Module: ActiveRecord::ConnectionAdapters::DatabaseLimits

Defined in:

activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb

Instance Method Summary (collapse)

• - (Object) column_name_length

  Returns the maximum length of a column name.

• - (Object) columns_per_multicolumn_index

  Returns the maximum number of columns in a multicolumn index.

• - (Object) columns_per_table

  Returns the maximum number of columns per table.

• - (Object) in_clause_length

  Returns the maximum number of elements in an IN (x,y,z) clause.

• - (Object) index_name_length

  Returns the maximum length of an index name.

• - (Object) indexes_per_table

  Returns the maximum number of indexes per table.

• - (Object) joins_per_query

  Returns maximum number of joins in a single query.

• - (Object) sql_query_length

  Returns the maximum length of an SQL query.

• - (Object) table_alias_length

  Returns the maximum length of a table alias.

• - (Object) table_name_length

  Returns the maximum length of a table name.

11
12
13

# File 'activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb', line 11

def column_name_length
  64
end

36
37
38

# File 'activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb', line 36

def columns_per_multicolumn_index
  16
end

26
27
28

# File 'activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb', line 26

def columns_per_table
  1024
end

42
43
44

# File 'activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb', line 42

def in_clause_length
  nil
end

21
22
23

# File 'activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb', line 21

def index_name_length
  64
end

31
32
33

# File 'activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb', line 31

def indexes_per_table
  16
end

52
53
54

# File 'activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb', line 52

def joins_per_query
  256
end

47
48
49

# File 'activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb', line 47

def sql_query_length
  1048575
end

6
7
8

# File 'activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb', line 6

def table_alias_length
  255
end

16
17
18

# File 'activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb', line 16

def table_name_length
  64
end