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
|
module ActiveRecord
module ConnectionAdapters
module MySQL
module SchemaStatements # :nodoc:
private
def schema_creation
MySQL::SchemaCreation.new(self)
end
def create_table_definition(*args)
MySQL::TableDefinition.new(*args)
end
def new_column_from_field(table_name, field)
type_metadata = fetch_type_metadata(field[:Type], field[:Extra])
if type_metadata.type == :datetime && field[:Default] == "CURRENT_TIMESTAMP"
default, default_function = nil, field[:Default]
else
default, default_function = field[:Default], nil
end
MySQL::Column.new(
field[:Field],
default,
type_metadata,
field[:Null] == "YES",
table_name,
default_function,
field[:Collation],
comment: field[:Comment].presence
)
end
def fetch_type_metadata(sql_type, extra = "")
MySQL::TypeMetadata.new(super(sql_type), extra: extra)
end
def extract_foreign_key_action(specifier)
super unless specifier == "RESTRICT"
end
def data_source_sql(name = nil, type: nil)
scope = quoted_scope(name, type: type)
sql = "SELECT table_name FROM information_schema.tables"
sql << " WHERE table_schema = #{scope[:schema]}"
sql << " AND table_name = #{scope[:name]}" if scope[:name]
sql << " AND table_type = #{scope[:type]}" if scope[:type]
sql
end
def quoted_scope(name = nil, type: nil)
schema, name = extract_schema_qualified_name(name)
scope = {}
scope[:schema] = schema ? quote(schema) : "database()"
scope[:name] = quote(name) if name
scope[:type] = quote(type) if type
scope
end
def extract_schema_qualified_name(string)
schema, name = string.to_s.scan(/[^`.\s]+|`[^`]*`/)
schema, name = nil, schema unless name
[schema, name]
end
end
end
end
end
|
