Oracle教程 2023-05-17

使用GDB实现Oracle数据库的快速导入（gdb导入到oracle）

使用GDB实现Oracle数据库的快速导入

随着数据量的不断增长，数据库的导入操作变得越来越繁琐和耗时，这对于一些需要大量数据的应用程序来说是非常重要的，如何在数据库导入时节省时间和提高效率成为了许多数据库管理员的考虑。本文将介绍使用GDB（GNU调试器）实现Oracle数据库的快速导入。

GDB是一个功能强大的调试器，它可以用于调试多种编程语言，如C，C++，Objective-C等。在本文中，我们将使用GDB为数据导入操作添加调试器，以减少导入过程中的错误和调试时间。

需要安装GDB。对于基于Linux的系统，可以使用以下命令安装：

sudo apt-get install gdb

对于基于Windows的系统，可以从GDB的官方网站（https://www.gnu.org/software/gdb/）下载并安装。

接下来，创建一个名为“gdb_import.sh”的脚本以调用GDB并导入数据库。

#!/bin/bash
# Set the name of the Oracle database and the user ID for importing data
DBNAME=MY_DATABASE
DBUSER=MY_USERNAME

# Set the path of the data file to be imported
DATAFILE=/path/to/my/datafile.dat
# Set the path of the control file
CONTROLFILE=/path/to/my/controlfile.ctl
# Set the path of the log file
LOGFILE=/path/to/my/logfile.log
# Set the size of the log buffer
LOG_BUFFER_SIZE=65536
# Call gdb with the oracle executable
gdb -ex "set args \"${DBNAME}\" \"${DBUSER}\" \"${DATAFILE}\" \"${CONTROLFILE}\" \"${LOGFILE}\" ${LOG_BUFFER_SIZE}" --batch --command=gdb_import.commands /path/to/my/oracle/bin/oracle

在脚本中，设置了数据库的名称和用户ID，并指定要导入的数据文件，控制文件和日志文件的路径。通过调用GDB并传递参数来运行Oracle可执行文件，“–batch”选项用于在调试器中自动运行命令，“–command”选项用于指定调试器脚本的位置。

接下来，需要创建一个名为“gdb_import.commands”的文件来在GDB中执行用户命令。

set breakpoint pending on
break mn
commands
  set $enable_logging = (bool) 0
  set $timeout_val = (int) -1
  set $heap_size = (unsigned long) 67108864
  set $max_data_files = (int) 20
  set $nls_date_format = (char *) "YYYY-MM-DD HH24:MI:SS"
  set $nls_timestamp_format = (char *) "YYYY-MM-DD HH24:MI:SS.FF"
  set $skip_unusable_indexes = (bool) 1
  set $skip_index_mntenance = (bool) 1
  set $commit_rows = (int) 1000
  set $commit_wt = (int) 10000
  set $log_buffer_size = (unsigned int) $arg6
  set $loader_logging_interval = (int) 0
  set $loader_error_skip_count = (int) 0
  set $loader_max_errors = (int) 50
  set $loader_skip_unusable_indexes = (bool) 1
  set $loader_skip_index_mntenance = (bool) 1
  set $loader_rows_per_batch = (int) 10000
  set $loader_readsize = (unsigned long) 524288
  set $loader_multithreading = (bool) 1
  set $loader_diagnostic_events = (bool) 0
  set $loader_blocksize = (int) 8192
  set $loader_cache_size = (int) 640
  set $loader_write_size = (int) 65536
  set $loader_write_threads = (int) 32
  set $loader_direct_io = (bool) 0
  set $loader_direct_io_buffer_size = (unsigned long) 1048576
  set $loader_compress_temporary_segments = (bool) 0
  set $loader_special_handling = (bool) 1
  set $loader_object_handling = (bool) 1
  set $loader_skip_constrnts = (bool) 0
  set $loader_skip_redo_logs = (bool) 0
  
  set $heap_size_arg = malloc(strlen("$HEAP_SIZE ") + strlen((char *) $heap_size) + 1);
  sprintf($heap_size_arg, "$HEAP_SIZE %lu", $heap_size);
  set $max_data_files_arg = malloc(strlen("$MAX_DATA_FILES ") + strlen((char *) $max_data_files) + 1);
  sprintf($max_data_files_arg, "$MAX_DATA_FILES %d", $max_data_files);
  set $commit_rows_arg = malloc(strlen("$COMMIT_ROWS ") + strlen((char *) $commit_rows) + 1);
  sprintf($commit_rows_arg, "$COMMIT_ROWS %d", $commit_rows);
  set $commit_wt_arg = malloc(strlen("$COMMIT_WT ") + strlen((char *) $commit_wt) + 1);
  sprintf($commit_wt_arg, "$COMMIT_WT %d", $commit_wt);
  set $log_buffer_size_arg = malloc(strlen("$LOG_BUFFER_SIZE ") + strlen((char *) $log_buffer_size) + 1);
  sprintf($log_buffer_size_arg, "$LOG_BUFFER_SIZE %u", $log_buffer_size);
  set $loader_rows_per_batch_arg = malloc(strlen("$LOADER_ROWS_PER_BATCH ") + strlen((char *) $loader_rows_per_batch) + 1);
  sprintf($loader_rows_per_batch_arg, "$LOADER_ROWS_PER_BATCH %d", $loader_rows_per_batch);
  set $loader_readsize_arg = malloc(strlen("$LOADER_READSIZE ") + strlen((char *) $loader_readsize) + 1);
  sprintf($loader_readsize_arg, "$LOADER_READSIZE %lu", $loader_readsize);
  set $loader_blocksize_arg = malloc(strlen("$LOADER_BLOCKSIZE ") + strlen((char *) $loader_blocksize) + 1);
  sprintf($loader_blocksize_arg, "$LOADER_BLOCKSIZE %d", $loader_blocksize);
  set $loader_cache_size_arg = malloc(strlen("$LOADER_CACHE_SIZE ") + strlen((char *) $loader_cache_size) + 1);
  sprintf($loader_cache_size_arg, "$LOADER_CACHE_SIZE %d", $loader_cache_size);
  set $loader_write_size_arg = malloc(strlen("$LOADER_WRITE_SIZE ") + strlen((char *) $loader_write_size) + 1);
  sprintf($loader_write_size_arg, "$LOADER_WRITE_SIZE %d", $loader_write_size);
  set $loader_write_threads_arg = malloc(strlen("$LOADER_WRITE_THREADS ") + strlen((char *) $loader_write_threads) + 1);
  sprintf($loader_write_threads_arg, "$LOADER_WRITE_THREADS %d", $loader_write_threads);
  set $loader_direct_io_buffer_size_arg = malloc(strlen("$LOADER_DIRECT_IO_BUFFER_SIZE ") + strlen((char *) $loader_direct_io_buffer_size) + 1);
  sprintf($loader_direct_io_buffer_size_arg, "$LOADER_DIRECT_IO_BUFFER_SIZE %lu", $loader_direct_io_buffer_size);
  set environment $heap_size_arg
  set environment "$MAX_DATA_FILES $max_data_files_arg"
  set environment "$NLS_TIMESTAMP_FORMAT $nls_timestamp_format"
  set environment "$SKIP_UNUSABLE_INDEXES $skip_unusable_indexes"
  set environment "$SKIP_INDEX_MNTENANCE $skip_index_mntenance"
  set environment "$COMMIT_ROWS $commit_rows_arg"
  set environment "$COMMIT_WT $commit_wt_arg"
  set environment "$LOADER_LOGGING_INTERVAL $loader_logging_interval"
  set environment "$LOADER_ERROR_SKIP_COUNT $loader_error_skip_count"
  set environment "$LOADER_MAX_ERRORS $loader_max_errors"
  set environment "$LOADER_SKIP_UNUSABLE_INDEXES $loader_skip_unusable_indexes"
  set environment "$LOADER_SKIP_INDEX_MNTENANCE $loader_skip_index_mntenance"
  set environment "$LOADER_ROWS_PER_BATCH $loader_rows_per_batch_arg"
  set environment "$LOADER_READSIZE $loader_readsize_arg"
  set environment "$LOADER_MULTITHREADING $loader_multithreading"
  set environment "$LOADER_DIAGNOSTIC_EVENTS $loader_diagnostic_events"
  set environment "$LOADER_BLOCKSIZE $loader_blocksize_arg"
  set environment "$LOADER_CACHE_SIZE $loader_cache_size_arg"
  set environment "$LOADER_WRITE_SIZE $loader_write_size_arg"
  set environment "$LOADER_WRITE_THREADS $loader_write_threads_arg"
  set environment "$LOADER_DIRECT_IO $loader_direct_io"
  set environment "$LOADER_DIRECT_IO_BUFFER_SIZE $loader_direct_io_buffer_size_arg"
  set environment "$LOADER_COMPRESS_TEMPORARY_SEGMENTS $loader_compress_temporary_segments"
  set environment "$LOADER_SPECIAL_HANDLING $loader_special_handling"
  set environment "$LOADER_OBJECT_HANDLING $loader_object_handling"
  set environment "$LOADER_SKIP_CONSTRNTS $loader_skip_constrnts"
  set environment "$

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