Methods
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Instance Public methods
column_name_length()

the maximum length of a column name

# File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 11
def column_name_length
  64
end
columns_per_multicolumn_index()

the maximum number of columns in a multicolumn index

# File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 36
def columns_per_multicolumn_index
  16
end
columns_per_table()

the maximum number of columns per table

# File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 26
def columns_per_table
  1024
end
in_clause_length()

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

# File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 41
def in_clause_length
  65535
end
index_name_length()

the maximum length of an index name

# File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 21
def index_name_length
  64
end
indexes_per_table()

the maximum number of indexes per table

# File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 31
def indexes_per_table
  16
end
joins_per_query()

maximum number of joins in a single query

# File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 51
def joins_per_query
  256
end
sql_query_length()

the maximum length of a SQL query

# File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 46
def sql_query_length
  1048575
end
table_alias_length()

the maximum length of a table alias

# File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 6
def table_alias_length
  255
end
table_name_length()

the maximum length of a table name

# File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 16
def table_name_length
  64
end