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sql: Add Logical Column ID field to ColumnDescriptor #46992

Merged
merged 1 commit into from
Apr 29, 2020
Merged

sql: Add Logical Column ID field to ColumnDescriptor #46992

merged 1 commit into from
Apr 29, 2020

Commits on Apr 29, 2020

  1. Add LogicalColumnID field to ColumnDescriptor. 

    The LogicalColumnID field mimics the ColumnID field however LogicalColumnID may be swapped
between two columns whereas ColumnID cannot. LogicalColumnID is referenced for virtual tables
(pg_catalog, information_schema) and most notably affects column ordering for SHOW COLUMNS.

This LogicalColumnID field support swapping the order of two columns - currently only used for
ALTER COLUMN TYPE when a shadow column is created and swapped with it's original column.

Does not affect existing behaviour.

Release note: None
    @RichardJCai
    RichardJCai committed Apr 29, 2020
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