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29 lines
1.0 KiB
29 lines
1.0 KiB
-- Run against the database containing dbo.Housing_Assembly before deploying
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-- the application version that saves resistance. Values are stored in kOhm.
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-- Existing data is not changed; existing columns with a different type are
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-- reported for manual review instead of being altered.
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IF OBJECT_ID(N'dbo.Housing_Assembly', N'U') IS NULL
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BEGIN
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THROW 51003, 'dbo.Housing_Assembly was not found in the current database.', 1;
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END;
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IF COL_LENGTH(N'dbo.Housing_Assembly', N'PT_Resistor_1') IS NULL
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BEGIN
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ALTER TABLE dbo.Housing_Assembly ADD [PT_Resistor_1] DECIMAL(5,2) NULL;
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END
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ELSE IF NOT EXISTS
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(
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SELECT 1
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FROM sys.columns AS c
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WHERE c.object_id = OBJECT_ID(N'dbo.Housing_Assembly', N'U')
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AND c.name = N'PT_Resistor_1'
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AND c.system_type_id = TYPE_ID(N'decimal')
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AND c.user_type_id = TYPE_ID(N'decimal')
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AND c.precision = 5
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AND c.scale = 2
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AND c.is_nullable = 1
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)
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BEGIN
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THROW 51002, 'Housing_Assembly.PT_Resistor_1 must be decimal(5,2) NULL; review the existing column before migration.', 1;
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END;
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GO
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