Batch import JSON into DB2 CLOB

Want to batch import JSON documents into DB2 CLOB column?

Try Withdata DBBlobEditor, a DB2 CLOB editor, Bulk import JSON into DB2, East and Fast.

Can run in GUI mode, just a few mouse clicks.
Can run in Command line, for Scheduled Tasks and Streams.
Support Windows, Linux, and macOS.

Download DBBlobEditor

Batch import JSON documents to DB2 CLOB column

Run DBBlobEditor, login to DB2.

Batch import json files into DB2 CLOB - login to DB2

Click “Start New Task – Import LOB From Files” at task dialog.

Batch import json files into DB2 CLOB - Task Window

then show the wizard.

1. Configure import JSON settings.

Batch insert json files into DB2 CLOB - config

2. Bulk import JSON files to DB2 CLOB.

Batch save json files into DB2 CLOB - import

then you can see importing results

Batch import json files into DB2 CLOB - view

More about DB2 CLOB importer

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JSON → DB2 reference

Type mapping

Value kind	in JSON	in DB2
Int	`1234 (number)`	`INTEGER`
Bigint	`9007199254740993`	`BIGINT`
Decimal	`1234.56 (number)`	`DECIMAL(p,s)`
Float	`1.234e10 (number)`	`DOUBLE`
Text	`"text" (string)`	`VARCHAR(n)`
Long text	`"multi-line\ntext" (escaped newline inside a string)`	`CLOB`
Date	`"2026-09-18" (string)`	`DATE`
Datetime	`"2026-09-18T14:30:00Z" (string)`	`TIMESTAMP`
Binary	`"base64:..." (string)`	`BLOB`
Boolean	`true / false (boolean)`	`SMALLINT`
JSON	`nested object or array, kept as structure`	`CLOB`

Dialect differences

JSON is a file format and DB2 is a database server, so the target has to be told the types the file never carried – the rows below are where the two sides diverge.

Property	in JSON	in DB2
port	`—`	`50000`
identifiers	`Double quotes; backslash escapes`	`"double quotes"`
row limit	`—`	`FETCH FIRST n ROWS`
dates	`No date type: dates arrive as strings and the reader must p...`	`DATE, TIME, TIMESTAMP`
long text	`—`	`CLOB`
binary	`Not supported natively - base64 inside a string`	`BLOB`
separator	`Braces and commas`	`—`
encoding	`UTF-8 by definition`	`—`
typing	`string, number, boolean, null, object, array - no date type`	`—`
shape	`Nested objects and arrays`	`Tables of rows and columns`
ceiling	`Whole document is usually parsed into memory`	`—`

Command line

Side	Command
DB2	`EXPORT TO out.csv OF DEL`
DB2 (load)	`db2 IMPORT FROM file OF DEL`

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