the maximum length of a column name
# File lib/active_record/connection_adapters/abstract/database_limits.rb, line 11 def column_name_length 64 end
the maximum number of columns in a multicolumn index
# File lib/active_record/connection_adapters/abstract/database_limits.rb, line 36 def columns_per_multicolumn_index 16 end
the maximum number of columns per table
# File lib/active_record/connection_adapters/abstract/database_limits.rb, line 26 def columns_per_table 1024 end
the maximum number of elements in an IN (x,y,z) clause
# File lib/active_record/connection_adapters/abstract/database_limits.rb, line 41 def in_clause_length 65535 end
the maximum length of an index name
# File lib/active_record/connection_adapters/abstract/database_limits.rb, line 21 def index_name_length 64 end
the maximum number of indexes per table
# File lib/active_record/connection_adapters/abstract/database_limits.rb, line 31 def indexes_per_table 16 end
maximum number of joins in a single query
# File lib/active_record/connection_adapters/abstract/database_limits.rb, line 51 def joins_per_query 256 end
the maximum length of an SQL query
# File lib/active_record/connection_adapters/abstract/database_limits.rb, line 46 def sql_query_length 1048575 end
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