- 19 3月, 2019 1 次提交
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由 Jeremy Evans 提交于
roflscaling (using frozen string constants instead of literal strings) was added in 2012, before frozen string literals were added in Ruby 2.3. Now that Rails no longer supports Ruby <2.3, and all of these files use frozen string literals, there is no reason to keep the roflscaling. This does not delete or deprecate the related constants. Such a change can be made in a later commit.
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- 16 3月, 2019 1 次提交
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由 Ryuta Kamizono 提交于
We as Arm Treasure Data are using Optimizer Hints with a monkey patch (https://gist.github.com/kamipo/4c8539f0ce4acf85075cf5a6b0d9712e), especially in order to use `MAX_EXECUTION_TIME` (refer #31129). Example: ```ruby class Job < ApplicationRecord default_scope { optimizer_hints("MAX_EXECUTION_TIME(50000) NO_INDEX_MERGE(jobs)") } end ``` Optimizer Hints is supported not only for MySQL but also for most databases (PostgreSQL on RDS, Oracle, SQL Server, etc), it is really helpful to turn heavy queries for large scale applications.
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- 16 11月, 2018 1 次提交
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由 Dmytro Shteflyuk 提交于
* Arel: Implemented DB-aware NULL-safe comparison * Fixed where clause inversion for NULL-safe comparison * Renaming "null_safe_eq" to "is_not_distinct_from", "null_safe_not_eq" to "is_distinct_from" [Dmytro Shteflyuk + Rafael Mendonça França]
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- 25 9月, 2018 1 次提交
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由 Vladimir Kochnev 提交于
Initially, `TOP` was introduced to support `limit` for MSSQL database. Unlike PostgreSQL/MySQL/SQLite, MSSQL does not have native `LIMIT`/`OFFSET` support. The commit adding `TOP` is 1a246f71. However, it figured out that `TOP` implementation was weak and it's not sufficient to also support `OFFSET`, then `TOP` was substituted with `ROW_NUMBER()` subquery in be48ed30. This is a well known trick in MSSQL - https://stackoverflow.com/questions/2135418/equivalent-of-limit-and-offset-for-sql-server. So now we don't need this `visit_Arel_Nodes_Top` at all. It does nothing useful but also adds an extra space after `SELECT` when `LIMIT` is being used for **any** database.
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- 24 2月, 2018 2 次提交
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由 Matthew Draper 提交于
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由 Matthew Draper 提交于
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