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体验新版 GitCode,发现更多精彩内容 >>
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7cc36862
编写于
4月 16, 2019
作者:
G
Guilherme Mansur
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差异文件
Document algorithm: concurrent options for PostgreSQL [ci skip]
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c2fcc6ac
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1
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1 changed file
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+20
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activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb
..._record/connection_adapters/abstract/schema_statements.rb
+20
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未找到文件。
activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb
浏览文件 @
7cc36862
...
...
@@ -770,6 +770,17 @@ def rename_column(table_name, column_name, new_column_name)
# CREATE FULLTEXT INDEX index_developers_on_name ON developers (name) -- MySQL
#
# Note: only supported by MySQL.
#
# ====== Creating an index with a specific algorithm
#
# add_index(:developers, :name, algorithm: :concurrently)
# # CREATE INDEX CONCURRENTLY developers_on_name on developers (name)
#
# Note: only supported by PostgreSQL.
#
# Concurrently adding an index is not supported in a transaction.
#
# For more information see the {"Transactional Migrations" section}[rdoc-ref:Migration].
def
add_index
(
table_name
,
column_name
,
options
=
{})
index_name
,
index_type
,
index_columns
,
index_options
=
add_index_options
(
table_name
,
column_name
,
options
)
execute
"CREATE
#{
index_type
}
INDEX
#{
quote_column_name
(
index_name
)
}
ON
#{
quote_table_name
(
table_name
)
}
(
#{
index_columns
}
)
#{
index_options
}
"
...
...
@@ -793,6 +804,15 @@ def add_index(table_name, column_name, options = {})
#
# remove_index :accounts, name: :by_branch_party
#
# Removes the index named +by_branch_party+ in the +accounts+ table +concurrently+.
#
# remove_index :accounts, name: :by_branch_party, algorithm: :concurrently
#
# Note: only supported by PostgreSQL.
#
# Concurrently removing an index is not supported in a transaction.
#
# For more information see the {"Transactional Migrations" section}[rdoc-ref:Migration].
def
remove_index
(
table_name
,
options
=
{})
index_name
=
index_name_for_remove
(
table_name
,
options
)
execute
"DROP INDEX
#{
quote_column_name
(
index_name
)
}
ON
#{
quote_table_name
(
table_name
)
}
"
...
...
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