Merge pull request rails#19741 from greysteil/add-note-about-partial-index-support

senny · senny · commit b427c50e4777 · 2015-04-13T09:56:32.000+02:00
Document that partial indexes are only supported by Postgres and SQLite.
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb
@@ -530,6 +530,8 @@ def rename_column(table_name, column_name, new_column_name)
       #
       #   CREATE UNIQUE INDEX index_accounts_on_branch_id_and_party_id ON accounts(branch_id, party_id) WHERE active
       #
+      # Note: Partial indexes are only supported for PostgreSQL and SQLite 3.8.0+.
+      #
       # ====== Creating an index with a specific method
       #
       #   add_index(:developers, :name, using: 'btree')

Original file line number	Diff line number	Diff line change
`@@ -530,6 +530,8 @@ def rename_column(table_name, column_name, new_column_name)`
`530`	`530`	`#`
`531`	`531`	`# CREATE UNIQUE INDEX index_accounts_on_branch_id_and_party_id ON accounts(branch_id, party_id) WHERE active`
`532`	`532`	`#`
	`533`	`+ # Note: Partial indexes are only supported for PostgreSQL and SQLite 3.8.0+.`
	`534`	`+ #`
`533`	`535`	`# ====== Creating an index with a specific method`
`534`	`536`	`#`
`535`	`537`	`# add_index(:developers, :name, using: 'btree')`