58 lines
1.1 KiB
Ruby
58 lines
1.1 KiB
Ruby
module ActiveRecord
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module ConnectionAdapters # :nodoc:
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module DatabaseLimits
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# the maximum length of a table alias
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def table_alias_length
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255
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end
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# the maximum length of a column name
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def column_name_length
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64
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end
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# the maximum length of a table name
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def table_name_length
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64
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end
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# the maximum length of an index name
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def index_name_length
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64
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end
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# the maximum number of columns per table
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def columns_per_table
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1024
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end
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# the maximum number of indexes per table
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def indexes_per_table
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16
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end
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# the maximum number of columns in a multicolumn index
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def columns_per_multicolumn_index
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16
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end
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# the maximum number of elements in an IN (x,y,z) clause
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def in_clause_length
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65535
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end
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# the maximum length of a SQL query
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def sql_query_length
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1048575
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end
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# maximum number of joins in a single query
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def joins_per_query
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256
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end
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end
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end
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end
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