/** String concatenation operator in executable SQL statement */
public void operatorConcatSql(HplsqlParser.Expr_concatContext ctx) {
StringBuilder sql = new StringBuilder();
sql.append("CONCAT(");
int cnt = ctx.expr_concat_item().size();
for (int i = 0; i < cnt; i++) {
sql.append(evalPop(ctx.expr_concat_item(i)).toString());
if (i + 1 < cnt) {
sql.append(", ");
}
}
sql.append(")");
exec.stackPush(sql);
}
/** String concatenation operator */
public void operatorConcat(HplsqlParser.Expr_concatContext ctx) {
StringBuilder val = new StringBuilder();
int cnt = ctx.expr_concat_item().size();
boolean nulls = true;
for (int i = 0; i < cnt; i++) {
Var c = evalPop(ctx.expr_concat_item(i));
if (!c.isNull()) {
val.append(c.toString());
nulls = false;
}
}
if (nulls) {
evalNull();
} else {
evalString(val);
}
}
