Bonjour à tous je le script SQLServer suivant et je cherche à le passer sous PostGresSQL, quelqu'un pourrait-il m'aider svp ?

Merci

DECLARE @state char(100);
SET @state = (SELECT DATA_TYPE FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'Interaction' AND COLUMN_NAME = 'IntPlace');
IF 'char' = @state
    BEGIN
        PRINT 'IntPlace is a char DATA_TYPE'
        IF 350 > (SELECT CHARACTER_MAXIMUM_LENGTH FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'Interaction' AND COLUMN_NAME = 'IntPlace')
            BEGIN
                PRINT 'IntPlace is smaller than 350';
                ALTER TABLE Interaction ALTER COLUMN IntPlace char(350);
            END
    END
       
IF 'varchar' = @state
    BEGIN
        PRINT 'IntPlace is a varchar DATA_TYPE'
        IF 350 > (SELECT CHARACTER_MAXIMUM_LENGTH FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'Interaction' AND COLUMN_NAME = 'IntPlace')
            BEGIN
                PRINT 'IntPlace is smaller than 350';
                ALTER TABLE Interaction ALTER COLUMN IntPlace varchar(350);
            END
    END
       
IF 'nvarchar' = @state
    BEGIN
        PRINT 'IntPlace is a nvarchar DATA_TYPE'
        IF 350 > (SELECT CHARACTER_MAXIMUM_LENGTH FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'Interaction' AND COLUMN_NAME = 'IntPlace')
            BEGIN
                PRINT 'IntPlace is smaller than 350';
                ALTER TABLE Interaction ALTER COLUMN IntPlace nvarchar(350);
            END
    END
   
IF 'nchar' = @state
    BEGIN
        PRINT 'IntPlace is a nchar DATA_TYPE'
        IF 350 > (SELECT CHARACTER_MAXIMUM_LENGTH FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'Interaction' AND COLUMN_NAME = 'IntPlace')
            BEGIN
                PRINT 'IntPlace is smaller than 350';
                ALTER TABLE Interaction ALTER COLUMN IntPlace nchar(350);
            END
    END