blob: 75e959045e04c89d9404a7bf52d4d27f8e80d2c1 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
# frozen_string_literal: true
require "active_support/deprecation"
module ActiveRecord
module ConnectionAdapters # :nodoc:
module DatabaseLimits
def max_identifier_length # :nodoc:
64
end
# Returns the maximum length of a table alias.
def table_alias_length
max_identifier_length
end
# Returns the maximum length of a column name.
def column_name_length
max_identifier_length
end
deprecate :column_name_length
# Returns the maximum length of a table name.
def table_name_length
max_identifier_length
end
deprecate :table_name_length
# Returns the maximum allowed length for an index name. This
# limit is enforced by \Rails and is less than or equal to
# #index_name_length. The gap between
# #index_name_length is to allow internal \Rails
# operations to use prefixes in temporary operations.
def allowed_index_name_length
index_name_length
end
# Returns the maximum length of an index name.
def index_name_length
max_identifier_length
end
# Returns the maximum number of columns per table.
def columns_per_table
1024
end
deprecate :columns_per_table
# Returns the maximum number of indexes per table.
def indexes_per_table
16
end
deprecate :indexes_per_table
# Returns the maximum number of columns in a multicolumn index.
def columns_per_multicolumn_index
16
end
deprecate :columns_per_multicolumn_index
# Returns the maximum number of elements in an IN (x,y,z) clause.
# +nil+ means no limit.
def in_clause_length
nil
end
# Returns the maximum length of an SQL query.
def sql_query_length
1048575
end
deprecate :sql_query_length
# Returns maximum number of joins in a single query.
def joins_per_query
256
end
deprecate :joins_per_query
private
def bind_params_length
65535
end
end
end
end
|
