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27.4.3.24 The schema_auto_increment_columns View

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This view indicates which tables have AUTO_INCREMENT columns and provides information about those columns, such as the current and maximum column values and the usage ratio (ratio of used to possible values). By default, rows are sorted by descending usage ratio and maximum column value.

Tables in these schemas are excluded from view output: mysql, sys, INFORMATION_SCHEMA, performance_schema.

The schema_auto_increment_columns view has these columns:

  • table_schema

    The schema that contains the table.

  • table_name

    The table that contains the AUTO_INCREMENT column.

  • column_name

    The name of the AUTO_INCREMENT column.

  • data_type

    The data type of the column.

  • column_type

    The column type of the column, which is the data type plus possibly other information. For example, for a column with a bigint(20) unsigned column type, the data type is just bigint.

  • is_signed

    Whether the column type is signed.

  • is_unsigned

    Whether the column type is unsigned.

  • max_value

    The maximum permitted value for the column.

  • auto_increment

    The current AUTO_INCREMENT value for the column.

  • auto_increment_ratio

    The ratio of used to permitted values for the column. This indicates how much of the sequence of values is “used up.”


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Document created the 26/06/2006, last modified the 26/10/2018
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