62 lines
2.8 KiB
C#
62 lines
2.8 KiB
C#
using System;
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using Microsoft.EntityFrameworkCore.Migrations;
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using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
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#nullable disable
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namespace DD.Persistence.Database.Postgres.Migrations.PersistencePostgres
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{
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/// <inheritdoc />
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public partial class ParameterDataMigration : Migration
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{
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/// <inheritdoc />
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protected override void Up(MigrationBuilder migrationBuilder)
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{
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migrationBuilder.CreateTable(
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name: "ParameterData",
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columns: table => new
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{
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DiscriminatorId = table.Column<Guid>(type: "uuid", nullable: false, comment: "Дискриминатор системы"),
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ParameterId = table.Column<int>(type: "integer", nullable: false, comment: "Id параметра")
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.Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
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Timestamp = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: false, comment: "Временная отметка"),
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Value = table.Column<string>(type: "varchar(256)", nullable: true, comment: "Значение параметра в виде строки")
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},
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constraints: table =>
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{
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table.PrimaryKey("PK_ParameterData", x => new { x.DiscriminatorId, x.ParameterId, x.Timestamp });
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});
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string sql;
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for (int i = 1; i <= 25; i++)
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{
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sql = $"create table if not exists \"ParameterData{i}\" (like public.\"ParameterData\" including all) inherits (public.\"ParameterData\");";
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migrationBuilder.Sql(sql);
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}
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//sql = "create or replace function partition_for_parameter_data() returns trigger as $$ " +
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// "DECLARE " +
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// " v_parition_name text; " +
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// "BEGIN " +
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// " v_parition_name := format( 'ParameterData%s', NEW.\"ParameterId\" / 1000 ); " +
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// " execute 'INSERT INTO public.\"' || v_parition_name || '\" VALUES ( ($1).* )' USING NEW; " +
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// " return NULL; " +
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// "END; " +
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// "$$ language plpgsql;";
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//migrationBuilder.Sql(sql);
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//sql = "create or replace trigger partition_parameter_data " +
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// "before insert on public.\"ParameterData\" " +
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// "for each row execute procedure public.partition_for_parameter_data();";
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//migrationBuilder.Sql(sql);
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}
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/// <inheritdoc />
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protected override void Down(MigrationBuilder migrationBuilder)
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{
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migrationBuilder.DropTable(
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name: "ParameterData");
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}
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}
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}
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