ActiveRecord::ConnectionAdapters::DatabaseLimits

Methods

C

column_name_length,
columns_per_multicolumn_index,
columns_per_table

I

in_clause_length,
index_name_length,
indexes_per_table

J

joins_per_query

S

sql_query_length

T

table_alias_length,
table_name_length

Instance Public methods

column_name_length()

Returns the maximum length of a column name.

Source: show | on GitHub

    # File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 11
11:       def column_name_length
12:         64
13:       end

columns_per_multicolumn_index()

Returns the maximum number of columns in a multicolumn index.

Source: show | on GitHub

    # File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 36
36:       def columns_per_multicolumn_index
37:         16
38:       end

columns_per_table()

Returns the maximum number of columns per table.

Source: show | on GitHub

    # File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 26
26:       def columns_per_table
27:         1024
28:       end

in_clause_length()

Returns the maximum number of elements in an IN (x,y,z) clause. nil means no limit.

Source: show | on GitHub

    # File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 42
42:       def in_clause_length
43:         nil
44:       end

index_name_length()

Returns the maximum length of an index name.

Source: show | on GitHub

    # File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 21
21:       def index_name_length
22:         64
23:       end

indexes_per_table()

Returns the maximum number of indexes per table.

Source: show | on GitHub

    # File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 31
31:       def indexes_per_table
32:         16
33:       end

joins_per_query()

Returns maximum number of joins in a single query.

Source: show | on GitHub

    # File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 52
52:       def joins_per_query
53:         256
54:       end

sql_query_length()

Returns the maximum length of an SQL query.

Source: show | on GitHub

    # File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 47
47:       def sql_query_length
48:         1048575
49:       end

table_alias_length()

Returns the maximum length of a table alias.

Source: show | on GitHub

   # File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 6
6:       def table_alias_length
7:         255
8:       end

table_name_length()

Returns the maximum length of a table name.

Source: show | on GitHub

    # File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 16
16:       def table_name_length
17:         64
18:       end

Module ActiveRecord::ConnectionAdapters::DatabaseLimits