SQL0407N when trying to insert an empty string in to a NOT NULL column

Troubleshooting

Problem

An empty string is not a NULL value in DB2, but getting the follwing error during insert of an empty string into a NOT NULL column. SQL0407N Assignment of a NULL value to a NOT NULL column "TBSPACEID=2, TABLEID=5, COLNO=0" is not allowed. SQLSTATE=23502

Symptom

C:>db2 "create table t2(col1 varchar(20) not null)"
DB20000I The SQL command completed successfully.

C:>db2 "insert into t2 values('')"
DB21034E The command was processed as an SQL statement because it was not a valid Command Line Processor command. During SQL processing it returned:
SQL0407N Assignment of a NULL value to a NOT NULL column "TBSPACEID=2,TABLEID=5, COLNO=0" is not allowed. SQLSTATE=23502

[{"Product":{"code":"SSEPGG","label":"Db2 for Linux, UNIX and Windows"},"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Component":"Routines (SP \u0026 UDF) - SQL","Platform":[{"code":"PF002","label":"AIX"},{"code":"PF010","label":"HP-UX"},{"code":"PF016","label":"Linux"},{"code":"PF027","label":"Solaris"},{"code":"PF033","label":"Windows"}],"Version":"9.7;9.5;10.1;10.5;11.1","Edition":"","Line of Business":{"code":"LOB10","label":"Data and AI"}}]

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Document Information

More support for:
Db2 for Linux, UNIX and Windows

Software version:
9.7, 9.5, 10.1, 10.5, 11.1

Operating system(s):
AIX, HP-UX, Linux, Solaris, Windows

Document number:
518745

Modified date:
01 May 2025

UID

swg21689789

IBM Support

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