Ora8GetString Function

Action

Retrieves a string either from the program variable that is bound with the specified place holder in the SQL statement or PL/SQL block, or from the output variable that is defined for the specified select-list item in the SQL query. This function is used to retrieve values from both scalar and array program variables that are defined for the specified select-list item.

If this function is used to retrieve one of the following data types, the retrieved value is automatically converted to a string:

SQLT_DAT
SQL_INT
SQLT_FLT

Include file

Ora8.bdh

Syntax

Ora8GetString( in hStmt   : number,
               in sSqlVar : string,
               in nIndex  : number optional): string;

Return value

Retrieved string, containing at most 253 characters. If the string to be retrieved consists of more than 253 characters, it is automatically cut off at the corresponding position.

Parameter	Description
hStmt	Statement handle.
sSqlVar	This parameter can be one of the following: The name of the place holder in the SQL statement or PL/SQL block. In this case, the parameter must include the preceding colon identifying it as a place holder. The index of the select-list item in the SQL query. Position indices start at 1 for the first (leftmost) select-list item. 注: In the latter case, the column number has to be passed to the function as a string.
nIndex	Index or row number (optional). This parameter has to be passed to the function whenever retrieving a string assigned to an array place holder or fetching data from multiple rows. It can be one of the following: The array index of the program variable. The row number for the string in the fetched data.

Parameter

Description

hStmt

Statement handle.

sSqlVar

This parameter can be one of the following:

The name of the place holder in the SQL statement or PL/SQL block. In this case, the parameter must include the preceding colon identifying it as a place holder.
The index of the select-list item in the SQL query. Position indices start at 1 for the first (leftmost) select-list item.

注: In the latter case, the column number has to be passed to the function as a string.

nIndex

Index or row number (optional). This parameter has to be passed to the function whenever retrieving a string assigned to an array place holder or fetching data from multiple rows. It can be one of the following:

The array index of the program variable.
The row number for the string in the fetched data.

Example

var
  ghEnv0        : number;
  ghError0      : number;
  ghStmt0       : number;
  ghSvcCtx0     : number;

dcltrans
  transaction TMain
  var
    nAge : number;
    sName : string;
  begin
    Ora8Init(ghEnv0, OCI_DEFAULT);
    Ora8HandleAlloc(ghEnv0, ghError0, OCI_HTYPE_ERROR);
    Ora8Logon(ghEnv0, ghSvcCtx0, "user", "password", "orclnet2");

    Ora8HandleAlloc(ghEnv0, ghStmt0, OCI_HTYPE_STMT);
    Ora8StmtPrepare(ghStmt0, sqlSelect, OCI_NTV_SYNTAX);

    Ora8Bind(ghStmt0, ":1", SQLT_INT);
    Ora8SetInt(ghStmt0, ":1", 25);
    Ora8Define(ghStmt0, 1, SQLT_CHR, 32);
    Ora8Define(ghStmt0, 2, SQLT_INT);
    Ora8StmtExecute(ghSvcCtx0, ghStmt0);

      while Ora8StmtFetch(ghStmt0, 1, 1) do
      sName := Ora8GetString(ghStmt0, "1");
      nAge  := Ora8GetInt(ghStmt0, "2");
      write(sName, 32); write(nAge, 5); writeln;
    end;

    Ora8HandleFree(ghStmt0, OCI_HTYPE_STMT);
    Ora8Logoff(ghSvcCtx0);
    Ora8HandleFree(ghError0, OCI_HTYPE_ERROR);
    Ora8HandleFree(ghEnv0, OCI_HTYPE_ENV);
  end TMain;

dclsql
  sqlSelect:
    SELECT * FROM persons WHERE age > :1;

Output

Howard 33Michael 44Bobby 61Sara 38