get_blob

Use the get_blob v4 API method to return a blob object from a specified column.

Declaration

 short get_blob(
a_v4_extfn_table_context *cntxt,
a_v4_extfn_column_data *col,
a_v4_extfn_blob **blob
)

Usage

The blob is returned as an output parameter and is owned by the caller. Call this method only on a column that contains a blob.

Use the helper macro EXTFN_COL_IS_BLOB to determine whether a column contains a blob. This is the declaration of EXTFN_COL_IS_BLOB in the header file extfnapiv4.h:

 #define EXTFN_COL_IS_BLOB(c, n)		(c[n].blob_handle != NULL)

Parameters

Parameter	Description
cntxt	The table context object
col	The column data pointer for which to get the blob
blob	On success, contains the blob object associated with the column

Returns

1 if successful, 0 otherwise.