Sun Microsystems Sun StorageTek 5800 - Manual (Page 109)

hc_pstmt_query_ez
Retrieves OIDs and optionally name-value records matching a prepared statement.
Synopsis
hcerr_t hc_pstmt_query_ez(*pstmt,hc_string_t selects[],
int n_selects,
int results_per_fetch,
hc_query_result_set_t **rsetp);
Description
This function retrieves OIDs and optionally name-value records matching a prepared
statement.
“hc_qrs_next_ez” on page 96 is used to access the results in the result set. If the
selects list is NULL, only OIDs are retrieved. If selects is not NULL, name-value records are
also retrieved and should each be freed using “hc_nvr_free” on page 66 . In both cases the result
set should be freed using “hc_qrs_free” on page 99 .
Note – When a query is incorrect and elicits an error from the server, the error is often reported
after “hc_qrs_free” on page 99 and not from “hc_pstmt_query_ez” on page 109 . Your
application should be prepared to receive and report an error from either place.
Parameters
pstmt
IN: Prepared statement generated by “hc_pstmt_create” on page 100 .
selects
IN: Points to an array of “hc_string_t” on page 46 , each of which is the name of a field to
retrieve from the metadata (select clause). Set to NULL to only retrieve OIDs matching the
query.
n_selects
IN: The number of items in the select clause.
results_per_fetch
IN: The number of results per internal fetch.
rsetp
OUT: Updated to point to the new result set. See “hc_query_result_set_t” on page 49 .
Synchronous C API Functions
Chapter 3 • Sun StorageTek 5800 System C Client API 109