/** Evaluate an expression */
public void exec(HplsqlParser.ExprContext ctx) {
try {
if (ctx.T_ADD() != null) {
operatorAdd(ctx);
} else if (ctx.T_SUB() != null) {
operatorSub(ctx);
} else if (ctx.T_MUL() != null) {
operatorMultiply(ctx);
} else if (ctx.T_DIV() != null) {
operatorDiv(ctx);
} else if (ctx.interval_item() != null) {
createInterval(ctx);
} else {
visitChildren(ctx);
}
} catch (Exception e) {
exec.signal(e);
}
}
/** Evaluate an expression in executable SQL statement */
public void execSql(HplsqlParser.ExprContext ctx) {
StringBuilder sql = new StringBuilder();
if (ctx.T_OPEN_P() != null) {
sql.append("(");
if (ctx.select_stmt() != null) {
exec.append(
sql,
evalPop(ctx.select_stmt()).toString(),
ctx.T_OPEN_P().getSymbol(),
ctx.select_stmt().getStart());
exec.append(
sql, ctx.T_CLOSE_P().getText(), ctx.select_stmt().stop, ctx.T_CLOSE_P().getSymbol());
} else {
sql.append(evalPop(ctx.expr(0)).toString());
sql.append(")");
}
} else if (ctx.T_MUL() != null) {
sql.append(evalPop(ctx.expr(0)).toString());
sql.append(" * ");
sql.append(evalPop(ctx.expr(1)).toString());
} else if (ctx.T_DIV() != null) {
sql.append(evalPop(ctx.expr(0)).toString());
sql.append(" / ");
sql.append(evalPop(ctx.expr(1)).toString());
} else if (ctx.T_ADD() != null) {
sql.append(evalPop(ctx.expr(0)).toString());
sql.append(" + ");
sql.append(evalPop(ctx.expr(1)).toString());
} else if (ctx.T_SUB() != null) {
sql.append(evalPop(ctx.expr(0)).toString());
sql.append(" - ");
sql.append(evalPop(ctx.expr(1)).toString());
} else if (ctx.interval_item() != null) {
sql.append(exec.getFormattedText(ctx));
} else {
visitChildren(ctx);
sql.append(exec.stackPop().toString());
}
exec.stackPush(sql);
}
