39 lines
1.2 KiB
Ruby
39 lines
1.2 KiB
Ruby
# frozen_string_literal: true
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require_dependency 'migration/base_dropper'
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module Migration
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class ColumnDropper
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def self.mark_readonly(table_name, column_name)
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BaseDropper.create_readonly_function(table_name, column_name)
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DB.exec <<~SQL
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CREATE TRIGGER #{BaseDropper.readonly_trigger_name(table_name, column_name)}
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BEFORE INSERT OR UPDATE OF #{column_name}
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ON #{table_name}
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FOR EACH ROW
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WHEN (NEW.#{column_name} IS NOT NULL)
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EXECUTE PROCEDURE #{BaseDropper.readonly_function_name(table_name, column_name)};
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SQL
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end
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def self.execute_drop(table, columns)
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table = table.to_s
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columns.each do |column|
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column = column.to_s
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self.drop_readonly(table, column)
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# safe cause it is protected on method entry, can not be passed in params
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DB.exec("ALTER TABLE #{table} DROP COLUMN IF EXISTS #{column}")
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end
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end
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def self.drop_readonly(table_name, column_name)
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BaseDropper.drop_readonly_function(table_name, column_name)
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# Backward compatibility for old functions created in the public schema
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DB.exec("DROP FUNCTION IF EXISTS #{BaseDropper.old_readonly_function_name(table_name, column_name)} CASCADE")
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end
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end
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end
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