Null Indicator In DB2. Quick References. View previous topic :: View next topic. Posted: Thu Jan 10, pm. Hi All, 1 Can anyone explain null indicator in DB2. Will I be using Cursor Declare,open,fetch and close, is this fine. Back to top. Hi Kumar, Null indicator variables are used in DB2 to - 1. Retrieve null values in case the coulmn is not defined in the table definition as NOT NULL, then it may contain nulls for some records.
In such case, we should provide Indicatior variable for this column field. For error handling to detect arithmetic expression errors and data conversion errors DCLGEN has a feature that generates the indicator host structure automatically.
Any -ve value in indicator variable indicates null value in the corresponding host variable. A variable of -2 indicates arithmetic expression errors and data conversion errors. Thanks, Ajay. You don't need a cursor if you just want to delete rows Code:.
Posted: Fri Jan 11, pm. It could be a combination of these two situations too. Meaning: -1 : the field is null 0 : the field is not null -2 : the field value is truncated. Every column defined to a DB2 table must be designated as either allowing or disallowing nulls.
Null is the default if nothing is specified after the column name. What is a db2 plan and package? An application plan relates an application process to a local instance of DB2 and specifies processing options. You can think of the control structures as the bound or operational form of SQL statements. Is null or coalesce? What is coalesce in SQL? How does coalesce work? During the expression evaluation process the NULL values are replaced with the user-defined value.
The SQL Coalesce function evaluates the arguments in order and always returns first non-null value from the defined argument list. What city in France has the highest population?
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