16 ` [tarantool-patches] " Konstantin Osipov 2018-09-27 20:24 ` Vladislav Shpilevoy 2018-10-12 11:18 ` n.pettik 2018-09-17 20:32 ` [tarantool-patches] [PATCH 2/6] sql: annotate SQL functions with return type Nikita Pettik 2018-09-27 20:23 ` [tarantool-patches] " Vladislav Shpilevoy 2018-10-12 11:18 ` n.pettik 2018-09-17 20:32 ` [tarantool-patches] [PATCH 3/6] sql: pass true types of columns to Tarantool Nikita Pettik 2018-09-19 2:23 ` Konstantin Osipov [this message] 2018-10-12 11:19 ` [tarantool-patches] " n.pettik 2018-09-27 20:23 ` Vladislav Shpilevoy 2018-10-12 11:18 ` n.pettik 2018-10-17 21:45 ` Vladislav Shpilevoy 2018-10-23 23:28 ` n.pettik 2018-10-29 21:32 ` Vladislav Shpilevoy 2018-11-02 2:36 ` n.pettik 2018-09-17 20:32 ` [tarantool-patches] [PATCH 4/6] sql: enforce implicit type conversions Nikita Pettik 2018-09-19 2:25 ` [tarantool-patches] " Konstantin Osipov 2018-09-27 20:24 ` Vladislav Shpilevoy 2018-10-12 11:19 ` n.pettik 2018-10-17 21:45 ` Vladislav Shpilevoy 2018-10-23 23:28 ` n.pettik 2018-10-29 21:32 ` Vladislav Shpilevoy 2018-11-02 2:36 ` n.pettik 2018-11-02 11:15 ` Vladislav Shpilevoy 2018-11-02 13:26 ` n.pettik 2018-09-17 20:32 ` [tarantool-patches] [PATCH 5/6] sql: return result-set type via IProto Nikita Pettik 2018-09-19 2:26 ` [tarantool-patches] " Konstantin Osipov 2018-09-27 20:24 ` Vladislav Shpilevoy 2018-10-12 11:19 ` n.pettik 2018-10-17 21:45 ` Vladislav Shpilevoy 2018-10-23 23:28 ` n.pettik 2018-09-17 20:32 ` [tarantool-patches] [PATCH 6/6] sql: discard numeric conversion by unary plus Nikita Pettik 2018-09-27 20:24 ` [tarantool-patches] " Vladislav Shpilevoy 2018-10-12 11:19 ` n.pettik 2018-09-27 20:24 ` [tarantool-patches] Re: [PATCH 0/6] Introduce strict typing for SQL Vladislav Shpilevoy 2018-10-12 11:18 ` n.pettik 2018-11-03 2:41 ` Kirill Yukhin
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20180919022335.GB2386@chai \ --to=kostja@tarantool.org \ --cc=georgy@tarantool.org \ --cc=tarantool-patches@freelists.org \ --subject='[tarantool-patches] Re: [PATCH 3/6] sql: pass true types of columns to Tarantool' \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: link
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox