fix: add AT and ZONE to PostgreSQL SQL keywords for prepareSql

The prepareSql function quotes any word not in SQL_KEYWORDS as an
identifier. Since AT and ZONE were missing from the set, the expression
(NOW() AT TIME ZONE 'UTC') was mangled into (NOW() "AT" TIME "ZONE"
'UTC'), causing INSERT failures on PostgreSQL.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/main/ipc/extractor-handler.ts

@@ -126,7 +126,9 @@ export function registerExtractorHandlers(): void {
           sendLog(sender, 'info', '正在解析订单号...')
 
           const resolver = new OrderNumberResolver(dbService)
+          const resolutionStart = Date.now()
           const mappings = await resolver.resolve(input.orderNumbers)
+          const resolutionDurationMs = Date.now() - resolutionStart
 
           // Get valid order numbers and warnings
           const validOrderNumbers = resolver.getValidOrderNumbers(mappings)
@@ -146,7 +148,16 @@ export function registerExtractorHandlers(): void {
             )
           }
 
-          log.info('Resolved order numbers', { count: validOrderNumbers.length })
+          log.info('Resolved order numbers', {
+            inputCount: input.orderNumbers.length,
+            count: validOrderNumbers.length,
+            durationMs: resolutionDurationMs
+          })
+          sendLog(
+            sender,
+            'info',
+            `订单号解析完成：${validOrderNumbers.length}/${input.orderNumbers.length} 个有效，耗时 ${(resolutionDurationMs / 1000).toFixed(2)} 秒`
+          )
 
           // Initialize operation history recording
           const currentUser = SessionManager.getInstance().getUserInfo()
@@ -155,6 +166,7 @@ export function registerExtractorHandlers(): void {
 
           // Save order records to history (preserve productionId -> orderNumber mapping)
           if (currentUser) {
+            const historyInsertStart = Date.now()
             const orderRecords = mappings.map((m) => ({
               productionId: m.productionId || null,
               orderNumber: m.orderNumber || m.input
@@ -165,9 +177,11 @@ export function registerExtractorHandlers(): void {
               currentUser.username,
               orderRecords
             )
+            const historyInsertDurationMs = Date.now() - historyInsertStart
             log.info('Operation history batch created', {
               batchId,
-              recordCount: orderRecords.length
+              recordCount: orderRecords.length,
+              durationMs: historyInsertDurationMs
             })
           }
 

src/main/services/database/data-importer.ts

@@ -96,45 +96,12 @@ export class DataImportService {
       // Step 1: Read Excel file
       log.info('Reading Excel file...')
       const { records, sourceNumbers } = await this.readExcelFile(filePath)
-      result.recordsRead = records.length
-      result.uniqueSourceNumbers = sourceNumbers.size
-
       log.info('Excel read completed', {
-        recordsRead: result.recordsRead,
-        uniqueSourceNumbers: result.uniqueSourceNumbers
+        recordsRead: records.length,
+        uniqueSourceNumbers: sourceNumbers.size
       })
 
-      if (records.length === 0) {
-        result.success = true
-        result.errors.push('Excel file contains no data records')
-        return result
-      }
-
-      // Step 2: Delete existing records by SourceNumber
-      log.info('Deleting existing records...', {
-        sourceNumberCount: sourceNumbers.size
-      })
-
-      const sourceNumberArray = Array.from(sourceNumbers)
-      result.recordsDeleted = await this.dao.deleteBySourceNumbers(sourceNumberArray)
-
-      log.info('Existing records deleted', {
-        recordsDeleted: result.recordsDeleted
-      })
-
-      // Step 3: Batch insert new records
-      log.info('Inserting new records...', {
-        recordCount: records.length,
-        batchSize
-      })
-
-      result.recordsImported = await this.dao.batchInsert(records, batchSize)
-
-      log.info('Records imported successfully', {
-        recordsImported: result.recordsImported
-      })
-
-      result.success = true
+      await this.importRecords(records, batchSize, result)
     } catch (error) {
       const errorMsg = error instanceof Error ? error.message : String(error)
       result.errors.push(`Import failed: ${errorMsg}`)
@@ -167,6 +134,92 @@ export class DataImportService {
     return result
   }
 
+  /**
+   * Import already parsed records to database.
+   *
+   * This is the preferred path for extraction: the downloader/parser already has
+   * structured rows, so database persistence should not require writing and
+   * reading an intermediate Excel file.
+   */
+  async importFromRecords(records: MaterialPlanRecord[], batchSize = 1000): Promise<ImportResult> {
+    const result: ImportResult = {
+      success: false,
+      recordsRead: 0,
+      recordsDeleted: 0,
+      recordsImported: 0,
+      uniqueSourceNumbers: 0,
+      errors: []
+    }
+
+    try {
+      log.info('Starting import from parsed records', {
+        recordCount: records.length,
+        batchSize
+      })
+
+      return await this.importRecords(records, batchSize, result)
+    } catch (error) {
+      const errorMsg = error instanceof Error ? error.message : String(error)
+      result.errors.push(`Import failed: ${errorMsg}`)
+      log.error('Import from records failed', { error: errorMsg })
+      return result
+    } finally {
+      try {
+        await this.dao.disconnect()
+      } catch (e) {
+        log.warn('Error disconnecting DAO', {
+          error: e instanceof Error ? e.message : String(e)
+        })
+      }
+
+      logAuditWithCurrentUser(
+        AuditAction.DATA_IMPORT,
+        'MATERIAL_PLAN',
+        result.success ? AuditStatus.SUCCESS : AuditStatus.FAILURE,
+        {
+          recordsRead: result.recordsRead,
+          recordsDeleted: result.recordsDeleted,
+          recordsImported: result.recordsImported,
+          uniqueSourceNumbers: result.uniqueSourceNumbers,
+          errorCount: result.errors.length
+        }
+      )
+    }
+  }
+
+  private async importRecords(
+    records: MaterialPlanRecord[],
+    batchSize: number,
+    result: ImportResult
+  ): Promise<ImportResult> {
+    const sourceNumbers = new Set(records.map((record) => record.sourceNumber).filter(Boolean))
+    result.recordsRead = records.length
+    result.uniqueSourceNumbers = sourceNumbers.size
+
+    if (records.length === 0) {
+      result.success = true
+      result.errors.push('No data records to import')
+      return result
+    }
+
+    // Step 1: Replace existing records by SourceNumber
+    log.info('Replacing existing records...', {
+      sourceNumberCount: sourceNumbers.size
+    })
+
+    const replaceResult = await this.dao.replaceBySourceNumbers(records, batchSize)
+    result.recordsDeleted = replaceResult.deleted
+    result.recordsImported = replaceResult.inserted
+
+    log.info('Records replaced successfully', {
+      recordsDeleted: result.recordsDeleted,
+      recordsImported: result.recordsImported
+    })
+
+    result.success = true
+    return result
+  }
+
   /**
    * Read Excel file and extract records
    * @param filePath - Path to the Excel file

src/main/services/database/dialects/postgresql-dialect.ts

@@ -26,7 +26,7 @@ export class PostgreSqlDialect implements SqlDialect {
   }
 
   currentTimestamp(): string {
-    return 'CURRENT_TIMESTAMP'
+    return "(NOW() AT TIME ZONE 'UTC')"
   }
 
   upsert(params: {

src/main/services/database/discrete-material-plan-dao.ts

@@ -13,6 +13,7 @@ import { createDialect, type SqlDialect } from './dialects'
 import { createLogger, getRequestId, trackDuration } from '../logger'
 
 const log = createLogger('DiscreteMaterialPlanDAO')
+const SQLSERVER_REPLACE_SOURCE_NUMBER_BATCH_SIZE = 25
 
 /**
  * Material plan record interface
@@ -562,9 +563,16 @@ export class DiscreteMaterialPlanDAO {
       const tableName = this.getTableName()
       const dialect = this.getDialect()
 
-      // SQL Server has a limit of 2100 parameters per query
-      // Each record has 28 columns, so max rows per batch = 2100 / 28 = 75
-      // Leave some margin for query overhead
+      if (dbService.type === 'sqlserver') {
+        return await this.batchInsertSqlServerJson(
+          dbService,
+          tableName,
+          records,
+          batchSize,
+          batchId
+        )
+      }
+
       const columnsPerRow = 28
       const effectiveBatchSize = Math.min(batchSize, dialect.maxBatchRows(columnsPerRow))
       const totalBatches = Math.ceil(records.length / effectiveBatchSize)
@@ -626,6 +634,237 @@ export class DiscreteMaterialPlanDAO {
     }
   }
 
+  async replaceBySourceNumbers(
+    records: MaterialPlanRecord[],
+    batchSize = 1000
+  ): Promise<{ deleted: number; inserted: number }> {
+    if (!records || records.length === 0) {
+      return { deleted: 0, inserted: 0 }
+    }
+
+    const dbService = await this.getDatabaseService()
+    const sourceNumbers = [...new Set(records.map((record) => record.sourceNumber).filter(Boolean))]
+
+    if (dbService.type === 'sqlserver') {
+      return await this.replaceSqlServerJson(dbService, records, sourceNumbers)
+    }
+
+    const deleted = await this.deleteBySourceNumbers(sourceNumbers)
+    const inserted = await this.batchInsert(records, batchSize)
+    return { deleted, inserted }
+  }
+
+  private async replaceSqlServerJson(
+    dbService: IDatabaseService,
+    records: MaterialPlanRecord[],
+    sourceNumbers: string[]
+  ): Promise<{ deleted: number; inserted: number }> {
+    const tableName = this.getTableName()
+    const columns = this.getInsertColumns()
+    const withColumns = this.getSqlServerJsonWithColumns(columns)
+    const quotedColumns = columns.map((column) => `[${column}]`).join(', ')
+    const recordsBySourceNumber = this.groupRecordsBySourceNumber(records)
+    const totalBatches = Math.ceil(
+      sourceNumbers.length / SQLSERVER_REPLACE_SOURCE_NUMBER_BATCH_SIZE
+    )
+    let totalDeleted = 0
+    let totalInserted = 0
+
+    log.info('SQL Server JSON replace started', {
+      tableName,
+      operationType: 'REPLACE',
+      totalSourceNumbers: sourceNumbers.length,
+      totalRecords: records.length,
+      sourceNumberBatchSize: SQLSERVER_REPLACE_SOURCE_NUMBER_BATCH_SIZE,
+      totalBatches
+    })
+
+    for (
+      let offset = 0;
+      offset < sourceNumbers.length;
+      offset += SQLSERVER_REPLACE_SOURCE_NUMBER_BATCH_SIZE
+    ) {
+      const sourceNumberBatch = sourceNumbers.slice(
+        offset,
+        offset + SQLSERVER_REPLACE_SOURCE_NUMBER_BATCH_SIZE
+      )
+      const batchNumber = Math.floor(offset / SQLSERVER_REPLACE_SOURCE_NUMBER_BATCH_SIZE) + 1
+      const recordBatch = sourceNumberBatch.flatMap(
+        (sourceNumber) => recordsBySourceNumber.get(sourceNumber) || []
+      )
+      const jsonRows = recordBatch.map((record) => this.buildJsonRow(record, columns))
+
+      const sqlString = `
+        DECLARE @deleted int = 0;
+        DECLARE @inserted int = 0;
+
+        BEGIN TRY
+          BEGIN TRANSACTION;
+
+          DELETE target
+          FROM ${tableName} AS target
+          INNER JOIN OPENJSON(@p0)
+          WITH (SourceNumber nvarchar(100) '$') AS source
+            ON target.SourceNumber = source.SourceNumber;
+          SET @deleted = @@ROWCOUNT;
+
+          INSERT INTO ${tableName} (${quotedColumns})
+          SELECT ${quotedColumns}
+          FROM OPENJSON(@p1)
+          WITH (
+            ${withColumns}
+          );
+          SET @inserted = @@ROWCOUNT;
+
+          COMMIT TRANSACTION;
+        END TRY
+        BEGIN CATCH
+          IF @@TRANCOUNT > 0
+            ROLLBACK TRANSACTION;
+          THROW;
+        END CATCH;
+
+        SELECT @deleted AS deletedCount, @inserted AS insertedCount;
+      `
+
+      const result = await trackDuration(
+        async () =>
+          await dbService.query(sqlString, [
+            JSON.stringify(sourceNumberBatch),
+            JSON.stringify(jsonRows)
+          ]),
+        {
+          operationName: 'DiscreteMaterialPlanDAO.replaceSqlServerJsonBatch',
+          context: {
+            tableName,
+            operationType: 'REPLACE',
+            batchNumber,
+            totalBatches,
+            sourceNumberCount: sourceNumberBatch.length,
+            recordCount: recordBatch.length
+          }
+        }
+      )
+
+      const stats = result.result.rows[0] || {}
+      totalDeleted += Number(stats.deletedCount || 0)
+      totalInserted += Number(stats.insertedCount || recordBatch.length)
+
+      log.debug('SQL Server JSON replace batch completed', {
+        tableName,
+        batchNumber,
+        totalBatches,
+        sourceNumberCount: sourceNumberBatch.length,
+        recordCount: recordBatch.length
+      })
+    }
+
+    log.info('SQL Server JSON replace completed', {
+      tableName,
+      operationType: 'REPLACE',
+      totalDeleted,
+      totalInserted,
+      totalBatches
+    })
+
+    return {
+      deleted: totalDeleted,
+      inserted: totalInserted
+    }
+  }
+
+  private groupRecordsBySourceNumber(
+    records: MaterialPlanRecord[]
+  ): Map<string, MaterialPlanRecord[]> {
+    const groups = new Map<string, MaterialPlanRecord[]>()
+
+    for (const record of records) {
+      if (!record.sourceNumber) {
+        continue
+      }
+
+      const existing = groups.get(record.sourceNumber) || []
+      existing.push(record)
+      groups.set(record.sourceNumber, existing)
+    }
+
+    return groups
+  }
+
+  private async batchInsertSqlServerJson(
+    dbService: IDatabaseService,
+    tableName: string,
+    records: MaterialPlanRecord[],
+    batchSize: number,
+    batchId: string
+  ): Promise<number> {
+    const columns = this.getInsertColumns()
+    const effectiveBatchSize = Math.max(1, batchSize)
+    const totalBatches = Math.ceil(records.length / effectiveBatchSize)
+    let totalInserted = 0
+
+    log.info('SQL Server JSON batch insert started', {
+      tableName,
+      operationType: 'INSERT',
+      requestId: batchId,
+      totalRecords: records.length,
+      effectiveBatchSize,
+      totalBatches
+    })
+
+    for (let i = 0; i < records.length; i += effectiveBatchSize) {
+      const batch = records.slice(i, i + effectiveBatchSize)
+      const batchNumber = Math.floor(i / effectiveBatchSize) + 1
+      const jsonRows = batch.map((record) => this.buildJsonRow(record, columns))
+
+      const withColumns = this.getSqlServerJsonWithColumns(columns)
+      const quotedColumns = columns.map((column) => `[${column}]`).join(', ')
+
+      const sqlString = `
+        INSERT INTO ${tableName} (${quotedColumns})
+        SELECT ${quotedColumns}
+        FROM OPENJSON(@p0)
+        WITH (
+          ${withColumns}
+        )
+      `
+
+      const result = await trackDuration(
+        async () => await dbService.query(sqlString, [JSON.stringify(jsonRows)]),
+        {
+          operationName: 'DiscreteMaterialPlanDAO.insertBatchSqlServerJson',
+          context: {
+            tableName,
+            operationType: 'INSERT',
+            batchId,
+            batchNumber,
+            totalBatches,
+            recordCount: batch.length
+          }
+        }
+      )
+      totalInserted += result.result.rowCount || batch.length
+
+      log.debug('Inserted SQL Server JSON batch', {
+        batch: batchNumber,
+        totalBatches,
+        count: batch.length,
+        batchId
+      })
+    }
+
+    log.info('SQL Server JSON batch insert completed', {
+      tableName,
+      operationType: 'INSERT',
+      requestId: batchId,
+      totalInserted,
+      batchSize: effectiveBatchSize,
+      totalBatches
+    })
+
+    return totalInserted
+  }
+
   /**
    * Insert a single batch of records with tracking
    */
@@ -641,37 +880,7 @@ export class DiscreteMaterialPlanDAO {
       return 0
     }
 
-    // Build column list (excluding id)
-    const columns = [
-      'Factory',
-      'MaterialStatus',
-      'PlanNumber',
-      'SourceNumber',
-      'MaterialType',
-      'ProductCode',
-      'ProductName',
-      'ProductUnit',
-      'ProductPlanQuantity',
-      'UseDepartment',
-      'Remark',
-      'Creator',
-      'CreateDate',
-      'Approver',
-      'ApproveDate',
-      'SequenceNumber',
-      'MaterialCode',
-      'MaterialName',
-      'Specification',
-      'Model',
-      'DrawingNumber',
-      'MaterialQuality',
-      'PlanQuantity',
-      'Unit',
-      'RequiredDate',
-      'Warehouse',
-      'UnitUsage',
-      'CumulativeOutputQuantity'
-    ]
+    const columns = this.getInsertColumns()
 
     // Build parameterized insert
     const values: any[] = []
@@ -730,6 +939,91 @@ export class DiscreteMaterialPlanDAO {
     })
   }
 
+  private getInsertColumns(): string[] {
+    return [
+      'Factory',
+      'MaterialStatus',
+      'PlanNumber',
+      'SourceNumber',
+      'MaterialType',
+      'ProductCode',
+      'ProductName',
+      'ProductUnit',
+      'ProductPlanQuantity',
+      'UseDepartment',
+      'Remark',
+      'Creator',
+      'CreateDate',
+      'Approver',
+      'ApproveDate',
+      'SequenceNumber',
+      'MaterialCode',
+      'MaterialName',
+      'Specification',
+      'Model',
+      'DrawingNumber',
+      'MaterialQuality',
+      'PlanQuantity',
+      'Unit',
+      'RequiredDate',
+      'Warehouse',
+      'UnitUsage',
+      'CumulativeOutputQuantity'
+    ]
+  }
+
+  private buildJsonRow(record: MaterialPlanRecord, columns: string[]): Record<string, unknown> {
+    const row: Record<string, unknown> = {}
+
+    for (const column of columns) {
+      const value = this.getColumnValue(record, column)
+      row[column] = value instanceof Date ? value.toISOString() : value
+    }
+
+    return row
+  }
+
+  private getSqlServerJsonWithColumns(columns: string[]): string {
+    return columns
+      .map((column) => `[${column}] ${this.getSqlServerJsonColumnType(column)} '$.${column}'`)
+      .join(',\n          ')
+  }
+
+  private getSqlServerJsonColumnType(column: string): string {
+    const columnTypes: Record<string, string> = {
+      Factory: 'nvarchar(100)',
+      MaterialStatus: 'nvarchar(50)',
+      PlanNumber: 'nvarchar(100)',
+      SourceNumber: 'nvarchar(100)',
+      MaterialType: 'nvarchar(100)',
+      ProductCode: 'nvarchar(100)',
+      ProductName: 'nvarchar(255)',
+      ProductUnit: 'nvarchar(50)',
+      ProductPlanQuantity: 'decimal(18,4)',
+      UseDepartment: 'nvarchar(100)',
+      Remark: 'nvarchar(500)',
+      Creator: 'nvarchar(100)',
+      CreateDate: 'datetime2',
+      Approver: 'nvarchar(100)',
+      ApproveDate: 'datetime2',
+      SequenceNumber: 'int',
+      MaterialCode: 'nvarchar(100)',
+      MaterialName: 'nvarchar(255)',
+      Specification: 'nvarchar(255)',
+      Model: 'nvarchar(255)',
+      DrawingNumber: 'nvarchar(100)',
+      MaterialQuality: 'nvarchar(100)',
+      PlanQuantity: 'decimal(18,4)',
+      Unit: 'nvarchar(50)',
+      RequiredDate: 'datetime2',
+      Warehouse: 'nvarchar(100)',
+      UnitUsage: 'decimal(18,6)',
+      CumulativeOutputQuantity: 'decimal(18,4)'
+    }
+
+    return columnTypes[column] || 'nvarchar(max)'
+  }
+
   /**
    * Get the value for a specific column from the record
    */
@@ -777,6 +1071,10 @@ export class DiscreteMaterialPlanDAO {
       return null
     }
 
+    if (value instanceof Date && Number.isNaN(value.getTime())) {
+      return null
+    }
+
     // Handle empty strings for string fields
     if (typeof value === 'string' && value.trim() === '') {
       return null

src/main/services/database/extractor-operation-history-dao.ts

@@ -126,35 +126,47 @@ export class ExtractorOperationHistoryDAO {
         recordCount: records.length
       })
 
-      for (const record of records) {
+      const columnsPerRecord = 5
+      const batchSize = Math.max(1, dialect.maxBatchRows(columnsPerRecord))
+
+      for (let offset = 0; offset < records.length; offset += batchSize) {
+        const batch = records.slice(offset, offset + batchSize)
         try {
+          const valuesSql: string[] = []
+          const params: (string | number | null)[] = []
+
+          batch.forEach((record, index) => {
+            const paramOffset = index * columnsPerRecord
+            valuesSql.push(
+              `(${dialect.param(paramOffset)}, ${dialect.param(paramOffset + 1)}, ${dialect.param(paramOffset + 2)}, ${dialect.param(paramOffset + 3)}, ${dialect.param(paramOffset + 4)}, ${dialect.currentTimestamp()}, 'pending')`
+            )
+            params.push(batchId, userId, username, record.productionId || null, record.orderNumber)
+          })
+
           const sqlString = `
             INSERT INTO ${tableName}
               (BatchId, UserId, Username, ProductionId, OrderNumber, OperationTime, Status)
             VALUES
-              (${dialect.param(0)}, ${dialect.param(1)}, ${dialect.param(2)}, ${dialect.param(3)}, ${dialect.param(4)}, ${dialect.currentTimestamp()}, 'pending')
+              ${valuesSql.join(',\n              ')}
           `
-          await trackDuration(
-            async () =>
-              await dbService.query(sqlString, [
-                batchId,
-                userId,
-                username,
-                record.productionId || null,
-                record.orderNumber
-              ]),
-            {
+          await trackDuration(async () => await dbService.query(sqlString, params), {
             operationName: 'ExtractorOperationHistoryDAO.insertBatchRecords',
-              context: { tableName, operationType: 'INSERT', batchId }
+            context: {
+              tableName,
+              operationType: 'INSERT',
+              batchId,
+              batchOffset: offset,
+              batchCount: batch.length
             }
-          )
+          })
         } catch (error) {
-          log.error('Error inserting individual record', {
+          log.error('Error inserting record batch', {
             tableName,
             operationType: 'INSERT',
             requestId,
             batchId,
-            orderNumber: record.orderNumber,
+            batchOffset: offset,
+            batchCount: batch.length,
             error: error instanceof Error ? error.message : String(error)
           })
         }

src/main/services/database/postgresql.ts

@@ -339,7 +339,11 @@ const SQL_KEYWORDS = new Set([
   'IF',
   'CURRENT_TIMESTAMP',
   'NOW',
-  'GETDATE'
+  'GETDATE',
+
+  // ==================== Timezone Expression ====================
+  'AT',
+  'ZONE'
 ])
 
 /**

src/main/services/database/sql-server.ts

@@ -38,6 +38,8 @@ export class SqlServerService implements IDatabaseService {
         user: this.config.user,
         password: this.config.password,
         database: this.config.database,
+        requestTimeout: 60000,
+        connectionTimeout: 15000,
         options: {
           encrypt: this.config.options?.encrypt ?? false,
           trustServerCertificate: this.config.options?.trustServerCertificate ?? false

src/main/services/erp/extractor.ts

@@ -10,6 +10,7 @@ import type {
   LogLevel
 } from '../../types/extractor.types'
 import { DataImportService } from '../database/data-importer'
+import type { MaterialPlanRecord } from '../database/discrete-material-plan-dao'
 import { createLogger, withRequestContext, getRequestId } from '../logger'
 import { trackDuration } from '../logger/performance-monitor'
 
@@ -112,16 +113,18 @@ export class ExtractorService {
             // Always clean up temporary files regardless of merge success
             await this.cleanupTempFiles(result.downloadedFiles, input.orderNumbers)
 
-            // Auto-import to database if merge was successful
-            if (result.mergedFile) {
+            // Auto-import parsed records directly. The merged Excel file is an archive artifact,
+            // not the source for persistence.
+            if (mergeResult.records.length > 0) {
               const importProgress = (1 + totalBatches + 1) * progressPerPoint
               input.onProgress?.('正在写入数据库...', importProgress, {
                 phase: 'importing',
                 totalBatches
               })
-              const importResult = await this.importToDatabaseWithLogging(
-                result.mergedFile,
-                input.onLog
+              const importResult = await this.importRecordsToDatabaseWithLogging(
+                mergeResult.records,
+                input.onLog,
+                result.mergedFile
               )
               result.importResult = importResult
 
@@ -168,9 +171,10 @@ export class ExtractorService {
     recordCount: number
     error?: string
     orderRecordCounts: Array<{ orderNumber: string; recordCount: number }>
+    records: MaterialPlanRecord[]
   }> {
     if (filePaths.length === 0) {
-      return { mergedFile: null, recordCount: 0, orderRecordCounts: [] }
+      return { mergedFile: null, recordCount: 0, orderRecordCounts: [], records: [] }
     }
 
     log.info('Starting merge', { fileCount: filePaths.length, orderCount: orderNumbers.length })
@@ -219,10 +223,11 @@ export class ExtractorService {
         }
 
         log.info('Merge summary', { orderCount: allOrders.length, recordCount })
+        const records = this.buildMaterialPlanRecords(allOrders)
 
         if (recordCount === 0) {
           log.warn('No records found in any downloaded files', { orderNumbers })
-          return { mergedFile: null, recordCount: 0, orderRecordCounts }
+          return { mergedFile: null, recordCount: 0, orderRecordCounts, records }
         }
 
         // Generate output filename with timestamp
@@ -238,7 +243,7 @@ export class ExtractorService {
           log.info('Saving merged file', { outputPath })
           await this.saveMergedOrders(allOrders, outputPath)
           log.info('Merged file saved successfully', { recordCount })
-          return { mergedFile: outputPath, recordCount, orderRecordCounts }
+          return { mergedFile: outputPath, recordCount, orderRecordCounts, records }
         } catch (error) {
           const errorMsg = error instanceof Error ? error.message : String(error)
           const errorStack = error instanceof Error ? error.stack : ''
@@ -253,6 +258,7 @@ export class ExtractorService {
             mergedFile: null,
             recordCount,
             orderRecordCounts,
+            records,
             error: `保存合并文件失败：${errorMsg}`
           }
         }
@@ -370,6 +376,78 @@ export class ExtractorService {
     log.debug('File saved successfully', { outputPath })
   }
 
+  private buildMaterialPlanRecords(
+    orders: Array<{ orderInfo: any; materials: any[] }>
+  ): MaterialPlanRecord[] {
+    const records: MaterialPlanRecord[] = []
+
+    for (const order of orders) {
+      const { orderInfo, materials } = order
+
+      for (const material of materials) {
+        records.push({
+          factory: this.toText(orderInfo.factory),
+          materialStatus: this.toText(orderInfo.materialStatus),
+          planNumber: this.toText(orderInfo.planNumber),
+          sourceNumber: this.toText(orderInfo.productionOrder),
+          materialType: this.toText(orderInfo.materialType),
+          productCode: this.toText(orderInfo.productCode),
+          productName: this.toText(orderInfo.productName),
+          productPlanQuantity: this.toNumber(orderInfo.plannedQuantity),
+          productUnit: this.toText(orderInfo.unit),
+          useDepartment: this.toText(orderInfo.department),
+          remark: this.toText(orderInfo.remark),
+          creator: this.toText(orderInfo.creator),
+          createDate: this.toDate(orderInfo.createDate),
+          approver: this.toText(orderInfo.approver),
+          approveDate: this.toDate(orderInfo.approveDate),
+          sequenceNumber: this.toNumber(material.sequence),
+          materialCode: this.toText(material.materialCode),
+          materialName: this.toText(material.materialName),
+          specification: this.toText(material.specification),
+          model: this.toText(material.model),
+          drawingNumber: this.toText(material.drawingNumber),
+          materialQuality: this.toText(material.material),
+          planQuantity: this.toNumber(material.quantity),
+          unit: this.toText(material.unit),
+          requiredDate: this.toDate(material.requiredDate),
+          warehouse: this.toText(material.warehouse),
+          unitUsage: this.toNumber(material.unitUsage),
+          cumulativeOutputQuantity: this.toNumber(material.cumulativeOutboundQty),
+          bomVersion: ''
+        })
+      }
+    }
+
+    return records
+  }
+
+  private toText(value: unknown): string {
+    if (value === null || value === undefined) {
+      return ''
+    }
+    return String(value).trim()
+  }
+
+  private toNumber(value: unknown): number {
+    if (value === null || value === undefined || value === '') {
+      return 0
+    }
+    const parsed = Number(value)
+    return Number.isFinite(parsed) ? parsed : 0
+  }
+
+  private toDate(value: unknown): Date {
+    if (value instanceof Date) {
+      return value
+    }
+    if (value === null || value === undefined || value === '') {
+      return new Date(NaN)
+    }
+    const parsed = new Date(String(value))
+    return parsed
+  }
+
   /**
    * Clean up temporary batch files after merging
    * @param filePaths - Array of temporary file paths to delete
@@ -458,4 +536,70 @@ export class ExtractorService {
 
     return trackedResult.result
   }
+
+  private async importRecordsToDatabaseWithLogging(
+    records: MaterialPlanRecord[],
+    onLog?: (level: LogLevel, message: string) => void,
+    archiveFilePath?: string | null
+  ): Promise<ImportResult> {
+    log.info('Starting database import from parsed records', {
+      recordCount: records.length,
+      archiveFilePath
+    })
+    onLog?.('info', `开始导入数据到数据库...`)
+
+    const trackedResult = await trackDuration(
+      async () => {
+        const importService = new DataImportService()
+
+        try {
+          const result = await importService.importFromRecords(records, 1000)
+
+          log.info('Import completed', {
+            success: result.success,
+            recordsRead: result.recordsRead,
+            recordsDeleted: result.recordsDeleted,
+            recordsImported: result.recordsImported
+          })
+
+          if (result.success) {
+            onLog?.(
+              'success',
+              `导入完成：读取 ${result.recordsRead} 条，删除 ${result.recordsDeleted} 条，导入 ${result.recordsImported} 条`
+            )
+          } else if (result.errors.length > 0) {
+            result.errors.forEach((err) => onLog?.('error', err))
+          }
+
+          return result
+        } catch (error) {
+          const errorMsg = error instanceof Error ? error.message : String(error)
+          log.error('Import failed', {
+            error: errorMsg,
+            archiveFilePath,
+            downloadDir: this.downloadDir
+          })
+          onLog?.('error', `导入失败：${errorMsg}`)
+
+          return {
+            success: false,
+            recordsRead: 0,
+            recordsDeleted: 0,
+            recordsImported: 0,
+            uniqueSourceNumbers: 0,
+            errors: [errorMsg]
+          }
+        }
+      },
+      {
+        operationName: 'Database Import',
+        context: {
+          recordCount: records.length,
+          archiveFilePath
+        }
+      }
+    )
+
+    return trackedResult.result
+  }
 }

src/main/services/erp/order-resolver.ts

@@ -32,6 +32,8 @@ const PRODUCTION_ID_PATTERN = /^\d{2}[A-Z]\d{1,6}$/i
  */
 const ORDER_NUMBER_PATTERN = /^SC\d{14}$/i
 
+const RESOLUTION_QUERY_BATCH_SIZE = 1000
+
 /**
  * Database table and field names
  * Loaded from config.yaml via ConfigManager
@@ -56,6 +58,14 @@ export class OrderNumberResolver {
     this.dbService = dbService
   }
 
+  private chunk<T>(items: T[], size: number): T[][] {
+    const chunks: T[][] = []
+    for (let index = 0; index < items.length; index += size) {
+      chunks.push(items.slice(index, index + size))
+    }
+    return chunks
+  }
+
   /**
    * Get table name based on database type
    * Converts schema.tablename format to database-specific quoting:
@@ -156,30 +166,29 @@ export class OrderNumberResolver {
       // P1: Deduplicate input productionIds to avoid redundant queries
       const uniqueProductionIds = [...new Set(productionIds)]
 
-      // Use parameterized query to prevent SQL injection
-      const placeholders = uniqueProductionIds.map((_, i) => `@p${i}`).join(', ')
-      const params = uniqueProductionIds
+      const mappings = new Map<string, string>()
+      const batches = this.chunk(uniqueProductionIds, RESOLUTION_QUERY_BATCH_SIZE)
 
+      for (const batch of batches) {
         let sql: string
+        const params = batch
+
         if (this.dbService.type === 'sqlserver') {
-        // P0: Use DISTINCT to prevent duplicates from one-to-many relationships
-        // 使用 COLLATE 指定不区分大小写的排序规则
+          const placeholders = batch.map((_, i) => `@p${i}`).join(', ')
+          // P0: Use DISTINCT to prevent duplicates from one-to-many relationships.
           sql = `SELECT DISTINCT [${dbConfig.FIELD_PRODUCTION_ID}], [${dbConfig.FIELD_ORDER_NUMBER}] FROM ${tableName} WHERE [${dbConfig.FIELD_PRODUCTION_ID}] COLLATE SQL_Latin1_General_CP1_CI_AS IN (${placeholders})`
         } else if (this.dbService.type === 'postgresql') {
-        // PostgreSQL: 使用双引号保护中文标识符，UPPER 实现不区分大小写
-        // 注意：getTableName() 已返回带双引号的表名，不应再加引号
-        const pgPlaceholders = uniqueProductionIds.map((_, i) => `UPPER($${i + 1})`).join(', ')
+          // PostgreSQL: 使用双引号保护中文标识符，UPPER 实现不区分大小写。
+          const pgPlaceholders = batch.map((_, i) => `UPPER($${i + 1})`).join(', ')
           sql = `SELECT DISTINCT "${dbConfig.FIELD_PRODUCTION_ID}", "${dbConfig.FIELD_ORDER_NUMBER}" FROM ${tableName} WHERE UPPER("${dbConfig.FIELD_PRODUCTION_ID}") IN (${pgPlaceholders})`
         } else {
-        const idPlaceholders = uniqueProductionIds.map(() => 'UPPER(?)').join(', ')
-        // P0: Use DISTINCT to prevent duplicates from one-to-many relationships
-        // MySQL: 使用 UPPER 确保不区分大小写
+          const idPlaceholders = batch.map(() => 'UPPER(?)').join(', ')
+          // MySQL: 使用 UPPER 确保不区分大小写。
           sql = `SELECT DISTINCT \`${dbConfig.FIELD_PRODUCTION_ID}\`, \`${dbConfig.FIELD_ORDER_NUMBER}\` FROM \`${tableName}\` WHERE UPPER(\`${dbConfig.FIELD_PRODUCTION_ID}\`) IN (${idPlaceholders})`
         }
 
         const result = await this.dbService.query(sql, params)
 
-      const mappings = new Map<string, string>()
         for (const row of result.rows) {
           const keys = Object.keys(row)
           const prodId = row[keys[0]] as string
@@ -188,6 +197,7 @@ export class OrderNumberResolver {
             mappings.set(prodId, orderNum)
           }
         }
+      }
 
       return mappings
     } catch (error) {
@@ -235,13 +245,14 @@ export class OrderNumberResolver {
     // Build results while preserving original input order
     // Note: Multiple productionIDs mapping to the same order number is VALID (not an error)
     const results: OrderMapping[] = []
+    const processedInputs = new Set<string>()
 
     for (const input of inputs) {
       // Skip if this exact input was already processed
-      const alreadyProcessed = results.some((r) => r.input === input)
-      if (alreadyProcessed) {
+      if (processedInputs.has(input)) {
         continue
       }
+      processedInputs.add(input)
 
       const mapping: OrderMapping = { input, resolved: false }
 

src/renderer/src/components/ExtractorOperationHistoryModal.tsx

@@ -62,12 +62,12 @@ const formatDateTime = (dateStr: string) => {
     return dateStr // Return original if invalid
   }
 
-  // Use UTC methods to display the time as stored in database (without timezone conversion)
-  const year = date.getUTCFullYear()
-  const month = String(date.getUTCMonth() + 1).padStart(2, '0')
-  const day = String(date.getUTCDate()).padStart(2, '0')
-  const hours = String(date.getUTCHours()).padStart(2, '0')
-  const minutes = String(date.getUTCMinutes()).padStart(2, '0')
+  // Use local time for display
+  const year = date.getFullYear()
+  const month = String(date.getMonth() + 1).padStart(2, '0')
+  const day = String(date.getDate()).padStart(2, '0')
+  const hours = String(date.getHours()).padStart(2, '0')
+  const minutes = String(date.getMinutes()).padStart(2, '0')
 
   return `${year}-${month}-${day} ${hours}:${minutes}`
 }

tests/unit/dialects/postgresql-dialect.test.ts

@@ -46,8 +46,8 @@ describe('PostgreSqlDialect', () => {
   })
 
   describe('currentTimestamp', () => {
-    it('should return CURRENT_TIMESTAMP', () => {
-      expect(dialect.currentTimestamp()).toBe('CURRENT_TIMESTAMP')
+    it('should return explicit UTC timestamp expression', () => {
+      expect(dialect.currentTimestamp()).toBe("(NOW() AT TIME ZONE 'UTC')")
     })
   })
 

tests/unit/services/database/discrete-material-plan-dao.test.ts

@@ -0,0 +1,104 @@
+import { describe, it, expect, beforeEach, vi } from 'vitest'
+import {
+  DiscreteMaterialPlanDAO,
+  type MaterialPlanRecord
+} from '../../../../src/main/services/database/discrete-material-plan-dao'
+import type { IDatabaseService } from '../../../../src/main/services/database'
+
+vi.mock('../../../../src/main/services/logger', () => ({
+  createLogger: vi.fn(() => ({
+    info: vi.fn(),
+    debug: vi.fn(),
+    warn: vi.fn(),
+    error: vi.fn()
+  })),
+  getRequestId: vi.fn(() => 'test-request-id'),
+  trackDuration: vi.fn(async (fn) => ({ result: await fn(), durationMs: 1, isSlow: false }))
+}))
+
+vi.mock('../../../../src/main/services/database', () => ({
+  create: vi.fn()
+}))
+
+function createRecord(sourceNumber: string, index: number): MaterialPlanRecord {
+  return {
+    factory: '工厂A',
+    materialStatus: '已审批',
+    planNumber: `PLAN-${index}`,
+    sourceNumber,
+    materialType: '标准',
+    productCode: 'P001',
+    productName: '产品A',
+    productUnit: 'PCS',
+    productPlanQuantity: 1,
+    useDepartment: '',
+    remark: '',
+    creator: '',
+    createDate: new Date('2026-04-28T00:00:00Z'),
+    approver: '',
+    approveDate: new Date('2026-04-28T00:00:00Z'),
+    sequenceNumber: index,
+    materialCode: `MAT-${index}`,
+    materialName: '物料A',
+    specification: '',
+    model: '',
+    drawingNumber: '',
+    materialQuality: '',
+    planQuantity: 1,
+    unit: 'PCS',
+    requiredDate: new Date('2026-04-28T00:00:00Z'),
+    warehouse: '',
+    unitUsage: 1,
+    cumulativeOutputQuantity: 0,
+    bomVersion: ''
+  }
+}
+
+describe('DiscreteMaterialPlanDAO', () => {
+  let mockDbService: IDatabaseService
+
+  beforeEach(async () => {
+    vi.clearAllMocks()
+    mockDbService = {
+      type: 'sqlserver',
+      connect: vi.fn(),
+      disconnect: vi.fn(),
+      isConnected: vi.fn(() => true),
+      query: vi.fn(async (_sql, params = []) => {
+        const rows = JSON.parse(params[1] || '[]')
+        return {
+          rows: [{ deletedCount: 0, insertedCount: rows.length }],
+          columns: ['deletedCount', 'insertedCount'],
+          rowCount: 1
+        }
+      }),
+      transaction: vi.fn()
+    }
+
+    const database = await import('../../../../src/main/services/database')
+    vi.mocked(database.create).mockResolvedValue(mockDbService)
+  })
+
+  it('splits SQL Server replace operations by source number batches', async () => {
+    const records = Array.from({ length: 151 }, (_, index) =>
+      createRecord(`SC-${String(index).padStart(4, '0')}`, index)
+    )
+
+    const dao = new DiscreteMaterialPlanDAO()
+    const result = await dao.replaceBySourceNumbers(records, 1000)
+
+    expect(result).toEqual({ deleted: 0, inserted: 151 })
+    expect(mockDbService.query).toHaveBeenCalledTimes(7)
+
+    const firstParams = vi.mocked(mockDbService.query).mock.calls[0][1] || []
+    const sixthParams = vi.mocked(mockDbService.query).mock.calls[5][1] || []
+    const seventhParams = vi.mocked(mockDbService.query).mock.calls[6][1] || []
+
+    expect(JSON.parse(firstParams[0])).toHaveLength(25)
+    expect(JSON.parse(sixthParams[0])).toHaveLength(25)
+    expect(JSON.parse(seventhParams[0])).toHaveLength(1)
+    expect(JSON.parse(firstParams[1])).toHaveLength(25)
+    expect(JSON.parse(sixthParams[1])).toHaveLength(25)
+    expect(JSON.parse(seventhParams[1])).toHaveLength(1)
+  })
+})

tests/unit/services/erp/extractor.test.ts

@@ -97,6 +97,14 @@ describe('ExtractorService', () => {
         recordsImported: 0,
         uniqueSourceNumbers: 0,
         errors: []
+      } as ImportResult),
+      importFromRecords: vi.fn().mockResolvedValue({
+        success: true,
+        recordsRead: 0,
+        recordsDeleted: 0,
+        recordsImported: 0,
+        uniqueSourceNumbers: 0,
+        errors: []
       } as ImportResult)
     }
 
@@ -173,6 +181,65 @@ describe('ExtractorService', () => {
 
       expect(Array.isArray(result.errors)).toBe(true)
     })
+
+    it('should import parsed records directly instead of re-reading merged Excel', async () => {
+      mockExtractorCoreInstance.downloadAllBatches.mockResolvedValue({
+        downloadedFiles: ['./file1.xlsx'],
+        errors: []
+      })
+      mockExcelParserInstance.parse = vi.fn().mockImplementation(() => {
+        mockExcelParserInstance._lastOrders = [
+          {
+            orderInfo: {
+              factory: '工厂A',
+              planNumber: 'PLAN001',
+              productionOrder: 'ORD001',
+              productCode: 'P001',
+              productName: '产品A',
+              plannedQuantity: '10',
+              unit: 'PCS'
+            },
+            materials: [
+              {
+                sequence: 1,
+                materialCode: 'MAT001',
+                materialName: '物料A',
+                quantity: 2,
+                unit: 'PCS'
+              }
+            ]
+          }
+        ]
+        return Promise.resolve()
+      })
+      mockDataImportInstance.importFromRecords.mockResolvedValue({
+        success: true,
+        recordsRead: 1,
+        recordsDeleted: 0,
+        recordsImported: 1,
+        uniqueSourceNumbers: 1,
+        errors: []
+      } as ImportResult)
+
+      const service = new ExtractorService(mockAuthService, './test-downloads')
+      vi.spyOn(service as any, 'saveMergedOrders').mockResolvedValue(undefined)
+
+      const result = await service.extract({
+        orderNumbers: ['ORD001'],
+        onProgress: vi.fn(),
+        onLog: vi.fn()
+      })
+
+      expect(result.importResult?.success).toBe(true)
+      expect(mockDataImportInstance.importFromRecords).toHaveBeenCalledTimes(1)
+      expect(mockDataImportInstance.importFromExcel).not.toHaveBeenCalled()
+      expect(mockDataImportInstance.importFromRecords.mock.calls[0][0][0]).toMatchObject({
+        planNumber: 'PLAN001',
+        sourceNumber: 'ORD001',
+        materialCode: 'MAT001',
+        planQuantity: 2
+      })
+    })
   })
 
   describe('mergeFiles()', () => {
@@ -196,6 +263,7 @@ describe('ExtractorService', () => {
       ]
 
       const service = new ExtractorService(mockAuthService, './test-downloads')
+      vi.spyOn(service as any, 'saveMergedOrders').mockResolvedValue(undefined)
 
       // @ts-ignore - accessing private method for testing
       const result = await service.mergeFiles(['./file1.xlsx'], ['ORD001'])
@@ -231,6 +299,7 @@ describe('ExtractorService', () => {
       })
 
       const service = new ExtractorService(mockAuthService, './test-downloads')
+      vi.spyOn(service as any, 'saveMergedOrders').mockResolvedValue(undefined)
 
       // @ts-ignore - accessing private method for testing
       const result = await service.mergeFiles(

tests/unit/services/erp/order-resolver.test.ts

@@ -173,6 +173,25 @@ describe('OrderNumberResolver', () => {
       // Should be optimized to query unique values only
       expect(mockDbService.query).toHaveBeenCalledTimes(1)
     })
+
+    it('splits large mapping queries into bounded batches', async () => {
+      const largeInput = Array.from({ length: 1001 }, (_, i) => `22A${i}`)
+
+      vi.mocked(mockDbService.query).mockImplementation(async (_sql, params = []) => ({
+        rows: params.map((prodId, i) => ({
+          总排号: prodId,
+          生产订单号: `SC7020260212${String(i).padStart(5, '0')}`
+        })),
+        columns: ['总排号', '生产订单号'],
+        rowCount: params.length
+      }))
+
+      await resolver.mapProductionIdsToOrderNumbers(largeInput)
+
+      expect(mockDbService.query).toHaveBeenCalledTimes(2)
+      expect(vi.mocked(mockDbService.query).mock.calls[0][1]).toHaveLength(1000)
+      expect(vi.mocked(mockDbService.query).mock.calls[1][1]).toHaveLength(1)
+    })
   })
 
   describe('error handling', () => {