SqlStatement Class

In This Topic

Represents a single statement in a script.

Syntax

Visual Basic
C#

'Declaration
 
Public Class SqlStatement

public class SqlStatement

Remarks

Use SqlStatement to execute individual statements in a script. Each SqlStatement object contains SQL text and information about location of statement in the whole script.

SqlStatement object can be obtained through DbScript.Statements collection. After originating ScriptText has been modified any obsolete SqlStatement objects can no longer be used.

Example

This sample shows how to retrieve collection of statements that make up the script and execute them one by one.

csharp

string script =
  "DROP TABLE DEPT;"+
  "CREATE TABLE DEPT ("+
  "  DEPTNO INT PRIMARY KEY,"+
  "  DNAME VARCHAR(14),"+
  "  LOC VARCHAR(13)"+
  ")WITH OIDS;"+
  "INSERT INTO DEPT VALUES (10,'ACCOUNTING','NEW YORK');"+
  "INSERT INTO DEPT VALUES (20,'RESEARCH','DALLAS');"+
  "INSERT INTO DEPT VALUES (30,'SALES','CHICAGO');"+
  "INSERT INTO DEPT VALUES (40,'OPERATIONS','BOSTON');"+
  "SELECT * FROM DEPT";
PgSqlConnection pgConn = new PgSqlConnection(
    "host=server;database=test;user id=postgres;");
PgSqlScript pgScript = new PgSqlScript(script,pgConn);
SqlStatementCollection pgColl = pgScript.Statements;
IDataReader pgReader;
pgConn.Open();
foreach (SqlStatement pgStatement in pgColl)
{
  Console.WriteLine(pgStatement.Text);
  try
  {
    pgReader = pgStatement.Execute();
    Console.WriteLine("  Records affected " + pgReader.RecordsAffected); 
    while (pgReader.Read()) 
    { 
      Console.WriteLine(pgReader.GetString(0)); 
    } 
    pgReader.Close(); 
    Console.WriteLine();
  }
  catch
  {
    Console.WriteLine("  Failed");
  }
}
pgConn.Close();

Visual Basic

Dim script As String = _
  "DROP TABLE DEPT;" & _
  "CREATE TABLE DEPT (" & _
  "  DEPTNO INT PRIMARY KEY," & _
  "  DNAME VARCHAR(14)," & _
  "  LOC VARCHAR(13)" & _
  ")WITH OIDS;" & _
    "INSERT INTO DEPT VALUES (10,'ACCOUNTING','NEW YORK');" & _
    "INSERT INTO DEPT VALUES (20,'RESEARCH','DALLAS');" & _
    "INSERT INTO DEPT VALUES (30,'SALES','CHICAGO');" & _
    "INSERT INTO DEPT VALUES (40,'OPERATIONS','BOSTON');" & _
    "SELECT * FROM DEPT"
Dim pgConn As PgSqlConnection = New PgSqlConnection( _
    "host=server;database=test;user id=postgres;")
Dim pgScript As PgSqlScript = New PgSqlScript(script, pgConn)
Dim pgColl As SqlStatementCollection = pgScript.Statements
Dim pgReader As IDataReader
pgConn.Open()
For Each pgStatement As SqlStatement In pgColl
  Console.WriteLine(pgStatement.Text)
  Try
    pgReader = pgStatement.Execute()
    Console.WriteLine("  Records affected " & pgReader.RecordsAffected)
    While pgReader.Read()
      Console.WriteLine(pgReader.GetString(0))
    End While
    pgReader.Close()
    Console.WriteLine()
  Catch ex As Exception
    Console.WriteLine("  Failed")
  End Try
Next pgStatement
pgConn.Close()

Inheritance Hierarchy

System.Object
Devart.Common.SqlStatement

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

SqlStatement Members
Devart.Common Namespace
SqlStatementCollection Class

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