Purpose
Returns the value of the specified name in the current query band or NULL.
Definition
REPLACE FUNCTION SYSLIB.GetQueryBandValue
(SearchType SMALLINT,
QBName TD_ANYTYPE
)
RETURNS VARCHAR (257)CHARACTER SET UNICODE
.
.
.
;
REPLACE FUNCTION SYSLIB.GetQueryBandValue
(QueryBandIn TD_ANYTYPE,
SearchType SMALLINT,
QBName TD_ANYTYPE
)
RETURNS VARCHAR (257)CHARACTER SET UNICODE
.
.
.
;
Input Parameters
| Input Parameter | Description |
|---|---|
| QueryBandIn | A query band string or NULL. |
| SearchType | 0 = Return the value of the first name-value pair where name is specified by the QBName input argument. If the query band contains the name-value pairs for the transaction and session, the function searches the transaction name-value pairs first. 1= Search the transaction name-value pairs in the query band and return the value that corresponds to the name specified by the QBName input parameter. 2 = Search the session name-value pairs in the query band and return the value that corresponds to the name specified by the QBName input parameter. 3 = Search the profile name-value pairs in the query band and return the value that corresponds to the name specified by the QBName input parameter. |
| QBName | Name in the query band pair to search for. |
Usage Notes
The GetQueryBandValue functions are two overloaded functions. One requires the query band string to be passed in; the other uses internal calls to retrieve the query band.
You can use these functions to query the DBC.DBQLogTbl table based on the names and values specified in the QueryBand column.
Both functions are created in the SYSLIB database by the DEM DIP script. EXECUTE privileges are granted to PUBLIC by default. For more information, see Requirements for Using the API.
Output Parameter
This function returns the value of the specified name in the query band or NULL. If no matches are found, the return value is an empty string or NULL.
Example: Using GetQueryBandValue to Query the QueryBand Column in QryLogV
This example shows you how to query the DBC.DBQLogTbl table for all Teradata brands specified in the QueryBand column.
SELECT t1.queryband(FORMAT 'X(50)') FROM
dbc.qrylogv t1
WHERE GetQueryBandValue(t1.queryband, 0, 'brand') = 'teradata'
AND username='qbuser' ORDER BY t1.queryid;
Result:
QueryBand -------------------------------------------------- =T> game=monopoly;brand=teradata; =T> game=monopoly;brand=teradata; =T> game=monopoly;brand=teradata; =T> game=monopoly;brand=teradata;
Example: Using GetQueryBandValue to Query DBQLogTbl (QryLogV)
This example shows how to query the DBC.DBQLogTbl table for all cat names specified in the QueryBand column.
SEL GetQueryBandValue(t1.queryband, 0, 'cat') FROM
dbc.qrylogv t1 where
GetQueryBandValue(t1.queryband, 0, 'CAT') IS NOT NULL
AND username='qbuser' ORDER BY t1.queryid;
Result:
GetQueryBandValue(QueryBand,0,'cat') ------------------------------------------------------------------------ asta asta asta asta asta asta asta sabella sabella sabella sabella sabella sabella sabella sabella sabella sabella sabella sabella