Automating LOB Operations with DB2LobEditor: Scripts and Examples
Working with large objects (LOBs) in IBM DB2 can be tedious when done manually. DB2LobEditor simplifies LOB handling and can be scripted to automate repetitive tasks such as exporting, importing, updating, and validating LOB data. This guide shows practical scripts and examples to automate common LOB operations using DB2LobEditor together with DB2 command-line tools.
Prerequisites
- DB2LobEditor installed and configured.
- DB2 client or server access with appropriate privileges.
- Basic familiarity with shell scripting (bash) or Windows batch/PowerShell.
- A database table containing a LOB column (BLOB, CLOB, or DBCLOB).
Common tasks and automation patterns
Below are typical operations you’ll want to script: export LOBs to files, import LOBs from files, replace LOBs in rows, and validate integrity after operations.
1) Export LOBs to files (bulk)
Use a SQL query to list target rows, then call DB2LobEditor to export each LOB to a file.
Bash example:
#!/bin/bash
DB=“MYDB”
TABLE=“MY_SCHEMA.MY_TABLE”
KEYCOL=“ID”
LOBCOL=“MY_LOB”
OUTDIR=”./lob_exports”
mkdir -p “\(OUTDIR</span><span class="token" style="color: rgb(163, 21, 21);">"</span><span> </span><span>db2 -x </span><span class="token" style="color: rgb(163, 21, 21);">"CONNECT TO </span><span class="token" style="color: rgb(54, 172, 170);">\)DB”
# Query IDs and file names
db2 -x “SELECT \(KEYCOL</span><span class="token" style="color: rgb(163, 21, 21);"> FROM </span><span class="token" style="color: rgb(54, 172, 170);">\)TABLE WHERE ” | while read id; do
outfile=“\({OUTDIR}</span><span class="token" style="color: rgb(163, 21, 21);">/</span><span class="token" style="color: rgb(54, 172, 170);">\){TABLE##.}_\({id}</span><span class="token" style="color: rgb(163, 21, 21);">.lob"</span><span> </span><span> DB2LobEditor </span><span class="token builtin" style="color: rgb(43, 145, 175);">export</span><span> --database </span><span class="token" style="color: rgb(163, 21, 21);">"</span><span class="token" style="color: rgb(54, 172, 170);">\)DB” –table “\(TABLE</span><span class="token" style="color: rgb(163, 21, 21);">"</span><span> --keycol </span><span class="token" style="color: rgb(163, 21, 21);">"</span><span class="token" style="color: rgb(54, 172, 170);">\)KEYCOL” –keyval “\(id</span><span class="token" style="color: rgb(163, 21, 21);">"</span><span> </span><span class="token" style="color: rgb(57, 58, 52);"></span><span> </span><span> --lobcol </span><span class="token" style="color: rgb(163, 21, 21);">"</span><span class="token" style="color: rgb(54, 172, 170);">\)LOBCOL” –outfile “\(outfile</span><span class="token" style="color: rgb(163, 21, 21);">"</span><span> </span><span> </span><span class="token" style="color: rgb(0, 0, 255);">if</span><span> </span><span class="token" style="color: rgb(57, 58, 52);">[</span><span> </span><span class="token" style="color: rgb(54, 172, 170);">\)? -ne 0 ]; then
echo “Export failed for ID \(id</span><span class="token" style="color: rgb(163, 21, 21);">"</span><span> </span><span class="token" style="color: rgb(57, 58, 52);">></span><span class="token file-descriptor" style="color: rgb(238, 153, 0); font-weight: bold;">&2</span><span> </span><span> </span><span class="token" style="color: rgb(0, 0, 255);">else</span><span> </span><span> </span><span class="token builtin" style="color: rgb(43, 145, 175);">echo</span><span> </span><span class="token" style="color: rgb(163, 21, 21);">"Exported </span><span class="token" style="color: rgb(54, 172, 170);">\)id -> \(outfile</span><span class="token" style="color: rgb(163, 21, 21);">"</span><span> </span><span> </span><span class="token" style="color: rgb(0, 0, 255);">fi</span><span> </span><span></span><span class="token" style="color: rgb(0, 0, 255);">done</span><span> </span><span>db2 -x </span><span class="token" style="color: rgb(163, 21, 21);">"CONNECT RESET"</span><span> </span></code></div></div></pre> <p>Notes:</p> <ul> <li>Replace <your_condition> with a WHERE clause as needed.</li> <li>Adjust DB2LobEditor command-line flags to match your installed version.</li> </ul> <h3>2) Import LOBs from files (bulk)</h3> <p>Importing can mirror the export process. Match files to rows using a naming convention.</p> <p>Bash example:</p> <pre><div class="XG2rBS5V967VhGTCEN1k"><div class="nHykNMmtaaTJMjgzStID"><div class="HsT0RHFbNELC00WicOi8"><i><svg width="16" height="16" fill="none" xmlns="http://www.w3.org/2000/svg"><path fill="currentColor" fill-rule="evenodd" clip-rule="evenodd" d="M15.434 7.51c.137.137.212.311.212.49a.694.694 0 0 1-.212.5l-3.54 3.5a.893.893 0 0 1-.277.18 1.024 1.024 0 0 1-.684.038.945.945 0 0 1-.302-.148.787.787 0 0 1-.213-.234.652.652 0 0 1-.045-.58.74.74 0 0 1 .175-.256l3.045-3-3.045-3a.69.69 0 0 1-.22-.55.723.723 0 0 1 .303-.52 1 1 0 0 1 .648-.186.962.962 0 0 1 .614.256l3.541 3.51Zm-12.281 0A.695.695 0 0 0 2.94 8a.694.694 0 0 0 .213.5l3.54 3.5a.893.893 0 0 0 .277.18 1.024 1.024 0 0 0 .684.038.945.945 0 0 0 .302-.148.788.788 0 0 0 .213-.234.651.651 0 0 0 .045-.58.74.74 0 0 0-.175-.256L4.994 8l3.045-3a.69.69 0 0 0 .22-.55.723.723 0 0 0-.303-.52 1 1 0 0 0-.648-.186.962.962 0 0 0-.615.256l-3.54 3.51Z"></path></svg></i><p class="li3asHIMe05JPmtJCytG wZ4JdaHxSAhGy1HoNVja cPy9QU4brI7VQXFNPEvF">bash</p></div><div class="CF2lgtGWtYUYmTULoX44"><button type="button" class="st68fcLUUT0dNcuLLB2_ ffON2NH02oMAcqyoh2UU MQCbz04ET5EljRmK3YpQ CPXAhl7VTkj2dHDyAYAf" data-copycode="true" role="button" aria-label="Copy Code"><svg viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg"><path fill="currentColor" fill-rule="evenodd" clip-rule="evenodd" d="M9.975 1h.09a3.2 3.2 0 0 1 3.202 3.201v1.924a.754.754 0 0 1-.017.16l1.23 1.353A2 2 0 0 1 15 8.983V14a2 2 0 0 1-2 2H8a2 2 0 0 1-1.733-1H4.183a3.201 3.201 0 0 1-3.2-3.201V4.201a3.2 3.2 0 0 1 3.04-3.197A1.25 1.25 0 0 1 5.25 0h3.5c.604 0 1.109.43 1.225 1ZM4.249 2.5h-.066a1.7 1.7 0 0 0-1.7 1.701v7.598c0 .94.761 1.701 1.7 1.701H6V7a2 2 0 0 1 2-2h3.197c.195 0 .387.028.57.083v-.882A1.7 1.7 0 0 0 10.066 2.5H9.75c-.228.304-.591.5-1 .5h-3.5c-.41 0-.772-.196-1-.5ZM5 1.75v-.5A.25.25 0 0 1 5.25 1h3.5a.25.25 0 0 1 .25.25v.5a.25.25 0 0 1-.25.25h-3.5A.25.25 0 0 1 5 1.75ZM7.5 7a.5.5 0 0 1 .5-.5h3V9a1 1 0 0 0 1 1h1.5v4a.5.5 0 0 1-.5.5H8a.5.5 0 0 1-.5-.5V7Zm6 2v-.017a.5.5 0 0 0-.13-.336L12 7.14V9h1.5Z"></path></svg>Copy Code</button><button type="button" class="st68fcLUUT0dNcuLLB2_ WtfzoAXPoZC2mMqcexgL ffON2NH02oMAcqyoh2UU MQCbz04ET5EljRmK3YpQ GnLX_jUB3Jn3idluie7R"><svg fill="none" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><path fill="currentColor" fill-rule="evenodd" d="M20.618 4.214a1 1 0 0 1 .168 1.404l-11 14a1 1 0 0 1-1.554.022l-5-6a1 1 0 0 1 1.536-1.28l4.21 5.05L19.213 4.382a1 1 0 0 1 1.404-.168Z" clip-rule="evenodd"></path></svg>Copied</button></div></div><div class="mtDfw7oSa1WexjXyzs9y" style="color: var(--sds-color-text-01); font-family: var(--sds-font-family-monospace); direction: ltr; text-align: left; white-space: pre; word-spacing: normal; word-break: normal; font-size: var(--sds-font-size-label); line-height: 1.2em; tab-size: 4; hyphens: none; padding: var(--sds-space-x02, 8px) var(--sds-space-x04, 16px) var(--sds-space-x04, 16px); margin: 0px; overflow: auto; border: none; background: transparent;"><code class="language-bash" style="color: rgb(57, 58, 52); font-family: Consolas, "Bitstream Vera Sans Mono", "Courier New", Courier, monospace; direction: ltr; text-align: left; white-space: pre; word-spacing: normal; word-break: normal; font-size: 0.9em; line-height: 1.2em; tab-size: 4; hyphens: none;"><span class="token shebang" style="color: rgb(238, 153, 0); font-weight: bold;">#!/bin/bash</span><span> </span><span></span><span class="token assign-left" style="color: rgb(54, 172, 170);">DB</span><span class="token" style="color: rgb(57, 58, 52);">=</span><span class="token" style="color: rgb(163, 21, 21);">"MYDB"</span><span> </span><span></span><span class="token assign-left" style="color: rgb(54, 172, 170);">TABLE</span><span class="token" style="color: rgb(57, 58, 52);">=</span><span class="token" style="color: rgb(163, 21, 21);">"MY_SCHEMA.MY_TABLE"</span><span> </span><span></span><span class="token assign-left" style="color: rgb(54, 172, 170);">KEYCOL</span><span class="token" style="color: rgb(57, 58, 52);">=</span><span class="token" style="color: rgb(163, 21, 21);">"ID"</span><span> </span><span></span><span class="token assign-left" style="color: rgb(54, 172, 170);">LOBCOL</span><span class="token" style="color: rgb(57, 58, 52);">=</span><span class="token" style="color: rgb(163, 21, 21);">"MY_LOB"</span><span> </span><span></span><span class="token assign-left" style="color: rgb(54, 172, 170);">INDIR</span><span class="token" style="color: rgb(57, 58, 52);">=</span><span class="token" style="color: rgb(163, 21, 21);">"./lob_imports"</span><span> </span> <span>db2 -x </span><span class="token" style="color: rgb(163, 21, 21);">"CONNECT TO </span><span class="token" style="color: rgb(54, 172, 170);">\)DB”
for f in “$INDIR”/.lob; do
# assume filename pattern: MYTABLE.lob
id=\((</span><span class="token" style="color: rgb(57, 58, 52);">basename</span><span class="token" style="color: rgb(54, 172, 170);"> </span><span class="token" style="color: rgb(163, 21, 21);">"</span><span class="token" style="color: rgb(163, 21, 21);">\)f“ | sed -E ’s/^[^.]+([0-9]+).lob\(//'</span><span class="token" style="color: rgb(54, 172, 170);">)</span><span> </span><span> DB2LobEditor </span><span class="token" style="color: rgb(57, 58, 52);">import</span><span> --database </span><span class="token" style="color: rgb(163, 21, 21);">"</span><span class="token" style="color: rgb(54, 172, 170);">\)DB” –table “\(TABLE</span><span class="token" style="color: rgb(163, 21, 21);">"</span><span> --keycol </span><span class="token" style="color: rgb(163, 21, 21);">"</span><span class="token" style="color: rgb(54, 172, 170);">\)KEYCOL” –keyval “\(id</span><span class="token" style="color: rgb(163, 21, 21);">"</span><span> </span><span class="token" style="color: rgb(57, 58, 52);"></span><span> </span><span> --lobcol </span><span class="token" style="color: rgb(163, 21, 21);">"</span><span class="token" style="color: rgb(54, 172, 170);">\)LOBCOL” –infile “\(f</span><span class="token" style="color: rgb(163, 21, 21);">"</span><span> </span><span> </span><span class="token" style="color: rgb(0, 0, 255);">if</span><span> </span><span class="token" style="color: rgb(57, 58, 52);">[</span><span> </span><span class="token" style="color: rgb(54, 172, 170);">\)? -ne 0 ]; then
echo “Import failed for \(f</span><span class="token" style="color: rgb(163, 21, 21);">"</span><span> </span><span class="token" style="color: rgb(57, 58, 52);">></span><span class="token file-descriptor" style="color: rgb(238, 153, 0); font-weight: bold;">&2</span><span> </span><span> </span><span class="token" style="color: rgb(0, 0, 255);">else</span><span> </span><span> </span><span class="token builtin" style="color: rgb(43, 145, 175);">echo</span><span> </span><span class="token" style="color: rgb(163, 21, 21);">"Imported </span><span class="token" style="color: rgb(54, 172, 170);">\)f -> ID \(id</span><span class="token" style="color: rgb(163, 21, 21);">"</span><span> </span><span> </span><span class="token" style="color: rgb(0, 0, 255);">fi</span><span> </span><span></span><span class="token" style="color: rgb(0, 0, 255);">done</span><span> </span><span>db2 -x </span><span class="token" style="color: rgb(163, 21, 21);">"CONNECT RESET"</span><span> </span></code></div></div></pre> <h3>3) Replace LOB content for many rows (update from directory)</h3> <p>If you need to update multiple rows where each row’s LOB comes from a file, combine the above patterns and use transactions to ensure consistency.</p> <p>Bash with transaction control: ```bash db2 -x "CONNECT TO \)DB” db2 -x “BEGIN WORK” for f in “\(INDIR"/*.lob; do>(basename “$f” | sed -E ’s/^[^.]+([0-9]+).lob\(//') DB2LobEditor import --database "\)DB” –table “\(TABLE" --keycol "\)KEYCOL” –keyval “\(id" --lobcol "\)LOBCOL” –infile “\(f" [ \)? -ne
Rapid File Renamer: Rename Hundreds of Files in Seconds
Rapid File Renamer is a batch renaming tool designed to quickly and reliably rename large numbers of files using customizable rules. It’s aimed at users who need to organize, standardize, or prepare files (photos, documents, music, datasets) without manually editing filenames.
Key features
- Batch processing: Apply renaming rules to hundreds or thousands of files at once.
- Rule-based renaming: Use templates, find-and-replace, numbering sequences, date/time tokens, and metadata (EXIF, ID3) to build complex rename patterns.
- Preview mode: See a live before/after preview of renamed files to avoid mistakes.
- Undo support: Revert changes if a batch rename produced undesired results.
- Filter and selection: Include/exclude files by extension, size, date, or regex patterns.
- Safe operations: Option to simulate changes or write to a new folder to prevent data loss.
- Cross-platform support: Available for Windows and macOS (version availability may vary).
- Keyboard shortcuts and drag-and-drop: Streamline workflows with quick file import and command shortcuts.
Common use cases
- Renaming photos from cameras or phones using date/time and sequence numbers.
- Converting inconsistent document names into a standardized company format.
- Updating music filenames/tags using ID3 metadata.
- Preparing datasets where filenames must follow strict naming conventions.
Example workflow
- Add the folder containing your files.
- Choose rules (e.g., “DateTaken_####.jpg” or “ProjectNameChapter##.docx”).
- Preview results and adjust rules or filters.
- Execute the rename; use Undo if needed.
Tips
- Test on a small sample first using preview/simulation.
- Use metadata tokens (EXIF/ID3) for reliable photo/music renames.
- Combine regex with find-and-replace for advanced pattern adjustments.
If you want, I can write sample rename rules for a specific file type (photos, music, documents) or draft instructions for Windows or macOS—tell me which.
Advanced Typography Techniques in Affinity Publisher
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Enable optical margin alignment to pull punctuation and thin strokes slightly outside the text block so edges look visually straight. Useful for display text and block quotes.
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Snap text to a baseline grid for consistent line heights across columns and threaded frames. Prefer optical leading (tighten for display text, loosen for long copy).
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Quick Workflow Tips
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- Toggle Preflight to find missing fonts and overset text.
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