Use official database name [ci skip]

* s/Postgres/PostgreSQL/
* s/MYSQL/MySQL/, s/Mysql/MySQL/
* s/Sqlite/SQLite/

Replaced all newly added them after 6089b31.

5 files changed, 9 insertions, 9 deletions

diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md
index a191f50da7..b8ddb0cf76 100644
--- a/activerecord/CHANGELOG.md
+++ b/activerecord/CHANGELOG.md
@@ -79,7 +79,7 @@
     bulk deletes by `delete_all`.
 
     Supports skipping or upserting duplicates through the `ON CONFLICT` syntax
-    for Postgres (9.5+) and Sqlite (3.24+) and `ON DUPLICATE KEY UPDATE` syntax
+    for PostgreSQL (9.5+) and SQLite (3.24+) and `ON DUPLICATE KEY UPDATE` syntax
     for MySQL.
 
     *Bob Lail*
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb
index 6981ea6ecd..9f0335b31d 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb
@@ -966,7 +966,7 @@ module ActiveRecord
       # [<tt>:on_update</tt>]
       #   Action that happens <tt>ON UPDATE</tt>. Valid values are +:nullify+, +:cascade+ and +:restrict+
       # [<tt>:validate</tt>]
-      #   (Postgres only) Specify whether or not the constraint should be validated. Defaults to +true+.
+      #   (PostgreSQL only) Specify whether or not the constraint should be validated. Defaults to +true+.
       def add_foreign_key(from_table, to_table, options = {})
         return unless supports_foreign_keys?
 
diff --git a/activerecord/lib/active_record/integration.rb b/activerecord/lib/active_record/integration.rb
index fa6f0d36ec..67a63cd2d1 100644
--- a/activerecord/lib/active_record/integration.rb
+++ b/activerecord/lib/active_record/integration.rb
@@ -180,7 +180,7 @@ module ActiveRecord
       #   raw_timestamp_to_cache_version(timestamp)
       #   # => "20181015200215266505"
       #
-      # Postgres truncates trailing zeros,
+      # PostgreSQL truncates trailing zeros,
       # https://github.com/postgres/postgres/commit/3e1beda2cde3495f41290e1ece5d544525810214
       # to account for this we pad the output with zeros
       def raw_timestamp_to_cache_version(timestamp)
diff --git a/activerecord/lib/active_record/persistence.rb b/activerecord/lib/active_record/persistence.rb
index 4ef0c1b6a6..a87b9e7db2 100644
--- a/activerecord/lib/active_record/persistence.rb
+++ b/activerecord/lib/active_record/persistence.rb
@@ -85,14 +85,14 @@ module ActiveRecord
       # ==== Options
       #
       # [:returning]
-      #   (Postgres-only) An array of attributes to return for all successfully
+      #   (PostgreSQL only) An array of attributes to return for all successfully
       #   inserted records, which by default is the primary key.
       #   Pass <tt>returning: %w[ id name ]</tt> for both id and name
       #   or <tt>returning: false</tt> to omit the underlying <tt>RETURNING</tt> SQL
       #   clause entirely.
       #
       # [:unique_by]
-      #   (Postgres and SQLite only) By default rows are considered to be unique
+      #   (PostgreSQL and SQLite only) By default rows are considered to be unique
       #   by every unique index on the table. Any duplicate rows are skipped.
       #
       #   To skip rows according to just one unique index pass <tt>:unique_by</tt>.
@@ -154,7 +154,7 @@ module ActiveRecord
       # ==== Options
       #
       # [:returning]
-      #   (Postgres-only) An array of attributes to return for all successfully
+      #   (PostgreSQL only) An array of attributes to return for all successfully
       #   inserted records, which by default is the primary key.
       #   Pass <tt>returning: %w[ id name ]</tt> for both id and name
       #   or <tt>returning: false</tt> to omit the underlying <tt>RETURNING</tt> SQL
@@ -202,14 +202,14 @@ module ActiveRecord
       # ==== Options
       #
       # [:returning]
-      #   (Postgres-only) An array of attributes to return for all successfully
+      #   (PostgreSQL only) An array of attributes to return for all successfully
       #   inserted records, which by default is the primary key.
       #   Pass <tt>returning: %w[ id name ]</tt> for both id and name
       #   or <tt>returning: false</tt> to omit the underlying <tt>RETURNING</tt> SQL
       #   clause entirely.
       #
       # [:unique_by]
-      #   (Postgres and SQLite only) By default rows are considered to be unique
+      #   (PostgreSQL and SQLite only) By default rows are considered to be unique
       #   by every unique index on the table. Any duplicate rows are skipped.
       #
       #   To skip rows according to just one unique index pass <tt>:unique_by</tt>.
diff --git a/activerecord/test/cases/adapters/mysql2/schema_test.rb b/activerecord/test/cases/adapters/mysql2/schema_test.rb
index 1283b0642c..b8f51acba0 100644
--- a/activerecord/test/cases/adapters/mysql2/schema_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/schema_test.rb
@@ -41,7 +41,7 @@ module ActiveRecord
         column_24 = @connection.columns(:mysql_doubles).find { |c| c.name == "float_24" }
         column_25 = @connection.columns(:mysql_doubles).find { |c| c.name == "float_25" }
 
-        # Mysql floats are precision 0..24, Mysql doubles are precision 25..53
+        # MySQL floats are precision 0..24, MySQL doubles are precision 25..53
         assert_equal 24, column_no_limit.limit
         assert_equal 24, column_short.limit
         assert_equal 53, column_long.limit