Revision 14333
Added by Aaron Marcuse-Kubitza almost 10 years ago
| trunk/schemas/util.sql | ||
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LANGUAGE sql STABLE |
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AS $$ |
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SELECT |
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-- expr not changing and constraint already enabled
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def.expr IS NOT DISTINCT FROM util.derived_col_expr(def.col)
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AND util.check_constraint_enabled(def.col::util.table_item)
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-- existing constraint enabled, and no expr change that would disable it
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util.check_constraint_enabled(def.col::util.table_item)
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AND def.expr IS NOT DISTINCT FROM util.derived_col_expr(def.col)
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OR |
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NOT util.table_has_data((def).col.table_) -- empty, so would always pass |
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$$; |
Also available in: Unified diff
schemas/util.sql: derived_col_constraint_initially_enabled(): clarified that this is always based on whether the existing constraint is enabled