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module ActiveRecord
module ConnectionAdapters
module SQLite3
module SchemaStatements # :nodoc:
# Returns an array of indexes for the given table.
def indexes(table_name, name = nil)
if name
ActiveSupport::Deprecation.warn(<<-MSG.squish)
Passing name to #indexes is deprecated without replacement.
MSG
end
exec_query("PRAGMA index_list(#{quote_table_name(table_name)})", "SCHEMA").map do |row|
index_sql = select_value(<<-SQL, "SCHEMA")
SELECT sql
FROM sqlite_master
WHERE name = #{quote(row['name'])} AND type = 'index'
UNION ALL
SELECT sql
FROM sqlite_temp_master
WHERE name = #{quote(row['name'])} AND type = 'index'
SQL
/\sWHERE\s+(?<where>.+)$/i =~ index_sql
columns = exec_query("PRAGMA index_info(#{quote(row['name'])})", "SCHEMA").map do |col|
col["name"]
end
IndexDefinition.new(
table_name,
row["name"],
row["unique"] != 0,
columns,
where: where
)
end
end
private
def schema_creation
SQLite3::SchemaCreation.new(self)
end
def create_table_definition(*args)
SQLite3::TableDefinition.new(*args)
end
def new_column_from_field(table_name, field)
default = \
case field["dflt_value"]
when /^null$/i
nil
when /^'(.*)'$/m
$1.gsub("''", "'")
when /^"(.*)"$/m
$1.gsub('""', '"')
else
field["dflt_value"]
end
type_metadata = fetch_type_metadata(field["type"])
Column.new(field["name"], default, type_metadata, field["notnull"].to_i == 0, table_name, nil, field["collation"])
end
def data_source_sql(name = nil, type: nil)
scope = quoted_scope(name, type: type)
scope[:type] ||= "'table','view'"
sql = "SELECT name FROM sqlite_master WHERE name <> 'sqlite_sequence'"
sql << " AND name = #{scope[:name]}" if scope[:name]
sql << " AND type IN (#{scope[:type]})"
sql
end
def quoted_scope(name = nil, type: nil)
type = \
case type
when "BASE TABLE"
"'table'"
when "VIEW"
"'view'"
end
scope = {}
scope[:name] = quote(name) if name
scope[:type] = type if type
scope
end
end
end
end
end
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