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Contents
module ActiveRecord
module ConnectionAdapters # :nodoc:
module DatabaseLimits
# the maximum length of a table alias
def table_alias_length
255
end
# the maximum length of a column name
def column_name_length
64
end
# the maximum length of a table name
def table_name_length
64
end
# the maximum length of an index name
def index_name_length
64
end
# the maximum number of columns per table
def columns_per_table
1024
end
# the maximum number of indexes per table
def indexes_per_table
16
end
# the maximum number of columns in a multicolumn index
def columns_per_multicolumn_index
16
end
# the maximum number of elements in an IN (x,y,z) clause
def in_clause_length
65535
end
# the maximum length of a SQL query
def sql_query_length
1048575
end
# maximum number of joins in a single query
def joins_per_query
256
end
end
end
end
Version data entries
27 entries across 27 versions & 5 rubygems