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- // BDE - (C) Copyright 1995 by Borland International
-
- // idxpdox.c
- #include "snipit.h"
-
- #define NAMELEN 10 // The length of the name fields.
- #define PLACELEN 20 // The length of the POB field.
- #define DATELEN 11 // The display length of a date field: mm\dd\yyyy.
-
- static const char szTblName[] = "People";
- static const char szTblType[] = szPARADOX;
-
- // Field descriptor used in creating a table.
- static SNIPFAR FLDDesc fldDesc[] = {
- { // Field 1 - First Name
- 1, // Field number
- "First Name", // Field name
- fldZSTRING, // Field type
- fldUNKNOWN, // Field subtype
- NAMELEN, // Field size ( 1 or 0, except
- // BLOB or CHAR field )
- 0, // Decimal places ( 0 )
- // computed
- 0, // Offset in record ( 0 )
- 0, // Length in bytes ( 0 )
- 0, // For NULL bits ( 0 )
- fldvNOCHECKS, // Validity checks ( 0 )
- fldrREADWRITE // Rights
- },
- { // Field 2 - Middle Name
- 2, "Middle Name", fldZSTRING, fldUNKNOWN,
- NAMELEN, 0, 0, 0, 0,
- fldvNOCHECKS, fldrREADWRITE
- },
- { // Field 3 - Last Name
- 3, "Last Name", fldZSTRING, fldUNKNOWN,
- NAMELEN, 0, 0, 0, 0,
- fldvNOCHECKS, fldrREADWRITE
- },
- { // Field 4 - Date of Birth
- 4, "DOB", fldDATE, fldUNKNOWN,
- 0, 0, 0, 0, 0,
- fldvNOCHECKS, fldrREADWRITE
- },
- { // Field 5 - Place of Birth
- 5, "POB", fldZSTRING, fldUNKNOWN,
- PLACELEN, 0, 0, 0, 0,
- fldvNOCHECKS, fldrREADWRITE
- }
- }; // Array of field descriptors.
-
- // Index descriptor - describes the index associated with the
- // table.
- static SNIPFAR IDXDesc idxDesc[] = {
- { // Primary Index - Full Name.
- "Full Name", // Name
- 1, // Number
- { NULL }, // Tag name ( for dBase )
- { NULL }, // Optional format ( BTREE,
- // HASH, etc )
- TRUE, // Primary?
- TRUE, // Unique?
- FALSE, // Descending?
- TRUE, // Maintained?
- FALSE, // Subset?
- FALSE, // Expression index?
- NULL, // For QBE only
- 3, // Fields in key
- 1, // Length in bytes
- FALSE, // Index out of date?
- 0, // Key type of expression
- { 1,2,3 }, // Array of field numbers
- { 0 }, // Key expression
- { 0 }, // Key condition
- FALSE, // Case insensitive
- 0, // Block size in bytes
- 0 // Restructure number
- },
- { // Secondary Index 1 - single-field - maintained,
- // Case insensitive.
- "Last Name", 2, { NULL }, { NULL }, FALSE, FALSE, FALSE,
- TRUE, FALSE, FALSE, NULL, 1, 1, FALSE, 0, { 3 }, { 0 },
- { 0 }, TRUE, 0, 0
- },
- { // Secondary Index 2 - multi-field - maintained.
- "Name", 3, { NULL }, { NULL }, FALSE, FALSE, FALSE, TRUE,
- FALSE, FALSE, NULL, 2, 1, FALSE, 0, { 3,1 }, { 0 }, { 0 },
- FALSE, 0, 0
- }
- };
-
- // Index descriptor - Describes the indexes associated with the
- // table. This index will be added to the table after the table
- // has been created.
- static SNIPFAR IDXDesc idxDesc1[] = {
- { // Secondary Index 3 - single-field - not maintained.
- "POB", 4, { NULL }, { NULL }, FALSE, FALSE, FALSE, FALSE,
- FALSE, FALSE, NULL, 1, 1, FALSE, 0, { 5 }, { 0 }, { 0 },
- FALSE, 0, 0
- }
- };
-
- // Number of fields in the table.
- static const unsigned uNumFields = sizeof(fldDesc) / sizeof (fldDesc[0]);
-
- // Number of indexes to be created when the table is created.
- static const unsigned uNumIndexes = sizeof(idxDesc) / sizeof(idxDesc[0]);
-
- static DBIResult InitTable(phDBIDb phDb);
- static DBIResult AddRecord(phDBICur hCur, pCHAR pszFirst, pCHAR pszMiddle,
- pCHAR pszLast, UINT16 iMonth, UINT16 iDay,
- UINT16 iYear, pCHAR pszPOB);
-
- //=====================================================================
- // Function:
- // IndexPDox();
- //
- // Description:
- // This example shows how to create and add Paradox indexes.
- // This includes creating primary indexes and managing
- // non-maintained secondary indexes.
- //=====================================================================
- void
- IndexPDox (void)
- {
- hDBIDb hDb; // Database handle
- hDBICur hCur; // Cursor handle
- CURProps TblProps; // Table properties
- IDXDesc *MyDesc; // Index descriptor
- UINT16 i; // Loop variable
- DBIResult rslt; // Return value from IDAPI functions
-
- Screen("*** Paradox Index Manipulation Example ***\r\n");
-
- BREAK_IN_DEBUGGER();
-
- Screen(" Initializing IDAPI...");
- if (InitAndConnect(&hDb) != DBIERR_NONE)
- {
- Screen("\r\n*** End of Example ***");
- return;
- }
-
- Screen(" Setting the database directory...");
- rslt = DbiSetDirectory(hDb, (pCHAR) szTblDirectory);
- ChkRslt(rslt, "SetDirectory");
-
- // Create the table and fill with data.
- if (InitTable(&hDb))
- {
- CloseDbAndExit(&hDb);
- Screen("\r\n*** End of Example ***");
- return;
- }
-
- // Add an index to the table. Note that the index is added to the
- // table before the table is opened - the table must either be closed
- // or be opened in exclusive mode to add an index.
- Screen(" Add an index to the table...");
- rslt = DbiAddIndex(hDb, NULL, (pCHAR) szTblName, (pCHAR) szTblType,
- idxDesc1, NULL);
- ChkRslt(rslt, "AddIndex");
-
-
- Screen(" Open the %s table...", szTblName);
- rslt = DbiOpenTable(hDb, (pCHAR) szTblName, (pCHAR) szTblType,
- NULL, NULL, 0, dbiREADWRITE, dbiOPENSHARED,
- xltFIELD, FALSE, NULL, &hCur);
- if (ChkRslt(rslt, "OpenTable") != DBIERR_NONE)
- {
- CloseDbAndExit(&hDb);
- Screen("\r\n*** End of Example ***");
- return;
- }
-
- Screen(" Get the number of indexes on the %s table...", szTblName);
- rslt = DbiGetCursorProps(hCur, &TblProps);
- ChkRslt(rslt, "GetCursorProps");
-
- Screen(" There are %d indexes on the table", TblProps.iIndexes);
-
- // Allocate space for the index descriptor.
- MyDesc = (IDXDesc *) malloc(sizeof(IDXDesc) * TblProps.iIndexes);
- if (MyDesc == NULL)
- {
- Screen(" Error - Out of memory");
- CloseDbAndExit(&hDb);
- Screen("\r\n*** End of Example ***");
- return;
- }
-
- Screen(" Get and display information about the indexes");
- Screen("\r\n Name\t\t ID\tPrimary Maintained "
- "Fields Case_Insensitive");
- Screen(" =================================================="
- "==========");
- for (i = 0;i < TblProps.iIndexes; i++)
- {
- rslt = DbiGetIndexDesc(hCur, (i+1), &(MyDesc[i]));
- ChkRslt(rslt, "GetIndexDesc");
-
- Screen(" %-15s\t%5d \t%s\t%2s\t %4d\t %2s",
- (strcmp(MyDesc[i].szName, "") ? MyDesc[i].szName :
- "*Primary Index*"), // Primary indexes don't have a name.
- MyDesc[i].iIndexId, // The ID of the Index.
- // Display "TRUE" or "FALSE" as opposed to 1 or 0....
- (MyDesc[i].bPrimary ? "TRUE" : "FALSE"),
- (MyDesc[i].bMaintained ? "TRUE" : "FALSE"),
- MyDesc[i].iFldsInKey,
- (MyDesc[i].bCaseInsensitive ? "TRUE" : "FALSE"));
- }
-
- rslt = DbiSetToBegin(hCur);
- ChkRslt(rslt, "SetToBegin");
-
- // Display the records in the table. The order of the records depends
- // on the active index - in this case, it is the primary index.
- Screen("\r\n Display the records in the table in the order of the"
- " primary \r\n index - First, Middle, Last");
- DisplayTable(hCur, 0);
-
- // Switch the index that the table is opened on - only need to
- // provide one of the following: IndexName, TagName, or IndexId.
- Screen("\r\n Change the table to be opened on the \"Last Name\""
- " index...");
- rslt = DbiSwitchToIndex(&hCur, idxDesc[1].szName, NULL, NULL, FALSE);
- ChkRslt(rslt, "SwitchToIndex");
-
- // Go to the beginning of the table.
- rslt = DbiSetToBegin(hCur);
- ChkRslt(rslt, "SetToBegin");
-
- Screen(" Display the records in the table in the order of the"
- " \"Last Name\" index...");
- DisplayTable(hCur, 0);
-
- Screen("\r\n Add a record to the table in order to invalidate"
- " non-maintained indexes...");
- AddRecord(&hCur, "Jerry", "Joel", "Raccah", 5, 22, 1958,
- "Lake Tahoe");
-
- // Switch the index that the table is opened on - only need to
- // provide one of the following: IndexName, TagName, or IndexId.
- // This function is passed an ID of 5 which is the id of the
- // single field that it is indexing on.
- Screen("\r\n Change the table to be opened on the \"POB\""
- " index (which is non-maintained)...");
- Screen("\r\n Error expected - the \"POB\" index is"
- " not maintained");
-
- rslt = DbiSwitchToIndex(&hCur, NULL, NULL, MyDesc[1].iIndexId, FALSE);
- ChkRslt(rslt, "SwitchToIndex");
-
- Screen("\r\n Steps to regenerate the \"POB\" index...");
- Screen(" Close the table - the table must be open in"
- " exclusive mode to regenerate \r\n the indexes...");
-
- rslt = DbiCloseCursor(&hCur);
- ChkRslt(rslt, "CloseCursor");
-
- Screen(" Open the table in exclusive mode...");
- rslt = DbiOpenTable(hDb, (pCHAR) szTblName, (pCHAR) szTblType,
- NULL, NULL, 0, dbiREADWRITE, dbiOPENEXCL,
- xltFIELD, FALSE, NULL, &hCur);
- if (ChkRslt(rslt, "OpenTable") != DBIERR_NONE)
- {
- CloseDbAndExit(&hDb);
- Screen("\r\n*** End of Example ***");
- return;
- }
-
- Screen(" Regenerate the index...");
- rslt = DbiRegenIndex(hDb, hCur, (pCHAR) szTblName, (pCHAR) szTblType,
- MyDesc[1].szName, NULL, NULL);
- ChkRslt(rslt, "RegenIndexes");
-
- // Switch the index that the table is opened on - only need to
- // provide one of the following: IndexName, TagName, or IndexId
- // (parameter 2, 3, or 4 to DbiSwitchToIndex).
- Screen("\r\n Change the table to be opened on the \"POB\""
- " index (which is non-maintained)...");
- rslt = DbiSwitchToIndex(&hCur, MyDesc[1].szName, NULL, NULL, FALSE);
- ChkRslt(rslt, "SwitchToIndex");
-
- rslt = DbiSetToBegin(hCur);
- ChkRslt(rslt, "SetToBegin");
-
- Screen(" Display the records in the table in the order of the"
- " \"POB\" (Place of Birth)\r\n index...");
- DisplayTable(hCur, 0);
-
- // Note that the table has to be opened in exclusive mode or closed
- // to delete an index.
- Screen("\r\n Delete the \"Last Name\" index...");
-
- rslt = DbiDeleteIndex(hDb, NULL, (pCHAR) szTblName, (pCHAR) szTblType,
- "Last Name", "", NULL);
- ChkRslt(rslt, "DeleteIndex");
-
- Screen(" Close the %s table...", szTblName);
- rslt = DbiCloseCursor(&hCur);
- ChkRslt(rslt, "CloseCursor");
-
- Screen(" Delete the %s table and remaining indexes...", szTblName);
- rslt = DbiDeleteTable(hDb, (pCHAR) szTblName, (pCHAR) szTblType);
- ChkRslt(rslt, "DeleteTable");
-
- free(MyDesc);
-
- Screen(" Close the database and exit IDAPI...");
- CloseDbAndExit(&hDb);
-
- Screen("\r\n*** End of Example ***");
- }
-
- //=====================================================================
- // Function:
- // InitTable(phDb);
- //
- // Input: phDb - Pointer to the database handle
- //
- // Return: Result of the table initialization
- //
- // Description:
- // This function will create a table and fill it
- // with a number of records.
- //=====================================================================
- DBIResult
- InitTable (phDBIDb phDb)
- {
- DBIResult rslt; // Value returned from IDAPI functions
- hDBICur hCur; // Cursor handle for the table that is
- // created
- CRTblDesc crTblDsc; // Table descriptor
- BOOL bOverWrite = TRUE; // Overwrite, yes/no flag
-
- // Initialize the table create descriptor.
- memset(&crTblDsc, 0, sizeof(CRTblDesc));
- strcpy(crTblDsc.szTblName, szTblName);
- strcpy(crTblDsc.szTblType, szTblType);
- crTblDsc.iFldCount = uNumFields;
- crTblDsc.pfldDesc = fldDesc;
- crTblDsc.iIdxCount = uNumIndexes;
- crTblDsc.pidxDesc = idxDesc;
-
- Screen(" Creating the %s table...", szTblName);
-
- rslt = DbiCreateTable(*phDb, bOverWrite, &crTblDsc);
- if (ChkRslt(rslt, "CreateTable") != DBIERR_NONE)
- {
- return rslt;
- }
-
- rslt = DbiOpenTable(*phDb, (pCHAR) szTblName, (pCHAR) szTblType,
- NULL, NULL, 0, dbiREADWRITE, dbiOPENSHARED,
- xltFIELD, FALSE, NULL, &hCur);
- if (ChkRslt(rslt, "OpenTable") != DBIERR_NONE)
- {
- return rslt;
- }
-
- // Add records to the table.
- Screen(" Add records to the table...");
- AddRecord(&hCur, "Klaus", "John", "Lockwood", 7, 28, 1968,
- "Chicago");
- AddRecord(&hCur, "Tracy", "Dunvan", "Aoki", 12, 27, 1969,
- "Hermosa Beach");
- AddRecord(&hCur, "John", "David", "Krull", 2, 7, 1954,
- "Ohmaha");
- AddRecord(&hCur, "Goliath", "Joel", "Raccah", 4, 13, 1966,
- "Tel Aviv");
-
- rslt = DbiCloseCursor(&hCur);
- ChkRslt(rslt, "CloseCursor");
-
- return rslt;
- }
-
- //=====================================================================
- // Function:
- // AddRecord(hCur, pszFirst, pszMiddle, pszLast, iMonth,
- // iDay, iYear, pszPOB);
- //
- // Input: hCur - Pointer to the cursor handle
- // pszFirst - First name
- // pszMiddle - Middle name
- // pszLast - Last name
- // iMonth - Month of birth
- // iDay - Day of birth
- // iYear - Year of birth
- // pszPOB - Place of birth
- //
- // Return: Result of adding the record to the table
- //
- // Description:
- // This function will add a record to the given table.
- //=====================================================================
- DBIResult
- AddRecord (phDBICur hCur, pCHAR pszFirst, pCHAR pszMiddle, pCHAR pszLast,
- UINT16 iMonth, UINT16 iDay, UINT16 iYear, pCHAR pszPOB)
- {
- DATE Date; // Date structure
- DBIResult rslt; // Value returned from IDAPI functions
- CURProps TblProps; // Table properties
- pBYTE pRecBuf; // Record buffer
-
- // Allocate a record buffer.
- rslt = DbiGetCursorProps(*hCur, &TblProps);
- ChkRslt(rslt, "GetCursorProps");
-
- pRecBuf = (pBYTE) malloc(TblProps.iRecBufSize * sizeof(BYTE));
- if (pRecBuf == NULL)
- {
- return DBIERR_NOMEMORY;
- }
-
- // Make sure we're starting with a clean record buffer.
- rslt = DbiInitRecord(*hCur, pRecBuf);
- ChkRslt(rslt, "InitRecord");
-
- // First name.
- rslt = DbiPutField(*hCur, 1, pRecBuf, (pBYTE) pszFirst);
- ChkRslt(rslt, "PutField");
-
- // Middle name.
- rslt = DbiPutField(*hCur, 2, pRecBuf, (pBYTE) pszMiddle);
- ChkRslt(rslt, "PutField");
-
- // Last name.
- rslt = DbiPutField(*hCur, 3, pRecBuf, (pBYTE) pszLast);
- ChkRslt(rslt, "PutField");
-
- // Date of birth.
- rslt = DbiDateEncode(iMonth, iDay, iYear, &Date);
- ChkRslt(rslt, "DateEncode");
-
- rslt = DbiPutField(*hCur, 4, pRecBuf, (pBYTE) &Date);
- ChkRslt(rslt, "PutField");
-
- // Place of Birth.
- rslt = DbiPutField(*hCur, 5, pRecBuf, (pBYTE) pszPOB);
- ChkRslt(rslt, "PutField");
-
- rslt = DbiInsertRecord(*hCur, dbiNOLOCK, pRecBuf),
- ChkRslt(rslt, "InsertRecord");
-
- free(pRecBuf);
-
- return rslt;
- }
-