Function getVariable

src/bin/pgbench/pgbench.c:1461–1491

Get the value of a variable, in string form; returns NULL if unknown */

/* Get the value of a variable, in string form; returns NULL if unknown */
static char *
getVariable(CState *st, char *name)
{
	Variable   *var;
	char		stringform[64];

	var = lookupVariable(st, name);
	if (var == NULL)
		return NULL;			/* not found */

	if (var->svalue)
		return var->svalue;		/* we have it in string form */

	/* We need to produce a string equivalent of the value */
	Assert(var->value.type != PGBT_NO_VALUE);
	if (var->value.type == PGBT_NULL)
		snprintf(stringform, sizeof(stringform), "NULL");
	else if (var->value.type == PGBT_BOOLEAN)
		snprintf(stringform, sizeof(stringform),
				 "%s", var->value.u.bval ? "true" : "false");
	else if (var->value.type == PGBT_INT)
		snprintf(stringform, sizeof(stringform),
				 INT64_FORMAT, var->value.u.ival);
	else if (var->value.type == PGBT_DOUBLE)
		snprintf(stringform, sizeof(stringform),
				 "%.*g", DBL_DIG, var->value.u.dval);
	else						/* internal error, unexpected type */
		Assert(0);
	var->svalue = pg_strdup(stringform);
	return var->svalue;
}

/* Try to convert variable to a value; return false on failure */
static bool