my $sql = <<'END_OF_SQL' ;
CREATE TABLE "SO"."EL_HAND_RECEIPT"
(
    EL_ID             NUMBER(20) NOT NULL,
    UIC               VARCHAR2(6) NULL,
    ISSUE_RECEIPT_CD          VARCHAR2(1) NOT NULL,
    PRIMARY KEY (EL_ID)
)
TABLESPACE DATA
/
END_OF_SQL

my $table = 'EL_HAND_RECEIPT' ;

$sql =~ s/PRIMARY KEY/CONSTRAINT PK_$table PRIMARY KEY/;

print $sql ;
[download]

_______________
DamnDirtyApe

Those who know that they are profound strive for clarity. Those who
would like to seem profound to the crowd strive for obscurity.
            --Friedrich Nietzsche