Joseph Doherty
60 lines
2.5 KiB
C#
60 lines
2.5 KiB
C#
using System;
|
|
using Microsoft.EntityFrameworkCore.Migrations;
|
|
|
|
#nullable disable
|
|
|
|
namespace ScadaLink.ConfigurationDatabase.Migrations
|
|
{
|
|
/// <summary>
|
|
/// Adds the <c>ParentExecutionId</c> correlation column to the centralized
|
|
/// <c>AuditLog</c> table (#23). <c>ParentExecutionId</c> carries the
|
|
/// <c>ExecutionId</c> of the execution that spawned this run, letting a
|
|
/// spawned execution point back at its spawner — a sibling to the universal
|
|
/// per-run <c>ExecutionId</c>.
|
|
///
|
|
/// The change is purely additive:
|
|
/// 1. <c>ParentExecutionId uniqueidentifier NULL</c> is added with no default,
|
|
/// so the operation is a metadata-only <c>ALTER TABLE … ADD</c> — it does
|
|
/// NOT rewrite the monthly-partitioned <c>AuditLog</c> table, and
|
|
/// historical rows stay <c>NULL</c> (no backfill).
|
|
/// 2. <c>IX_AuditLog_ParentExecution</c> is created via raw SQL so it lands on
|
|
/// the <c>ps_AuditLog_Month(OccurredAtUtc)</c> partition scheme, matching
|
|
/// every other <c>IX_AuditLog_*</c> index. Keeping it partition-aligned
|
|
/// preserves the partition-switch purge path (see
|
|
/// AuditLogRepository.SwitchOutPartitionAsync).
|
|
/// </summary>
|
|
public partial class AddAuditLogParentExecutionId : Migration
|
|
{
|
|
/// <inheritdoc />
|
|
protected override void Up(MigrationBuilder migrationBuilder)
|
|
{
|
|
migrationBuilder.AddColumn<Guid>(
|
|
name: "ParentExecutionId",
|
|
table: "AuditLog",
|
|
type: "uniqueidentifier",
|
|
nullable: true);
|
|
|
|
// Raw SQL so the index is created on the partition scheme — EF's
|
|
// CreateIndex cannot express the ON ps_AuditLog_Month(OccurredAtUtc)
|
|
// clause. Mirrors IX_AuditLog_Execution (filtered, aligned).
|
|
migrationBuilder.Sql(@"
|
|
CREATE NONCLUSTERED INDEX IX_AuditLog_ParentExecution
|
|
ON dbo.AuditLog (ParentExecutionId)
|
|
WHERE ParentExecutionId IS NOT NULL
|
|
ON ps_AuditLog_Month(OccurredAtUtc);");
|
|
}
|
|
|
|
/// <inheritdoc />
|
|
protected override void Down(MigrationBuilder migrationBuilder)
|
|
{
|
|
migrationBuilder.Sql(@"
|
|
IF EXISTS (SELECT 1 FROM sys.indexes WHERE name = 'IX_AuditLog_ParentExecution' AND object_id = OBJECT_ID('dbo.AuditLog'))
|
|
DROP INDEX IX_AuditLog_ParentExecution ON dbo.AuditLog;");
|
|
|
|
migrationBuilder.DropColumn(
|
|
name: "ParentExecutionId",
|
|
table: "AuditLog");
|
|
}
|
|
}
|
|
}
|