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Returns the maximum length of a column name.
Source: show
# File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 11 def column_name_length 64 end
Returns the maximum number of columns in a multicolumn index.
Source: show
# File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 36 def columns_per_multicolumn_index 16 end
Returns the maximum number of columns per table.
Source: show
# File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 26 def columns_per_table 1024 end
Returns the maximum number of elements in an IN (x,y,z) clause. nil means no limit.
Source: show
# File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 42 def in_clause_length nil end
Returns the maximum length of an index name.
Source: show
# File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 21 def index_name_length 64 end
Returns the maximum number of indexes per table.
Source: show
# File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 31 def indexes_per_table 16 end
Returns maximum number of joins in a single query.
Source: show
# File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 52 def joins_per_query 256 end
Returns the maximum length of an SQL query.
Source: show
# File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 47 def sql_query_length 1048575 end
Returns the maximum length of a table alias.
Source: show
# File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 6 def table_alias_length 255 end
Returns the maximum length of a table name.
Source: show
# File activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb, line 16 def table_name_length 64 end