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These routines are used to retrieve rows of query results and to specify the application program data areas that are to receive the returned query results.
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/* Advance the cursor to the next row of query results */ short SQLFetch ( long stmtHdl) /* IN: statement handle */
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/* Scroll the cursor up or down through the query results */ short SQLFetchScroll ( long stmtHdl, /* IN: statement handle */ short fetchdir, /* IN: direction (first/next/prev) */ long offset) /* IN: offset (number of rows) */ /* Get the data for a single column of query results */ short SQLGetData ( long stmtHdl, /* IN: statement handle */ short colnr, /* IN: column number to be retrieved */ short tgttype, /* IN: data type to return to program */ void *value, /* IN: ptr to buffer for column data */ long buflen, /* IN: length of program buffer */ long *lenind) /* OUT: actual length and/or NULL ind */ /* Close a cursor to end access to query results */ short SQLCloseCursor ( long stmtHdl) /* IN: statement handle */ /* Establish a cursor name for an open cursor */ short SQLSetCursorName ( long stmtHdl, /* IN: statement handle */ char cursname, /* IN: name for cursor */ short namelen) /* IN: length of cursor name */ /* Retrieve the name of an open cursor */ short SQLGetCursorName ( long stmtHdl, /* IN: statement handle */ char cursname, /* OUT: buffer for returned name */ short buflen, /* IN: length of buffer */ short *namlen) /* OUT: actual length of returned name */ /* Bind a query results column short SQLBindCol ( long stmtHdl, /* short colnr, /* short tgttype, /* void value, /* long buflen, /* long lenind) /* to a program data area */ IN: IN: IN: IN: IN: IN: statement handle */ column number to be bound */ data type of program data area */ pointer to program data area */ length of program buffer */ ptr to length/indicator buffer */
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Query Results Description Routines
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These routines are used to obtain a description of the results of a query, including the number of columns of query results, the data type, and other attributes of each column.
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/* Determine the number of result columns in a query */ short SQLNumResultCols ( long stmtHdl, /* IN: statement handle */ short *colcount) /* OUT: returned number of columns */ /* Determine the characteristics of a column of query results */ short SQLDescribeCol ( long stmtHdl, /* IN: statement handle */ short colnr, /* IN: number of column to describe */ char *colname, /* OUT: name of query results column */ short buflen, /* IN: length of column name buffer */ short *namlen, /* OUT: actual column name length */ short *coltype, /* OUT: returned column data type code */ short *colsize, /* OUT: returned column data length */ short *decdigits, /* OUT: returned # digits in column */ short *nullable) /* OUT: can column have NULL values */ /* Obtain detailed info about short SQLColAttribute ( long stmtHdl, /* short colnr, /* short attrcode, /* char *attrinfo, /* short buflen, /* short *actlen) /* a column of query results */ IN: IN: IN: OUT: IN: OUT: statement handle */ number of column to describe */ code of attribute to retrieve */ buffer for attribute info */ length of col attribute buffer */ actual attribute info length */
Query Results Descriptor Management Routines
These routines are used to obtain a description of the results of a query using the CLI descriptor mechanism, and to manipulate the descriptors to manage the return of query results into application program data areas.
/* Retrieve frequently used short SQLGetDescRec ( long descHdl, short recnr, char *name, short buflen, info from a CLI descriptor */ /* /* /* /* IN: IN: OUT: IN: descriptor handle */ descriptor record number */ name of item being described */ length of name buffer */
Appendix D:
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